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拉斯诱导血管光滑肌肉细胞衰老和炎症在人类动脉样硬化
Tohru Minamino1, Toshihiko Yoshida, Kaoru Tateno
1Department of Cardiovascular Science and Medicine, Chiba University Graduate School of Medicine, 1-8-1 Inohana, Chuo-ku, Chiba 260-8670, Japan.
Circulation
|October 15, 2003
概括
拉斯激活诱导血管光滑肌细胞衰老和炎症,导致动脉样硬化. 这一发现表明了治疗这种常见的血管疾病的新型抗衰老疗法.
科学领域:
- 心血管生物学 心血管生物学
- 细胞衰老 细胞衰老
- 疾病的分子机制.
背景情况:
- 血管细胞经历衰老,一种与衰老和血管疾病相关的有限生长停止.
- 拉斯信号涉及到动脉动脉的刺激和细胞衰老.
- 这项研究调查了Ras诱导的血管光滑肌细胞 (VSMC) 在动脉生成中的衰老.
研究的目的:
- 探索Ras信号在诱导VSMC衰老中的作用.
- 确定Ras诱导的VSMC衰老是否有助于动脉样硬化的发展.
主要方法:
- 人类VSMC被一个激活的H-rasV12等位基因感染.
- 编码H-rasV12的腺病毒载体被用来在受伤后转化大脑动脉.
- 分析了衰老标志物 (例如SA-β-gal) 和炎症性细胞因子表达.
主要成果:
- H-rasV12的引入在体外诱导了VSMC衰老,其特点是增长停止和衰老标志物的增加.
- 拉斯激活通过细胞外信号调节激酶 (ERK) 激活来调节上升的益炎性细胞因子.
- 在体内,Ras激活在受伤的老鼠动脉中增强了炎症和衰老.
- 在人类动脉样硬化病变中发现了表达高ERK活性和细胞因子的衰老VSMC.
结论:
- 拉斯介导的动脉动脉刺激诱导VSMC衰老和血管炎症,促进动脉动脉生成.
- 这一途径提供了一种新的机制,有助于动脉样硬化发展.
- 准VSMC衰老是一种潜在的动脉样硬化治疗策略.
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