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JAHA:线粒体损伤介导肺动脉高压引起的死亡

2019-02-27 不详 MedSci原创

肺动脉高压(PAH)是一种没有有效治疗手段的严重疾病,肺血管阻力增加导致右室应变力下降,最终患者死于右室衰竭。Sprague-Dawley大鼠接受SU5416注射,缺氧可促进严重的PAH形成,并伴随肺血管的损伤,尽管该大鼠模型有右室纤维化,但是不会死亡。近期有研究表明Fischer 大鼠(CDF)接受同样的处理会出现死亡,本研究的目的旨在评估PAH Fischer 大鼠具体的病理学变化特征。本研究

肺动脉高压(PAH)是一种没有有效治疗手段的严重疾病,肺血管阻力增加导致右室应变力下降,最终患者死于右室衰竭。Sprague-Dawley大鼠接受SU5416注射,缺氧可促进严重的PAH形成,并伴随肺血管的损伤,尽管该大鼠模型有右室纤维化,但是不会死亡。近期有研究表明Fischer 大鼠(CDF)接受同样的处理会出现死亡,本研究的目的旨在评估PAH Fischer 大鼠具体的病理学变化特征。

本研究将Fischer 大鼠注射SU5416和缺氧处理达三周,之后氧量维持正常。超过90%的大鼠在注射后6周内出现死亡,尸检显示胸腔积液、右心室肥大扩张、肝肿大和其他充血性心力衰竭的迹象。时间进程研究显示PAH大鼠出现肺动脉逐渐增厚,形成同心片状和丛状病变,以及右室纤维化。透射电镜显示肌丝、T管和肌浆网的破坏。另外,在Fischer 大鼠中发现了Sprague-Dawley大鼠没有的右室线粒体损伤。

研究结果显示,右室线粒体的损伤在肺动脉高压致死中扮演着重要角色。

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    2019-03-01 zhaohui6731
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    2019-02-27 明天jing

    肺动脉高压表面是罕见病,事实上临床上并不少见,治疗药物虽然有一些,但是整体仍然不理解,可能未来需要采用综合治疗措施。

    0

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