中国神经再生研究(英文版) ›› 2015, Vol. 10 ›› Issue (4): 589-593.doi: 10.4103/1673-5374.155432

• 原著:脑损伤修复保护与再生 • 上一篇    下一篇

增强脑缺血后海马血流量及舒张基底动脉血管:体内外模型证实抗高血压药DDPH的神经保护效应

  

  • 收稿日期:2015-03-16 出版日期:2015-04-22 发布日期:2015-04-22
  • 基金资助:

    中国国家自然科学基金项目(81173038),交通运输部长江航务管理局项目(201210011),武汉市卫计委临床医药项目(WX14D12)

Enhancing hippocampal blood flow after cerebral ischemia and vasodilating basilar arteries: in vivo and in vitro neuroprotective effect of antihypertensive DDPH

Li Sun 1, 2, Qin Li 3, Wei-ting Wang 2, Yu-hua Chen 1,  Lian-jun Guo 2   

  1. 1 Department of Neurology, Wuhan Brain Hospital (General Hospital of the Yangtze River Shipping), Wuhan, Hubei Province, China
    2 Department of Pharmacology, Tongji Medical College of Huazhong University of Science and Technology, Wuhan, Hubei Province, China
    3 Department of Pharmacology, Shanghai First People’s Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
  • Received:2015-03-16 Online:2015-04-22 Published:2015-04-22
  • Contact: Yu-hua Chen, whchyh@163.com.
  • Supported by:

    This study was financially supported by grants from the National Natural Science Foundation of China, No. 81173038; Yangtz River Navigational Matters Authority of Ministry of Transport of China, No. 201210011; and Clinical Medicine Research Program of Wuhan Health Planning Commission of China, No. WX14D12.

摘要:

为深入了解美西律和维拉帕米合成的新型抗高血压剂DDPH能够在体内外产生舒张血管及神经保护作用。实验以脑缺血大鼠模型及兔离体基底动脉血管为体内外模型,体内实验发现DDPH(10 mg/kg)能显著增加脑缺血模型大鼠海马的血流量,体外实验发现DDPH抑制His和KCl诱导的离体基底动脉收缩作用,且效果呈剂量依赖性。同时DDPH (3×10-5 M)能显著抑制His刺激的细胞外钙离子内流和细胞内钙释放。说明DDPH在体内和体外均具有血管舒张作用,这种作用发挥了对缺血神经组织的保护效应。

关键词: 神经再生, DDPH, 脑缺血, 海马, 血流量, 离体基底动脉, 剂量-反应曲线

Abstract:

1-(2,6-Dimethylphenoxy)-2-(3,4-dimethoxyphenylethylamino)-propane hydrochloride (DDPH) is a novel antihypertensive agent based on structural characteristics of mexiletine and verapamine. We investigated the effect of DDPH on vasodilatation and neuroprotection in a rat model of cerebral ischemia in vivo, and a rabbit model of isolated basilar arteries in vitro. Our results show that DDPH (10 mg/kg) significantly increased hippocampal blood flow in vivo in cerebral ischemic rats, and exerted dose-dependent relaxation of isolated basilar arteries contracted by histamine or KCl in the in vitro rabbit model. DDPH (3 × 10–5 M) also inhibited histamine-stimulated extracellular calcium influx and intracellular calcium release. Our findings suggest that DDPH has a vasodilative effect both in vivo and in vitro, which mediates a neuroprotective effect on ischemic nerve tissue.

Key words: nerve regeneration, DDPH, cerebral ischemia, hippocampus, blood flow, isolated basilar artery, dose-response curve, NSFC grant, neural regeneration