益母草提取物对大鼠高尿酸血症的调控作用

该研究采用灌胃给予SD大鼠氧嗪酸钾(300 mg·kg·d)制备高尿酸血症模型, 并将其分为正常组、模型组、别嘌醇组、益母草提取物高、中、低剂量组(200, 100, 50 mg·kg·d), 给予氧嗪酸钾1 h后给药, 连续给药7 d。分别测定血清尿酸(serum uric acid, SUA), 肌酐(serum creatinine, SCre), 尿中尿酸(uric acid, UA)及肾脏中相关转运体的表达水平, 研究益母草提取物对高尿酸血症大鼠血尿酸、肾功能的影响及肾脏相关转运体的mRNA的调节作用。结果显示与模型组相比, 益母草提取物可以显著性降低高尿酸血症大鼠血清尿酸, 肌酐的水平, 升高尿尿酸水平;同时, 益母草提取物可以显著性下调肾脏尿酸盐转运体(urate transporter 1, URAT1), 葡萄糖转运蛋白9(glucose transporter 9, GLUT9) mRNA 的表达, 上调有机阳离子转运体(organic cation transportanter, OCT), 肉毒碱转运体(carnitine transporter, OCTN)mRNA的表达, 具有促进肾脏尿酸排泄的作用。

Regulatory effect of leonurus extracts on hyperuricemia in rats

In this study, SD rats were orally administrated with oteracil potassium (300 mg·kg·d) to prepare the hyperuricemia model, and divided into normal, model, Allopurinol, LE high dosage, middle dosage and low dose (200, 100, 50 mg·kg·d) groups. The rats were orally administrated with test drugs 1 hour later after being orally administrated with Oteracil potassium. After 7 days, serum uric acid, serum creatinine, uric acid and expression of relevant transporters in kidney were tested to study the regulatory effect of leonurus extracts on serum uric acid, renal function and relevant transporters in kidney of rats with hyperuricemia. Compared with the model group, the leonurus extract group could significantly down-regulate serum uric acid and creatinine levels of rats with hyperuricemia, and increase the urine uric acid level. Meanwhile, leonurus extracts could notably down-regulate the mRNA expressions of urate transporter 1 (URAT1) and glucose transporter 9 (GLUT9), up-regulate the mRNA expressions of organic cation transportanter (OCT) and Carnitine transporter (OCTN), and promote the excretion of uric acid of kidney.