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中国临床药理学与治疗学 ›› 2015, Vol. 20 ›› Issue (1): 24-30.

• 基础研究 • 上一篇    下一篇

芝麻素联用维生素E对化学性肾损伤大鼠eNOS/iNOS表达的影响

宣佳利, 杨解人, 王欢, 姚海, 李伟, 赵梦秋, 韩军   

  1. 皖南医学院药理学教研室,国家中医药管理局中药药理三级实验室,芜湖 241002,安徽
  • 收稿日期:2014-09-02 修回日期:2014-11-10 发布日期:2020-07-20
  • 通讯作者: 韩军,通信作者,男,博士,副教授,研究方向:临床药理学。Tel:0553-3932607 E-mail:aku110@163.com
  • 作者简介:宣佳利,女,硕士在读,研究方向:临床药理学。Tel:18119886119 E-mail:478651597@qq.com
  • 基金资助:
    安徽省教育厅自然科学基金项目(kj2011B200)

Effects of sesamin combined with vitamin E on the expression of eNOS/iNOS in chemically-induced renal injury rats

XUAN Jia-li, YANG Jie-ren, WANG Huan, YAO Hai, LI Wei, ZHAO Meng-qiu, HAN Jun   

  1. Department of Pharmacology, Third-Grade Pharmacology Laboratory of State, Administration of Traditional Chinese Medicine, Wannan Medical College, Wuhu 241002, Anhui, China
  • Received:2014-09-02 Revised:2014-11-10 Published:2020-07-20

摘要: 目的: 探讨芝麻素(Ses)和维生素E(VE)联用对化学性肾损伤大鼠的保护作用及其对内皮型一氧化氮合酶(eNOS)/诱导型一氧化氮合酶(iNOS)表达的影响。方法: SD大鼠28只给予D-半乳糖(D-gal,180 mg·kg-1·d-1,i.p.)和三氯化铝(AlCl3,15 mg·kg-1·d-1,i.g.)20周建立化学性肾损伤模型。于造模第13周将大鼠随机分成模型组(生理盐水,NS,5.0 mL·kg-1·d-1)、Ses组(160 mg·kg-1·d-1)、维生素E组(VE, 10 mg·kg-1·d-1)及Ses +VE组(160 mg·kg-1·d-1+10 mg·kg-1·d-1),按设定剂量分别灌胃给药8周,另设正常对照组(生理盐水,NS,5.0 mL·kg-1·d-1,i.g.)。末次给药后称体质量(BW)和肾湿重(HWW);化学比色法测肾组织一氧化氮(NO)、总抗氧化能力(T-AOC)、超氧化物歧化酶(SOD)和丙二醛(MDA)含量;HE和Masson染色分别观察肾脏病理组织学和胶原纤维变化;免疫组化法测iNOS阳性细胞表达;Western Blot测eNOS蛋白表达。结果: 与模型组相比,Ses、VE 和Ses+VE组能明显减轻肾脏病理组织损伤和胶原纤维沉积;降低肾匀浆NO、MDA含量,提高T-AOC、SOD活性;上调肾脏eNOS蛋白表达,下调iNOS蛋白表达,且疗效Ses +VE组优于单用Ses、VE组(P<0.05,P<0.01)。结论: Ses 联用VE对抗化学性肾损伤大鼠的保护作用可能与其减少自由基产生,提高抗氧化能力,上调肾脏eNOS蛋白,下调iNOS蛋白,恢复eNOS/iNOS表达的异常有关,且疗效优于单用Ses和VE。

关键词: 芝麻素, 维生素E, 肾脏, 诱导型一氧化氮合酶, 内皮型一氧化氮合酶

Abstract: AIM: To investigate the protective effects of sesamin combined with vitamin E on chemically-induced renal injury and its modulation of the expression of endothelial nitric oxide synthase (eNOS) and inducible nitric oxide synthase (iNOS) in rats. METHODS: Twenty-eight Sprague-Dawley (SD) rats were used to establish kidney impaired model by using D-gal (180 mg·kg-1·d-1,i.p.) and AlCl3 (15 mg·kg-1·d-1,i.g.) for 20 weeks. A single dose of either Ses (160 mg·kg-1·d-1) or VE (10 mg·kg-1·d-1) and combined dose of Ses+VE (160 mg·kg-1·d-1 and 10 mg·kg-1·d-1) were given to rats at 13th week post-renal injury induction for 8 consecutive weeks, while control rats were given NS (5.0 mL·kg-1·d-1). Bilateral kidneys from each rat were isolated to determine wet weight, nitric oxide (NO) and malondialdehyde (MDA) contents, the activities of total antioxidant capacity (T-AOC) and superoxide dismutase (SOD) were also determined at the end of the experiment. Hematoxylin & eosin (HE) and Masson stain were used to observe the renal morphology and collagen deposition. Immunohistochemical technique and western blotting were employed respectively to detect the iNOS and eNOS expression. RESULTS: As compared with the model rats, the levels of NO, SOD and T-AOC were significantly increased, and the MDA content was decreased in rats treated with Ses and (or) VE. The positive expression of eNOS was apparently up-regulated by down-regulating the iNOS level and the effects of Ses plus VE was better than single Ses or VE group(P<0.05,P<0.01). CONCLUSION: The renoprotective effect ofsesamin combined with vitamin E on chemically-induced renal injury in rats could be associated with decrease in free radical generation, increase in anti-oxidant activity, promotion of eNOS, inhibition of iNOS activity, restoration of eNOS/iNOS balance, Ses plus VE treatment was more effective than Ses or VE given as a single treatment (monotherapy).

Key words: sesamin, vitamin E, kidney, iNOS, eNOS

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