Dissertations / Theses on the topic 'Ign'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 dissertations / theses for your research on the topic 'Ign.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
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/.
Full textSantos, 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.
Full textThis 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.
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.
Full textSellers, 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.
Full textRibeiro, 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.
Full textThis 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
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.
Full textRODRIGUES, 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.
Full textEssa 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.
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.
Full textHjelm, 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.
Full textFacin, 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.
Full textDing, 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.
Full textFelix, 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/.
Full textDespite 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
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.
Full textKeiserman, 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.
Full textIgG 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.
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.
Full textApproved for entry into archive by Delba Rosa (delba@ufba.br) on 2017-03-23T13:41:01Z (GMT) No. of bitstreams: 1 Dissertação_ICS_ Fernanda Garcia Guerra.pdf: 320427 bytes, checksum: f3c495155faf56748788adbb54a6f36c (MD5)
Made available in DSpace on 2017-03-23T13:41:01Z (GMT). No. of bitstreams: 1 Dissertação_ICS_ Fernanda Garcia Guerra.pdf: 320427 bytes, checksum: f3c495155faf56748788adbb54a6f36c (MD5)
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.
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.
Full textHuang, 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.
Full textKumbaric, 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.
Full textRheumatoid 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.
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.
Full textIgG 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.
Mouthon, Luc. "Analyse des repertoires autoreactifs des igm et des igg dans le serum humain normal." Paris 7, 1996. http://www.theses.fr/1996PA077252.
Full textAli, 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.
Full textSuzuki, Lisandra Akemi. "Resposta imune humoral na neurocisticercose." [s.n.], 2010. http://repositorio.unicamp.br/jspui/handle/REPOSIP/308741.
Full textTese (doutorado) - Universidade Estadual de Campinas. Faculdade de Ciencias Medicas
Made available in DSpace on 2018-08-15T09:51:57Z (GMT). No. of bitstreams: 1 Suzuki_LisandraAkemi_D.pdf: 1217880 bytes, checksum: 4ceb1f773f112c88145bc69e02976ef2 (MD5) Previous issue date: 2010
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
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.
Full textPeters, 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.
Full textCandida 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.
Garbatini, Elisa <1982>. "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/.
Full textCanine 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.
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/.
Full textToxoplasmosis, 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.
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.
Full textAubert, 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.
Full textZimmer, 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.
Full textSchmidt, 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.
Full textDantas, 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.
Full textInfections 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
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.
Full textSchmidt, 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.
Full textSchmidt, 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.
Full textDiehl, 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.
Full textLi, 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.
Full textADIB-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.
Full textDalloul, 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.
Full textThe 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
Layward, Lorna. "IgA in IgA nephropathy." Thesis, University of Leicester, 1992. http://hdl.handle.net/2381/34129.
Full textThomas, 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.
Full textGhouma, 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/.
Full textAssolini, 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.
Full textParacoccidioidomycosis (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.
Allen, Alice. "IgA glycosylation in IgA nephropathy." Thesis, University of Leicester, 1995. http://hdl.handle.net/2381/35028.
Full textWu, 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.
Full textMarquez, 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.
Full textParacoccidioidomycosis (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.
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.
Full textFerreira, 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/.
Full textRotavirus 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.
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.
Full textToxoplasma 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.
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.
Full textCarpenet, 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.
Full textSince 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