细胞外矩阵刚度通过控制内皮膜膜信号来调节微血管稳定,以确定细胞命运
Yali Yu1,2,3, Yu Leng1,2, Xiuyue Song1,2
1Institute for Translational Medicine, The Affiliated Hospital of Qingdao University, Medical College, Qingdao University, China (Y.Y., Y. Leng, X.S., J.M., L.M., L.Y., Y.Z., J.L., D.W.).
Arteriosclerosis, thrombosis, and vascular biology
|August 31, 2023
概括
细胞外矩阵 (ECM) 刚性和TGFβ信号合作调节微血管稳定性. 刚性ECM促进内皮细胞ITGB1酸化和CTGF分泌,诱导周细胞-肌纤维细胞分化和纤维化.
科学领域:
- 生物医学工程 生物医学工程
- 细胞生物学 细胞生物学
- 组织工程是组织工程.
背景情况:
- 细胞分化成肌纤维细胞驱动纤维性疾病,导致微血管退化和ECM积累.
- 在微血管利基内,细胞周细胞-肌纤维细胞分化的调节仍然不清楚.
- 此前已经建立了一个新的2D共培平台,用于内皮细胞 (ECs) 和细胞周细胞.
研究的目的:
- 研究细胞外矩阵 (ECM) 刚性在调节微血管内皮细胞 (ECs),细胞周细胞及其相互作用中的作用.
- 阐明在响应机械线索的过程中,围细胞-肌纤维细胞分化背后的机制.
- 通过了解微血管动态来探索纤维化疾病的潜在治疗点.
主要方法:
- 主要的微容器是在软 (≈6 kPa) 或硬的ECM基板上培养的.
- 使用了免疫染,RNA测序,RT-qPCR,西式涂抹和基因淘汰实验.
- 转化生长因子β (TGFβ) 信号抑制剂 (A83-01) 用于调节路径.
主要成果:
- 刚性ECM诱导了细胞周细胞分化成肌纤维细胞 (NG2+αSMA+),即使有TGFβ抑制.
- 软ECM和TGFβ抑制维持了微血管稳定性,并抑制了周细胞激活 (NG2+αSMA-/低).
- 综合素β1 (Itgb1) 被确定为一个关键的机械传感器;它的敲击抑制了肌纤维细胞分化.
- 内皮细胞ITGB1酸化 (Y783) 在刚性ECM上促进了连接组织生长因子 (CTGF) 的分泌,诱导细胞周区分.
结论:
- 电脑膜硬度和TGFβ信号协同控制微血管稳定性和周细胞-肌纤维细胞分化.
- 刚性ECM增强内皮细胞ITGB1酸化和CTGF释放,驱动纤维化.
- 准ITGB1和CTGF通路可能为在纤维状况下对抗微血管功能障碍提供策略.
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