eLife:心肌细胞为何不能再生?

2015-08-07 佚名 生物谷

人类和其他所有哺乳动物在出生后不久,大部分心肌细胞复制能力就消失。这个过程是如何发生以及是否能够恢复这种能力甚至再生心肌细胞,这些问题的解答都仍然未知。最近发表在eLife上的一篇研究中,德国的一群科学家们找到了这些问题的一个可能的解释。中心体几乎存在于每一个细胞中。近年来许多实验证实,如果中心体不完整,细胞就不能再复制。这个发现后,问题又提升到如果中心体的完整性被操纵的话,在什么程度就可以控制细

人类和其他所有哺乳动物在出生后不久,大部分心肌细胞复制能力就消失。这个过程是如何发生以及是否能够恢复这种能力甚至再生心肌细胞,这些问题的解答都仍然未知。最近发表在eLife上的一篇研究中,德国的一群科学家们找到了这些问题的一个可能的解释。

中心体几乎存在于每一个细胞中。近年来许多实验证实,如果中心体不完整,细胞就不能再复制。这个发现后,问题又提升到如果中心体的完整性被操纵的话,在什么程度就可以控制细胞的复制速度?(这针对研究肿瘤细胞这种不受控制复制或有相当重要的意义)而FAU(Friedrich-Alexander-Universit?t Erlangen-Nürnberg)的这群研究者研究了中心体完整性是否在动物界被自然调节,以便控制某些细胞的再生。他们的研究发现,心肌细胞中的中心体在出生后不久就被分解。这分解过程包括各种中心体蛋白质离开中心体并重新定位于细胞核膜上。出生后的心肌细胞无法纤毛再生(ciliogenesis),细胞核膜变成细胞微管组织中心。中心体分解成两个中心粒,失去完整性。他们观察到心肌细胞中心体分解能促进G0 / G1期的细胞期停滞,表明中心体分解是哺乳动物心肌细胞达到有丝分裂后状态所必须的过程,细胞在这后失去了复制的能力。

研究人员还发现成年斑马鱼和蝾螈的心肌细胞仍然能够复制,其中心体保持完整性。这是第一次确认哺乳动物的心肌细胞和那些斑马鱼、栖动物的显著差异,也呈现人心肌细胞不能再生的一个可能解释。

这个研究表明哺乳动物的心肌细胞调节中心体完整性有一个自然过程,也开辟了一系列今后研究的新可能。首先,这一观察为将来试图刺激心脏肌细胞的复制增殖,创造再生的心脏的研究提供了一个起点。与此同时,利用检查中心体完整性来寻找仍然保持复制能力的成年心肌细胞,或可利用于临床医疗。最后,这个发现还将帮助研究人员开发抑制生长不受控制的癌细胞的方法。

原文出处:

版权声明:
本网站所有内容来源注明为“梅斯医学”或“MedSci原创”的文字、图片和音视频资料,版权均属于梅斯医学所有。非经授权,任何媒体、网站或个人不得转载,授权转载时须注明来源为“梅斯医学”。其它来源的文章系转载文章,或“梅斯号”自媒体发布的文章,仅系出于传递更多信息之目的,本站仅负责审核内容合规,其内容不代表本站立场,本站不负责内容的准确性和版权。如果存在侵权、或不希望被转载的媒体或个人可与我们联系,我们将立即进行删除处理。
在此留言
评论区 (6)
#插入话题
  1. [GetPortalCommentsPageByObjectIdResponse(id=1972937, encodeId=6f0919e2937e1, content=<a href='/topic/show?id=72d566e3a6' target=_blank style='color:#2F92EE;'>#eLife#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=24, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=6673, encryptionId=72d566e3a6, topicName=eLife)], attachment=null, authenticateStatus=null, createdAvatar=http://thirdqq.qlogo.cn/qqapp/1103841572/C2EFD5CFB07FE291138AD4FD0C98E3DE/100, createdBy=e3d52500031, createdName=膀胱癌, createdTime=Mon Sep 07 04:37:00 CST 2015, time=2015-09-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2068435, encodeId=0aab2068435f2, content=<a href='/topic/show?id=59371088215' target=_blank style='color:#2F92EE;'>#Life#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=24, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=10882, encryptionId=59371088215, topicName=Life)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=fc8528, createdName=clmlylxy, createdTime=Fri Oct 02 07:37:00 CST 2015, time=2015-10-02, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=35416, encodeId=2a0e35416c5, content=挺有意思的, beContent=null, objectType=article, channel=null, level=null, likeNumber=96, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=59781606904, createdName=children5656, createdTime=Tue Aug 11 07:29:00 CST 2015, time=2015-08-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=35417, encodeId=8b6c3541e8f, content=挺有意思的, beContent=null, objectType=article, channel=null, level=null, likeNumber=97, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=59781606904, createdName=children5656, createdTime=Tue Aug 11 07:29:00 CST 2015, time=2015-08-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=35355, encodeId=7e0535355bc, content=学习了...., beContent=null, objectType=article, channel=null, level=null, likeNumber=122, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://login.medsci.cn/upload/avatar/4eede92d92b34bf1fd1b2b40bb23c44e/a96a8ea28b9d587cb6d7478315a44858.jpg, createdBy=26c71636411, createdName=jjjjjjboy1009, createdTime=Mon Aug 10 11:54:00 CST 2015, time=2015-08-10, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=35297, encodeId=894b3529e5f, content=期待干细胞的进展, beContent=null, objectType=article, channel=null, level=null, likeNumber=156, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=ed101627734, createdName=Messichen1992, createdTime=Sat Aug 08 19:10:00 CST 2015, time=2015-08-08, status=1, ipAttribution=)]
    2015-09-07 膀胱癌
  2. [GetPortalCommentsPageByObjectIdResponse(id=1972937, encodeId=6f0919e2937e1, content=<a href='/topic/show?id=72d566e3a6' target=_blank style='color:#2F92EE;'>#eLife#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=24, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=6673, encryptionId=72d566e3a6, topicName=eLife)], attachment=null, authenticateStatus=null, createdAvatar=http://thirdqq.qlogo.cn/qqapp/1103841572/C2EFD5CFB07FE291138AD4FD0C98E3DE/100, createdBy=e3d52500031, createdName=膀胱癌, createdTime=Mon Sep 07 04:37:00 CST 2015, time=2015-09-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2068435, encodeId=0aab2068435f2, content=<a href='/topic/show?id=59371088215' target=_blank style='color:#2F92EE;'>#Life#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=24, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=10882, encryptionId=59371088215, topicName=Life)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=fc8528, createdName=clmlylxy, createdTime=Fri Oct 02 07:37:00 CST 2015, time=2015-10-02, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=35416, encodeId=2a0e35416c5, content=挺有意思的, beContent=null, objectType=article, channel=null, level=null, likeNumber=96, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=59781606904, createdName=children5656, createdTime=Tue Aug 11 07:29:00 CST 2015, time=2015-08-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=35417, encodeId=8b6c3541e8f, content=挺有意思的, beContent=null, objectType=article, channel=null, level=null, likeNumber=97, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=59781606904, createdName=children5656, createdTime=Tue Aug 11 07:29:00 CST 2015, time=2015-08-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=35355, encodeId=7e0535355bc, content=学习了...., beContent=null, objectType=article, channel=null, level=null, likeNumber=122, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://login.medsci.cn/upload/avatar/4eede92d92b34bf1fd1b2b40bb23c44e/a96a8ea28b9d587cb6d7478315a44858.jpg, createdBy=26c71636411, createdName=jjjjjjboy1009, createdTime=Mon Aug 10 11:54:00 CST 2015, time=2015-08-10, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=35297, encodeId=894b3529e5f, content=期待干细胞的进展, beContent=null, objectType=article, channel=null, level=null, likeNumber=156, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=ed101627734, createdName=Messichen1992, createdTime=Sat Aug 08 19:10:00 CST 2015, time=2015-08-08, status=1, ipAttribution=)]
    2015-10-02 clmlylxy
  3. [GetPortalCommentsPageByObjectIdResponse(id=1972937, encodeId=6f0919e2937e1, content=<a href='/topic/show?id=72d566e3a6' target=_blank style='color:#2F92EE;'>#eLife#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=24, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=6673, encryptionId=72d566e3a6, topicName=eLife)], attachment=null, authenticateStatus=null, createdAvatar=http://thirdqq.qlogo.cn/qqapp/1103841572/C2EFD5CFB07FE291138AD4FD0C98E3DE/100, createdBy=e3d52500031, createdName=膀胱癌, createdTime=Mon Sep 07 04:37:00 CST 2015, time=2015-09-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2068435, encodeId=0aab2068435f2, content=<a href='/topic/show?id=59371088215' target=_blank style='color:#2F92EE;'>#Life#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=24, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=10882, encryptionId=59371088215, topicName=Life)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=fc8528, createdName=clmlylxy, createdTime=Fri Oct 02 07:37:00 CST 2015, time=2015-10-02, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=35416, encodeId=2a0e35416c5, content=挺有意思的, beContent=null, objectType=article, channel=null, level=null, likeNumber=96, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=59781606904, createdName=children5656, createdTime=Tue Aug 11 07:29:00 CST 2015, time=2015-08-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=35417, encodeId=8b6c3541e8f, content=挺有意思的, beContent=null, objectType=article, channel=null, level=null, likeNumber=97, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=59781606904, createdName=children5656, createdTime=Tue Aug 11 07:29:00 CST 2015, time=2015-08-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=35355, encodeId=7e0535355bc, content=学习了...., beContent=null, objectType=article, channel=null, level=null, likeNumber=122, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://login.medsci.cn/upload/avatar/4eede92d92b34bf1fd1b2b40bb23c44e/a96a8ea28b9d587cb6d7478315a44858.jpg, createdBy=26c71636411, createdName=jjjjjjboy1009, createdTime=Mon Aug 10 11:54:00 CST 2015, time=2015-08-10, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=35297, encodeId=894b3529e5f, content=期待干细胞的进展, beContent=null, objectType=article, channel=null, level=null, likeNumber=156, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=ed101627734, createdName=Messichen1992, createdTime=Sat Aug 08 19:10:00 CST 2015, time=2015-08-08, status=1, ipAttribution=)]
    2015-08-11 children5656

    挺有意思的

    0

  4. [GetPortalCommentsPageByObjectIdResponse(id=1972937, encodeId=6f0919e2937e1, content=<a href='/topic/show?id=72d566e3a6' target=_blank style='color:#2F92EE;'>#eLife#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=24, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=6673, encryptionId=72d566e3a6, topicName=eLife)], attachment=null, authenticateStatus=null, createdAvatar=http://thirdqq.qlogo.cn/qqapp/1103841572/C2EFD5CFB07FE291138AD4FD0C98E3DE/100, createdBy=e3d52500031, createdName=膀胱癌, createdTime=Mon Sep 07 04:37:00 CST 2015, time=2015-09-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2068435, encodeId=0aab2068435f2, content=<a href='/topic/show?id=59371088215' target=_blank style='color:#2F92EE;'>#Life#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=24, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=10882, encryptionId=59371088215, topicName=Life)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=fc8528, createdName=clmlylxy, createdTime=Fri Oct 02 07:37:00 CST 2015, time=2015-10-02, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=35416, encodeId=2a0e35416c5, content=挺有意思的, beContent=null, objectType=article, channel=null, level=null, likeNumber=96, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=59781606904, createdName=children5656, createdTime=Tue Aug 11 07:29:00 CST 2015, time=2015-08-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=35417, encodeId=8b6c3541e8f, content=挺有意思的, beContent=null, objectType=article, channel=null, level=null, likeNumber=97, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=59781606904, createdName=children5656, createdTime=Tue Aug 11 07:29:00 CST 2015, time=2015-08-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=35355, encodeId=7e0535355bc, content=学习了...., beContent=null, objectType=article, channel=null, level=null, likeNumber=122, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://login.medsci.cn/upload/avatar/4eede92d92b34bf1fd1b2b40bb23c44e/a96a8ea28b9d587cb6d7478315a44858.jpg, createdBy=26c71636411, createdName=jjjjjjboy1009, createdTime=Mon Aug 10 11:54:00 CST 2015, time=2015-08-10, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=35297, encodeId=894b3529e5f, content=期待干细胞的进展, beContent=null, objectType=article, channel=null, level=null, likeNumber=156, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=ed101627734, createdName=Messichen1992, createdTime=Sat Aug 08 19:10:00 CST 2015, time=2015-08-08, status=1, ipAttribution=)]
    2015-08-11 children5656

    挺有意思的

    0

  5. [GetPortalCommentsPageByObjectIdResponse(id=1972937, encodeId=6f0919e2937e1, content=<a href='/topic/show?id=72d566e3a6' target=_blank style='color:#2F92EE;'>#eLife#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=24, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=6673, encryptionId=72d566e3a6, topicName=eLife)], attachment=null, authenticateStatus=null, createdAvatar=http://thirdqq.qlogo.cn/qqapp/1103841572/C2EFD5CFB07FE291138AD4FD0C98E3DE/100, createdBy=e3d52500031, createdName=膀胱癌, createdTime=Mon Sep 07 04:37:00 CST 2015, time=2015-09-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2068435, encodeId=0aab2068435f2, content=<a href='/topic/show?id=59371088215' target=_blank style='color:#2F92EE;'>#Life#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=24, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=10882, encryptionId=59371088215, topicName=Life)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=fc8528, createdName=clmlylxy, createdTime=Fri Oct 02 07:37:00 CST 2015, time=2015-10-02, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=35416, encodeId=2a0e35416c5, content=挺有意思的, beContent=null, objectType=article, channel=null, level=null, likeNumber=96, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=59781606904, createdName=children5656, createdTime=Tue Aug 11 07:29:00 CST 2015, time=2015-08-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=35417, encodeId=8b6c3541e8f, content=挺有意思的, beContent=null, objectType=article, channel=null, level=null, likeNumber=97, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=59781606904, createdName=children5656, createdTime=Tue Aug 11 07:29:00 CST 2015, time=2015-08-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=35355, encodeId=7e0535355bc, content=学习了...., beContent=null, objectType=article, channel=null, level=null, likeNumber=122, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://login.medsci.cn/upload/avatar/4eede92d92b34bf1fd1b2b40bb23c44e/a96a8ea28b9d587cb6d7478315a44858.jpg, createdBy=26c71636411, createdName=jjjjjjboy1009, createdTime=Mon Aug 10 11:54:00 CST 2015, time=2015-08-10, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=35297, encodeId=894b3529e5f, content=期待干细胞的进展, beContent=null, objectType=article, channel=null, level=null, likeNumber=156, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=ed101627734, createdName=Messichen1992, createdTime=Sat Aug 08 19:10:00 CST 2015, time=2015-08-08, status=1, ipAttribution=)]
    2015-08-10 jjjjjjboy1009

    学习了....

    0

  6. [GetPortalCommentsPageByObjectIdResponse(id=1972937, encodeId=6f0919e2937e1, content=<a href='/topic/show?id=72d566e3a6' target=_blank style='color:#2F92EE;'>#eLife#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=24, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=6673, encryptionId=72d566e3a6, topicName=eLife)], attachment=null, authenticateStatus=null, createdAvatar=http://thirdqq.qlogo.cn/qqapp/1103841572/C2EFD5CFB07FE291138AD4FD0C98E3DE/100, createdBy=e3d52500031, createdName=膀胱癌, createdTime=Mon Sep 07 04:37:00 CST 2015, time=2015-09-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2068435, encodeId=0aab2068435f2, content=<a href='/topic/show?id=59371088215' target=_blank style='color:#2F92EE;'>#Life#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=24, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=10882, encryptionId=59371088215, topicName=Life)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=fc8528, createdName=clmlylxy, createdTime=Fri Oct 02 07:37:00 CST 2015, time=2015-10-02, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=35416, encodeId=2a0e35416c5, content=挺有意思的, beContent=null, objectType=article, channel=null, level=null, likeNumber=96, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=59781606904, createdName=children5656, createdTime=Tue Aug 11 07:29:00 CST 2015, time=2015-08-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=35417, encodeId=8b6c3541e8f, content=挺有意思的, beContent=null, objectType=article, channel=null, level=null, likeNumber=97, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=59781606904, createdName=children5656, createdTime=Tue Aug 11 07:29:00 CST 2015, time=2015-08-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=35355, encodeId=7e0535355bc, content=学习了...., beContent=null, objectType=article, channel=null, level=null, likeNumber=122, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://login.medsci.cn/upload/avatar/4eede92d92b34bf1fd1b2b40bb23c44e/a96a8ea28b9d587cb6d7478315a44858.jpg, createdBy=26c71636411, createdName=jjjjjjboy1009, createdTime=Mon Aug 10 11:54:00 CST 2015, time=2015-08-10, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=35297, encodeId=894b3529e5f, content=期待干细胞的进展, beContent=null, objectType=article, channel=null, level=null, likeNumber=156, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=ed101627734, createdName=Messichen1992, createdTime=Sat Aug 08 19:10:00 CST 2015, time=2015-08-08, status=1, ipAttribution=)]
    2015-08-08 Messichen1992

    期待干细胞的进展

    0

相关资讯

Cell:挑战120年再生医学教条

人们普遍认为,出生后不久哺乳动物中的心肌细胞就停止了增殖,限制了损伤后心脏的自我修复能力。现在,来自埃默里大学医学院等机构的研究人员在《细胞》(Cell)杂志上报告称,在青春期前小鼠中的心肌细胞经历了短暂的爆发性增殖,数量上增加了 40%,使得心脏能够满足快速生长期机体的循环需求。这些研究结果表明,甲状腺激素治疗可以刺激这一过程,提高心脏病患者的心脏再生能力。论文资深作者、埃默里大学医学院 Ahs

STM:用损坏的旧心脏培养出新心脏?

因为现在得心脏病的几率很高,我们可以经常听到人们发出绿野仙踪里铁皮人的感叹:“如果我能有一个新的心脏就好了。 ” 事实上,大约3%的美国人在20岁左右就心脏病发作,而心脏病一旦发作,给心脏留下的损伤是不可逆转的,并会导致心力衰竭,严重的心律失常甚至死亡。长期以来,让心肌再生被视作治疗心脏病的良方,可是对此的研究进程很缓慢。之前大部分的研究都集中于诱导干细胞或始祖细胞并让它们分化成新的心肌细胞。O'

PNAS:年轻人心肌细胞可以再生

  波士顿儿童医院研究人员首次发现,年轻人(婴儿、儿童、青少年)能够产生新的心肌细胞。这些发现驳斥了长期公认的观念:出生后人类心肌增长只是单一的现存细胞的扩大(而不是心肌细胞数量的增长)。同时这些研究结果也提高了科学家通过刺激心肌细胞再生治疗损伤心肌的可能性。   该研究发现:年轻人心肌细胞增殖促进了出生后心脏生长。其结果发表在了2013年1月7号至1月11号的最新的《美国国家科学院院刊》网络版

Circulation:哺乳类动物的心肌再生进程中心肌细胞转录过程会发生逆转

哺乳类动物的心肌再生进程中心肌细胞转录过程会发生逆转虽然新生小鼠在心脏受到损伤后可以自我修复,但这种能力会在出生一周后丧失。目前的研究还未在分子水平上明白这种让哺乳类动物心肌再生的转录变化是怎么发生的。这个研究的目标是希望能确定心肌细胞是否能逆转转录表现使得心肌细胞恢复到分化程度较少的形态。同时,研究者们系统的分析了基因转录的资料以求能找到并证实这个过程的潜在基因调节子。【相关报道:STM:用损坏

Cell子刊:如何修补“破碎的心”

最近,美国索尔克生物研究所的研究人员,通过再激活动物细胞中存在的长期休眠的分子机制,治愈了活体小鼠的受损心脏,这一发现可以帮助人类心脏疾病的新疗法铺平道路。这一新的研究结果,发表在2014年11月6日的Cell Stem Cell杂志,该研究表明,尽管成年哺乳动物通常不能再生受损组织,但是它们可能保留一种潜在的能力。当索尔克研究人员阻断四种被认为抑制这些再生器官程序的分子时,他们发现,小鼠心脏再生

Nat Commun:药理学家绘制出心肌细胞表观基因组

近日研究发现,药理学家已经成功地绘制出心肌细胞的表观基因组。他们希望这一发现引起有关先天性心脏病和慢性心力衰竭的新见解。科学家们在《自然通讯》杂志上发表了相关内容。表观基因组是表观遗传机制的总体,表观遗传机制决定细胞中哪些基因是活跃的,哪些基因是不活跃的。内部或环境条件的变化,如营养、压力、或药物,可以留下表观遗传模式。这样的机制在癌症的发展过程中发挥重要作用,但它对心脏病的意义还不太为人所知。