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1

Bertolucci, Franco. "Operant and classical learning in Drosophila melanogaster: the ignorant gene (ign)." kostenfrei, 2008. http://www.opus-bayern.de/uni-wuerzburg/volltexte/2009/3398/.

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2

Santos, Viviane Freitas. "Ciclos econ?micos e arranjos institucionais no Brasil : a vis?o de Ign?cio Rangel." Pontif?cia Universidade Cat?lica do Rio Grande do Sul, 2013. http://tede2.pucrs.br/tede2/handle/tede/3953.

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This essay aims to research the conceptual similarities and the differences between three "schools" of contemporary economic thought, namely the Regulation School, the School of Social Structure of Accumulation and Ign?cio Rangel. For such purpose, it was made an compulsory literature review of each studied "school", dealing with the main concepts and discussing their interpretation about the crises of capitalism. Finally, on the last chapter, it were discussed the impressions of each "school" on perceptions of capitalist mode of production, the institutions which will form socioeconomic structures and policies, besides the discussion on technical progress. These considerations bring the thoughts of the schools on the study of the crises of capitalism as well as the role of institutions in observed changes in recent economic history to resume profit rates. Therefore, it was realized that the arguments used to understand the crisis of the 1970s and its implications for the world economy from the perspective of Regulation Theory and Social Structure of Accumulation Theory, they had already been indicated by Ignacio Rangel since the early 1940s, from his considerations about Brazil.
Esta disserta??o tem por objetivo investigar as aproxima??es conceituais e as diverg?ncias existentes entre tr?s escolas do pensamento econ?mico contempor?neo, a saber: a Escola da Regula??o, a escola da Estrutura Social de Acumula??o e Ign?cio Rangel. Para tanto, foi feito uma revis?o da literatura basilar de cada escola estudada, abordando os principais conceitos e discutindo sua interpreta??o sobre as crises do capitalismo. Por fim, no ?ltimo cap?tulo, foram abordadas as impress?es de cada escola sobre as percep??es do modo de produ??o capitalista, quais as institui??es que ir?o compor as estruturas socioecon?micas e pol?ticas, al?m, da discuss?o sobre progresso t?cnico. Estas considera??es trazem as reflex?es das escolas no estudo das crises do capitalismo, bem como o papel das institui??es nas mudan?as observadas na hist?ria econ?mica recente para retomar as taxas de lucro. Percebeu-se, portanto, que os argumentos utilizados para compreender a crise da d?cada de 1970 e seus desdobramentos na economia mundial, a partir da ?tica da Escola da Regula??o e da Estrutura Social de Acumula??o j? haviam sido apontados por Ign?cio Rangel desde o in?cio da d?cada 1940, a partir de suas considera??es sobre o Brasil.
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3

Renault, Neil. "Construction, method development and comparative testing of an 'All-Diet' protein microarray to measure IgA, IgM, IgG and IgE in human sera and milk." Thesis, University of Nottingham, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.503929.

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Existing immunoglobulin (Ig) tests only give a limited picture of the immunological response to food antigens. Furthermore, existing tests require large volumes of sample, over a limited number of foods, are not amenable to a high sample through-put system and the results are limited to normally just one immunoglobulin class. In order to investigate the global immune response towards food products we have developed the "all diet" microarray concept. The "all-diet food protein microarray contains extracts of over 400 food ingredients that cover most of the food products found in the UK. Using this system we have retrospectively determined food specific IgE, IgA, IgG and IgM from 17 well characterized sera. The results were analyzed by multivariate techniques and parametric methods. The proof-of-concept of the ''all diet microarray to investigate the relationships between food antigen specificity and multiple Ig type was demonstrated here. The novelity of this protein microarray is the use of arrayed food samples sequentially extracted with detergent and chaotropic agents. The array system possesses many advantages over traditional systems such as requirement of low sample volume, high sensitivity and a global view of the immune response. Notwithstanding these potential advantages to clinical practices, these benefits remain yet to be demonstrated. The development of the technique will allow further expansion into areas of research such as conjugation of the microarray with sensitized human basophils and also immunoglobulin binding to extracts of parasites.
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4

Sellers, Lisa K. "Exercise-induced alterations in immunoglobulin (IgA, IgG, IgM) levels in cancer versus non-cancer patients." Muncie, Ind. : Ball State University, 2008. http://cardinalscholar.bsu.edu/384.

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5

Ribeiro, Pedro Mandagar? "1975 : o dispositivo engajamento : Zero, de Ign?cio de Loyola Brand?o, e El oto?o del patriarca, de Gabriel Garc?a M?rquez." Pontif?cia Universidade Cat?lica do Rio Grande do Sul, 2012. http://tede2.pucrs.br/tede2/handle/tede/2053.

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This dissertation is part of a contemporary trend of writing the literary history of a single year in this case, 1975. To do that, I take Michel Foucault s concept of apparatus, and its development by Hans Ulrich Gumbrecht and Giorgio Agamben, and describe the apparatus of engagement. The apparatus is described genealogically, through readings of Jean-Paul Sartre and Theodor Adorno. I show that the concept of engagement has three different meanings, which I describe as three levels. The novels Zero, by Ign?cio de Loyola Brand?o, and El oto?o del patriarca, by Gabriel Garc?a M?rquez, both published in 1975, are analyzed in what pertains to their narrators and protagonists, and the results are compared to the described levels of engagement. The conclusion shows that there is a presence of the apparatus of engagement in these novels. In the concluding remarks, the historical inscription of the novels is discussed, both relating to Latin American general history and to cultural and literary history
Esta tese se inscreve dentro do projeto contempor?neo de escrever a hist?ria da literatura de um s? ano, no caso o ano de 1975. Para tanto, toma-se o conceito de dispositivo, de Michel Foucault, e seus desenvolvimentos por Hans Ulrich Gumbrecht e Giorgio Agamben, e se descreve o dispositivo engajamento. O dispositivo ? descrito de maneira geneal?gica, a partir de leituras de Jean-Paul Sartre e Theodor Adorno. ? mostrado que o conceito de engajamento apresenta tr?s acep??es, descritas como tr?s n?veis. A seguir se analisam os romances Zero, de Ign?cio de Loyola Brand?o, e El oto?o del patriarca, de Gabriel Garc?a M?rquez, ambos publicados em 1975, no que se refere aos seus narradores e protagonistas, e se comparam os resultados da an?lise aos n?veis do engajamento descritos anteriormente. Conclui-se que h? a presen?a do dispositivo engajamento nas obras analisadas. Nas considera??es finais, discute-se a inscri??o hist?rica dos romances, tanto na hist?ria geral da Am?rica Latina quanto em rela??o ? hist?ria liter?ria e cultural
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6

Ashburn, David. "The relevance of IgA and IgE assays, IgG avidity and western blotting in the diagnosis of Toxoplasma infection." Thesis, University of Aberdeen, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.361776.

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To improve diagnosis of Toxoplasma gondii in difficult patient groups, IgA- and IgE-immunosorbent agglutination assays (ISAGA), IgG avidity and Western blotting were developed and assessed. In the ISAGA, rabbit anti-human IgA or anti-human IgE (for the IgA-ISAGA and IgE-ISAGA respectively) was adsorbed onto microtitre plates; formaldehyde fixed tachyzoites were used to identify specific antibody. Both ISAGAs were specific; only 1/482 (0.2%) and 1/513 (0.19%) false positive results were recorded for the IgA and IgE-ISAGA respectively. Both were produced early in infection and were detected for up to 11 (IgA) and 10 (IgA) months. In the avidity ELISA, the performance of excretory/secretory, surface, cytoplasmic and mixed antigen was similar when tested with sera from patients with known duration of infection. Thirteen pregnant women were tested. Specific IgA was detected in all and so was not useful to time infection but specific IgE was absent in 5 women and may therefore have been useful to exclude recent infection. Specific IgE however, was not detected in one woman who seroconverted; detection of IgE may indicate severity of infection. High IgG avidity was measured in 4 patients and could have been useful in conjunction with IgE to exclude recent infection. In immunocompromised patients, IgA and IgE were detected with similar frequency to IgM, but their presence in some IgM negative patients makes them a useful addition to the repertoire of testing. High avidity in immunocompromised patients was not of use to improve diagnosis. Using Western blotting it was possible to differentiate between acute (< 4 months) and recent (4-10 months) infection. This test was less useful for timing infection of infection in pregnancy.
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7

RODRIGUES, Isolina Maria Xavier. "Diagnóstico pós-natal da toxoplasmose congênita através da detecção de anticorpos das classes IgG, IgM E IgA ANTI-Toxoplasma gondii." Universidade Federal de Goiás, 2006. http://repositorio.bc.ufg.br/tede/handle/tde/1832.

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Essa dissertação é composta de duas pesquisas complementares, realizadas no período de primeiro de janeiro de 2004 a 30 de setembro de 2005. No primeiro estudo, realizou-se a sorologia para IgG e IgM anti-toxoplasma no sangue do cordão de 1514 RN pela técnica MEIA e a comparação entre os resultados dos anticorpos IgG e IgM no sangue de cordão e periférico de 167 RN (86 suspeitos e 81 normais). A sorologia por MEIA permitiu que fossem selecionados 86 RN suspeitos de toxoplasmose congênita, cujas amostras foram testadas para detecção de IgM pela técnica ELFA. A comparação entre a sorologia para IgG e IgM por MEIA mostrou não haver diferença significativa entre os resultados obtidos no sangue de cordão e periférico. A triagem sorológica dos 1514 RN pela técnica MEIA revelou que: 0,59% (09/1514) apresentavam IgG e IgM reagentes; 64,60 (978/1514) apresentavam IgG reagente e IgM não reagente; 0,46% (7/1514) apresentavam IgG indeterminada e IgM não reagente e 34,35% (520/1514) apresentaram IgG e IgM não reagentes. A incidência da toxoplasmose diagnosticada pela presença de IgM pelas técnicas MEIA e ELFA foi de 6,6/1000 nascimentos, contudo essa incidência não reflete o número de RN infectados, pois muitos RN não produzem anticorpos de classe IgM ao nascer, sendo necessário que os 76 RN suspeitos e que tiveram IgM não reagentes sejam acompanhados até dois anos de idade. O segundo estudo foi realizado nas crianças suspeitas de toxoplasmose congênita acompanhadas no Ambulatório de Infecções Congênitas do HC. Das 86 encaminhadas para acompanhamento, apenas 56 retornaram para consulta. As amostras dessas crianças foram testadas para IgM anti T.gondii pelas técnicas MEIA, ELFA e IFI e para IgA por ELISA captura. O diagnóstico da infecção congênita foi concluído em 44 RN, sendo que 28 estavam infectados e 16 não estavam. Dos 28 infectados, 42,9% (12/28) apresentaram IgM reagente pelas técnicas usadas. A sensibilidade, 84 especificidade, acurácia, valores preditivos positivo e negativo das técnicas MEIA e ELFA foram iguais, respectivamente de 36,7%, 100%, 100%, 47,1% e 59,1%; da IFI 28,6%, 87,5%, 80,0%, 44,4% e 50% e da IgA de 25,0%, 100%, 100%, 43,2% e 52,3%. A IgM foi reagente em 81,8% (9/11) das crianças sintomáticas, demonstrando sua relação com a gravidade da transmissão vertical, com maiores concentrações em crianças mais afetadas pelo processo infeccioso intra-uterino. Por outro lado, não foi detectada em 57,1% (16/28) dos infectados, provavelmente em conseqüência do tratamento da mãe. A sensibilidade da IgM anti T.gondii, associando três técnicas (MEIA, ELFA e IFI) foi de 42,9% (12/28) e da IgA foi de 25% (7/28), mostrando que a suspeita de toxoplasmose congênita não pode ser afastada apenas pela ausência desses anticorpos.
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8

BESIERS, CHRISTOPHE. "Alveolites allergiques extrinseques (poumon d'eleveurs d'oiseaux et poumon du fermier) : criteres diagnostiques et interet des isotypes specifiques igg, igm et iga." Reims, 1994. http://www.theses.fr/1994REIMM027.

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9

Hjelm, Fredrik. "Early Immunostimulatory Effects of IgE- and IgG Antibodies." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-7209.

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10

Facin, Andrea Cintra. "Concentração de imunoglobulinas (IgA, IgG e IgM ) e de interleucinas (IL-1[beta], IL-10 e IF-y) em pacientes com endometriose." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2006. http://hdl.handle.net/10183/13188.

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Com o objetivo de avaliar as imunidades humoral e celular de pacientes com endometriose, analisamos as concentrações das Imunoglobulinas ( A, G e M ) e das Interleucinas (1β, 10 e IFγ) no soro e no líquido peritonial. Também analisamos a sua associação com a presença de infertilidade, o nível de dor apresentado e a extensão da endometriose. Foram coletadas amostras de soro e líquido peritonial de 43 pacientes submetidas a laparoscopia, que foram divididas em 4 grupos : 20 pacientes inférteis com endometriose, 9 pacientes inférteis sem endometriose, 4 pacientes férteis com endometriose e 10 pacientes férteis sem endometriose. As concentrações de IL-1β, IL-10 e IFγ foram determinadas pela método de ELISA e as concentrações de IgA, IgG e IgM foram feitas pela técnica de imunodifusão radial. Nas pacientes com endometriose, as concentrações de IgA no soro e do líquido peritonial foram maiores nas pacientes inférteis do que nas férteis. A IgG estava mais elevada nas pacientes sem endometriose do que nas pacientes com endometriose, todas inférteis. Os níveis de interleucina 10 no líquido peritonial de pacientes com endometriose foram mais elevados nas pacientes inférteis do que nas férteis e Interferon γ apresentou concentrações mais baixas no soro e no líquido peritonial de pacientes inférteis sem endometriose. Não houve diferenças significativas entre os grupos para as concentrações de IgM e IL-1β, bem como nas correlações entre os níveis de citocinas e imunoglobulinas entre os diferentes grupos com os graus de endometriose e os níveis de dor nessas pacientes.
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11

Ding, Zhoujie. "Feedback Enhancement of Immune Responses by IgE, IgM, and IgG3 Antibodies." Doctoral thesis, Uppsala universitet, Institutionen för medicinsk biokemi och mikrobiologi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-237337.

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Antibodies can enhance or suppress the immune responses against their specific antigens. This phenomenon is known as antibody-mediated feedback regulation. We have studied the mechanisms underlying IgE-, IgM-, and IgG3-mediated enhancement of immune responses in mouse models using intravenous immunization. We attempted to answer the following questions: 1) Which cell type presents IgE-complexed antigens to CD4+ T cells? 2) Is complement activation required for specific IgM to enhance antibody responses? 3) Does IgM enhance CD4+ T-cell responses? 4) How are IgG3-antigen complexes transported into B-cell follicles? We found that CD23+ B cells transporting IgE-antigen complexes into B-cell follicles were not required to prime the antigen-specific CD4+ T cells in vivo, whereas CD11c+ cells were indispensable. After examining the three most common subpopulations of CD11c+ cells in the spleen, we determined that it was CD8α- conventional dendritic cells migrating into the T-cell zone following immunization that presented IgE-complexed antigens to CD4+ T cells. Next, we showed that specific IgM from Cµ13 mice, which is unable to activate complement, failed to enhance either antibody or germinal center responses whereas wild-type IgM enhanced both responses. Therefore, specific IgM must activate complement to enhance humoral responses. In addition, wild-type IgM did not up-regulate CD4+ T-cell responses. Finally, we showed that IgG3-antigen complexes were transported by marginal zone B cells into B-cell follicles via binding to complement receptors 1 and 2 (CR1/2) on those cells. The immune complexes were captured by follicular dendritic cells as early as 2 h after immunization. Germinal center responses were also enhanced by IgG3. Using bone marrow chimeric mice, we found that CR1/2 expression was required on both marginal zone B cells and follicular dendritic cells to provide an optimal enhancement of antibody responses.
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Felix, Alvina Clara. "Estudo da resposta imunológica de anticorpos IgG, IgM e IgA, subclasses de IgG (IgG1 e IgG3) e avidez de IgG, por Western Blotting, em amostras de soros de pacientes com tuberculose pulmonar e comparação de resultados com métodos microbiológicos e dosagem de interferon-gama." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/5/5134/tde-21072011-135809/.

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Apesar das recomendações da Organização Mundial da Saúde, na reunião ministerial realizada em Amsterdam, Holanda em 2000, a tuberculose continua em ritmo crescente, atingindo principalmente os países em desenvolvimento e pessoas com o sistema imunológico comprometido, principalmente as infectadas pelo vírus da imunodeficiência adquirida. Os métodos utilizados no diagnóstico continuam os mesmos utilizados por muitos anos, cujas limitações impedem a ação rápida dos programas de saúde que buscam interromper a cadeia de transmissão da doença. Continuando uma linha de pesquisa do Laboratório de Soroepidemiologia e Imunobiologia do IMTSP, utilizando o método do Western Blotting, procuramos neste trabalho ampliar os conhecimentos da resposta imunológica de anticorpos em pacientes com tuberculose pulmonar, clinica e laboratorialmente definida, avaliando a participação das imunoglobulinas IgG, IgA e IgM, subclasses de IgG (IgG1 e IgG3) e a avidez da imunoglobulina IgG em amostras de soros colhidas no início e no final do tratamento. Nossos resultados mostraram que o melhor marcador imunológico foi a imunoglobulina IgG por apresentar melhor desempenho diagnóstico quando comparada com os resultados dos métodos microbiológicos e de dosagem de interferon gama, Quantiferon TB Gold. As frações protéicas que apresentaram melhor desempenho diagnóstico foram as de 38 e 30 KDa
Despite the recommendations of the World Health Organization, during the Ministerial meeting held in Amsterdam, Holland in 2000, tuberculosis continues at an important increasing rate, affecting mostly developing countries and people with severe compromised immune systems, especially those infected with human acquired immunodeficiency virus. The methods used for diagnosis are the same used for many years, whose limitations prevent the rapid action of countries health programs that seek to stop the chain of disease transmission. Continuing a line of research of the Laboratory of Seroepidemiology and Immunobiology of IMTSP using the method of Western blotting, in this study we tried to broaden the knowledge of the immune response of antibodies in patients with pulmonary tuberculosis, clinical and laboratory defined by evaluating the participation of IgG, IgA and IgM, IgG subclasses (IgG1 and IgG3) and immunoglobulin IgG avidity in serum samples collected in the beginning and end of treatment. Our results showed that the immunoglobulin IgG was best immunological marker when compared with the results of microbiological methods and determination of interferon gamma, QuantiFERON TB Gold. The proteins fractions that showed better diagnosis performance were 38 and 30 KDa
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Zimmer, Anja. "Futtermittel-spezifisches IgG und IgE vor und nach Eliminationsdiäten bei allergischen Hunden." Diss., lmu, 2012. http://nbn-resolving.de/urn:nbn:de:bvb:19-148673.

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Keiserman, Briele. "Isotipos IgG e IgM anti-dsDNA em pacientes com lúpus eritematoso sistêmico." Pontifícia Universidade Católica do Rio Grande do Sul, 2012. http://hdl.handle.net/10923/4374.

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IgG anti-dsDNA antibodies are associated to lupus nephritis. Recent data suggest that IgM isotype is nephroprotector. We evaluated the frequency of IgG anti-dsDNA in patients with Systemic lupus erythemathosus (SLE) and its relation between IgG/IgM proportion and clinical manifestations of the disease. This transversal study included 137 SLE patients according to traditional criteria (92. 5% female, 79. 5% Caucasian) and 58 SLE individual (93. 1% female, 81% Caucasian) selected by positivity for IgG anti-dsDNA. IgG and IgM anti-dsDNA antibodies were detected by Chrithidiae luciliae indirect immunofluorescence with cut point 1/10 dilution. The presence of IgG anti-dsDNA was associated to the presence of hemolytic anemia, leukopenia/lymphopenia and Complement depletion (p<0. 001). Of the 58 patients positive for IgG anti-dsDNA 15 were also positive for IgM anti-dsDNA. The group presenting both isotypes showed significant less frequency of active urinary sediment when compared to isolated IgG anti-dsDNA (6. 7% versus 34. 9%, p=0. 046). IgG/IgM proportion distribution evidenced a trend of higher medians in the presence of arthritis and leukopenia/lymphopenia [4 (2-8) versus 1 (1-2), p=0. 070 and 4 (3-8) versus 1 (1-4), p=0. 066, respectively]. Summarizing, the frequency of IG anti-dsDNA was relevant in our casuistic. Positive subpopulation for both IgG/IgM isotypes anti-dsDNA was less willing to urinary sediment alterations than IgG anti-dsDNA isolated population. These data suggest a distinct biologic behavior for IgM anti-dsDNA.
Anticorpos IgG anti-dsDNA se associam à ocorrência de nefrite lúpica. Relatos recentes sugerem que o isotipo IgM anti-dsDNA seja nefroprotetor. Avaliamos frequência de IgG anti-dsDNA em pacientes com lúpus eritematoso sistêmico (LES), e averiguamos a relação entre proporção IgG/IgM anti-dsDNA e manifestações clínicas da doença. O estudo, transversal, incluiu 137 pacientes com LES de acordo com os critérios tradicionais (92,5% mulheres, 79,5% raça branca) e uma população de 58 casos de LES (93,1% mulheres, 81% raça branca) selecionados por positividade para IgG anti-dsDNA. Anticorpos IgG e IgM anti-dsDNA foram detectados por imunofluorescência indireta com Crithidia luciliae, com ponto de corte na diluição 1/10. A presença de IgG anti-dsDNA se associou à presença de anemia hemolítica, leucolinfopenia e depleção de Complemento (p<0, 001). Dos 58 pacientes com teste positivo para IgG anti-dsDNA, 15 foram também positivos para o isotipo IgM. O grupo com ambos os isotipos teve frequência significativamente menor de sedimento urinário ativo quando comparado ao grupo com IgG anti-dsDNA isolado (6,7% versus 34,9%, p=0, 046). A distribuição da proporção IgG/IgM anti-dsDNA evidenciou tendência de medianas mais elevadas na presença de artrite e leucolinfopenia [4 (2-8) versus 1 (1-2), p=0, 070 e 4 (3-8) versus 1 (1-4), p=0, 066, respectivamente]. Em suma, a frequência de IgG anti-dsDNA foi relevante em nossa casuística. A subpopulação positiva para ambos IgG e IgM anti-dsDNA foi menos propensa a alterações de sedimento urinário do que aquela com IgG anti-dsDNA isolado. Estes dados sugerem um comportamento biológico distinto para o isotipo IgM anti-dsDNA.
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Guerra, Fernanda Garcia. "Anticorpos igg e ige para auto-antígenos nucleares no lúpus eritematoso sistêmico." Instituto de Ciências da Saúde, 2005. http://repositorio.ufba.br/ri/handle/ri/21734.

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CNPq; PPGIM – UFBA
O Lúpus Eritematoso Sistêmico (LES) é uma doença reumática autoimune, classificada como uma reação de hipersensibilidade tipo III, que cursa com exuberante produção de auto-anticorpos de diferentes especificidades, e reação inflamatória crônica. O LES acomete predominantemente pessoas do sexo feminino, com prevalência de 5-50 casos/100.000. Contudo, estudos epidemiológicos têm mostrado diferenças raciais na prevalência e aspectos clínicos e laboratoriais do LES. Diferenças têm sido demonstradas principalmente na freqüência dos auto-anticorpos contra antígenos nucleares extraíveis (ENA, extractable nuclear antigens) e de anticorpos IgG anti-DNA fita dupla. Existem poucos dados sobre a prevalência destes auto-anticorpos em pacientes brasileiros, principalmente usando imunoensaios sensíveis. Assim, neste estudo foram investigadas as freqüências de anticorpos antinúcleo dos isotipos IgG e IgE com especificidade antigênica para as proteínas nucleares SSA, SSB, Sm e U1-RNP, além de anticorpos IgG anti-DNA fita dupla. Soros de 21 pacientes do sexo feminino e de 26 doadoras sadias, idade entre 15-65 anos foram inicialmente triados para a presença de anticorpos antinucleares IgG e IgE através de reação de imunofluorescência indireta (IFI, FAN-IgG e FAN-IgE) com células HEp-2. Anticorpos IgG anti-DNA fita dupla, e IgG e IgE anti-ENA foram investigados por técnica de ELISA (Enzyme-Linked Immunosorbent Assay) indireto, usando fase sólida coberta com os autoantígenos purificados. A concentração sérica de IgE foi determinada por ELISA de captura. Todos os soros dos pacientes com LES (100%) foram reativos no teste de FAN-IgG (mediana do título = 640), enquanto 15/21 (71%) amostras reagiram no teste de FAN-IgE. Anticorpos IgG anti-DNA fita dupla foram detectados em 12/21 (52%) soros (mediana do título = 777 UI/ml, sensibilidade de 35,5%). Quatorze soros reagiram em ELISA-IgG para anticorpos anti-ENA, apresentando as seguintes sensibilidades: anti-RNP = 40%; anti-SSA e anti-Sm = 20%, e anti SSB = 10,5%. Anticorpos IgE anti-ENA foram detectados em sete soros, apresentando o teste de ELISA-IgE uma sensibilidade de 2,5% para 13 anticorpos anti-SSA e SSB, e de 5,3% e 17,6% para anti-Sm e anti-RNP, respectivamente. Os testes de ELISA-IgE para anticorpos anti-Sm e anti-SSA mostraram 100% de especificidade, enquanto uma especificidade de 95% foi encontrada para os testes com anticorpos anti-SSB e anti-RNP. Um aumento na concentração de IgE sérica for observado em 6 (29%) das amostras (mediana = 426 UI/ml), existindo uma correlação positiva entre os títulos de FAN-IgG e IgG anti-RNP (r = 0.796, P = 0.002), entre os títulos de IgG e IgE anti-RNP (r = 0.594, P = 0.0045) e também entre IgE anti-RNP e IgE total (r = 0.680, P = 0.0007). Concluindo, a freqüência de FAN-IgG e anticorpos IgG anti- SSA, SSB e anti-Sm nos pacientes brasileiros com LES concordou com os resultados de outros estudos internacionais, existindo contudo uma forte predominância de anticorpos anti-RNP nestes indivíduos.
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16

Zhang, Jie Wei. "Investigation of IgE and IgG epitopes on ovomucoid using egg-white allergic patients' sera." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ40451.pdf.

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17

Huang, Xinyuan [Verfasser]. "Evolution of serum IgE and IgG antibodies to 35 molecules in childhood / Xinyuan Huang." Berlin : Medizinische Fakultät Charité - Universitätsmedizin Berlin, 2019. http://d-nb.info/1179778111/34.

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18

Kumbaric, Sana, and Lejla Odobasic. "Verifiering av EliA-metoden för analys av reumatoid faktor IgM och anti-CCP IgG." Thesis, Hälsohögskolan, Högskolan i Jönköping, HHJ, Avd. för naturvetenskap och biomedicin, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-44587.

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Reumatoid artrit (RA) är den vanligaste autoimmuna sjukdomen och prevalensen är 0.5-1.0% av populationen i industriella länder. Diagnos av RA sker bland annat genom analys av markörerna reumatoid faktor (RF) samt antikroppar mot cykliskt citrullinerad peptid (anti-CCP). Nefelometrisk metod samt CMIA har båda varit huvudmetoder för markörerna RF och anti-CCP respektive vid utredning av RA på Laboratoriemedicin på Länssjukhuset Ryhov i Jönköping. Införskaffning av instrumentet Phadia 250 har gjort det möjligt att sammanställa analyserna för markörerna på samma enhet. Syftet med studien var att verifiera EliA-metoden för anti-CCP samt RF på instrumentet Phadia 250 för att kunna ersätta nuvarande analysmetoder för de båda RA-markörerna. Bestämning av cut-off, mellanliggande precision, inomserieprecision samt överensstämmelse med tidigare metod utfördes. Totalt 115 prover (70 blodgivare, 30 patientprover och 15 konsekutiva prover) användes. En korrelation utfördes för CMIA respektive nefelometriska metoden med EliA-metoden samt en kategoriöverensstämmelse för nefelometrisk metod, CMIA och EliA-metoden. God korrelation erhölls för anti-CCP mellan CMIA och EliA-metoden (r=0.953, p=0.001) samt för RF mellan nefelometriska metoden och EliA-metoden (r=0.835, p=0.048). Analys av samtliga markörer bör inkluderas som screening för RA för att upptäcka sjukdomen. Metoden EliA tillät analys av båda markörer och verifieringen möjliggjorde övergången till EliA-metoden för Laboratoriemedicin i Jönköping.
Rheumatoid arthritis (RA) is the most common autoimmune disease and the prevalence is 0.5-1.0% among the population in industrial countries. Diagnosis of RA is based partially on detection of the autoantibodies rheumatoid factor (RF) and anti-cyclic citrullinated peptide antibodies (anti-CCP). Nephelometry and CMIA have been the main methods for detection of the antibodies at Laboratoriemedicin at the County Hospital Ryhov in Jönköping. The purpose of this study was to verify the EliA-method for anti-CCP and RF on Phadia 250 in order to replace the current methods with the EliA-method. Determination of cut-off, intermediate precision, within-run precision and consistency with the previous method was performed on a total of 115 samples (70 blood-donors, 30 patient samples and 15 consecutive samples). A correlation between CMIA and the nephelometric method with EliA-method was performed and a cathegorical correspondance was done to assess the accordance between the previous methods with the EliA-method. A good correlation was obtained for anti-CCP between CMIA and the EliA-method (r=0.953, p=0.001) and RF obtained good correlation between the nephelometric method and the EliA-method (r=0.835, p=0.048). Analysis of both markers simultaneously has been recommended and the verification enabled the transition to the EliA-method on Phadia 250 for Laboratoriemedicin in Jönköping.
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19

Keiserman, Briele. "Isotipos IgG e IgM anti-dsDNA em pacientes com l?pus eritematoso sist?mico." Pontif?cia Universidade Cat?lica do Rio Grande do Sul, 2012. http://tede2.pucrs.br/tede2/handle/tede/1686.

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IgG anti-dsDNA antibodies are associated to lupus nephritis. Recent data suggest that IgM isotype is nephroprotector. We evaluated the frequency of IgG anti-dsDNA in patients with Systemic lupus erythemathosus (SLE) and its relation between IgG/IgM proportion and clinical manifestations of the disease. This transversal study included 137 SLE patients according to traditional criteria (92.5% female, 79.5% Caucasian) and 58 SLE individual (93.1% female, 81% Caucasian) selected by positivity for IgG anti-dsDNA. IgG and IgM anti-dsDNA antibodies were detected by Chrithidiae luciliae indirect immunofluorescence with cut point 1/10 dilution. The presence of IgG anti-dsDNA was associated to the presence of hemolytic anemia, leukopenia/lymphopenia and Complement depletion (p<0.001). Of the 58 patients positive for IgG anti-dsDNA 15 were also positive for IgM anti-dsDNA. The group presenting both isotypes showed significant less frequency of active urinary sediment when compared to isolated IgG anti-dsDNA (6.7% versus 34.9%, p=0.046). IgG/IgM proportion distribution evidenced a trend of higher medians in the presence of arthritis and leukopenia/lymphopenia [4 (2-8) versus 1 (1-2), p=0.070 and 4 (3-8) versus 1 (1-4), p=0.066, respectively]. Summarizing, the frequency of IG anti-dsDNA was relevant in our casuistic. Positive subpopulation for both IgG/IgM isotypes anti-dsDNA was less willing to urinary sediment alterations than IgG anti-dsDNA isolated population. These data suggest a distinct biologic behavior for IgM anti-dsDNA.
Anticorpos IgG anti-dsDNA se associam ? ocorr?ncia de nefrite l?pica. Relatos recentes sugerem que o isotipo IgM anti-dsDNA seja nefroprotetor. Avaliamos frequ?ncia de IgG anti-dsDNA em pacientes com l?pus eritematoso sist?mico (LES), e averiguamos a rela??o entre propor??o IgG/IgM anti-dsDNA e manifesta??es cl?nicas da doen?a. O estudo, transversal, incluiu 137 pacientes com LES de acordo com os crit?rios tradicionais (92,5% mulheres, 79,5% ra?a branca) e uma popula??o de 58 casos de LES (93,1% mulheres, 81% ra?a branca) selecionados por positividade para IgG anti-dsDNA. Anticorpos IgG e IgM anti-dsDNA foram detectados por imunofluoresc?ncia indireta com Crithidia luciliae, com ponto de corte na dilui??o 1/10. A presen?a de IgG anti-dsDNA se associou ? presen?a de anemia hemol?tica, leucolinfopenia e deple??o de Complemento (p<0, 001). Dos 58 pacientes com teste positivo para IgG anti-dsDNA, 15 foram tamb?m positivos para o isotipo IgM. O grupo com ambos os isotipos teve frequ?ncia significativamente menor de sedimento urin?rio ativo quando comparado ao grupo com IgG anti-dsDNA isolado (6,7% versus 34,9%, p=0, 046). A distribui??o da propor??o IgG/IgM anti-dsDNA evidenciou tend?ncia de medianas mais elevadas na presen?a de artrite e leucolinfopenia [4 (2-8) versus 1 (1-2), p=0, 070 e 4 (3-8) versus 1 (1-4), p=0, 066, respectivamente]. Em suma, a frequ?ncia de IgG anti-dsDNA foi relevante em nossa casu?stica. A subpopula??o positiva para ambos IgG e IgM anti-dsDNA foi menos propensa a altera??es de sedimento urin?rio do que aquela com IgG anti-dsDNA isolado. Estes dados sugerem um comportamento biol?gico distinto para o isotipo IgM anti-dsDNA.
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20

Mouthon, Luc. "Analyse des repertoires autoreactifs des igm et des igg dans le serum humain normal." Paris 7, 1996. http://www.theses.fr/1996PA077252.

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Les techniques qui permettent d'etudier le repertoire autoreactif exprime des lymphocytes b interessent en regle un nombre limite d'autoantigenes. Le nombre des antigenes testes peut etre augmente en utilisant une technique d'immunoblot. A l'aide d'une technique de western blot quantitatif, nous avons etudie les repertoires des reactivites des anticorps presents dans le serum d'individus sains vis-a-vis d'antigenes proteiques extraits de tissus humains normaux. Le repertoire des igm du sang de cordon etait tres homogene entre les individus, etait restreint a un nombre limite de bandes proteiques et differait significativement du repertoire des igm seriques de jeunes enfants et d'hommes adultes jeunes. Le repertoire auto-reactif des igm seriques d'hommes adultes jeunes, de femmes nullipares, de femmes enceintes, d'enfants et d'individus ages etait relativement homogene entre les individus au sein de chacun des groupes et entre les groupes d'individus. Le repertoire auto-reactif des igg purifiees etait conserve entre les individus sains quelque soit leur age et leur sexe. La reactivite des igg seriques vis-a-vis des antigenes du soi etait plus faible dans le serum total que dans les igg purifiees lorsque celles-ci etaient testees a la meme concentration. La difference d'intensite de reactivite entre les igg purifiees et les igg seriques variait d'un individu a l'autre et d'une bande proteique a l'autre. Des differences interindividuelles marquees dans la reactivite des igg seriques vis-a-vis des antigenes du soi etaient objectivees, et chaque individu avait un profil auto-reactif des igg seriques qui lui etait propre. Les repertoires des igg seriques ne differaient pas significativement entre les enfants, les hommes adultes jeunes, les sujets ages, les femmes nullipares et les femmes enceintes au troisieme trimestre de la grossesse. Le repertoire des igm seriques dirigees vis-a-vis des antigenes exterieurs est limite a un petit nombre d'antigenes, est relativement conserve entre les individus et ne se diversifie pas avec l'age, tandis que le repertoire des reactivites igg dirigees vis-a-vis des antigenes exterieurs varie d'un individu a l'autre et que l'ampleur des differences interindividuelles observees augmente avec l'age. Ces resultats plaident en faveur de l'existence d'une selection positive des lymphocytes b dans la moelle osseuse par un nombre restreint d'antigenes du soi
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21

Ali, Sihaam. "Validering av metod för IgG eller IgM bestämning hos anti-M immuniserade gravida kvinnor." Thesis, Örebro universitet, Institutionen för hälsovetenskaper, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-51327.

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22

Suzuki, Lisandra Akemi. "Resposta imune humoral na neurocisticercose." [s.n.], 2010. http://repositorio.unicamp.br/jspui/handle/REPOSIP/308741.

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Orientador: Claudio Lucio Rossi
Tese (doutorado) - Universidade Estadual de Campinas. Faculdade de Ciencias Medicas
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Resumo: A neurocisticercose (NC) e uma importante causa de doença neurológica em muitos paises em desenvolvimento, incluindo o Brasil. O diagnostico clinico da NC e dificultado pelo polimorfismo e pela não especificidade dos sintomas. As tecnicas de neuroimagem e pesquisa de anticorpos específicos tem contribuído para o diagnostico da NC e uma melhor compreensão dos processos fisiopatológicos dessa infecção. O presente trabalho teve como objetivo avaliar, por meio de técnicas imunoenzimaticas (ELISA), a resposta imune humoral na NC, utilizando como preparações antigênicas o liquido vesicular (LV) e uma fração glicoproteica obtida do extrato bruto de cisticercos de Taenia solium (T. solium) com afinidade por lentil-lectina (fração Gp). Cinquenta e seis amostras de liquido cefalorraquidiano (LCR), 22 de pacientes com NC e 34 de pacientes com outros problemas neurológicos, foram utilizadas para a pesquisa de IgG e suas subclasses, com os seguintes resultados: IgG-LV: 100% de sensibilidade e especificidade; IgG1 -LV: 72,73% de sensibilidade e 100% de especificidade; IgG2-LV: 81,81% de sensibilidade e 100% de especificidade; IgG3-LV: 59,09% de sensibilidade e 97,06% de especificidade; IgG4-LV: 90,91% de sensibilidade e 97,06% de especificidade; IgG-fração Gp: 90,91% de sensibilidade e 97,06% de especificidade; IgG1-fração Gp: 59,09% de sensibilidade e 91,18% de especificidade; IgG2-fração Gp: 68,18% de sensibilidade e 94,12% de especificidade; IgG3-fração Gp: 36,36% de sensibilidade e 100% de especificidade; IgG4-fração Gp: 86,36% de sensibilidade e 100% de especificidade. Quarenta e sete amostras de LCR, 16 de pacientes com NC e 31 de pacientes com outros problemas neurológicos foram utilizadas para a pesquisa de IgE, com os seguintes resultados: IgE-LV e IgE-fração Gp: 93,75% de sensibilidade e 100% de especificidade. Cinquenta e sete amostras de soros, 22 de pacientes com NC, 18 de pacientes com outras infecções e 17 de pessoas presumivelmente sadias, foram utilizadas para a pesquisa da IgG e suas subclasses, IgE, IgA e IgM, com os seguintes resultados: IgG-LV: 100% de sensibilidade e especificidade; IgG1-LV: 86,36% de sensibilidade e 94,28% de especificidade; IgG2-LV: 90,91% de sensibilidade e 97,14% de especificidade; IgG3-LV: 86,36% de sensibilidade e 97,14% de especificidade; IgG4-LV: 100% de sensibilidade e de especificidade; IgG-fração Gp: 95,45% de sensibilidade e 100% de especificidade; IgG1-fração Gp: 63,64% de sensibilidade e 94,28% de especificidade; IgG2-fração Gp: 68,18% de sensibilidade e 97,14% de especificidade; IgG3-fração Gp: 54,54% de sensibilidade e 88,57% de especificidade; IgG4-fração Gp: 90,91% de sensibilidade e 100% de especificidade; IgELV: 90,91% de sensibilidade e 97,14% de especificidade; IgE-fração Gp: 86,36% de sensibilidade e 100% de especificidade; IgA-LV: 54,54% de sensibilidade e 94,28% de especificidade; IgA-fração Gp: 13,63% de sensibilidade e 100% de especificidade. Anticorpos IgM não foram detectados com as preparações de LV e fração Gp. Nossos resultados mostraram que, com ambas as preparações antigênicas, tanto em amostras de LCR quanto em amostras de soros, a maior positividade foi obtida na detecção de anticorpos das classes IgG e IgE, seguida da positividade da IgA. Anticorpos IgM não foram detectados em amostras de soros com reações de ELISA realizadas com LV e fração Gp. Com relação as subclasses da IgG, a IgG4 apresentou, tanto em amostras de LCR como em amostras de soros, valores de positividade e concentração iguais ou superiores as outras subclasses. As reações ELISA realizadas com LV mostraram sensibilidades iguais ou superiores aquelas obtidas com a fração Gp. Considerando a complexidade e o custo final da obtenção da fração Gp, o LV pode ser considerado mais adequado para a pesquisa de anticorpos em amostras de LCR e soros de pacientes com NC.
Abstract: Neurocysticercosis (NC) is an important cause of neurological disease in many developing countries, including Brazil. The clinical diagnosis of NC is hindered by the polymorphism and non-specificity of the symptoms. Neuroimaging techniques and detection of specific antibodies have contributed to the diagnosis of NC and a better understanding of the physiopathological processes of this infection. The purpose of this study was to evaluate the humoral immune response in NC by using immunoenzymatic techniques (ELISA) in which vesicular fluid (VF) and a glycoprotein fraction purified from a crude extract of Taenia solium cysticerci with affinity for lentil-lectin (fraction Gp) were used as antigenic preparations. Fifty-six cerebrospinal fluid (CSF) samples, 22 from patients with NC and 34 from patients with other neurological disorders, were assayed for IgG and IgG subclasses, with the following results: IgG-VF: 100% sensitivity and specificity, IgG1 - VF: 72.73% sensitivity and 100% specificity, IgG2 -VF: 81.81% sensitivity and 100% specificity, IgG3 -VF: 59.09% sensitivity and 97.06% specificity, IgG4 -VF: 90.91% sensitivity and 97.06% specificity, IgG-fraction Gp: 90.91% sensitivity and 97.06% specificity, IgG1- fraction Gp: 59.09% sensitivity and 91.18% specificity, IgG2-fraction Gp: 68.18% sensitivity and 94.12% specificity, IgG3 -fraction Gp: 36.36% sensitivity and 100% specificity, IgG4 - fraction Gp: 86.36% sensitivity and 100% specificity. Forty-seven CSF samples, 16 from patients with NC and 31 from patients with other neurological disorders, were assayed for IgE, with the following results: IgE-VF and IgE-fraction Gp: 93.75% sensitivity and 100% specificity. Fifty-seven serum samples, 22 from patients with NC, 18 from patients with other infections and 17 from presumably healthy individuals, were assayed for IgG, IgG subclasses, IgE, IgA and IgM, with the following results: IgG-VF: 100% sensitivity and specificity, IgG1-VF: 86.36% sensitivity and 94.28% specificity, IgG2 -VF: 90.91% sensitivity and 97.14% specificity, IgG3 -VF: 86.36% sensitivity and 97.14% specificity, IgG4 -VF:100% sensitivity and specificity, IgG-fraction Gp: 95.45% sensitivity and 100% specificity, IgG1- fraction Gp: 63.64% sensitivity and 94.28% specificity, IgG2 -fraction Gp: 68.18% sensitivity and 97.14% specificity, IgG3 -fraction Gp: 54.54% sensitivity and 88.57% specificity, IgG4 - fraction Gp: 90.91% sensitivity and 100% specificity, IgE-VF: 90.91% sensitivity and 97.14% specificity, IgE-fraction Gp: 86.36% sensitivity and 100% specificity, IgA-VF: 54.54% sensitivity and 94.28% specificity, IgA-fraction Gp: 13.63% sensitivity and 100% specificity. No specific IgM antibodies were detected with VF and fraction Gp antigenic preparations. These results show that with the two antigenic preparations the highest positivity in CSF and serum samples was obtained for IgG and IgE antibodies, followed by positivity for IgA. No IgM antibodies were detected in serum samples assayed with VF and fraction Gp. With regard to IgG subclasses, IgG4 positivity and concentration in CSF and serum samples were higher than or equal to the other subclasses. ELISA reactions done with VF showed equal or higher sensitivities than those obtained with fraction Gp. Considering the complexity and high cost of obtaining fraction Gp, VF could be more suitable for detecting specific antibodies in CSF and serum samples from patients with NC.
Doutorado
Ciencias Biomedicas
Doutor em Ciências Médicas
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23

Chicault, Madeleine. "Interaction du lévamisole avec l'albumine et les immunoglobulines IgC, igA du sérum humain in vitro." Université Joseph Fourier (Grenoble), 1986. http://www.theses.fr/1986GRE18009.

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24

Peters, Adam A. "Influence of antimannan IgA on antimannan IgG mediated complement activation and phagocytosis of Candida albicans." Thesis, California State University, Long Beach, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10195880.

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Candida albicans is an opportunistic yeast pathogen and can cause life-threatening systemic candidiasis. The cell surface of C. albicans is enriched with mannan that is resistant to complement activation in the absence of antimannan antibodies. To better appreciate antimannan antibody functions in human immunity, our laboratory constructed the human recombinant antimannan Fc-free fragment M1 Fab. M1 Fab was subsequently converted to full-length human recombinant antimannan antibodies: M1g1 (IgG1), M1a1 (IgA1), M1a2 (IgA2). Each retains the identical M1 Fab binding region but differ in the isotype. Previously, our laboratory has established that M1 Fab can increase C3b deposition to C. albicans via the alternative pathway and that M1g1 activates the alternative and classical pathways of complement and increases phagocytosis of C. albicans by murine macrophages. The purpose of this study was to assess the influence of M1a1 and M1a2 on M1g1 mediated complement activation and phagocytosis of C. albicans. M1a1 or M1a2 was found unable to promote C3b-deposition to C. albicans as determined by flow cytometry and immunofluorescence microscopy. The formation of the alternative pathway convertase on C. albicans was promoted by M1 Fab but not by M1-Fab contained within M1a1 or M1a2. Additionally, M1g1 mediated C3b deposition was inhibited by M1a1 or M1a2 in a dose-dependent manner. Finally, M1a1 or M1a2 each significantly increased phagocytosis of C. albicans (P <0.001) by human neutrophils independent of serum. The presence of M1a1 or M1a2 did not inhibit M1g1-mediated phagocytosis, indicating a redundant function of IgG1 and IgA antibodies in opsonophagocytosis. Thus, human antimannan IgA subclass variants hinder complement activation while increasing neutrophil phagocytosis of C. albicans. These results contribute to a more complete understanding of the role of serum IgA in host immunity.

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Garbatini, Elisa <1982&gt. "Valutazione clinica, clinicopatologica e quantificazione di IgG e IgM in corso di leishmaniosi canina: studio retrospettivo." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2012. http://amsdottorato.unibo.it/4856/.

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La leishmaniosi canina (LCan) causata da Leishmania infantum rappresenta un’importante zoonosi in molte aree del mondo ed il cane rappresenta il principale reservoir del parassita per l’uomo. Il tipo di risposta immunitaria che i soggetti colpiti mettono in atto condiziona fortemente la progressione della malattia: animali che non sviluppano un’adeguata risposta immunitaria cellulo-mediata mostrano la sintomatologia clinica nonostante abbiano una forte ma inefficace risposta umorale che contribuisce al peggioramento della sintomatologia clinica. L’obbiettivo dello studio è stato quello valutare da un punto di vista descrittivo il segnalamento, i segni clinici e clinicopatologici dei pazienti affetti da leishmaniosi portati in visita presso il Dipartimento di Scienze Mediche Veterinarie nel periodo compreso da Gennaio 2002 a Marzo 2012 con particolare attenzione sull’impatto della patologia renale e dell’anemia nel quadro clinico della LCan. In base ai risultati ottenuti è stato possibile affermare che la leishmaniosi canina è una patologia relativamente frequente nella nostra realtà clinica universitaria e che presenta caratteristiche cliniche e clinicopatologiche simili a quelle riportate in letteratura. I nostri risultati preliminari suggeriscono che in questa malattia il coinvolgimento renale e le conseguenze sistemiche che ne derivano possono essere predominanti a livello clinico e laboratoristico. La gravità del quadro clinico appare associata in maniera significativa all’entità della risposta umorale e del successivo coinvolgimento glomerulare nel contesto di una risposta infiammatoria sistemica cronica. Successivamente, sono state misurate le concentrazioni di IgG ed IgM in corso di follow-up in alcuni dei soggetti inclusi nello studio e sottoposti a differenti trattamenti anti-leishmania. Dai risultati preliminari ottenuti nel nostro lavoro è stato possibile affermare che in corso di trattamento le concentrazioni di tali immunoglobuline subiscono una riduzione progressiva confermando pertanto l’efficacia del trattamento anti-leishmania non solo nella remissione della sintomatologia clinica ma anche nel ripristino della normale risposta umorale.
Canine leishmaniasis (LCan) caused by Leishmania infantum is an important zoonosis in many parts of the world and the dog is the main reservoir of the parasite to humans. The type of immune response that those affected put in place strongly influences the progression of the disease: the animals do not develop adequate cell-immune mediated response show clinical symptoms despite having a strong but ineffective humoral response that contributes to worsening the clinical symptoms . The objective of this study was to evaluate a descriptive standpoint, signaling, clinical and clinicopathological signs of leishmaniasis patients taken to visit at the Department of Veterinary Medical Sciences during the period from January 2003 to March 2012 with particular attention to the impact of kidney disease and anemia in the clinical picture of LCan. Based on the results obtained it was possible to say that leishmaniasis is a relatively common disease in our clinical practice and that the clinical features and clinicopathological features are similar to those reported in the literature. Our preliminary results suggest that in this disease, renal involvement and systemic consequences can be predominant in the clinical and laboratory findings. The severity of the clinical picture is significantly associated with the extent of the humoral response and subsequent glomerular involvement in the context of a chronic systemic inflammatory response. Subsequently, we measured the concentrations of IgG and IgM in the course of follow-up in some of the subjects included in the study and subjected to different anti-Leishmania treatment. By preliminary results obtained in our work it has been possible to state that in the course of treatment, the concentrations of these immunoglobulins undergo a progressive reduction thus confirming the effectiveness of anti-Leishmania treatment not only in the remission of clinical symptoms but also in the restoration of normal humoral response.
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26

Rodrigues, Jaqueline Polizeli. "Testes fluorimétricos na sorologia da toxoplasmose humana: detecção simultânea de anticorpos de IgG e IgM específicos." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/99/99131/tde-17032014-115211/.

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A toxoplasmose, protozoose disseminada de baixa morbidade, apresenta número significativo de doença ocular, congênita ou do sistema nervoso central. O diagnóstico é sorológico por diferentes testes, mas limiares baixos e variação individual levam a frequentes problemas. Novos imunoensaios fluorescentes de fase sólida (FLISA) usam a quantificação direta de anticorpos. Aqui, desenvolvemos um FLISA multiplex (FLISAm) para a detecção simultânea de anticorpos IgG e IgM contra Toxoplasma gondii. Após padronização, a eficiência do FLISAm com conjugados comerciais foi feita inicialmente de forma isolada para cada imunoglobulina em 140 amostras de soro de universitários previamente analisadas pelo ELISA IgG/IgM. FLISA IgG mostrou boa concordância (Kappa=0,7088), com sensibilidade de 83,3% e especificidade de 94,2%, enquanto FLISA IgM apresentou boa concordância (K=0,6026), menor sensibilidade de 55,5% e igual especificidade de 98,4%. Foram produzidos novos conjugados fluorescentes de maior especificidade e seu desempenho no FLISAm foi validado em 24 amostras e sua eficiência foi avaliada em 120 amostras conhecidas de soro de gestantes. FLISAm mostrou excelente concordância, tanto para a detecção de anticorpos IgG (K=0.8837, sensibilidade=100,0%, especificidade=87,5%), quanto para a detecção de anticorpos IgM (K=0,9187, sensibilidade=100%, especificidade=99,1%) com excelente reprodutibilidade. O teste desenvolvido é rápido, econômico, de fácil execução, alto rendimento e que pode ser utilizado como método de triagem de soroconversão em mulheres grávidas, útil em aplicações de grande número de amostras como o cuidado pré-natal.
Toxoplasmosis, a disseminated low morbidity protozoan disease, presented significant numbers of affected people, mainly ocular disease, fetal infections or encephalitis in immune deficient patients. Serology is the main diagnosis with commercial antibody assays, but individual variation or low thresholds cause many inconsistencies. New solid phase immunofluorescence assays (FLISA) allows direct antibody quantification in microplates. Here, we developed a multiplex FLISA (FLISAm) for simultaneous detection of IgG and IgM anti-Toxoplasma gondii antibodies. After standardization, the efficiency of this method was initially analyzed in isolated FLISA for each immunoglobulin with commercial conjugates in 140 serum samples of the students previously screened by IgG/IgM ELISA. IgG FLISA showed good concordance (Kappa=0.7088), 83,3% sensitivity and 94,2% specificity, while IgM FLISA also showed good concordance (Kappa=0,6026), lower 55,5% sensitivity and similar 98,4% specificity. New higher efficiency conjugated were prepared and tested in 120 serum samples of the pregnant woman in a same well conjunct IgG/IgM FLISAm. We also validate the FLISAm in 24 serum samples. Compared to isolated ELISA IgG/IgM, FLISAm demonstrated excellent concordance for IgG (Kappa=0.8837; sensitivity=100%; specificity=87,5%,) and IgM (Kappa=0,9187; sensitivity=100%; specificity=99,1%), with excellent reproducibility. The standardized FLISAm is quick, inexpensive, easily performed and high throughput and the assay can be used for screening serum conversion in pregnant women, useful in large numbers applications as antenatal care.
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27

Dupuy, Michèle. "Intérêt des IgE et de IgA anti-toxoplasma gondii dans le diagnostic sérologique de la toxoplasmose." Bordeaux 2, 1993. http://www.theses.fr/1993BOR23036.

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28

Aubert, Dominique. "Nouvelles approches diagnostiques en parasitologie-mycologie : caracterisation des isotypes specifiques igm, iga et ige dans la toxoplasmose, la candidose et les alveolites allergiques extrinseques ; application de la polymerase chain reaction au diagnostic de la toxoplasmose." Reims, 1996. http://www.theses.fr/1996REIMM201.

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29

Zimmer, Anja [Verfasser], and Rafl [Akademischer Betreuer] Müller. "Futtermittel-spezifisches IgG und IgE vor und nach Eliminationsdiäten bei allergischen Hunden / Anja Zimmer. Betreuer: Rafl Müller." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2012. http://d-nb.info/1027066127/34.

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30

Schmidt, Carolin [Verfasser], Harald [Akademischer Betreuer] Kolmar, and Jörg [Akademischer Betreuer] Schüttrumpf. "Functional characterization of a new IgM- and IgA-enriched immunoglobulin preparation / Carolin Schmidt ; Harald Kolmar, Jörg Schüttrumpf." Darmstadt : Universitäts- und Landesbibliothek, 2020. http://d-nb.info/122361901X/34.

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31

Dantas, Val?ria Cristina Ribeiro. "IgA s?rica, secretora, IgE total e estado nutricional em crian?as com infec??es por enteroparasitas." Universidade Federal do Rio Grande do Norte, 2003. http://repositorio.ufrn.br:8080/jspui/handle/123456789/13438.

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Infections for intestinal parasites are one of the main morbidade causes in humans and, its relationships with socioeconomic levels and hygiene conditions in countries in development are already very established. Many works, even so, they are being accomplished to elucidate the complex interactions among nutrition, these infections and answer imunol?gica, because it is seen that malnutrition commits the immunity increasing the susceptibilidade for infectious diseases and these for its time can harm the state human nutricional. It is known that sponge helm?nticos they stimulate synthesis of IgE so much policlonal as specific for the same ones and that IgA secretora, main imunoglobulina of defense of the mucous ones, can act against protozoa as the Giardia lamblia and against helmintos as Trichuris tichiura and Strongyloides stercorales. Some studies show that the malnutrition energy prot?ica influences in the production of these answers, but some authors show results divergentes. In this work it was evaluated the levels of total IgE, IgA s?rica and secretora, contagem of sanguine eosin?filos, levels of proteins s?ricas and state nutricional, in 103 children of low socioeconomic level, to discover a correlation between those and infection for enteroparasitas. They participated in the study children of both sexes, with age of 3 to 6 years, visitors of the same creche and residents in a neighborhood with precarious hygiene conditions and basic saneamento, in the city of Christmas. The obtained results showed that the faulty environmental and socioeconomic conditions favored to a high infection frequency for enteroparasitas, mainly Trichuris trichiura and Ascaris lumbricoides between the helmintos and Endolimax sleep and Gi?rdia lamblia among the protozoa. Light malnutrition without deficit prot?ico was observed in 30% of the children, which didn't also present significant deficiencies of IgA s?rica and secretora. The sponged children
Infec??es por parasitas intestinais s?o uma das principais causas de morbidade em humanos e, suas rela??es com n?veis s?cio-econ?micos e condi??es de higiene em pa?ses em desenvolvimento j? s?o bem estabelecidas. Muitos trabalhos, por?m, est?o sendo realizados para elucidar as complexas intera??es entre nutri??o, estas infec??es e resposta imunol?gica, pois ? visto que desnutri??o compromete a imunidade aumentando a susceptibilidade para doen?as infecciosas e estas por sua vez podem prejudicar o estado nutricional humano. Sabe-se que parasitas helm?nticos estimulam s?ntese de IgE tanto policlonal como espec?fica para ant?geno dos mesmos e que IgA secretora, principal imunoglobulina de defesa das mucosas, pode atuar contra protozo?rios como a Giardia lamblia e contra helmintos como Trichuris tichiura e Strongyloides stercorales. Alguns estudos mostram que a desnutri??o energ?tico prot?ica influencia na produ??o destas respostas, mas outros autores mostram resultados divergentes. Neste trabalho avaliou-se os n?veis de IgE total, IgA s?rica e secretora, contagem de eosin?filos sangu?neos, n?veis de prote?nas s?ricas e estado nutricional, em 103 crian?as de baixo n?vel s?cio-econ?mico, para se averiguar uma correla??o entre esses e infec??o por enteroparasitas. Participaram do estudo crian?as de ambos os sexos, com idade de 3 a 6 anos, freq?entadoras da mesma creche e residentes em um bairro com prec?rias condi??es de higiene e saneamento b?sico, na cidade do Natal. Os resultados obtidos mostraram que as deficientes condi??es ambientais e s?cio-econ?micas favoreceram a uma alta freq??ncia de infec??o por enteroparasitas, principalmente Trichuris trichiura e Ascaris lumbricoides entre os helmintos e Endolimax nana e Gi?rdia lamblia entre os protozo?rios. Desnutri??o leve sem d?ficit prot?ico foi observada em 30% das crian?as, as quais tamb?m n?o apresentaram defici?ncias significativas de IgA s?rica e secretora. As crian?as parasitadas apresentaram eosinofilia sangu?nea e n?veis s?ricos de IgE total elevados confirmando a importante participa??o das mesmas na resposta imune contra helmintos. Pode-se, portanto, sugerir que as crian?as apesar de poliparasitadas n?o estavam com sua resposta imune de mucosa contra parasitas, prejudicada, provavelmente por ainda n?o estarem intensamente infectados, como observado na contagem de ovos por grama de fezes e tamb?m por n?o terem seu estado nutricional gravemente comprometido
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32

Broult, Julien. "La sérologie du virus Epstein-Barr : comparaison du test enzygnost anti-EBV IgG/IgM avec l'immunofluorescence indirecte." Bordeaux 2, 1993. http://www.theses.fr/1993BOR23097.

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33

Schmidt, Carolin Verfasser], Harald [Akademischer Betreuer] Kolmar, and Jörg [Akademischer Betreuer] [Schüttrumpf. "Functional characterization of a new IgM- and IgA-enriched immunoglobulin preparation / Carolin Schmidt ; Harald Kolmar, Jörg Schüttrumpf." Darmstadt : Universitäts- und Landesbibliothek, 2020. http://d-nb.info/122361901X/34.

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34

Schmidt, Carolin Verfasser], Harald [Akademischer Betreuer] [Kolmar, and Jörg [Akademischer Betreuer] Schüttrumpf. "Functional characterization of a new IgM- and IgA-enriched immunoglobulin preparation / Carolin Schmidt ; Harald Kolmar, Jörg Schüttrumpf." Darmstadt : Universitäts- und Landesbibliothek, 2020. http://d-nb.info/122361901X/34.

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35

Diehl, Veronika. "Vergleich von vier ELISAs für IgA Antikörper gegen humane Gewebetransglutaminase und IgA und IgG Anti-Gliadin Antikörper und Validierung eines kommerziellen Tests zum Nachweis von sekretorischen IgA Antikörpern gegen humane Gewebetransglutaminase und Gliadin im Stuhl." Diss., lmu, 2009. http://nbn-resolving.de/urn:nbn:de:bvb:19-100094.

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36

Li, Shi. "Funktion von Iga [Igalpha], Igb [Igbeta] und SHIP in der FccRIIb1-vermittelten [FcgammaRIIb1-vermittelten] Signaltransduktion in B-Zellen." [S.l.] : [s.n.], 2001. http://deposit.ddb.de/cgi-bin/dokserv?idn=963048694.

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37

ADIB-CONQUY, MINOU. "Etude des igm anti-f(ab)2 participant a la regulation des autoanticorps naturels igg chez la souris." Paris 7, 1993. http://www.theses.fr/1993PA077002.

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Dans ce travail, nous avons montre que des igm presentes dans le serum de souris normales, en interagissant avec les fragments f(ab)2 des igg, inhibaient leur fixation sur les autoantigenes, ceci probablement par des interactions de type idiotypique. Contrairement, a ce qui a ete observe chez la souris normale, cette regulation des igg semble defectueuse dans certains cas pathologiques: lors de maladies autoimmunes comme le lupus ou apres infection par un parasite. Par la suite, nous avons obtenu des anticorps monoclonaux, igm anti-f(ab)2 et autoanticorps igg polyreactifs, qui presentent des reactivites tres similaires a celles des anticorps seriques. Ces resultats confirment ce que nous avons precedemment observe dans le serum de souris normales. Enfin, nous avons determine la sequence nucleotidique d'une igm anti-f(ab)2 et l'avons comparee avec une igm naturelle utilisant les memes segments vh djh et vl jl mais qui contrairement a notre anticorps est polyreactive. Ces deux igm presentent uniquement des differences en acides amines sur la chaine lourde. La plus grande difference se situe dans le cdr 3 suggerant qu'il peut jouer un role important dans la reactivite de ces anticorps et apporte quelques hypotheses quant a la relation entre la structure d'un anticorps et sa multireactivite
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38

Dalloul, Zeinab. "Mécanistique de la commutation de classe des immunoglobulines et production de classes rares (IgE, IgA2 et pseudo-IgG)." Thesis, Limoges, 2018. http://www.theses.fr/2018LIMO0048/document.

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Le processus de la commutation de classe ou commutation isotypique (CSR) des gènes d’immunoglobulines caractérise les cellules de la lignée B et implique principalement les régions switch précédant les gènes constants au sein du locus IgH. Des jonctions entre la région switch donneuse Sμ et celle acceptrice Sx sont crées pendant ce processus. Plusieurs études ont démontré que le destin des cellules de la lignée B était largement modulé en fonction de la classe de l’immunoglobuline qu’elles produisent et en particulier selon les signaux transmis par leur BCR (qui peuvent par exemple pour la classe IgE, comporter des signaux pro-apoptotiques). Nous avons utilisé plusieurs modèles visant à l’étude de la physiologie et de la mécanistique du switch vers différentes classes de BCR et d’immunoglobulines peu exprimées. Nous avons cherché à forcer l’expression de l’isotype IgA2 grâce à un modèle transgénique dédié, dans le but d’approfondir les spécificités du signal BCR transduit par cet isotype en comparaison avec le BCR IgA1. En outre, et d’une façon très intéressante, nous avons découvert l’existence (jusqu’ici ignorée et masquée par les 4 autres sous-classes plus abondantes) d’une cinquième sous-classe d’IgG humaine, l’IgG5 qui est codé par un gène jusqu’ici faussement classifié pseudo-gène. Ainsi nous avons étudié les modalités d’expression du gène correspondant après un switch non-canonique,le répertoire normal des IgG5, leur représentation parmi les IgG humaines monoclonales ainsi que leurs fonctions immunitaires grâce à un IgG5 fabriquée artificiellement portant une activité anti-CD20 humaine. Enfin, nous avons testé des produits pharmaceutiques (RHPS4 : stabilisant des structures G-quadruplex au niveau d’ADN et JQ1 : inhibiteur des facteurs de transcription à bromodomaines), montrant leur capacité à retarder ou inhiber la commutation de classe in vitro mais aussi in vivo dans des souris allergiques
The process of class switch recombination (CSR) or isotypic switching of immunoglobulin genes characterizes the B cell lineage and primarily involves switch regions preceding the constant genes within the IgH locus. Junctions between donor switch region Sμ and acceptor Sx are generated during this process. Several studies have shown that the fate of B cells is largely modulated according to the class of immunoglobulin they produce and in particular the signals transmitted by their BCR « for example for IgE, BCRs can combine proapoptotic signals. We used several relevant mouse models to study the physiological aspect and the B cell compartment after switching to IgA2 (a dedicated transgenic model expressing IgA2) since IgA2 conveys a membrane signal different from tht of IgA1. In addition, we tested two pharmaceuticals drugs(RHPS4: stabilizer of G-quadruplex structures at the DNA level and JQ1: inhibitor of bromodomain proteins) showed their ability to delay or inhibit class switching towards IgE in vitro but also in vivo in allergic mice. Interestingly, we also demonstrated the existence (till now ignored and maybe masked by the other 4 more abundant IgG subclasses) of a fifth subclass of human IgG, IgG5 which is encoded by a gene classified as a pseudo-gene. We studied the expression modalities of the corresponding gene after a non-canonical switch, the normal IgG5 repertoire, their representation among the monoclonal human IgGs as well as their immune functions through an artificially synthesited IgG5 with human anti-CD20 activity
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39

Layward, Lorna. "IgA in IgA nephropathy." Thesis, University of Leicester, 1992. http://hdl.handle.net/2381/34129.

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IgA in IgA Nephropathy Lorna Layward IgA nephropathy is a common glomerulonephritis of unknown pathogenesis, characterised by the presence of IgA within the glomerular mesangium. The predominant subclass of deposited IgA is known to be of the subclass IgA1 and is, at least in part, polymeric. IgA subclass measurements showed that raised serum IgA levels were restricted to the IgAl subclass, and that increased IgA levels were only observed in the systemic (not mucosal) compartment of the IgA immune system. In vitro production of IgA by peripheral blood lymphocytes was increased, with a concomitant decrease in IgG production. The response to systemic challenge with tetanus toxoid demonstrated a bias towards serum IgA1 antibody production; an enhanced circulating antigen-specific B cell response; and a positive saliva response where none was observed in controls. Serum polymeric IgA antibody production in response to systemic antigen challenge was significantly elevated in IgA nephropathy. Patients with IgA nephropathy were more likely to have an IgG subclass antibody deficiency than controls, showing dysregulation of other isotypes besides IgA. The affinity of serum IgA antibodies produced was lower than controls, while IgG affinity was normal. The production of low affinity IgA antibodies may result in the formation of nephritogenic immune complexes and explain the predominance of IgA within the glomerular mesangium. Gut permeability was normal in IgA nephropathy, and the response to mucosal antigen challenge did not differ from controls except for a higher antigen-specific in vitro B cell response. These results suggest an enhanced overlap of circulating IgA immunocompetent IgA B cells between the two sites in IgA nephropathy, regardless of the route of antigen administration. These data show abnormalities of mainly systemic IgA lending support to the hypothesis that the source of IgA overproduction is the systemic rather than the mucosal compartment of the IgA immune system.
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40

Thomas, Matthew James. "A novel mechanism of CD8 mediated regulation of murine IgE : the role of IFN a and Il 12 explained." Thesis, King's College London (University of London), 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.271569.

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41

Ghouma, S. M. "An investigation of the function of human IgM and IgG antibodies recognizing P. falciparum erythrocyte membrane protein 1 (PfEMP1)." Thesis, University of Liverpool, 2018. http://livrepository.liverpool.ac.uk/3022830/.

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42

Assolini, João Paulo. "Diferentes padrões de reconhecimento de antígenos de Paracoccidioides brasiliensis E Paracoccidioides lutzii por IGE e IGG na paracoccidioidomicose humana." Universidade Estadual de Londrina. Centro de Ciências Biológicas. Programa de Pós-Graduação em Patologia Experimental, 2016. http://www.bibliotecadigital.uel.br/document/?code=vtls000204554.

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Paracoccidioidomicose (PCM) é uma das micoses sistêmicas mais importantes da América Latina, causada pelos fungos dimórficos Paracoccidioides brasiliensis (S1, PS2, PS3) e Paracoccidioides lutzii, na qual a gravidade da doença está relacionada com resposta Th2 e altos níveis de Imunoglobulina E (IgE). O presente estudo teve como objetivo avaliar o padrão de reconhecimento/reatividade de IgG e IgE séricos aos antígenos de P. brasiliensis S1 (B339), PS2 (LDR3) e P. lutzii (LDR2) na PCM humana crônica. Foi realizado Immunoblotting para verificar quais os componentes imunogênicos presentes no antígeno solúvel total (CFA) e antígeno somático (AS) de P. brasiliensis (S1 e PS2) e P. lutzii que são reconhecidos por IgG e IgE na PCM humana. A reatividade de IgG e IgE séricos de pacientes com PCM crônica (n = 24) foram analisados por Ensaio Imunoenzimático indireto (ELISA), utilizando antígeno solúvel total (CFA), fração de alta massa molecular (hMM) e gp70 de P. brasiliensis (S1 e PS2) e P. lutzii. Nos resultados de Immunoblotting foram observadas diferenças no reconhecimento de componentes imunogênicos de antígenos totais das três cepas, por IgG e IgE. As principais diferenças observadas por IgG foram: a ausência de gp43 em P. lutzii (LDR2), banda de gp70 intensamente corada em CFA de P. lutzii e presença de antígeno de alta MM e ausência de banda hMM difusa em P. lutzii. A IgE reconheceu gp70 e antígeno de ~30 kDa em CFA de P. lutzii, sugerindo que os mesmos não são exclusivamente intracelulares. Por ELISA, IgG de pacientes com PCM apresentaram maior reatividade para CFA e hMM de P. brasiliensis S1 em relação ao P. lutzii (p < 0.05), no entanto houve maior reatividade para gp70 de P. lutzii e P. brasiliensis PS2 do que S1 (p < 0.05). Anticorpos IgE apresentaram maior reatividade para CFA de P. brasiliensis do que P. lutzii (p < 0.05), diferente com hMM, com maior reatividade para P. lutzii do que P. brasiliensis S1 (p < 0.05). Em conclusão, o padrão de reconhecimento de antígeno por IgG e IgE difere de acordo com Paracoccidioides sp. Antígeno de hMM devido à maior reatividade para IgE, e antígenos de ~70 kDa e ~30 kDa produzidos, liberados e reconhecidos por IgE podem ser os principais fatores de virulência de P. lutzii, sugerindo um potencial de induzirem uma resposta Th2.
Paracoccidioidomycosis (PCM) is one of the most important systemic mycosis in Latin America, caused by fungi dimorphic Paracoccidioides brasiliensis (S1, PS2, PS3) and Paracoccidioides lutzii, in which the severity of disease is related to Th2 response and high levels of immunoglobulin E (IgE). The present study aimed to evaluate the pattern recognition/reactivity of IgG and IgE sera to P. brasiliensis S1 (B339), PS2 (LDR3) and P. lutzii (LDR2) antigens in chronic human PCM. Immunoblotting was performed to verify which the immunogenic components present in the total soluble antigen (CFA) and somatic antigen (SA) from P. brasiliensis (S1 and PS2) and P. lutzii that are recognized by IgG and IgE in the human PCM. The reactivity of IgG and IgE sera from patients with chronic PCM (n = 24) were analyzed by indirect enzyme linked immunosorbent assay (ELISA), using total soluble antigen (CFA), high molecular weight fraction (hMM) and gp70 from P. brasiliensis (S1 and PS2) and P. lutzii. In the results of immunoblotting were observed differences in the recognition of immunogenic components of total antigens of the three strains, by IgG and IgE. The main differences evidenced by IgG were: the absence of gp43 in P. lutzii (LDR2), gp70 band intensely stained in CFA from P. lutzii, and presence of hMM antigen and absence of diffuse hMM band in P. lutzii. IgE recognized gp70 and ~30 kDa antigen in CFA from P. lutzii, suggesting that they are not exclusively intracellular. By ELISA, IgG from PCM patients showed higher reactivity to CFA and hMM from P. brasiliensis S1 in relation to P. lutzii (p < 0.05), however was higher reactivity for gp70 from P. brasiliensis PS2 and P. lutzii than S1 (p < 0.05). IgE antibodies had higher reactivity to CFA from P. brasiliensis than P. lutzii (p < 0.05), different for hMM, with higher reactivity reactive to P. lutzii than P. brasiliensis S1 (p <0.05). In conclusion, the antigen recognition pattern by IgG and IgE differs according Paracoccidioides sp. hMM antigen due to higher reactivity to IgE, and ~70 kDa and ~30 kDa antigens produced, released and recognized by IgE can be the main virulence factors of P. lutzii, suggesting a potential to induce a Th2 response.
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43

Allen, Alice. "IgA glycosylation in IgA nephropathy." Thesis, University of Leicester, 1995. http://hdl.handle.net/2381/35028.

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IgA nephropathy (IgAN) is a common glomerulonephritis characterised by deposition of IgA1 in the glomerular mesangium The underlying abnormality lies within the IgA system rather than the kidney, and modest irregularities of IgA biology have been described, but the mechanisms involved in IgA1 deposition and glomerular injury remain elusive. A few reports have suggested an abnormality of the carbohydrate component of IgA1 in IgAN. These studies sought to confirm and further characterise the putative glycosylation defect and to identify its biochemical basis. Lectin binding assays were developed and used to analyse the N- and O-linked glycans of IgA1 in IgAN and controls. No gross abnormality of N-glycosylation was detected in IgAN, though these studies were subject to technical limitations. IgA1 in IgAN displayed significantly increased binding to lectins with affinity for O-linked N-acetylgalactosamine (Ga1NAc) as compared to controls. One explanation for this finding is reduced terminal galactosylation of the O-linked sugars of IgA1. A novel assay was developed to measure the functional activity of alpha1,3 galactosyltransferase (alpha1,3GT), the enzyme responsible for O-galactosylation, in cell lysates. In IgAN, peripheral blood B cells appeared to show significantly lower alpha1,3GT activity than controls, and this was inversely proportional to Ga1NAc expression of serum IgA1 as measured by lectin binding. These studies confirm an abnormality of O-linked glycosylation of serum IgA1 in IgAN, which may be attributed to low B cell alpha1,3GT activity. Altered O-glycosylation of IgA1 may be relevant to the pathogenesis of IgAN.
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44

Wu, Yongjian. "Molecular analysis of the signaling and transport differences of the B cell antigen receptors of the IgM and IgD classes." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ28088.pdf.

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45

Marquez, Audrey de Souza. "Dosagem de imunoglobulinas IgG e IgE totais e específicas, proteínas séricas, HDL colesterol e imunocomplexos na paracoccidioidomicose aguda e crônica." Universidade Estadual de Londrina. Centro de Ciências Biológicas. Programa de Pós-Graduação em Microbiologia, 2007. http://www.bibliotecadigital.uel.br/document/?code=vtls000125817.

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A Paracoccidioidomicose (PCM), causada pelo fungo dimórfico Paracoccodioides brasiliensis, apresenta duas formas clínicas distintas: forma aguda (AF) e forma crônica (CF). A AF ocorre principalmente em indivíduos jovens e é mais grave e rara enquanto que a CF acomete, sobretudo, homens adultos e em geral de forma menos grave. Os casos de maior gravidade relacionam-se com a depressão da resposta imune celular, a ativação policlonal de células B e o desvio da resposta imune para Th2. Diversos componentes solúveis liberados pelo fungo, como a gp-43, assim como a presença de imuno complexos circulantes tem sido associados ao desvio de resposta e maior gravidade da PCM. O objetivo do presente trabalho foi determinar marcadores moleculares de diferenciação entre as duas formas da doença. Considerando as dificuldades em se estabelecer rotinas sorológicas simples, rápidas e com antígenos padronizados para o diagnóstico laboratorial ambulatorial da PCM e acompanhamento de tratamento, realizou-se inicialmente a correlação das alterações observadas nas frações de eletroforese de proteínas com a dosagem de IgG e IgE totais e HDL colesterol. Foram analisadas 30 amostras de soros de pacientes com CF PCM, 12 de AF PCM e 44 de doadores normais (NHS) por eletroforese e por ensaio imunoenzimático (ELISA). Na segunda etapa foram investigados os níveis séricos de IgG e IgE total e específicas, IC IgG-IgE e IC IgG-gp43 através de ELISA em soro de pacientes com CF PCM (22), AF PCM (12) e NHS (29). Os resultados demonstraram alterações nas frações de proteínas e que existem correlações positivas entre a fração beta e gama-globulinas ou alfa-1 globulinas, gama e alfa-1 globulinas e entre gama-globulinas e níveis de IgE total. Concluímos pelo trabalho que existem diferenças entre as duas formas por alterações nas frações alfa-1 e gama globulinas e que existe diferença na interpretação dos resultados de albumina quando analisados em porcentagem ou níveis absolutos e que o HDL colesterol não contribui para as elevações observadas na fração alfa-1 globulinas na PCM. Os resultados também confirmam que os níveis séricos elevados de IgG e IgE total e IgG e IgE específicas e IC IgG-gp43 estão associados com a forma mais grave da doença e este trabalho introduz pela primeira vez a presença de IgG-IgE IC diferenciando a forma aguda da PCM da crônica.
Paracoccidioidomycosis (PCM), caused by the dimorphic fungus Paracoccidioides brasiliensis, presents two different clinical forms: acute form (AF) and chronic form (CF). The AF occurs particularly in young individuals and is more severe and rare while the CF involves, mainly, male adults and a more benign form, in general. The more severe cases are related to the depression of cellular immune response, polyclonal activation of B cells and to a Th2 cellular immunity deviation. Several soluble components are liberated by the fungus, as gp-43, as well as the presence of circulation immune complexes (IC) has benn associated to the deviation of immune response and greater severity in PCM. The aim of this work was to determine differentiating molecular markers between the two forms of the disease. Considering the difficulties in stablishing rapid and simple serological routines with padronized antigens for ambulatory laboratory diagnosis of PCM and treatment follow-up, it was innitialy analyzed possible correlations of alterations observed in fractions of serum proteins electrophoresis and the levels of total IgG and IgE and HDL cholesterol. Thirty serum from CF CPM patients, 12 from AF PCM and 44 from healthy donors (NHS) were analyzed by electrophoresis and enzyme-linked-immunosorbent assay (ELISA). Subsequently, it was investigated the seric levels of total and specific IgG and IgE, IgG-IgE IC and IgG-gp43 IC through ELISA in sera of CF PCM (22), AF PCM (12) and NHS (29). Results demonstrated alterations in protein fractions and that there are positive correlations between beta and gamma-globulins or alpha-1 globulins, gamma and alpha-1 globulins and between gamma-globulins and total IgE levels. Through this work we have concluded that there are differences between the two forms of PCM in regard of fractions alpha-1, alpha-2 and gamma-globulins and that there is difference in albumin results interpretation when analyzed in percentages or absolute levels and that HDL cholesterol do not contribute to the elevations observed in alpha-1 globulins fraction in PCM. The results also confirm that elevated seric levels of total and specific IgG and IgE and IgG-gp43 IC are associated with the more severe form of the disease and this work evidenced for the first time the presence of IgG-IgE IC differentiating between AF and CF PCM.
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46

DIAS, DAS ALMAS JEAN-PIERRE. "Serologie de la toxoplasmose : evaluation de dix trousses commerciales pour le dosage des igg et igm specifiques de toxoplasma gondii." Lille 2, 1992. http://www.theses.fr/1992LIL2M109.

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47

Ferreira, Thalita Lopes. "Avaliação da ação neutralizante e da reatividade de anticorpos IgA e IgG anti-rotavírus SA-11 em soro de adultos saudáveis." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/87/87131/tde-15092011-105733/.

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O rotavírus é a principal causa de diarréia em crianças em todo o mundo. Infecta também adultos, mas não há dados completos sobre a sua incidência nesse grupo nem sobre o papel de anticorpos preexistentes na proteção contra o vírus. O objetivo do trabalho foi avaliar a presença de anticorpos IgA e IgG anti-rotavírus SA-11, por ELISA, em amostras de soro de adultos saudáveis e sua ação neutralizante frente ao vírus, em ensaios de neutralização. Por Immunoblotting foi avaliado o reconhecimento de proteínas virais pelos anticorpos séricos. Observou-se que os títulos das amostras foram muito variáveis, sendo os de IgG superiores aos de IgA. Todas as amostras mostraram-se capazes de neutralizar o vírus em diferentes níveis, porém não foi possível estabelecer uma correlação com os títulos de anticorpos. Foi observado que anticorpos da classe IgG reconhecem mais proteínas virais que os da classe IgA. Este trabalho pode ser considerado mais um passo na elucidação do papel dos anticorpos séricos IgA e IgG anti-rotavírus na infecção em adultos.
Rotavirus has been considered the leading cause of diarrhea in children worldwide. The virus also infects adults but there is no conclusive data neither on the incidence of infection on this group nor on the role of pre-existing antibodies. The aim of the work was to evaluate the presence of anti-rotavirus SA-11 IgA and IgG by ELISA in serum samples of healthy adults and the serum neutralizing ability against the virus by neutralization assays. Immunoblotting was used to evaluate viral proteins recognition by serum antibodies. The antibody titers were extremely variable where IgG titers are greater than IgA ones. All samples were able to neutralize the virus in different levels but it was not possible to establish a correlation between antibody titers and neutralization ones. Immunoblotting assays revealed that IgG antibodies recognize more viral proteins than IgA did. This work can be considered a valuable step for elucidating the role of serum anti-rotavirus IgG and IgA antibodies in adults infection.
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48

Pagliary, Sthefany. "Avaliação do antígeno recombinante ROP2 do Toxoplasma gondii no ensaio imunoenzimático para detecção de anticorpos IgG e IgM em soro humano." Universidade Estadual de Londrina. Centro de Ciências Agrárias. Programa de Pós-Graduação em Ciência Animal, 2013. http://www.bibliotecadigital.uel.br/document/?code=vtls000186262.

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O Toxoplasma gondii é um parasito intracelular obrigatório de distribuição mundial que possui a capacidade de invadir uma enorme variedade de hospedeiros tendo os Felídeos como hospedeiros definitivos. O homem pode adquirir a infecção por meio da ingestão de oocistos esporulados presentes no meio ambiente, ingestão de cistos teciduais e pela via transplacentária. A transmissão congênita ocorre quando a mãe se infecta pela primeira vez durante o período da gestação, na maioria das vezes apresenta-se assintomática e tem o diagnóstico da infecção confirmado por exames imunológicos para pesquisa de anticorpos específicos contra o T. gondii. A elevada sensibilidade dos métodos imunológicos disponíveis atualmente, como o enzimaimunoensaio de captura de IgM ou quimioluminescência, trouxe a realidade da presença de anticorpos IgM anti-T. gondii residuais, que pode levá-la à interpretação incorreta no diagnóstico final. Diante disso, o presente trabalho teve como objetivo avaliar o emprego da proteína recombinante de roptrias ROP2 de T. gondii (rROP2) em um ensaio imunoenzimático (ELISA) indireto para a detecção de anticorpos específicos das classes IgM e IgG contra este antígeno em amostras de soro humano e comparar os resultados obtidos com o antígeno rROP2 aos obtidos com antígeno total solúvel do T. gondii (ELISA-STAg), na imunofluorescência indireta (IFI) e quimioluminescência (CMIA) . Foram avaliadas amostras de soro divididas em quatro grupos, de acordo com o perfil de anticorpos obtidos nos métodos de IFI e CMIA para detecção de IgG e IgM anti-T. gondii e avidez de IgG. No grupo I foram incluídas 72 amostras compatíveis com a fase aguda; no grupo II, 207 amostras compatíveis com fase crônica; grupo III, com 110 amostras de indivíduos não expostos ao T. gondii e grupo IV, com 21 amostras de pacientes com diagnóstico de outras doenças infecciosas ou autoimunes. Na detecção de anticorpos IgM anti-T. gondii pelo ELISA-rROP2 IgM, foi encontrada positividade de 94,3% (67/71) no grupo I e de 62,2% (99/159) em amostras do grupo II. Na detecção de anticorpos IgG anti-T. gondii pelo ELISA-rROP2, as amostras do grupo I apresentaram positividade de 72,2% (52/72) e as amostras do grupo II apresentaram 77,2% (122/158) de positividade. No ELISA-rROP2 IgG, apenas as amostras do grupo IV, com outras doenças não relacionadas ao T. gondii, foram discriminadas. Quando os resultados obtidos foram comparados com a CMIA, a ELISA rROP2 IgM apresentou 92,5% de sensibilidade e 38,3% de especificidade. Quando os resultados obtidos foram comparados com a IFI, o ELISA rROP2 IgG apresentou 75,6% de sensibilidade e 33,3% de especificidade e quando comparado com a CMIA, o ELISA rROP2 IgG apresentou 75,2% de sensibilidade e 32,9% de especificidade. O método de CMIA foi capaz de detectar um maior número de amostras com reatividade aos anticorpos IgG anti-T. gondii do que a IFI, apresentando sensibilidade de 99,2%, especificidade de 82,7% e concordância kappa de 0,86. Os resultados obtidos indicam que a CMIA mostrou -se capaz de caracterizar, de forma clara, as diferentes fases da infecção pelo T. gondii, sendo mais sensível que a IFI. Os resultados demonstraram que o ELISA-rROP2 fornece positividade para ambas as fases de infecção (aguda e crônica). No entanto, na determinação dos níveis de anticorpos IgM pelo ELISA-rROP2, observou-se uma diferença significativa nos níveis de IgM entre os grupos de amostras de infeção aguda versus crônica (p< 0,0001) e aguda versus negativo (p< 0,0001), demonstrando, portanto, uma maior afinidade por anticorpos pertencentes à fase aguda da infecção.
Toxoplasma gondii is an obligate intracellular parasite whose distribution is worldwide. It has the capacity to invade an enourmous variety of hosts, and the felids are its definitive hosts. Humans can get infected through ingestion of environmental sporulated oocysts, ingestion of tissue cysts, and via the transplacental route. Congenital transmission occurs when the mother gets infected for the first time during pregnancy. Mostly, the pregnant remains asymptomatic and the infection diagnose can be confirmed by immunological tests which detect specific T. gondii antibodies. However, the high sensitivity of available immunological tests, such as IgM-capture enzyme linked immunoassay (ELISA) or chemilunescence (CMIA), leaded reality of the presence of residual IgM anti- T. gondii antibodies, which induce wrong interpretation at final diagnose. Given this situation, this study had as aim to assess the use of T. gondii ROP2 rhoptry recombinant proteins (rROP2) at an indirect ELISA for the detection of specific IgM and IgG antibodies against this antigen on human sera samples and to compare the results obtained with the ELISA- rROP2 with those obtained with soluble antigen of T. gondii (ELISA-STAg), IFI, and CMIA. Sera samples were divided into four groups according to the profile of antibodies obtained in the methods of IFI and CMIA for detection of IgG and IgM anti- T. Gondii and IgG avidity. Group I comprised 72 samples with the acute phase, group II consisted of 207 samples with chronic phase, group III comprised with 110 samples from individuals not exposed to T. gondii, and group IV, 21 samples from patients with other diseases infectious or autoimmune diseases. Regarding IgM antibody anti-T. gondii by ELISA-rROP2, the positivity was 94.3% (67/71) in the group I and 62.2% (99 /159) in the group II. . For the detection of IgG anti-T. gondii by ELISA-rROP2, the seropositivity was 72.2% (52/72) in the group I, and 77.2% (122/158) in the group II. In ELISA-rROP2 for IgG detection, only samples of group IV, with non T.gondii-associated diseases, were discriminated. When the results obtained for the detection of IgM using ELISA-rROP2 were compared with the CMIA, the sensitivity was 92.5% and the specificity was 38.3%. When the results for detection of IgG were compared with IFI, the ELISArROP2 showed 75.6% of sensitivity and 33.3% of specificity; and when compared to CMIA, ELISA-rROP2 showed 75.2% of sensitivity and 32.9% if specificity for IgG anti-T. gondii. The CMIA method was able to detect a larger number of positive IgG anti-T. gondii samples than IFI, with sensitivity of 99.2%, specificity of 82.7%, and kappa of 0.86. Results indicate that the CMIA is able to characterize clearly the different stages of T. gondii infection and is more sensitive than the IFI. Results showed that ELISA-rROP2 antigen was positive for both phases of infection (acute and chronic). However, in determining the levels of IgM by ELISA-rROP2, there was a significant difference in IgM levels between acute and chronic infection groups (p<0.0001), and between acute and negative groups (p< 0.0001), showing, therefore, a higher antibody affinity belonging to the acute than chronic phase of infection.
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49

JACQUEMIER, CHRISTIANE. "Diagnostic ante-natal de la toxoplasmose congenitale : interet diagnostique des igm et iga specifiques et de cinq signes indirects d'infection foetale." Lyon 1, 1993. http://www.theses.fr/1993LYO1M188.

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50

Carpenet, Guéry Hélène. "Radiomarquage au 99mTc des IgA et IgG : optimisation du marquage, étude in vitro, biodistribution chez l'animal sain et sur modèle tumoral." Thesis, Limoges, 2015. http://www.theses.fr/2015LIMO0074/document.

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Depuis leur découverte en 1975 par Köhler et Milstein, le monde des Ac monoclonaux a beaucoup évolué. Ils occupent actuellement une place prépondérante dans la prise en charge de nombreux cancers. De nos jours, les Ac monoclonaux, ayant une AMM ou en essai clinique, sont tous de classe IgG voire IgG1. Cette classe d’Ac a cependant montré des limites à son utilisation, et l’étude d’autres isotypes d’Ac, comme les IgA, pourrait être intéressante. Les IgA, isotype d’Ac particulier en raison notamment de leur hétérogénéité dans les formes moléculaires, demeurent peu étudiées à l’instar des IgG. Dans ce travail, nous proposons un radiomarquage des IgA monomériques, polymériques et sécrétoires, avec le 99mTc par une méthode indirecte impliquant le 2-iminothiolane et le cœur tricarbonyl. Par le biais de ce radiomarquage, la biodistribution des IgA monomériques et polymériques après administration i.v. a été évaluée chez l’animal sain et chez l’animal porteur de tumeur à localisation muqueuse. Ces études nous ont permis d’entrevoir le potentiel diagnostique des IgA, mais aussi leur intérêt en thérapie ciblée de tumeurs à localisation muqueuse. D’autre part, grâce à leur résistance enzymatique et au phénomène de retranscytose, une nouvelle voie d’administration des Ac monoclonaux pourrait être développée. Dans cette optique, des IgA sécrétoires ont été administrées par voie orale lors d’études préliminaires de biodistribution
Since their discovery in 1975, by Köhler and Milstein, monoclonal antibodies (mAbs) world has significantly evolved and they currently hold a prominent place in cancers care. Today, the mAbs, having a marketing authorization or in clinical trial, are all IgG class (IgG1). However, this Ab class showed limitations on its use, and the study of other isotypes, such as IgA, could be interesting. Unlike IgG, IgA, original isotype particularly because of their heterogeneity in molecular forms, remains understudied. In this work, we propose a radiolabeling of monomeric, polymeric and secretory IgA with 99mTc by an indirect method, involving 2-iminothiolane and tricarbonyl core. Biodistribution of radiolabeled monomeric and polymeric IgA was evaluated, after intravenous administration, in healthy animals and in mucosal tumor-bearing animals. These studies have allowed us to glimpse the IgA diagnostic potential, but also their interest in targeted therapy of tumors with mucosal localization. Moreover, thanks to their enzymatic strength and retranscytosis, a new administration route of mAbs could be developed. In this context, secretory IgA were administered orally in preliminary biodistribution studies
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