CLIN CANCER RES:心脏损伤模型心肌细胞释放的胞外囊泡含有早期心肌损伤的分子标志

2018-04-24 MedSci MedSci原创

心脏损伤是肿瘤生存者主要的死亡原因,只有在损伤出现后才可以检测到其分子标志。胞外囊泡(EV)可以在血液中检测到。CLIN CANCER RES近期发表了一篇文章,研究循环EVs是否可以作为长期心脏损伤的早期诊断标志。

心脏损伤是肿瘤生存者主要的死亡原因,只有在损伤出现后才可以检测到其分子标志。胞外囊泡(EV)可以在血液中检测到。CLIN CANCER RES近期发表了一篇文章,研究循环EVs是否可以作为长期心脏损伤的早期诊断标志。

作者使用阿霉素(DOX)诱导心脏损伤鼠模型,分离血浆囊泡,分析蛋白质组成,检测DOX处理后释放的血浆EVs中氧化蛋白水平,研究EV内容物的改变情况。研究结果表明,DOX处理会导致循环EVs(DOX-EV)显着增加。DOX-EVs中一种与DOC诱导心肌毒性有关的脂质过氧化产物显着增加。DOX-EVs蛋白质组学分析发现了脑/心脏,肌肉和肝脏亚型的糖原磷酸化酶(GP),其来源分别为心脏,骨骼肌和肝脏。DOX-EVs中的脑/心脏GP(PYGB)与心脏中PYGB降低有关。锰超氧化物歧化酶(MnSOD)过表达,以及使用心脏保护药物和MnSOD类似物预处理,可以降低DOX处理的老鼠中EV相关PYGB水平。进一步研究证明含有PYGB的EVs在心肌肌钙蛋白升高前即释放入血,表明PYGB是心肌损伤的早期指标。

文章最后认为,含有PYGB的EVs是心脏损伤早期且敏感的分子标志。

原始出处:

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    2018-04-27 1222becem95暂无昵称

    学习了

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    2018-04-24 wqkm

    ^_^^_^^_^

    0

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