[The correlation between serum uric acid level and early-phase insulin secretion in subjects with normal glucose regulation].

OBJECTIVE: To investigate the correlation between serum uric acid (SUA) level and early-phase insulin secretion in subjects with normal glucose regulation (NGR). METHODS: Totally 367 community NGR residents confirmed by a 75g oral glucose tolerance test were enrolled. The insulin resistance index (HOMA-IR) and the early-phase insulin secretion index after a glucose load (ΔI30/ΔG30) were used to estimate the insulin sensitivity and the early-phase insulin secretion, respectively. The subjects were divided into 4 groups according to the SUA level quartiles. Differences in early-phase insulin levels, ΔI30/ΔG30, and HOMA-IR were compared among the 4 groups. RESULTS: Age, BMI, waist circumference, systolic blood pressure, diastolic blood pressure, fasting insulin (FINS), 30 minutes postprandial insulin(30 minINS), 2 hours postprandial insulin(2hINS), HOMA-IR and TG levels increased across the rising categories of SUA levels, while the HDL-C was decreased across the SUA groups (P<0.01). The SUA level was positively correlated with age(r=0.157, P<0.01), BMI(r=0.262, P<0.01), waist circumference(r=0.372, P<0.01), systolic blood pressure(r=0.200, P<0.01), diastolic blood pressure(r=0.254, P<0.01), 30 minutes postprandial plasma glucose(r=0.118, P=0.023), FINS(r=0.249, P<0.01), 30minINS(r=0.189, P<0.01), 2hINS(r=0.206, P<0.01), glycosylated hemoglobin(HbA1c, r=0.106, P=0.042), HOMA-IR(r=0.244, P<0.01), TG(r=0.350, P<0.01), ΔI30/ΔG30(r=0.144, P<0.01), and negatively correlated with HDL-C level(r=-0.321, P<0.01). Multiple stepwise regression analysis showed that SUA(β=0.292, P<0.01) and HOMA-IR(β=29.821, P<0.01) were positively associated with ΔI30/ΔG30. CONCLUSION: SUA level is closely related with the early-phase insulin secretion in NGR subjects.