枸杞多糖提取物对顺铂诱发大鼠肾毒性的影响

Protective Effect of Lycium barbarum Polysaccharide against Cisplatin-induced Nephrotoxicity in Rats

目的:观察枸杞多糖(LBP)对顺铂所致肾毒性的防护作用,并初步探讨其作用机制。方法:将50只大鼠随机分为空白对照组、顺铂(CDDP)模型组、LBP低、中、高剂量组(277、554、1008g/(kg.d))(以体质量计)。空白对照组和CDDP组每天灌胃蒸馏水,LBP组每天灌胃LBP,每日1次,灌胃10d后,空白对照组腹腔注射生理盐水,其余各组一次性腹腔注射CDDP 7.0mg/kg建立肾损伤动物模型,之后继续灌胃5d。腹腔注射后第5天宰杀大鼠,检测大鼠血清尿素氮(BUN)、肌酐(Scr)的含量、肾组织中一氧化氮(NO)、丙二醛(MDA)含量和一氧化氮合酶(NOS)、超氧化物歧化酶(SOD)活性。结果:给予LBP可显著降低CDDP引起的BUN、Scr、MDA水平升高(P<0.05或P<0.01);并能降低CDDP导致的NO含量和NOS活性的升高(P<0.05或P<0.01)。结论:LBP经口给予能减轻CDDP所致的肾损伤,其机制可能与其降低NOS活性和MDA、NO含量有关。

Objective： To reveal the protective effect and possible mechanism ofLycium barbarum polysaccharide （LBP） against cisplatin （CDDP）-induced nephrotoxicity in rats. Methods： A total of 50 rats were randomly divided into blank control group, CDDP model group, and high-dose, medium-dose and low-dose LBP groups （orally administered at doses of 277, 554, 1008 g/（kg ~ d） respectively once daily for 15 days）. The blank control and CDDP model groups were both orally administered with distilled water during the adminstrtion period. After 10 days of administration, the blank control group was given normal saline by intraperito- neal injection while a single injection of CDDP in the remaining groups was carried out to establish a mouse model of renal injury. At the end of the administration period, all rats were sacrificed to determine serum BUN and Ser contents as well as NO and MDA contents and NOS and SOD activities in the kidney. Results： In the rats with CDDP-induced nephrotoxicity LBP pretreatment could significantly reduce the increase in serum BUN and Scr levels and kidney MDA and NO levels and NOS activity caused by CDDP （P〈0.05 or P〈0.01）. Conclusions： Oral intake of LBP ameliorates CDDP-induced renal dysfunction. The mechanism may be related to the decreased NOS activity and NO and MDA contents.