Rheumatoid factor cross idiotypes.
Rheumatoid factor cross idiotypes.
复制标题
类风湿因子交叉独特型。
DOI:
10.1007/bf01857225
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发表时间:
1988
期刊:
影响因子:
--
通讯作者:
Agnello,V
中科院分区:
文献类型:
--
作者:
Agnello,V
It has been 50 years since rheumatoid factors (RFs) were discovered in the sera of patients with rheumatoid arthritis, but we still do not know the origin of these antibodies that react with IgG, nor do we know with certainty their role in rheumatoid arthritis and other diseases in which they occur. Considering the evolution of theories on the origin of RFs, it is curious that these antibodies were originally thought to be induced by streptococcal infection [15]. With the accumulation of evidence showing the reactivity of RFs with aggregated IgG, the concept evolved that RFs were antibodies to complexed or altered IgG. The studies of Henry Kunkel in the early 1960's, which showed that RFs reacted with normal monomeric IgG and that in high concentration monomeric IgG could inhibit the reaction between aggregated IgG and RF, disproved this hypothesis [22, 27, 38, 39]. With rare exception, RFs react with native monomeric IgG. The greater reactivity with aggregated IgG results from the multiplier effect on affinity from the five combining sites of IgM RF when it reacts with multiple antigenic sites present on complex IgG compared with the single site on monomeric IgG. The prevailing concept for many years was that RFs were autoantibodies to IgG that occurred in rheumatoid arthritis and other autoimmune diseases. An observation that questioned this concept was the detection of RFs in sub acute bacterial endocarditis [41]. This observation stimulated the studies of Charles Christian in the late 1960's in which he hyperimmunized rabbits with E. coli bacteria and produced RFs [18]. This led to the concept that RFs were induced by circulating immune complexes and raised the possibility that RFs may be antibodies produced not only in pathological states but also during physiological processes, such as immune elimination of circulating immune complexes. An observation that received little attention was made by Victor Bokisch during studies on the genetics of the immune response to streptococcal cell wall antigens in rabbits [10]. He found a rabbit that produced a 7S RF that cross-reacted with streptococcal cell wall antigen. This observation recalled the original theory that bacterial antigens induced RFs and again promoted the speculation that RF may be produced by antigens other than those on IgG. Another more