血清素对血管内皮细胞的米托基效应
R Pakala1, J T Willerson, C R Benedict
1Department of Internal Medicine, University of Texas Medical School-Houston 77030.
Circulation
|October 1, 1994
概括
血清素 (5-HT) 促进内皮细胞生长,帮助血管在受伤后愈合. 这种代效应由5-HT2受体介导,这对细胞增殖至关重要.
科学领域:
- 血管生物学 血管生物学
- 细胞信号传递 细胞信号传递
- 生物化学 生物化学
背景情况:
- 已知血清素 (5-HT) 能促进各种细胞类型的生长,包括光滑肌肉细胞.
- 血管损伤,例如血管塑造术后,导致内皮细胞损伤和血小板聚合,释放5-HT.
- 在受伤部位增加的5-HT可能会作为内皮细胞的线粒原体.
研究的目的:
- 为了研究血清素 (5-HT) 对内皮细胞的影响.
- 为了确定5-HT诱导的内皮细胞增殖的机制.
- 评估5-HT在血管愈合中的作用.
主要方法:
- 评估了 [3H] 提米丁被纳入犬类和牛类大动脉内皮细胞的DNA.
- 测量了在5-HT刺激后绝对内皮细胞数量的增加.
- 利用5-HT2受体抗剂和百日咳毒素来研究信号通路.
主要成果:
- 在200-1000mmol/L的度下,5-HT显著增加了内皮细胞中的 [3H] 提米丁结合和细胞数量.
- 纤维细胞对5-HT.没有表现出对5-HT.的代反应.
- 增殖效应是由与G蛋白合的5-HT2受体介导的,正如对抗剂和百日咳毒素的逆转所表明的那样.
结论:
- 血清素 (5-HT) 在与血管损伤部位相关的度下作为内皮细胞的线粒原体.
- 5-HT诱导的内皮细胞增殖很可能是通过5-HT2受体进行的.
- 这些促进生长的效应可能有助于血管内脏在损伤后的愈合.
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