食品科学 ›› 2017, Vol. 38 ›› Issue (23): 219-223.doi: 10.7506/spkx1002-6630-201723035

• 营养卫生 • 上一篇    下一篇

茶多酚对果糖诱导的高尿酸血症大鼠血尿酸水平的影响及机制

陈 刚1,贾 萍2   

  1. 1.重庆工商大学环境与资源学院,重庆市天然药物研究重点实验室,重庆 400067;2.重庆医科大学附属第一医院中西医结合科,重庆 400016
  • 出版日期:2017-12-15 发布日期:2017-12-07
  • 基金资助:
    重庆市科委前沿与应用基础研究计划一般项目(cstc2016jcyja0475);重庆市教委科学技术研究项目(KJ1400626)

Effect and Mechanism of Green Tea Polyphenols on Serum Level of Uric Acid in Rats with Fructose-Induced Hyperuricemia

CHEN Gang1, JIA Ping2   

  1. 1. Chongqing Key Laboratory of Nature Medicine Research, College of Environment and Resources, Chongqing Technology and Business University, Chongqing 400067, China; 2. Department of Combination of Chinese and Western Medicine, the First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
  • Online:2017-12-15 Published:2017-12-07

摘要: 目的:观察茶多酚(green tea polyphenols,GTP)对果糖诱导的高尿酸血症(hyperuricemia,HUA)大 鼠血尿酸水平的影响,并从调节尿酸产生和排泄途径探讨其药理机制。方法:连续给予大鼠10 g/100 mL果糖溶 液8 周,其中5~8 周分别连续灌胃别嘌呤醇(4 mg/(kg·d))或GTP(75、150、300 mg/(kg·d)),每天 1 次。磷钨酸法检测血尿酸水平,比色法和Western blot法分别检测肝脏黄嘌呤氧化酶(xanthine oxidase,XOD) 活力及其表达水平,免疫组织化学染色法检测肾脏中尿酸盐转运子(urate transporter,UAT)、尿酸盐阴离子转运 子(urate-anion transporter,URAT)1和葡萄糖转运子(glucose transporter,GLUT)9的表达水平。结果:150、 300 mg/(kg·d)GTP显著降低了果糖诱导的HUA大鼠血尿酸水平(P<0.05,P<0.01)。同时,150、 300 mg/(kg·d) GTP显著降低了HUA大鼠肝脏XOD活力和表达水平(P<0.05,P<0.01),显著增 强了肾脏UAT表达水平和降低了肾脏URAT1和GLUT9的表达水平(P<0.05,P<0.01)。结论:150、 300 mg/(kg·d) GTP可有效降低果糖诱导的HUA大鼠血尿酸水平,其机制与减少尿酸产生和促进尿酸排泄密切相关。

关键词: 茶多酚, 果糖, 高尿酸血症, 黄嘌呤氧化酶, 尿酸转运子

Abstract: Objective: To investigate the effect of green tea polyphenols (GTP) on the serum level of uric acid in fructoseinduced hyperuricemic rats, and explore the potential mechanism. Methods: Rats were fed with 10 g/100 mL fructose solution for 8 weeks to induce hyperuricemia. Meanwhile, allopurinol (API) at 4 mg/(kg·d) and GTP at 75, 150 or 300 mg/ (kg·d) were intragastrically administered separately to the rats once daily during the fifth to eighth week. Uric acid level in serum was examined by the phosphotungstic acid method. Meantime, the activity and expression of xanthine oxidase (XOD) in liver were tested. In addition, the expression of urate transporter (UAT), urate-anion transporter (URAT) 1 and glucose transporter (GLUT) 9 in kidney were analyzed. Results: 150、300 mg/(kg·d) GTP significantly decreased the serum level of uric acid in fructose-induced hyperuricemic rats (P < 0.05, P < 0.01). At the same time, 150、300 mg/(kg·d) GTP markedly reduced the activity and expression of XOD in the live of hyperuricemic rats (P < 0.05, P < 0.01). Finally, GTP markedly enhanced UAT expression and reduced the expression of URAT1 and GLUT9 in the kidney of hyperuricemic rats (P < 0.05, P < 0.01). Conclusion: 150、300 mg/(kg·d) GTP can decrease the serum level of uric acid in fructose-induced hyperuricemic rats through both reducing uric acid production and promoting uric acid excretion.

Key words: green tea polyphenols, fructose, hyperuricemia, xanthine oxidase, urate transporters

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