Circ-ABCA1促进氧化低密度脂蛋白诱导的炎症和血管光滑肌细胞中的表型切换
Fang Yu1, JiWei Liu2, Xiao Wei3
1Department of Cardiac Catheterization Room, Yantaishan Hospital, Yantai City, Shandong Province, China.
Clinics (Sao Paulo, Brazil)
|March 30, 2024
概括
循环RNA ABCA1 (circ-ABCA1) 通过增加血管光滑肌细胞中的炎症和细胞变化促进动脉样硬化. 针对circ-ABCA1/miR-885-5p/ROCK2通路可能为这种动脉疾病提供新的治疗方法.
科学领域:
- 心血管生物学 心血管生物学
- 分子医学是分子医学.
- 生物化学 生物化学
背景情况:
- 动脉样硬化 (AS) 是一种慢性炎症性动脉疾病,涉及人类血管光滑肌细胞 (HVSMC).
- 循环RNAs (circRNAs) 在氧化低密度脂蛋白 (ox-LDL) 诱导的HVSMC中的作用尚未完全理解.
- 研究AS病变的新型分子机制对于开发有效疗法至关重要.
研究的目的:
- 阐明牛LDL诱导的HVSMC中circRNAs的功能和机制.
- 确定circ-ABCA1在动脉样硬化的发展中的作用.
- 为了确定涉及血管光滑肌细胞中circ-ABCA1的分子相互作用.
主要方法:
- 在AS模型 (体外和体内) 中评估了Circ-ABCA1表达.
- 试验室研究涉及VSMC中的寡核酸转染,以分析增殖,迁移,炎症和表型切换.
- 在体内研究中,在小鼠中注射shRNA晶状病毒,然后对大动脉组织进行组织学检查.
- 研究了circ-ABCA1,miR-885-5p和ROCK2的相互作用网络.
主要成果:
- 在牛LDL诱导的VSMC和AS小鼠模型中,Circ-ABCA1显著过度表达.
- 沉默circ-ABCA1抑制了体外VSMC的增殖,迁移,炎症和表型切换.
- 在体内,circ-ABCA1敲击阻止了小鼠的AS发展.
- 从机理上来说,发现circ-ABCA1对miR-885-5p进行海绵作用,该海绵直接准ROCK2.2.
结论:
- 通过miR-885-5p/ROCK2轴,Circ-ABCA1加剧了ox-LDL诱导的VSMC炎症和表型切换.
- 该circ-ABCA1/miR-885-5p/ROCK2轴代表了一种潜在的新型治疗标和动脉样硬化的生物标志物.
- 这项研究为动脉样硬化进展的分子基础提供了新的见解.
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