Cell:减少MYC蛋白的表达竟然可延年益寿

2015-02-13 佚名 生物谷

MYC是较早发现的原癌基因,可通过染色体易位导致癌症的发生。但近日,John M.Sedivy团队却发现减少MYC蛋白的表达竟然可以延年益寿。   Myc基因包括C-myc,N-myc,L-myc,分别定位于8号染色体、2号染色体和1号染色体。Myc基因表达的MYC蛋白是一个非常多效的转录因子,染色体易位可导致MYC异常活化从而可促进癌症的发生。尽管不同肿瘤中myc基因易位的具体

MYC是较早发现的原癌基因,可通过染色体易位导致癌症的发生。但近日,John M.Sedivy团队却发现减少MYC蛋白的表达竟然可以延年益寿。

 

Myc基因包括C-mycN-mycL-myc,分别定位于8号染色体、2号染色体和1号染色体。Myc基因表达的MYC蛋白是一个非常多效的转录因子,染色体易位可导致MYC异常活化从而可促进癌症的发生。尽管不同肿瘤中myc基因易位的具体位置不同,但共同之处是改变了其正常表达的调控机制,使其异常活化。但是,作者发现Myc杂合子(Myc+/-)小鼠比野生型小鼠更长寿。这些小鼠表现出对如骨质疏松、心脏纤维化、免疫衰老等年龄相关的病理过程的一种天然的抵抗。同时,他们更活泼、代谢率高而且脂代谢更健康。转录组学分析显示代谢和免疫相关的基因出现富集表达。MYC最基本的作用是调控核糖体生成,MYC减少反映在蛋白转录水平的降低,与长寿呈现负相关。同时,作者观察了营养和能量感应信号通路的变化,发现血清IGF-1表达水平降低,AMPK 活性升高,AKTTOR,和S6K的活性降低。与其它长寿的动物模型相比,Myc+/-小鼠在应激控制通路中并没有明显的改善。因此,该项研究表明MYC的活性对于哺乳动物的寿命来讲是非常重要的调节因子。

原始出处

Hofmann JW1, Zhao X1, De Cecco M1, Peterson AL1, Pagliaroli L1, Manivannan J1, Hubbard GB2, Ikeno Y2, Zhang Y3, Feng B4, Li X5, Serre T5, Qi W2, Van Remmen H2, Miller RA6, Bath KG5, de Cabo R3, Xu H4, Neretti N1, Sedivy JM7.Reduced Expression of MYC Increases Longevity and Enhances Healthspan.Cell. 2015 Jan 29

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    2015-10-06 维他命
  4. [GetPortalCommentsPageByObjectIdResponse(id=1951400, encodeId=d23f195140036, content=<a href='/topic/show?id=637349503a9' target=_blank style='color:#2F92EE;'>#延年益寿#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=22, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=49503, encryptionId=637349503a9, topicName=延年益寿)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=1072181, createdName=wjywjy, createdTime=Fri May 01 10:09:00 CST 2015, time=2015-05-01, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1869025, encodeId=3cc2186902597, content=<a href='/topic/show?id=fd764459a8' target=_blank style='color:#2F92EE;'>#Cell#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=25, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4459, encryptionId=fd764459a8, topicName=Cell)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=524d95, createdName=zhaozhouchifen, createdTime=Wed Aug 12 03:09:00 CST 2015, time=2015-08-12, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1959276, encodeId=cd4d19592e692, content=<a href='/topic/show?id=dbe6445416' target=_blank style='color:#2F92EE;'>#CEL#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=16, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=4454, encryptionId=dbe6445416, topicName=CEL)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c3ff68, createdName=维他命, createdTime=Tue Oct 06 10:09:00 CST 2015, time=2015-10-06, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=16661, encodeId=bba416661a4, content=非常好的文章,学习, beContent=null, objectType=article, channel=null, level=null, likeNumber=92, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=f2fb1607679, createdName=orthoW, createdTime=Sat Feb 21 10:46:00 CST 2015, time=2015-02-21, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=16584, encodeId=3952165843c, content=很不错学习了, beContent=null, objectType=article, channel=null, level=null, likeNumber=87, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=f2fb1607679, createdName=orthoW, createdTime=Fri Feb 20 09:16:00 CST 2015, time=2015-02-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=15690, encodeId=f68215690f3, content=小编评论亮了, beContent=null, objectType=article, channel=null, level=null, likeNumber=57, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c68e1614119, createdName=windmilL1989, createdTime=Mon Feb 16 13:45:00 CST 2015, time=2015-02-16, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1274792, encodeId=c16912e47929e, content=<a href='/topic/show?id=1bbc12404ba' target=_blank style='color:#2F92EE;'>#MYC#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=21, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=12404, encryptionId=1bbc12404ba, topicName=MYC)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=66ec123, createdName=guihongzh, createdTime=Sun Feb 15 00:09:00 CST 2015, time=2015-02-15, status=1, ipAttribution=)]
    2015-02-21 orthoW

    非常好的文章,学习

    0

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    2015-02-20 orthoW

    很不错学习了

    0

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    2015-02-16 windmilL1989

    小编评论亮了

    0

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    2015-02-15 guihongzh

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