CELL:V型胶原蛋白可调节心脏损伤后疤痕的大小

2020-07-05 MedSci原创 MedSci原创

胶原蛋白V,心脏疤痕的次要成分,可以调节缺血性损伤后心脏疤痕的大小。胶原蛋白V的耗竭导致梗死后疤痕增大,以及心脏功能恶化。

心肌梗死后的疤痕组织大小是血管结局的独立预测因子,然而人们对调节疤痕大小的因素知之甚少。

最近,研究人员证明,胶原蛋白V,心脏疤痕的次要成分,可以调节缺血性损伤后心脏疤痕的大小。

胶原蛋白V的耗竭导致梗死后疤痕增大,以及心脏功能恶化。一个跨越100只小鼠的近亲繁殖品系的系统遗传学方法证明,胶原蛋白V是损伤后心脏功能的一个关键的驱动力。研究人员表明,胶原蛋白V的缺失改变了瘢痕组织的机械特性,基质和细胞之间的相互反馈改变诱导了机械敏感整合素的表达,这些整合素驱动成纤维细胞的激活,并增加瘢痕大小。

特异性整合素的抑制剂Cilengitide可以挽救胶原蛋白V缺陷小鼠心肌损伤后瘢痕增加的表型。

这些观察表明,胶原蛋白V以整合素依赖的方式调节疤痕大小。

 

原始出处:

Tomohiro Yokota et al. Type V Collagen in Scar Tissue Regulates the Size of Scar after Heart Injury, CELL (2020). DOI:https://doi.org/10.1016/j.cell.2020.06.030

 

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    2020-08-28 维他命
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    2020-07-07 HinsMax
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