首页> 外文期刊>Life sciences >ET(A)/ET(B) receptor antagonist bosentan inhibits neointimal development in collared carotid arteries of rabbits.
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ET(A)/ET(B) receptor antagonist bosentan inhibits neointimal development in collared carotid arteries of rabbits.

机译:ET(A)/ ET(B)受体拮抗剂波生坦抑制兔颈状颈动脉的新内膜发育。

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摘要

The contribution of endothelin to the genesis of neointimal development in collared rabbit carotid arteries, a widely accepted model of atherosclerosis, was investigated. Three sets of rabbits were studied. In the first group, a non-occlusive, biologically inert silastic collar was positioned around the right carotid artery of the rabbit. In another group, the application of the collar was accompanied by endothelial denudation via a Fogarty arterial balloon catheter, while the third group of animals underwent only endothelial denudation. After two weeks, intimal hyperplasia of a similar degree was observed in all groups. The administration of the nonselective ET(A)/ET(B) receptor antagonist Bosentan, significantly reduced both the neointimal area and the intima/media area ratio in all groups. However, the beneficial effects of Bosentan were less pronounced in balloon injured vessels than in collared ones. The results of the present study indicate that i) endothelin has a key role in the development of intimal hyperplasia following arterial collaring, ii) the contribution of endothelin to intimal hyperplasia is greater in collared arteries that in balloon injured ones, and iii) the nonselective ET(A)/ET(B) receptor antagonists are potential tools for the prevention of intimal hyperplasia.
机译:研究了内皮素对颈兔颈动脉新内膜发育的起源的贡献,颈动脉是一种广为接受的动脉粥样硬化模型。研究了三组兔子。在第一组中,在兔子的右颈动脉周围放置了一个非阻塞的,生物惰性的硅橡胶项圈。在另一组中,通过Fogarty动脉球囊导管应用颈环进行内皮剥脱术,而第三组动物仅进行内皮剥脱术。两周后,在所有组中均观察到相似程度的内膜增生。非选择性ET(A)/ ET(B)受体拮抗剂波生坦的使用显着降低了所有组的新内膜面积和内膜/中膜面积比。然而,波森坦的有益作用在气囊损伤的血管中不如在颈圈血管中明显。本研究的结果表明,i)内皮素在动脉颈圈炎后内膜增生的发展中起着关键作用; ii)颈圈动脉中的内皮素对内膜增生的贡献要大于球囊损伤的内膜增生,并且iii)非选择性ET(A)/ ET(B)受体拮抗剂是预防内膜增生的潜在工具。

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