Dissertations / Theses on the topic 'Immunoglobuline A'
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Malinge, Sophie. "Etude comparative des gènes Cmu et de leurs régions flanquantes chez le mouton et les mammifères." Poitiers, 1997. http://www.theses.fr/1997POIT2377.
Full textDas, Mrinmoy. "The regulatory effects of circulating normal immunoglobulins on autophagy and Th17 response." Thesis, Paris 6, 2017. http://www.theses.fr/2017PA066153/document.
Full textCirculating immunoglobulins play a critical role in the immune homeostasis by modulating the functions of immune cells. In my thesis, I investigated the regulatory effects of therapeutic immunoglobulin G (IVIG) and circulating monomeric immunoglobulin A (mIgA) on autophagy and human Th17 response respectively. IVIG is a therapeutic preparation of pooled normal IgG. It is used as an anti-inflammatory agent in the treatment of a wide variety of autoimmune and inflammatory diseases. However, the mechanisms are not yet fully elucidated and several mutually non-exclusive mechanisms have been proposed. Autophagy is an important biological process involving lysosomal degradation of damaged cellular components and misfolded proteins. There are several evidences that support the involvement of autophagy in autoimmune and auto- inflammatory disorders including the discovery of polymorphisms in autophagy-related genes. I show that induction of autophagy by IVIG represents a novel mechanism of action in achieving therapeutic effect in autoimmune and inflammatory diseases. Th17 cells represent an attractive target to treat several inflammatory and autoimmune diseases. Despite being second most abundant antibody in the circulation, the immunoregulatory function of IgA is relatively unexplored. I have shown that monomeric IgA (mIgA) inhibits differentiation and amplification of human Th17 cells and the production of their effector cytokine IL-17A
Martinez-Rivas, Gemma. "Exploration des mécanismes physiopathologiques de l'amylose et évaluation des nouvelles approches thérapeutiques." Electronic Thesis or Diss., Limoges, 2024. http://www.theses.fr/2024LIMO0052.
Full textLight chain (AL) amyloidosis is one of the most common forms of systemic amyloidosis, caused by the deposition of immunoglobulin (Ig) light chains (LC) in the form of amyloid fibrils in tissues, leading to organ dysfunction. The most frequent and severe forms affect the kidneys and heart, with the latter associated with a poor prognosis. Despite considerable efforts to understand the mechanisms of fibril formation and their toxicity, the lack of reliable in vivo models hinders the study of the disease in its physiological context. This thesis focuses on exploring the pathophysiological mechanisms in AL amyloidosis. For this study, we developed a mouse model that reproduces the human pathology. Under induction, our model develops cardiac involvement associated with organ dysfunction, which can be compared to the effects observed in patients. Thus, the characterization of this model has shown its relevance in reproducing human pathophysiology. This unique model opens new avenues for exploring the mechanisms of light chain aggregation and deposition, and can also serve as a tool for therapeutic and diagnostic testing
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.
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
Nourichafi, Nadia. "Purification des immunoglobulines plasmatiques humaines par chromatographie à partir de la fraction II+III de Cohn." Nancy 1, 1993. http://www.theses.fr/1993NAN19429.
Full textAudhuy, Stéphane. "Développement et automatisation de coffrets de détection d'immunoglobulines G et M toxoplasmiques." Université Louis Pasteur (Strasbourg) (1971-2008), 1996. http://www.theses.fr/1996STR13292.
Full textAlcaraz, Gisèle. "Etudes structurales d'une immunoglobuline D de myélome de rat et du Fc-récepteur pour l'IgE exprimé par les mastocytes et les basophiles." Aix-Marseille 2, 1987. http://www.theses.fr/1987AIX22044.
Full textBillard, Florence. "Utilisation des immunoglobulines polyvalentes dans le traitement du Purpura thrombopénique idiopathique." Paris 5, 1989. http://www.theses.fr/1989PA05P029.
Full textMartin, Charlotte Morin-Niglais Odile. "Sérologie de la toxoplasmose." [S.l.] : [s.n.], 2004. http://theses.univ-nantes.fr/thesemed/PHmartinc.pdf.
Full textAkram, Kasmi. "Mise au point d'une technique immuno-enzymatique (ELISA) appliquée au titrage des facteurs rhumatoïdes : Ig. M, Ig. G, et Ig. A." Lyon 1, 1985. http://www.theses.fr/1985LYO1W234.
Full textOudinet, Annie. "Les IgE, leur dosage par les méthodes "in vitro" : intérêt de ces dosages dans le bilan allergologique." Paris 5, 1989. http://www.theses.fr/1989PA05P100.
Full textRiche, Philippe. "Les immunoglobulines d monoclonales (igd) : a propos de 6 observations." Angers, 1988. http://www.theses.fr/1988ANGE1058.
Full textTang, Jianqing. "Réarrangements alternatifs des gènes d'immunoglobulines codant pour les chaines légère kappa et lambda dans les cellules b humaines." Nancy 1, 1991. http://www.theses.fr/1991NAN10140.
Full textMole, Claire. "Caractéristiques immunochimiques des IGA des secrétions humaines." Nancy 1, 1991. http://www.theses.fr/1991NAN10457.
Full textDecot, Véronique. "Les Récepteurs aux immunoglobulines A des éosinophiles." Lille 2, 2004. http://www.theses.fr/2004LIL2S042.
Full textImmunoglobulin A is the most abundant class of antibodies at mucosal surfaces where eosinophils carry out many of their effector functions. In the first part of this work, we aimed to analyze the interaction between IgA and human, mouse or rat eosinophils. Most of the known IgA-mediated functions require an interaction with IgA receptors, six of which have been identified in humans. These include the IgA Fc receptor, FcαRI/CD89 and the receptor for the secretory component (SCR), already identified on human eosinophils, the polymeric (p)IgR, Fcα/µR, the Asialoglycoprotein (ASGP)-R and the transferrin Receptor, TfR/CD71. In rodents, the existence of IgA receptors on mouse and rat eosinophils remains unclear. We have compared the expression and function of IgA receptors by human, rat and mouse eosinophils. Our results show that human eosinophils express functional pIgR, ASGP-R and TfR, in addition to CD89 and SCR and that IgA receptors are expressed by rodent eosinophils. Indeed, mouse eosinophils only expressed TfR while rat eosinophils expressed ASGP-R and CD89 mRNA. These results provide a molecular basis for the differences observed between human, mouse and rat regarding IgA-mediated immunity. In the second part of this work, we investigated whether suplatast tosilate, a new anti-allergic drug could exert direct effects on human eosinophil IgA induced activation. The results showed that suplatast tosilate could reduce the pathological potential of IgA stimulated eosinophils by inhibiting the release of oxygen radicals and cationic proteins. Moreover, the inhibition of immunoregulatory cytokines released by eosinophils could locally modify the immune response
Guitard, Christine. "Dosage des sous-classes d'IgG humaines par ELISA à l'aide d'anticorps monoclonaux." Paris 5, 1993. http://www.theses.fr/1993PA05P101.
Full textMarquet, Marie. "Modèles murins pour l’étude d’éléments régulateurs du locus IgH : ciblage des régions Eμ et 3’régulatrices." Limoges, 2012. https://aurore.unilim.fr/theses/nxfile/default/23828f3f-0b7e-42fb-90aa-36367cd81ed0/blobholder:0/2012LIMO310E.pdf.
Full textDuring B cells development, the IgH locus undergo many genetics rearrangements regulated by several cis-regulatory elements. The first regulatory region is composed of the intronic enhancer cEμ and its matrix attachment regions (MARsEμ). In our study, we have realized the Knock-Out of both full length Eμ and the MARsEμ regions. The first model led to a drastic B cell development blockade and confirms the importance of Eμ at the early stages. This model also highlights the important role of Eμ for the μ heavy chain expression at the pre-B cell stage. Eμ deletion results in the unbalance of peripheral B cells subsets wherein follicular B cell population is decreased in favor of marginal zone B cells. The second model revealed an important role of MARsEμ for somatic hypermutation. Surprisingly, the MARsEμ regions influence this process in cis at the IgH locus but also in trans at the ҡ light chain locus. The second regulatory region, located at the 3’ end of the locus, contains four transcriptional enhancers (hs3a, hs1-2, hs3b, hs4). It displays a “quasi-palindromic” architecture; including inverted repeated sequences organized around hs1-2 element (hs4 is outside of this structure). The function of this particular structure remains unknown. The “quasi-palindromic” Knock-Out confirms that hs4 allows an optimal expression of the μ heavy chain in resting B cells. This model demonstrates also a key role of this region for transcription-coupled somatic hypermutation
Diaw, Lena. "Polyreactivite et structure des auto-anticorps naturels murins." Reims, 1997. http://www.theses.fr/1997REIMP207.
Full textMirandon, Delorme Frédérique. "Les immunoglobulines E au cours de l'infection par le virus de l'immunodéficience humaine : 148 observations personnelles, étude de la littérature." Saint-Etienne, 1993. http://www.theses.fr/1993STET6212.
Full textSammut, Jean-Christophe. "Intérêt du dosage des IgD dans le diagnostic de syndrome d'hyper-immunoglobulinémie D." Paris 5, 1998. http://www.theses.fr/1998PA05P123.
Full textJACQUEMIER, 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 textBeaulieu, Lucie. "Mise au point d'une technique enzymatique pour doser les IgE seriques spécifiques." Master's thesis, Université Laval, 1986. http://hdl.handle.net/20.500.11794/33554.
Full textMontréal Trigonix inc. 2018
Rousseaux-Prévost, Roselyne. "L'immunoglobuline E du rat : contribution à l'étude des relations structure-activité biologique." Lille 1, 1987. http://www.theses.fr/1987LIL10029.
Full textLOYRION, CLINKEMAILLIE VALERIE. "Asthme et immunoglobulines intraveineuses haute-dose." Lille 2, 1994. http://www.theses.fr/1994LIL2M108.
Full textTunon, de Lara José-Manuel. "Immunoglobuline E et cellules de la paroi bronchique." Bordeaux 2, 1995. http://www.theses.fr/1995BOR28366.
Full textAbbad, Lilia. "Rôle de la voie transglutaminase 2/MMP-9 dans la pathogénèse de la néphropathie à IgA et nouvelles approches thérapeutiques." Thesis, Sorbonne Paris Cité, 2018. http://www.theses.fr/2018USPCC118.
Full textIgA nephropathy (IgAN) is a mesangial proliferative primary glomerulonephritis and a major cause of end-stage renal disease. Causes and factors leading to mesangial IgA1 deposition are unknown. The soluble form of the receptor (sCD89) complexed with IgA plays a key role in the pathogenesis of the disease. There is currently no specific treatment available and the therapeutic options are limited. A better comprehension of the mechanisms regulating the formation of IgA1-sCD89 complexes will unveil new strategies for targeted therapies. In this perspective, the first part of this thesis highlights the implication of the transglutaminase 2 (TG2), a protein essential for the development of IgAN, in the regulation of CD89 cleavage, in a mechanism involving the repression of the serine phosphatase PP2A and the activation of the matrix metalloproteinase MMP-9. While a trend towards TG2 increase is observed, PP2A expression is reduced in monocytes obtained from IgAN patients compared to controls, and inversely correlates with the levels of circulating hIgA1-sCD89 complexes. In order to target these pathogenic complexes, a preclinical assay has been performed with a recombinant protease, a bacterial protein that selectively cleaves human IgA1 (IgA1-P). Results formally demonstrate the specificity and the efficacy of the IgA1-P in the reduction of circulating complexes and mesangial IgA1 deposition in a humanized mouse model of IgAN, associated with a reduction in inflammation and hematuria. Concluding, the results presented in this thesis show a role for the TG2-PP2A-MMP-9 axis in the dysregulated formation of IgA1-sCD89 complexes during IgAN development, as well as the effectiveness of IgA1-P in the elimination of these complexes. In addition to the potential therapeutic use of IgA1-P, this work suggests the TG2-PP2A-MMP-9 axis as a new therapeutic candidate for IgAN treatment
Rosier, Bruno. "Utilisation des immunoglobulines polyvalentes intraveineuses dans un service de médecine interne de 1982 à 1992 : à propos de 60 cas." Bordeaux 2, 1994. http://www.theses.fr/1994BOR2M138.
Full textMata, Esther. "Évaluation des méthodes de diagnostic biologique et caractérisation physicochimique des ige spécifiques en allergo-anesthésie." Nancy 1, 1993. http://www.theses.fr/1993NAN19427.
Full textLeyendecker, Jacky. "Mécanismes cellulaires de la synthèse des immunoglobulines A sécrétoires." Strasbourg 1, 1985. http://www.theses.fr/1985STR10547.
Full textRUGO-COSTA, MARIE-AGNES. "Xeno-immunisation anti-thymoglobuline et anti-lymphoglubine chez les transplantes renaux." Nancy 1, 1993. http://www.theses.fr/1993NAN10207.
Full textVergnolle, Brigitte. "Apport d'un nouveau test immunoluminométrique de détection simultanée d'IgE spécifiques sériques : étude chez 100 sujets allergiques." Paris 5, 1989. http://www.theses.fr/1989PA05P204.
Full textWehbe, Batoul. "IgA et rein : destructrice ou protectrice ? : Rôles de l'immunoglobuline A (IgA) dans deux pathologies rénales." Thesis, Limoges, 2018. http://www.theses.fr/2018LIMO0034/document.
Full textImmunoglobulin A (IgA) is the most synthetized immunoglobulin in mammals. IgA has ambivalent properties: it is implicated in the mechanisms of defense against pathogens but also in the immune tolerance of commensal microbiota. However, IgA can develop pathogenic properties. In the first part of my thesis, we studied the pathogenic effects of IgA. IgA deposits are the main characteristic of IgA nephropathy (IgAN). IgAN physiopathology is not yet clearly understood. The hypothesis of a glycosylation defect is strongly adapted. This defect can be due to IgA polymerization or antigenicity. It can also induce shedding of CD89 (IgA Fc receptor) or other factors. We studied the effect of variable region altered affinity, the light chain substitution and the association of IgA with CD89 on the development of kidney lesions and impairment of kidney function in four mouse models followed up during 12 months. In addition, we studied the physico-chemical properties of 28 IgA purified from patients with dysglobulinaemia and 28 chimeric IgA produced by hybridomas. The effect of these properties on the propensity of IgA for mesangial deposition was explored. In the second part, we studied the immunomodulatory and anti-inflammatory properties conferred by the overexpression of human IgA in a mouse model with systemic lupus (MRL/lpr model). In the last part, we contributed to the characterization of a transgenic mouse model producing IgA class 2 and to the study of the effect of IgA2-mediated signaling on B lymphocyte development. Altogether, obtained results show the pathogenic effect of low affinity-IgA on the development of IgA nephropathy. In addition, different analyses showed that molecular stability but not glycosylation profile is the determining factor for IgA deposition. On the other hand, IgA expression in lupus-prone mice extended their survival, delayed the onset of auto-immunity and ameliorated kidney functions in these animals which supports IgA anti-inflammatory properties. The study of IgA2-mediated signaling in the transgenic model showed the inhibitory effect of IgA2 on the early development of several B cell sub-populations. All of these results show the multiple effects of IgA which contribute on one hand to the pathogenesis of a complex disease (IgAN) and on the other hand to protection from autoimmunity, demonstrating the complexity of interactions and the regulatory character of this immunoglobulin
Nugues, Cécile. "Intérêt des immunoglobulines A spécifiques pour le diagnostic d'infection par le toxoplasme : toxoplasmose aigüe, toxoplasmose viscérale et rechute sérologique du sujet immunodéprimé." Paris 5, 1993. http://www.theses.fr/1993PA05P124.
Full textDautrey, Véronique. "Les mécanismes cellulaires et moléculaires qui accompagnent les réactions d'hypersensibilité de type I." Paris 5, 1997. http://www.theses.fr/1997PA05P122.
Full textLaverrière, Anne-Cécilia. "Étude de la fixation d'entités immunologiques sur des particules de latex fonctionnalisés : applications à la détection du méningocoque B et à la détermination de l'hormone choriogonadotropine humaine." Lyon 1, 1990. http://www.theses.fr/1990LYO10218.
Full textRazat, Jean-François. "Les syndromes avec hyperproduction d'immunoglobuline E : revue et synthèse à propos de deux cas ne correspondant pas à la définition du syndrome de Buckley." Montpellier 1, 1991. http://www.theses.fr/1991MON11177.
Full textClément, Benoît. "Étude de l'interaction entre les immunoglobulines A sécrétoires et la cellule épithéliale intestinale humaine." Thesis, Sorbonne Paris Cité, 2017. http://www.theses.fr/2017USPCB048/document.
Full textAmong the five isotypes of antibodies found in Humans, immunoglobulins A (IgA) are the most abundant in the mucosae. In the lamina propria, IgA are produced mainly as polymeric IgA (pIgA) and then secreted in the lumen. In fact, pIgA are translocated across the epithelium via the polymeric immunoglobulin receptor (pIgR), which is expressed at the basolateral side of the epithelium. Once secreted in the lumen, pIgA retain the extracellular domain of the pIgR and are called secretory IgA (SIgA). One of the main functions of intestinal SIgA is to restrain microorganisms and dietary antigens in the lumen, therefore, preventing their uptake through the epithelial barrier. However, retrotranscytosis of SIgA conjugated to bacteria has been described in Peyer’s patches where it participates to immune response. Moreover, previous works from the laboratory have suggested that transferrin receptor (CD71), which is overexpressed at the apical side of enterocytes from coeliac patients, interacts with SIgA bound to gliadin peptides and allows their retrotranscytosis across the intestinal epithelium. This thesis work aimed to further characterize the interaction between SIgA and CD71 in human enterocytes. We, first, generated a human epithelial intestinal cell line (Caco-2 TC7) devoid of CD71 expression (CD71KO) using the CRISPR/Cas9 genome editing method. Unexpectedly, flow cytometry experiments did not reveal a significant reduction of SIgA binding at the cell surface of CD71KO cells. Overall, our results indicated that CD71-SIgA interaction is indirect and may occur via additional protein partners through the assembly of a multifactorial protein complex. Therefore, we screened IgA receptors already known in the literature and showed that all are dispensable for SIgA binding at the surface of Caco-2 TC7 cells. In the effort to identify partner(s) within SIgA-CD71 complex, we set out mass spectrometry-based immunoprecipitation proteomics experiments and identified secretory carrier membrane protein 3 (SCAMP3), B-cell receptor-associated protein 31 (BCAP31) and histocompatibility minor 13 (HM13) as members of SIgA-CD71 complex. By generating knockout cell lines with the CRISPR/Cas9 system, we showed that none of these partners directly interacts with SIgA. However, our results suggest that SCAMP3 is required for the oligomerization of SIgA complexes at cell surface. Finally, we did not find any role in SIgA internalization for the different members of the complex, suggesting that they may play a role later on during SIgA retrotranscytosis. In conclusion, our work shows that SIgA interact with the intestinal epithelium via a proteic complex composed of at least five members: CD71, SCAMP3, BCAP31, HM13 and one or more unknown SIgA receptor(s). These results complement the previous works on the pathophysiologic role of SIgA in coeliac disease and underline the highly complex interaction between IgA and enterocytes. An important point to address will be to identify SIgA receptor(s) and to determine the role of the four other identified partners in SIgA retrotranscytosis across the intestinal epithelium
STORELLI, DOMINIQUE. "La dermatose a iga lineaire : revue de la litterature a propos de deux cas." Nice, 1991. http://www.theses.fr/1991NICE6012.
Full textMARTINAGE, TREMEAU CATHERINE. "Analyse des sous-classes d'immunoglobulines g impliquees dans le pemphigus : recherche d'une correlation avec des parametres cliniques ou evolutifs." Toulouse 3, 1994. http://www.theses.fr/1994TOU31534.
Full textLelièvre, Eric. "Etude de l'action stimulante de l'interleukine-10 sur la synthèse de cytokines et la production d'IgD in vitro." Poitiers, 1997. http://www.theses.fr/1997POIT2369.
Full textBerger, Marie-Claire. "Etude des interactions entre des copolymères statistiques dérivés du polystyrène et des immunoglobulines antivirales." Paris 13, 2001. http://www.theses.fr/2001PA132009.
Full textLECAT, NATHALIE. "Interet des immunoglobulines polyvalentes intraveineuses utilisees en phase initiale du traitement de la dermato-polymyosite : (a propos d'une observation)." Lille 2, 1993. http://www.theses.fr/1993LIL2M042.
Full textWEINBERG, ISABELLE. "La nephropathie primitive a iga en 1994 (maladie de berger)." Aix-Marseille 2, 1994. http://www.theses.fr/1994AIX20095.
Full textKomminoth, Anne. "Traitement des myopathies inflammatoires de l'adulte : intérêt des immunoglobulines humaines polyvalentes par voie intra-veineuse : à propos de trois observations." Université Louis Pasteur (Strasbourg) (1971-2008), 1993. http://www.theses.fr/1993STR1M151.
Full textDONADINI, VERONIQUE. "Regulation de la synthese des ige : donnees recentes." Strasbourg 1, 1993. http://www.theses.fr/1993STR15047.
Full textAUGAREILS, CHRISTIAN. "Marqueurs allotypiques des immunoglobulines (systemes gm et km) dans la polyarthrite rhumatoide : etude realisee a partir de 130 cas." Toulouse 3, 1990. http://www.theses.fr/1990TOU31031.
Full textHeitz-Calatayud, Sabine. "Traitement des fausses couches spontanées à répétition par les immunoglobulines intraveineuses : études immunologiques et rôle potentiel des grands lymphocytes granuleux déciduaux." Lyon 1, 1997. http://www.theses.fr/1997LYO1T234.
Full textSercy, Odile. "Eimeria mulardi chauve et al 1994 : éléments de caractérisation biochimique et réponse à l'infection expérimentale des canards de Pékin (Anas plathyrhinchos), de barbarie (Cairina Moschata) et de leur hybride, le canard mulard." Lyon 1, 1997. http://www.theses.fr/1997LYO1T154.
Full textMUGUET, CASTELL PAQUERETTE. "Les immunoglobulines intraveineuses en dermatologie." Dijon, 1994. http://www.theses.fr/1994DIJOM083.
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 text