Oncotarget:小分子"化合物H"诱导抗衰老基因Klotho的表达!

2017-08-21 Emma MedSci原创

Klotho基因是根据传说中掌握人生命线的希腊女神命名的,它与哺乳动物的抗衰老作用相关。Kl基因的产物即Kl蛋白能增强细胞对氧化胁迫的抗性,从而起到延长寿命的作用。

Klotho基因是根据传说中掌握人生命线的希腊女神命名的,它与哺乳动物的抗衰老作用相关。Kl基因的产物即Kl蛋白能增强细胞对氧化胁迫的抗性,从而起到延长寿命的作用。此外,越来越多的证据表明Kl表达的增加可能对年龄相关疾病如动脉硬化和糖尿病的治疗有益。因此,Kl蛋白可能对开发抗衰老药物有潜在的作用,诱导Kl可能是老年相关疾病发病的有效治疗策略。

Kl表达水平随着老化而成比例地下降,但是减少的分子机制在很大程度上是未知的,在老龄的恒河猴中发现Kl CpG岛上DNA甲基化的增加。有研究报道了几种转录因子和小分子能够作为Kl诱导物,维生素D受体(VDR),Egr1(早期生长反应蛋白1)和过氧化物酶体增殖物激活受体γ(PPARγ)是klotho转录的转录因子,Klotho表达可以由雷帕霉素,25-OH维生素D和他汀类抑制剂HMG-CoA还原酶诱导。

为了寻找KL诱导的分子机制,研究人员研究了结合Kl基因的启动子/增强子序列的小分子和转录因子。发现了用小分子"化合物H"( N-(2-chlorophenyl)-1H-indole-3-caboxamide)诱导Kl表达的新型分子机制。化合物H通过Kl基因的CpG岛中的去甲基化增加了Kl的表达,并且去甲基化是通过激活去甲基化酶而不是抑制甲基化酶来实现的。由于去甲基化,化合物H增强转录因子Pax4和Kid3与Kl基因启动子的结合,Pax4和Kid3分别调节Kl启动子活性的阳性和阴性。

研究结果表明,去甲基化是介导化合物H诱导的Kl表达的重要分子机制,有必要进一步的调查以确定化合物H是否将体内的Kl基因脱甲基化,以及Kl是否可以作为抑制或延缓年龄相关疾病发病的治疗剂。

原始出处:
Jung D, et al. Induction of anti-aging gene klotho with a small chemical compound that demethylates CpG islands. Oncotarget. 2017 Jul 18;8(29):46745-46755. doi: 10.18632/oncotarget.18608.

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    2017-12-19 宋威
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    2017-12-22 仁医06
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    2017-08-24 天涯183

    非常好的文章.学习了

    0

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    2017-08-23 drj2004
  7. [GetPortalCommentsPageByObjectIdResponse(id=1914653, encodeId=6461191465350, content=<a href='/topic/show?id=84d7469559b' target=_blank style='color:#2F92EE;'>#小分子#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=0, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=46955, encryptionId=84d7469559b, topicName=小分子)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=6105386, createdName=宋威, createdTime=Tue Dec 19 22:16:00 CST 2017, time=2017-12-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1906357, encodeId=65e9190635e2e, content=<a href='/topic/show?id=7795334e220' target=_blank style='color:#2F92EE;'>#化合物#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=23, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=33472, encryptionId=7795334e220, topicName=化合物)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=267e204, createdName=wangyang7958, createdTime=Wed Feb 28 13:16:00 CST 2018, time=2018-02-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1975708, encodeId=769119e5708ae, content=<a href='/topic/show?id=1dd655e83d2' target=_blank style='color:#2F92EE;'>#抗衰老基因#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=30, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=55783, encryptionId=1dd655e83d2, topicName=抗衰老基因)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=0b7c20, createdName=wjcjjian, createdTime=Sat Aug 26 19:16:00 CST 2017, time=2017-08-26, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1795447, encodeId=de0e1e95447b4, content=<a href='/topic/show?id=248e1e1345b' target=_blank style='color:#2F92EE;'>#target#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=39, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=17134, encryptionId=248e1e1345b, topicName=target)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=55683, createdName=仁医06, createdTime=Fri Dec 22 06:16:00 CST 2017, time=2017-12-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=236705, encodeId=fb2a236e050a, content=非常好的文章.学习了, beContent=null, objectType=article, channel=null, level=null, likeNumber=53, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/NUyjXTCJjo7LIiaRZTzJ3SEfiauCzTMPW7YvPPYLNJBXG9oh6Al1icq2VQQkIHWxqXehcicTS62YKJVBhxeth3wggw/0, createdBy=7ce01621306, createdName=天涯183, createdTime=Thu Aug 24 15:34:59 CST 2017, time=2017-08-24, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1407820, encodeId=e600140e820a4, content=<a href='/topic/show?id=ab471053548' target=_blank style='color:#2F92EE;'>#Klotho#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=33, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=10535, encryptionId=ab471053548, topicName=Klotho)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=74062724030, createdName=drj2004, createdTime=Wed Aug 23 02:16:00 CST 2017, time=2017-08-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=236079, encodeId=fa222360e9a1, content=非常好的文章.学习了.很受益, beContent=null, objectType=article, channel=null, level=null, likeNumber=58, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/NUyjXTCJjo7LIiaRZTzJ3SEfiauCzTMPW7YvPPYLNJBXG9oh6Al1icq2VQQkIHWxqXehcicTS62YKJVBhxeth3wggw/0, createdBy=7ce01621306, createdName=天涯183, createdTime=Tue Aug 22 17:51:07 CST 2017, time=2017-08-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=235688, encodeId=172c235688c2, content=学习了,谢谢。, beContent=null, objectType=article, channel=null, level=null, likeNumber=57, 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 Aug 21 12:51:41 CST 2017, time=2017-08-21, status=1, ipAttribution=)]
    2017-08-22 天涯183

    非常好的文章.学习了.很受益

    0

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    2017-08-21 惠映实验室

    学习了,谢谢。

    0

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