Expression of androgen and its receptor in patients with primary gouty arthritis / 中华风湿病学杂志

ABSTRACT

Objective To measure the level of androgen receptor (AR) mRNA in peripheral blood monocytes (PBMCs) and serum testosterone level of patients with gouty arthritis (GA) and healthy controls (HC),and to explore the role of testosterone and AR in the pathogenesis of GA.Methods Chemilluminescence was used to detect the level of serum testosterone in GA [including 119 acute GA (AGA) and 60 nonacute GA (NAGA) patients] and 47 HC group.Real-time quantitative polymerase chain reaction (RT-qPCR)was used to measure AR mRNA in PBMCs from 41 GA and 35 HC.Western blotting was used to measure PBMCs AR in GA and HC for each 6 cases.One-way ANOVA,t test and Spearman's correlation were adopted for statistical analysis.Results Serum testosterone was significantly reduced in AGA and NAGA group compared to that in HC group [(6.1±1.5) ng/ml,P＜0.01,respectively],and the expression was lower in the AGA [(3.7±1.4) ng/ml] group [(4.9±2.0) ng/ml] than that in the NAGA group (P＜0.01).The level of AR mRNA and protein was much lower in the GA group than that in the HC group (P＜0.01,respectively).Negative correlations was detected between AR mRNA and uric acid in GA patients.There was negative correlation between serum testosterone and VLDL,GLU; meanwhile,positive correlation was found between serum testosterone and HDL (P＜0.05,respectively) in NAGA patients.There were no correlations between testosterone and other laboratory data.There was no correlation between AR and other laboratory data in GA patients and healthy controls (P＞0.05,respectively).Conclusion Altered expression of testosterone and its receptor may be involved in the pathogenesis of gouty inflammation.Further study will be needed to shed light on the exact role of androgen and AR in gout.