alexa Lowered expression of C3b receptor (CR1) on erythrocytes of rheumatoid arthritis patients.
Genetics & Molecular Biology

Genetics & Molecular Biology

Journal of Molecular Biomarkers & Diagnosis

Author(s): Kumar A, Malaviya AN, Srivastava LM

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Abstract The number of C3b receptors (CR1) on erythrocytes (E) has been quantitated by whole cell enzyme-linked immunosorbent assay (ELISA), using a monoclonal anti-CR1 antibody, in 46 healthy individuals as controls, 58 having rheumatoid arthritis (RA) and 3 hereditary angioedema patients. The mean value of CR1 in RA (381/E) was significantly lower (p < 0.001) when compared to normal controls (646/E). In hereditary angioedema patients CR1 numbers (620/E) were found to be comparable to normal values. No significant difference was found between normal male (708/E) and female (598/E) subjects. Among the patient groups, those on steroid therapy (352/E) showed no change compared to others not receiving such therapy (408/E). The cumulative frequency curve of CR1 in the normal population showed maximum inflection at 32\% and 82\%. This led us to conclude that there is a trimodal distribution of receptors in the control population. Such a contention is well supported by frequency histogram, when a small group interval (0-50) was chosen. However, if large group intervals (0-100 or 0-150) were considered, a very close approximation to unimodal pattern was obtained. The factors actually contributing to low receptor numbers are yet to be elucidated. This article was published in Immunobiology and referenced in Journal of Molecular Biomarkers & Diagnosis

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