PLoS One:斑马鱼的眼外肌再生的后期需要胰岛素样生长因子的调控!

2018-02-09 cuiguizhong MedSci原创

美国密歇根州密歇根大学凯洛格眼科中心眼科与视觉科学系的Saera-Vila A近日在PLoS One杂志上发表了一项重要的工作,他们使用成年斑马鱼眼外肌(EOM)再生作为实验模型,发现Igf信号传导对斑马鱼EOM再生的后期阶段有重要的作用,主要作用于重新编程的成肌细胞重新分化的步骤。

美国密歇根州密歇根大学凯洛格眼科中心眼科与视觉科学系的Saera-Vila A近日在PLoS One杂志上发表了一项重要的工作,他们使用成年斑马鱼眼外肌(EOM)再生作为实验模型,发现Igf信号传导对斑马鱼EOM再生的后期阶段有重要的作用,主要作用于重新编程的成肌细胞重新分化的步骤。

胰岛素样生长因子(Igfs)是诸多生物过程(如胚胎发育,生长和组织修复与再生)的关键调节因子。 Igf在肌肉生成中的作用已有诸多研究,如在斑马鱼中促进鳍和心脏再生。然而,Igf在肌肉修复和再生中的作用机制尚不清楚。

作者使用成年斑马鱼眼外肌(EOM)再生作为实验模型,使用化学抑制剂(BMS754807和NVP-AEW541)或翻译阻断吗啉代寡核苷酸(MOs)减少EOM再生来阻断Igf1受体。斑马鱼EOMs再生取决于肌细胞去分化,这是由早期表观遗传重编程驱动的,需要自噬激活和细胞周期折返。

研究结果发现,抑制Igf信号对自噬活化或细胞增殖没有影响,表明Igf信号对再生的早期重编程阶段中影响不显着。相反,阻断Igf信号产生再生EOMs的细胞增殖并减少肌球蛋白的表达,甚至在损伤后数天内缺乏成熟的分化肌纤维,这表明Igf参与晚期再分化步骤。Akt激活被认为是肌源性Igf作用的主要介质,但作者发现,在再生EOM中Akt激活降低,这表明其他的替代信号途径可以介导肌肉再生中的Igf活性。

总之,Igf信号传导对斑马鱼EOM再生的后期阶段有重要的作用,主要作用于重新编程的成肌细胞重新分化的步骤。这项研究可以更好的理解肌肉再生的调节机制,确定再生的肌肉大小和分化的时机,并以此来进行再生治疗。

原文出处:

Saera-Vila, A., et al., Extraocular muscle regeneration in zebrafish requires late signals from Insulin-like growth factors. PLoS One, 2018. 13(2): p. e0192214

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    2018-12-01 baoya
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    2018-02-11 lg.zhao
  6. [GetPortalCommentsPageByObjectIdResponse(id=1809816, encodeId=fecb180981684, content=<a href='/topic/show?id=04878388e33' target=_blank style='color:#2F92EE;'>#胰岛素样#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=27, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=83887, encryptionId=04878388e33, topicName=胰岛素样)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=05202500204, createdName=minhuang75_72521584, createdTime=Wed Aug 01 04:55:00 CST 2018, time=2018-08-01, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1749922, encodeId=9f071e4992205, content=<a href='/topic/show?id=be7c8385345' target=_blank style='color:#2F92EE;'>#胰岛#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=27, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=83853, encryptionId=be7c8385345, topicName=胰岛)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=a7a536274692, createdName=baoya, createdTime=Sat Dec 01 13:55:00 CST 2018, time=2018-12-01, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1701076, encodeId=4d701e0107603, content=<a href='/topic/show?id=7a3fe274489' target=_blank style='color:#2F92EE;'>#眼外肌#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=29, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=72744, encryptionId=7a3fe274489, topicName=眼外肌)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=904b30322649, createdName=119337467, createdTime=Wed Aug 08 12:55:00 CST 2018, time=2018-08-08, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1790115, encodeId=39691e90115cf, content=<a href='/topic/show?id=6e4814388e2' target=_blank style='color:#2F92EE;'>#Plos one#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=25, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=14388, encryptionId=6e4814388e2, topicName=Plos one)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=fda6311, createdName=119337457, createdTime=Mon Dec 17 01:55:00 CST 2018, time=2018-12-17, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1420889, encodeId=5f12142088994, content=<a href='/topic/show?id=f4e85e9565c' target=_blank style='color:#2F92EE;'>#斑马鱼#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=24, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=57956, encryptionId=f4e85e9565c, topicName=斑马鱼)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=84283623605, createdName=lg.zhao, createdTime=Sun Feb 11 06:55:00 CST 2018, time=2018-02-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1517984, encodeId=b594151e9847b, content=<a href='/topic/show?id=aa2269613cd' target=_blank style='color:#2F92EE;'>#生长因子#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=19, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=69613, encryptionId=aa2269613cd, topicName=生长因子)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=3df311117154, createdName=12499e01m50暂无昵称, createdTime=Sun Feb 11 06:55:00 CST 2018, time=2018-02-11, status=1, ipAttribution=)]