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排序方式: 共有91条查询结果,搜索用时 15 毫秒
1.
Pashov A Kenderov A Kyurkchiev S Kehayov I Hristova S Lacroix-Desmazes S Giltiay N Varamballi S Kazatchkine MD Kaveri SV 《International immunology》2002,14(5):453-461
The present study demonstrates the presence of natural autoantibodies of the IgG isotype directed against heat shock protein 90 (HSP90). The binding properties of affinity-purified anti-HSP antibodies were compared with those of natural antibodies specific for other self antigens, including anti-thyroglobulin and anti-myoglobin autoantibodies, by using semiquantitative immunoblotting, with solubilized proteins from normal liver tissue as antigens, and cross-blot analysis using purified self proteins. Affinity-purified anti-HSP90 antibodies were polyreactive and the non-HSP90-specific fraction of normal IgG was depleted in its natural autoantibody content. We further observed that self antigens including HSP, myosin, tubulin and aldolase with highly conserved structures show similar patterns of binding with natural antibodies, and form a well-defined cluster as demonstrated by cluster analysis of immunoreactivity data, whereas the less-conserved self and non-self antigens remained unclustered. The results favor the hypothesis that HSP90 belongs to a subset of highly conserved and immunodominant self antigens that are the primary target for natural autoantibodies in normal human IgG. 相似文献
2.
Dendritic cells and autoimmunity 总被引:7,自引:0,他引:7
Bayry J Thirion M Delignat S Misra N Lacroix-Desmazes S Kazatchkine MD Kaveri SV 《Autoimmunity reviews》2004,3(3):183-187
Dendritic cells (DC) are professional antigen-presenting cells that are specialized in the uptake of antigens and their transport from peripheral tissues to the lymphoid organs. Because of their capacity to stimulate naive T cells, DC have a central role in the initiation of primary immune responses and are considered promising tools and targets for immunotherapy. Emerging data suggest a role for DC in initiating autoimmune attacks. Direct analysis of DC phenotypes and DC-T-cell interactions in rodent and human autoimmune diseases should shed light on how pathogenesis occurs, and suggest novel avenues of treatment aimed at alleviating deviant DC function. 相似文献
3.
Immunomodulation of autoimmune and inflammatory diseases with intravenous immunoglobulin 总被引:2,自引:0,他引:2
Ephrem A Misra N Hassan G Dasgupta S Delignat S Duong Van Huyen JP Chamat S Prost F Lacroix-Desmazes S Kavery SV Kazatchkine MD 《Clinical and experimental medicine》2005,5(4):135-140
Abstract Intravenous immunoglobulin (IVIg) has been used in the treatment of primary and secondary antibody deficiencies for over two
decades. Since the early 1980s, the therapeutic efficacy of IVIg has been established in idiopathic thrombocytopenic purpura,
Guillain-Barré syndrome, chronic inflammatory demyelinating polyneuropathy, myasthenia gravis, dermatomyositis and Kawasaki
syndrome, and the prevention of graft versus host disease in recipients of allogeneic bone marrow transplants. Its use has
also been reported in a large number of other autoimmune and systemic inflammatory conditions. In this review, we discuss
the mechanisms by which IVIg exerts immunomodulatory effects in immune pathologies. 相似文献
4.
Lacroix-Desmazes S Mouthon L Kaveri SV Kazatchkine MD Weksler ME 《Journal of clinical immunology》1999,19(1):26-34
We have used a quantitative immunoblotting technique to analyze the repertoires of self-reactive antibodies in serum samples obtained from the same five healthy adults over a 25-year interval. The average age of the donors was 43 years at the time of the first serum sample and 69 years at the time of the second serum sample. The antibody repertoires of IgM and IgG were found to be strikingly similar among individuals in both early and late samples. Densitometric profiles of self-reactivity of serum IgM and of purified serum IgG remained unchanged over the 25-year interval. The total reactivity of serum IgG decreased significantly over the 25-year period. The observed stability of the natural self-reactive IgM and IgG antibody repertoires with aging supports the view that autoreactive B cells in the normal immune system are positively selected for reactivity with a limited set of immuno-dominant self-antigens throughout life. 相似文献
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7.
Polyspecificity is defined as the ability of a given antibody molecule to bind a large panel of structurally diverse antigens. A fraction of circulating IgG in all healthy individuals acquires promiscuous antigen-binding activity only after a transient exposure to certain protein destabilizing factors. The molecular mechanisms of this phenomenon are not well understood. Exposures to protein destabilizing agents are common steps in immunoglobulin isolation and purification processes. We performed kinetic and thermodynamic analyses using surface plasmon resonance-based technique in order to characterize the interactions of a single mouse monoclonal antibody to its cognate antigen before and after induction of promiscuous antigen-binding activity. The obtained results, suggest that enhanced antigen binding activity induced by exposure to mild denaturing condition resulted from an increase in the structural flexibility of the antigen-binding site. Further pH and ionic strength-dependence analyses of the antibody/antigen interactions demonstrated that the transition to promiscuous antigen-binding was accompanied by a change in the type of non-covalent forces involved in the complex formation. Moreover, from this study, it is evident that an antibody molecule could use two distinct thermodynamic pathways for binding to the same antigen while retaining the same value of the binding affinity. The obtained results may contribute to the understanding of the molecular mechanisms that lay behind natural antibody polyspecificity. 相似文献
8.
Alessandra Vitale Samantha Molina-Gutirrez W. S. Jennifer Li Sylvain Caillol Vincent Ladmiral Patrick Lacroix-Desmazes Sara Dalle Vacche 《Materials》2022,15(1)
Biobased monomers and green processes are key to producing sustainable materials. Cardanol, an aromatic compound obtained from cashew nut shells, may be conveniently functionalized, e.g., with epoxy or (meth)acrylate groups, to replace petroleum-based monomers. Photoinduced polymerization is recognized as a sustainable process, less energy intensive than thermal curing; however, cardanol-based UV-cured polymers have relatively low thermomechanical properties, making them mostly suitable as reactive diluents or in non-structural applications such as coatings. It is therefore convenient to combine them with biobased reinforcements, such as microfibrillated cellulose (MFC), to obtain composites with good mechanical properties. In this work a cardanol-based methacrylate monomer was photopolymerized in the presence of MFC to yield self-standing, flexible, and relatively transparent films with high thermal stability. The polymerization process was completed within few minutes even in the presence of filler, and the cellulosic filler was not affected by the photopolymerization process. 相似文献
9.
Misra N Bayry J Ephrem A Dasgupta S Delignat S Duong Van Huyen JP Prost F Lacroix-Desmazes S Nicoletti A Kazatchkine MD Kaveri SV 《Journal of neurology》2005,252(Z1):I1-I6
Intravenous immunoglobulin (IVIg) has been used in the treatment of primary and secondary antibody deficiencies for over 25 years. It is a safe preparation with no long-term side effects. IVIg was first demonstrated to be effective in autoimmune disorders, two decades ago, in the treatment of acute immune thrombocytopenia. Since then, the therapeutic efficacy of IVIg has been established in Guillain Barré syndrome (GBS), chronic inflammatory demyelinating polyneuropathy (CIDP), myasthenia gravis (MG), dermatomyositis (DM), Kawasaki syndrome and the prevention of graft-versus-host disease in recipients of allogeneic bone marrow transplants and reported in a large number of other autoimmune and systemic inflammatory conditions. 相似文献
10.
Bayry J Lacroix-Desmazes S Kazatchkine MD Kaveri SV 《Trends in pharmacological sciences》2004,25(6):306-310
The dramatic increase in both the number of novel infectious agents and resistance to antimicrobial drugs has incited the need for adjunct therapies in the war against infectious diseases. Exciting recent studies have demonstrated the use of antibodies in the form of intravenous immunoglobulin (IVIg) against infections. By virtue of the diverse repertoire of immunoglobulins that possess a wide spectrum of antibacterial and antiviral specificities, IVIg provides antimicrobial efficacy independently of pathogen resistance and represents a promising alternative strategy for the treatment of diseases for which a specific therapy is not yet available. 相似文献