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- W2023392298 abstract "SUMMARY Rheumatoid arthritis (RA) is an autoimmune disease and rheumatoid factor (RF), anti-IgG, has been implicated in the pathogenesis, but the exact etiology remains unclear. There are data to suggest an infectious trigger to the autoimmune process, and mycobacteria are considered a candidate. Immunization of various animals with mycobacterial heat shock protein 65 (mhsp65) protects against subsequent autoimmune arthritis in a number of experimental models. Elevated anti-mhsp65 titres have been demonstrated in RA patients, together with specific T cells isolated from inflamed synovium. Mycobacterial hsp65 has also been implicated in other autoimmune disease and in atherosclerosis. The anti-mhsp65 and RF (IgG, IgM and IgA isotypes) titres were assayed by ELISA in 123 pairs of normal twins (61 monozygotic and 62 dizygotic, age 14–79 years), to examine the population distribution and inter-relationship of these antibodies. In addition, we studied the effects of age, sex, genetics and environment on antibody titres, IgG-RF and IgM-RF were detectable in all subjects and IgA-RF in 41 subjects. None of the RF isotypes showed any significant dependence on age or sex. There was a statistically significant correlation between twins for the IgG-RF and IgM-RF, and a positive but not significant correlation for the IgA-RF. All three correlations were stronger for monozygotic than dizygotic twins, reaching statistical significance for IgM-RF (P < 0.001), and this indicates that there is a genetic influence on RF titres. Anti-mhsp65 titres were detectable in 90.5% of the study group with a range of 0.15–19.7 AU/ml. There were weak correlations between twins, stronger for dizygotic than monozygotic twins. This suggests that familial influences on anti-mhsp65 titres are very small, with no evidence of any genetic influence at all. There was no significant relationship of anti-mhsp65 titre with age, sex or RF titres." @default.
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- W2023392298 date "1995-09-01" @default.
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- W2023392298 title "Antimycobacterial hsp65 and rheumatoid factor titres in a population of normal twins: evidence of genetic control of rheumatoid factor" @default.
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- W2023392298 doi "https://doi.org/10.1111/j.1365-2249.1995.tb03125.x" @default.
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