中国神经再生研究(英文版) ›› 2016, Vol. 11 ›› Issue (2): 345-351.doi: 10.4103/1673-5374.177745

• 原著:周围神经损伤修复保护与再生 • 上一篇    下一篇

依帕司他为何可用于治疗糖尿病周围神经病变?

  

  • 收稿日期:2015-12-22 出版日期:2016-02-15 发布日期:2016-02-15
  • 基金资助:

    国家自然科学基金(81060141)

Epalrestat protects against diabetic peripheral neuropathy by alleviating oxidative stress and inhibiting polyol pathway

Qing-rong Li 1, Zhuo Wang 1, Wei Zhou 2, Shou-rui Fan 1, Run Ma 1, Li Xue 1, Lu Yang 1, Ya-shan Li 2, Hong-li Tan 2, Qing-hua Shao 2,Hong-ying Yang 1   

  1. 1 Second Affiliated Hospital of Kunming Medical University, Department of Clinical Laboratory, Kunming, Yunnan Province, China
    2 Third People’s Hospital of Yunnan Province, Kunming, Yunnan Province, China
  • Received:2015-12-22 Online:2016-02-15 Published:2016-02-15
  • Contact: Hong-ying Yang, M.D., yyh8657@163.com.
  • Supported by:

    The present study was supported by a grant from the National Natural Science Foundation of China, No. 81060141.

摘要:

依帕司他是一个治疗糖尿病周围神经病变的醛糖还原酶抑制剂,实验以此设想依帕司他能够通过抑制糖尿病大鼠外周神经组织中抗氧化酶以及醛糖还原酶的表达来产生保护糖尿病周围神经损伤的作用。作者采用链脲佐菌素腹腔注射法建立高脂高糖模型大鼠,高血糖持续8周后大鼠产生了周围神经病变,术后12周以依帕司他100 mg/(kg.d)灌胃6周。透射电镜观察显示,大鼠坐骨神经有髓神经纤维、无髓神经纤维、许旺细胞的结构损伤明显减轻。Western blot 和免疫组织化学结果显示,依帕司他干预使抗氧化酶如超氧化物歧化酶、过氧化氢酶、谷胱甘肽过氧化物酶的活性逐渐升高,醛糖还原酶蛋白表达逐渐降低。结果证实依帕司他可通过减轻氧化应激损伤及抑制多元醇通路发挥保护糖尿病周围神经病变的作用。

关键词: 神经再生, 周围神经损伤, 链脲佐菌素, 活性氧族, 糖尿病神经病变, 氧化应激, 抗氧化酶, 醛糖还原酶, 多元醇途径, 醛糖还原酶抑制剂, 超氧化物歧化酶, 氧化氢酶, 谷胱甘肽过氧化物酶, 大鼠, 国家自然科学基金

Abstract:

Epalrestat is a noncompetitive and reversible aldose reductase inhibitor used for the treatment of diabetic neuropathy. This study assumed that epalrestat had a protective effect on diabetic peripheral nerve injury by suppressing the expression of aldose reductase in peripheral nerves of diabetes mellitus rats. The high-fat and high-carbohydrate model rats were established by intraperitoneal injection of streptozotocin. Peripheral neuropathy occurred in these rats after sustaining high blood glucose for 8 weeks. At 12 weeks after streptozotocin injection, rats were intragastrically administered epalrestat 100 mg/kg daily for 6 weeks. Transmission electron microscope revealed that the injuries to myelinated nerve fibers, non-myelinated nerve fibers and Schwann cells of rat sciatic nerves had reduced compared to rats without epalrestat administuation. Western blot assay and immunohistochemical results demonstrated that after intervention with epalrestat, the activities of antioxidant enzymes such as superoxide dismutase, catalase and glutathione peroxidase gradually increased, but aldose reductase protein expression gradually diminished. Results confirmed that epalrestat could protect against diabetic peripheral neuropathy by relieving oxidative stress and suppressing the polyol pathway.

Key words: nerve regeneration, peripheral nerve injury, streptozotocin, reactive oxygen species, diabetic neuropathy, oxidative stress, aldose reductase, antioxidant enzymes, polyol pathway, aldose reductase inhibitor, superoxide dismutase, catalase, glutathione peroxidase, rats, NSFC grant, neural regeneration