| 摘 要： | Objectives To explore the relationship between serum autoantibodies against myocardialβ1-adrenergic, M2-cholinergic receptors and chronic Keshan disease (CKD). Methods The second extracellular loops ofβ1 and M2 receptors on human cardiomyocytes were used as the antigens. Enzyme linked immunosorbent assay (ELISA) was applied to determine serum autoantibodies against myocardialβ1 and M2 receptors in 32 CKD patients. 31 healthy subjects from endemic area were selected as the control. Results Positive rate of autoantibodies against myocardialβ1 adrenergic (51.3%, 17/32) and M2 cholinergic (56.3% , 18/32) receptors were significantly higher than those in the control (9.7%, 3/ 31; 12.9%, 4/31) (both P< 0.01). Both positive rate and liters of above autoantibodies in NYHAⅡ-ⅢCKD patients were significantly higher than those in NYHAⅣ, demonstrating an apparently positive correlation between serum antibodies against myocardialβ1 and M2 receptors (r=0.95). Conclusions Autoantibodies against myocardialβ1 and M2 receptors were found in sera of CKD patients; distribution of positive rate and liters of the auloanlibodies in CKD patients in various NYHA classes of cardiac function are significantly different.
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