Circulation:动力相关蛋白1的结合伴侣MiDs参与有丝分裂调控,在肺动脉高压的病理过程中发挥重要作用

2018-07-23 MedSci MedSci原创

肺动脉高压(PAH)是一种高增殖、抗凋亡的疾病,其有丝分裂增强。动力相关蛋白(Drp1)必须与衔接蛋白形成复合物才可引发分裂。在实验性PAH上,Drp1诱导的分裂已用作治疗靶点。近期研究人员发现了两种新的Drp1衔接蛋白,大小为49和51kDa的线粒体动力蛋白(MiD49和MiD51),Kuang-Hueih Chen等人对其在正常的血管细胞中的作用以及其在PAH的异常情况进行探究。研究人员在肺动

肺动脉高压(PAH)是一种高增殖、抗凋亡的疾病,其有丝分裂增强。动力相关蛋白(Drp1)必须与衔接蛋白形成复合物才可引发分裂。在实验性PAH上,Drp1诱导的分裂已用作治疗靶点。近期研究人员发现了两种新的Drp1衔接蛋白,大小为49和51kDa的线粒体动力蛋白(MiD49和MiD51),Kuang-Hueih Chen等人对其在正常的血管细胞中的作用以及其在PAH的异常情况进行探究。

研究人员在肺动脉平滑肌细胞(对照6例、PAH8例)和肺段(对照6例、PAH6例)中检测MiD49和MiD51的表达水平,并在人类和啮齿类PAH肺动脉平滑肌细胞中评估其对细胞增殖、细胞周期和细胞凋亡的影响。同时检测参与MiD表达调控的microRNA(miR-34a-3p)的表达水平,并研究其在PAH的病理过程中如何调控MiDs。

MiD在PAH肺动脉平滑肌细胞中的表达增加,导致Drp1介导的有丝分裂加速,增加细胞增殖、减少细胞凋亡。沉默MiDs(但不干扰其他Drp1结合伴侣,分裂1或线粒体分裂因子)的表达可促进线粒体融合,并通过细胞外信号调节激酶1/2-和细胞周期依赖性激酶4-依赖性方式使细胞分裂周期停滞在G1期。在正常细胞过表达MiDs可引起分裂,再现PAH表型。降低MiR-34a-3p的表达可导致MiD表达上调。在PAH患者和PAH的预临床模型中,循环miR-34a-3p的表达量均降低。沉默MiDs或增强miR-34a-3p的表达量均可抑制实验性PAH。

在正常情况下,MiDs调节Drp-1介导的细胞分裂,但在患病情况下,MiDs上调增强有丝分裂,导致病理性增殖和抗凋亡。miR-34a-3p信号通路为PAH提供了新的治疗靶点。

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    2018-07-24 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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    2018-07-23 1ddf0692m34(暂无匿称)

    学习了,长知识

    0

  7. [GetPortalCommentsPageByObjectIdResponse(id=1925246, encodeId=a17b192524644, content=<a href='/topic/show?id=26d633354c9' target=_blank style='color:#2F92EE;'>#动脉高压#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=27, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=33354, encryptionId=26d633354c9, topicName=动脉高压)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=44a360, createdName=jklm09, createdTime=Sun Dec 09 08:05:00 CST 2018, time=2018-12-09, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2023521, encodeId=46fd2023521d6, content=<a href='/topic/show?id=57ce9605ef6' target=_blank style='color:#2F92EE;'>#重要作用#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=36, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=96057, encryptionId=57ce9605ef6, topicName=重要作用)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=8e4c53, createdName=jiyangfei, createdTime=Tue Nov 20 10:05:00 CST 2018, time=2018-11-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1521449, encodeId=10941521449a5, content=<a href='/topic/show?id=f52b605e618' target=_blank style='color:#2F92EE;'>#有丝分裂#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=39, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=60576, encryptionId=f52b605e618, topicName=有丝分裂)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=983f11348598, createdName=tamgche, createdTime=Wed Jul 25 13:05:00 CST 2018, time=2018-07-25, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1615852, encodeId=3b4c161585230, content=<a href='/topic/show?id=5882260898d' target=_blank style='color:#2F92EE;'>#伴侣#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=31, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=26089, encryptionId=5882260898d, topicName=伴侣)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=2b3b19689320, createdName=ms3892185887221420, createdTime=Wed Jul 25 13:05:00 CST 2018, time=2018-07-25, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1050809, encodeId=e523105080915, content=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。, beContent=null, objectType=article, channel=null, level=null, likeNumber=61, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=明天jing, createdTime=Tue Jul 24 01:05:00 CST 2018, time=2018-07-24, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=333678, encodeId=f8fe3336e843, content=学习了,长知识, beContent=null, objectType=article, channel=null, level=null, likeNumber=71, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20220115/46bcf39c32de4aa6b45c5f9d66c8ee77/6cb4a20c55bb4b7691122f47747bfca2.jpg, createdBy=9dad1662329, createdName=1ddf0692m34(暂无匿称), createdTime=Mon Jul 23 22:32:44 CST 2018, time=2018-07-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=333675, encodeId=da003336e5b0, content=学习了,谢谢分享, beContent=null, objectType=article, channel=null, level=null, likeNumber=73, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=7c592194322, createdName=1209e435m98(暂无昵称), createdTime=Mon Jul 23 22:32:24 CST 2018, time=2018-07-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=333668, encodeId=5adf333668b2, content=学习了,谢谢分享。, beContent=null, objectType=article, channel=null, level=null, likeNumber=65, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/xkvRjYnJzzRJ2R0y7VhicibvkjPWHjIMmu4ZpKnE9cWAu4lVicS3uDUCfF4M4JWvrkrYfpb2KehPV0Ee29tPqyPEebBUibiaKhnvD/0, createdBy=f8412001184, createdName=惠映实验室, createdTime=Mon Jul 23 22:30:51 CST 2018, time=2018-07-23, status=1, ipAttribution=)]
    2018-07-23 1209e435m98(暂无昵称)

    学习了,谢谢分享

    0

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    2018-07-23 惠映实验室

    学习了,谢谢分享。

    0

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