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- W4300583529 abstract "Rheumatoid factors (RF), which are auto-antibodies recognising the Fc fragment of IgGs, are the commonest auto-antibodies in man. They are present in polyclonal form in a large number of auto-immune disorders as well as in certain inflammatory states. In monoclonal form, they are frequently the product of mature malignant (chiefly Waldenström's macroglobulinemia and chronic lymphoid leukemia) and allegedly benign (such as cryoglobulinemias) lymphoid proliferations. In addition, RF account for a significant part of the normal antibody repertory, notably during the fetal and neonatal periods, suggesting that they may play an important role in the development and regulation of the immune system. As a result, RF are an excellent model for the analysis of auto-immunity in man. Thus many indirect (analysis of antigens recognised and of idiotopes carried) and, more recently, direct (protein or nucleotide sequencing of their various regions) studies have now provided the following conclusions. RF are coded by a very limited repertory of V genes. These genes are present in the normal genome and appear to be highly preserved in the human species. They are used with very few somatic mutations by monoclonal B proliferations (which opens up valuable therapeutic possibilities) as well as probably by RF producing B lymphocytes in normal individuals. In contrast, in the context of auto-immune disorders, these same genes have many somatic mutations suggesting maturation governed by the antigen and/or escape from idiotype control." @default.
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- W4300583529 date "1992-01-01" @default.
- W4300583529 modified "2023-09-30" @default.
- W4300583529 title "[Rheumatoid factors]." @default.
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