控制损伤后动脉病变的发展的因素
M A Reidy1, J Fingerle, V Lindner
1Department of Pathology, School of Medicine, University of Washington, Seattle 98195.
Circulation
|December 1, 1992
概括
基本纤维细胞生长因子 (bFGF) 是受伤动脉中光滑肌肉细胞 (SMC) 复制的关键线粒原体. 血小板衍生生长因子 (PDGF) 主要促进SMC在动脉损伤后向内脏迁移.
科学领域:
- 血管生物学 血管生物学
- 细胞生物学 细胞生物学
- 再生医学是一种再生医学.
背景情况:
- 动脉损伤触发了光滑肌肉细胞 (SMC) 的增殖,这是血管修复和疾病的关键过程.
- 增长因子的具体作用,如血小板衍生增长因子 (PDGF) 和基本纤维细胞增长因子 (bFGF),在SMC对损伤的反应中尚未完全阐明.
研究的目的:
- 调查PDGF和bFGF在引发SMC复制和迁移以应对动脉损伤时的不同作用.
- 为了确定导致SMC在受伤后复制的主要菌原因子.
主要方法:
- 鼠的动脉接受了各种损伤模型,包括气球导管和内皮脱皮.
- 诱导血小板减少是为了评估血小板在SMC复制中的作用.
- 在受伤之前,针对bFGF的抗体被施用以阻止其活动.
- 量化了SMC复制和迁移到intima的情况.
主要成果:
- 单独的内皮切除和血小板粘附并没有始终诱导SMC复制.
- 血小板减少并没有影响气球受伤后早期的SMC复制.
- 虽然PDGF对SMC复制的影响很小,但显著增强了SMC迁移.
- bFGF在脱皮动脉中对SMCs表现出强烈的线索性活性,但在未受损动脉中并非如此.
- 用抗体抑制bFGF显著减少了气球受伤后的SMC复制.
结论:
- 在体内,bFGF被确定为一个关键的线粒原体,在动脉损伤后启动SMC复制.
- PDGF作为一种化学作用剂发挥着重要作用,引导SMC进入亲密.
- 这些发现区分了关键生长因子在血管修复复杂过程中的作用.
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