衰老诱导miR-409降低CCL5的调节,并损害了内皮前代细胞的血管生成
Yen-Hung Chou1,2, Yi-Nan Lee3, Cheng-Huang Su3
1Department of Medicine, MacKay Medical College, New Taipei, Taiwan.
Journal of cellular and molecular medicine
|June 20, 2024
概括
降低的C-C动机化学基因连接体5 (CCL5) 在衰老中损害了内皮原生细胞 (EPC) 功能. 恢复CCL5可能会改善心血管健康,并提供衰老和风险评估的生物标志物.
科学领域:
- 心血管生物学 心血管生物学
- 细胞衰老 细胞衰老
- 再生医学是一种再生医学.
背景情况:
- 随着年龄的增长,内皮原生细胞 (EPC) 的数量和功能下降,影响心血管健康.
- 自分泌信号在与年龄相关的EPC功能障碍中的作用仍然不完全理解.
研究的目的:
- 调查衰老对人类EPCs中C-C动机化学因子连接体5 (CCL5) 的影响.
- 探索调节衰老EPC中CCL5的机制及其对血管新生活性的影响.
- 评估CCL5作为EPC衰老和心血管风险的生物标志物.
主要方法:
- 人类EPCs中的复制诱导衰老模型.
- 在体外和体内 (老鼠后肢缺血模型) 功能测试.
- 对CCL5.5微RNA调节的分析.
- 与健康捐赠者的临床数据进行相关性分析.
主要成果:
- 衰老的EPCs表现出减少的CCL5分泌和CCR5水平,导致血管新生活性受损.
- 通过CCR5/AKT/P70S6K通路,CCL5促进了EPC的扩散和血管内皮生长因子 (VEGF) 的分泌.
- 在衰老的EPC中对miR-409的上调降低了CCL5,抑制了血管生成,CCL5/VEGF添加抵消了这一效应.
- 在体内,CCL5的使用改善了衰老的EPC功能.
- 在人类中,较低的CCL5水平与年龄和Framingham风险评分有负相关.
结论:
- CCL5在维持EPC功能和血管生成能力方面发挥着至关重要的作用.
- 通过miR-409介导的CCL5抑制有助于EPC衰老.
- CCL5是评估EPC衰老和心血管风险的潜在生物标志物.
- 准CCL5可能为与年龄有关的心血管疾病提供治疗效益.
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