Exp Biol Med:好心做坏事儿!心脏成纤维细胞竟会导致心脏病!

2018-04-19 佚名 “细胞”微信号

一项近日发表在《Experimental Biology and Medicine》的文章发现心脏的支持细胞(也就是成纤维细胞)可以选择性地被心脏病中存在的因子激活。这项研究由南加州大学生物医学工程系和干细胞生物学及再生医学系副教授Megan McCain博士领导,表明免疫细胞分泌的转化生长因子-beta1(TGF-b1)是心肌成纤维细胞的主要激活因子,促进了疤痕组织的形成。

一项近日发表在《Experimental Biology and Medicine》的文章发现心脏的支持细胞(也就是成纤维细胞)可以选择性地被心脏病中存在的因子激活。这项研究由南加州大学生物医学工程系和干细胞生物学及再生医学系副教授Megan McCain博士领导,表明免疫细胞分泌的转化生长因子-beta1(TGF-b1)是心肌成纤维细胞的主要激活因子,促进了疤痕组织的形成。

血管疾病是目前美国的最大死因,每年造成了3200亿美元的医疗开支。心肌梗死(最常见的心血管疾病)会导致心脏肌肉细胞局部死亡。由于心肌细胞无法再生,伤口处就会形成疤痕。而疤痕组织就是在成纤维细胞对免疫细胞分泌的化学因子及环境刺激做出反应时产生的。过量的疤痕组织将导致心脏输出减少并导致心衰。因此调节成纤维细胞激活的因子可以被用于治疗相关疾病。

这项由McCain博士及其同事进行的研究表明力学信号(刚性)和化学信号(TGF-b1)可以独立或者联合激活心肌成纤维细胞。人原代心肌成纤维细胞被培养在工程化支架上,分三种不同的刚性,同时加入或者不加入TGF-b1。结果显示成纤维细胞主要被TGF-b1激活。该研究共同作者、南加州大学生物医学工程系研究生科研助理Nathan Cho说道:“明白TGF-b1和基质刚性对成纤维细胞激活的相对贡献将帮助我们发现心脏病的新疗法。”McCain博士则认为他们的数据帮助他们确定了与心脏病相关的组织环境的改变如何影响成纤维细胞。他们下一步的计划就是研究组织环境变化如何影响心脏细胞和成纤维细胞之间的相互作用。

《Experimental Biology and Medicine》杂志主编Steven R. Goodman博士说:“McCain及其同事的研究表明TGF-b1是心肌成纤维细胞分化的主要因素。他们进一步研究表明清除TGF-b1可以使成纤维细胞的表型发生部分逆转。这使得TGF-b1以及其Smad信号通路成为了心肌梗死后降低心肌纤维化的潜在靶标。”

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    2018-06-04 sunylz
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    2018-04-19 有备才能无患

    一项近日发表在的文章发现心脏的支持细胞(也就是成纤维细胞)可以选择性地被心脏病中存在的因子激活.这项研究由南加州大学生物医学工程系和干细胞生物学及再生医学系副教授MeganMcCain博士领导.表明免疫细胞分泌的转化生长因子-beta1(TGF-b1)是心肌成纤维细胞的主要激活因子.促进了疤痕组织的形成.

    0

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    2018-04-19 131****1460

    学习了受益匪浅

    0

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