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Leukemia:维生素C能诱导IDH1突变的急性髓系白血病的表观遗传修饰

2018-01-24 MedSci MedSci原创

科学家在白血病模型中设计了一个研究vitamin C在驱动分化的转录因子结合位点诱导表观遗传修饰的研究模型,从而揭示了vitamin C 的表观修饰作用。

急性髓系白血病患者基因组ten-eleven translocation 2(TET2)和isocitrate dehydrogenase1 and 2(IDH1/2)编码序列中存在的经常性突变,而最近的研究表明这些突变有可能是"开拓者"突变并且存在于前白血病细胞中。抗坏血酸(vitamin C)是水溶性的人体必需的营养物质,并且作为普通的培养基添加剂能够提高细胞增殖能力。免疫细胞和脑细胞中有高水平的vitamin C,在这些细胞中vitamin C能够维持铁处于二价状态。另外在体外研究中,vitamin C和TET2的催化结构域相接触。而之前的研究也发现Vitamin C对H3K9和5mC去甲基化,从而提高诱导性多能干细胞的产生效率,以及诱导小鼠胚胎干细胞的为胚胎样状态。这些表明vitamin C参与表观遗传修饰。

髓系恶性血液疾病的基因组的特征是表观遗传异常。急性髓系白血病基因组中异质性,失活TET2突变以及IDH1突变是经常性和互相排斥的事件。抗坏血酸(vitamin C)在体外具有刺激TET2催化活性,并且因此科学家研究它在表达IDH1 R132H突变的白血病模型中的作用。Vitamin C处理能诱导IDH1 R132H依赖的细胞增殖降低,并且会导致白细胞分化基因的表达上升。Vitamin C诱导不同甲基化区域,而这些区域于髓系分化相关的增强子区域有明显的重叠,并且在造血转录因子CEBPβ,HIF1α,RUNX1和PU.1的序列原件中富集。另外,vitamin C诱导RUNX1结合的H2K27ac侧链增加。科学家在白血病模型中设计了一个研究vitamin C在驱动分化的转录因子结合位点诱导表观遗传修饰的研究模型,从而揭示了vitamin C 的表观修饰作用。

原文出处:Mingay M, Chaturvedi A, Bilenky M, et al. Vitamin C-induced epigenomic remodelling in IDH1 mutant acute myeloid leukaemia[J]. Leukemia, 2017.doi:10.1038/leu.2017.171

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    2018-01-29 jyzxjiangqin

    急性髓系白血病的治疗.

    0

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  6. [GetPortalCommentsPageByObjectIdResponse(id=1822054, encodeId=998d182205454, content=<a href='/topic/show?id=ee4b1021266e' target=_blank style='color:#2F92EE;'>#髓系白血病#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=69, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=102126, encryptionId=ee4b1021266e, topicName=髓系白血病)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=b79433, createdName=fangcong, createdTime=Sat Mar 24 01:46:00 CST 2018, time=2018-03-24, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1715482, encodeId=ba951e1548295, content=<a href='/topic/show?id=4942941e83' target=_blank style='color:#2F92EE;'>#IDH1#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=123, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=9417, encryptionId=4942941e83, topicName=IDH1)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=be6531934024, createdName=ms6127405442416114, createdTime=Sun Jul 29 19:46:00 CST 2018, time=2018-07-29, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2075642, encodeId=d0f920e5642c1, content=<a href='/topic/show?id=afce902528d' target=_blank style='color:#2F92EE;'>#表观遗传修饰#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=85, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=90252, encryptionId=afce902528d, topicName=表观遗传修饰)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=a5d7367, createdName=zhwj, createdTime=Wed Mar 21 12:46:00 CST 2018, time=2018-03-21, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=283093, encodeId=6d0f283093d5, content=急性髓系白血病的治疗., beContent=null, objectType=article, channel=null, level=null, likeNumber=125, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20160806/IMG57A5698BDB0244113.jpg, createdBy=32a91358059, createdName=jyzxjiangqin, createdTime=Mon Jan 29 07:15:44 CST 2018, time=2018-01-29, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1379404, encodeId=863c13e940414, content=<a href='/topic/show?id=86379420cd' target=_blank style='color:#2F92EE;'>#IDH1突变#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=78, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=9420, encryptionId=86379420cd, topicName=IDH1突变)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c192448, createdName=diushouji, createdTime=Fri Jan 26 07:46:00 CST 2018, time=2018-01-26, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1569304, encodeId=8d6c1569304bb, content=<a href='/topic/show?id=1c562e42646' target=_blank style='color:#2F92EE;'>#修饰#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=77, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=27426, encryptionId=1c562e42646, topicName=修饰)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=29c615505859, createdName=zhangyxzsh, createdTime=Fri Jan 26 07:46:00 CST 2018, time=2018-01-26, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=281660, encodeId=fd502816603f, content=henhao, beContent=null, objectType=article, channel=null, level=null, likeNumber=128, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/mStl88fu4NcXNhUvfhzd2VdicMnaLeK2Im5gKx4Ucxd8Bwu6S7RG0uILBFQx5HTW2bU4VricDYlQqN20ibASSMYAeGrZrrTpy2Q/0, createdBy=7dcf1938111, createdName=1e0e5a1fm42(暂无匿称), createdTime=Wed Jan 24 19:52:44 CST 2018, time=2018-01-24, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=281639, encodeId=e6a22816395b, content=学习, beContent=null, objectType=article, channel=null, level=null, likeNumber=92, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/mStl88fu4NfBfgWn9nXBgH1sNSiaOAKhsKpN40jDHQKqcRzovau5VibLvREN8uxnu9sKoScBicHSiaDMmbveibFdrBiaD4k4IOPwlG/0, createdBy=b5d11730951, createdName=Jackie Li, createdTime=Wed Jan 24 18:55:20 CST 2018, time=2018-01-24, status=1, ipAttribution=)]
    2018-01-26 zhangyxzsh
  7. [GetPortalCommentsPageByObjectIdResponse(id=1822054, encodeId=998d182205454, content=<a href='/topic/show?id=ee4b1021266e' target=_blank style='color:#2F92EE;'>#髓系白血病#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=69, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=102126, encryptionId=ee4b1021266e, topicName=髓系白血病)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=b79433, createdName=fangcong, createdTime=Sat Mar 24 01:46:00 CST 2018, time=2018-03-24, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1715482, encodeId=ba951e1548295, content=<a href='/topic/show?id=4942941e83' target=_blank style='color:#2F92EE;'>#IDH1#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=123, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=9417, encryptionId=4942941e83, topicName=IDH1)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=be6531934024, createdName=ms6127405442416114, createdTime=Sun Jul 29 19:46:00 CST 2018, time=2018-07-29, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2075642, encodeId=d0f920e5642c1, content=<a href='/topic/show?id=afce902528d' target=_blank style='color:#2F92EE;'>#表观遗传修饰#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=85, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=90252, encryptionId=afce902528d, topicName=表观遗传修饰)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=a5d7367, createdName=zhwj, createdTime=Wed Mar 21 12:46:00 CST 2018, time=2018-03-21, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=283093, encodeId=6d0f283093d5, content=急性髓系白血病的治疗., beContent=null, objectType=article, channel=null, level=null, likeNumber=125, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20160806/IMG57A5698BDB0244113.jpg, createdBy=32a91358059, createdName=jyzxjiangqin, createdTime=Mon Jan 29 07:15:44 CST 2018, time=2018-01-29, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1379404, encodeId=863c13e940414, content=<a href='/topic/show?id=86379420cd' target=_blank style='color:#2F92EE;'>#IDH1突变#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=78, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=9420, encryptionId=86379420cd, topicName=IDH1突变)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=c192448, createdName=diushouji, createdTime=Fri Jan 26 07:46:00 CST 2018, time=2018-01-26, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1569304, encodeId=8d6c1569304bb, content=<a href='/topic/show?id=1c562e42646' target=_blank style='color:#2F92EE;'>#修饰#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=77, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=27426, encryptionId=1c562e42646, topicName=修饰)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=29c615505859, createdName=zhangyxzsh, createdTime=Fri Jan 26 07:46:00 CST 2018, time=2018-01-26, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=281660, encodeId=fd502816603f, content=henhao, beContent=null, objectType=article, channel=null, level=null, likeNumber=128, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/mStl88fu4NcXNhUvfhzd2VdicMnaLeK2Im5gKx4Ucxd8Bwu6S7RG0uILBFQx5HTW2bU4VricDYlQqN20ibASSMYAeGrZrrTpy2Q/0, createdBy=7dcf1938111, createdName=1e0e5a1fm42(暂无匿称), createdTime=Wed Jan 24 19:52:44 CST 2018, time=2018-01-24, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=281639, encodeId=e6a22816395b, content=学习, beContent=null, objectType=article, channel=null, level=null, likeNumber=92, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/mStl88fu4NfBfgWn9nXBgH1sNSiaOAKhsKpN40jDHQKqcRzovau5VibLvREN8uxnu9sKoScBicHSiaDMmbveibFdrBiaD4k4IOPwlG/0, createdBy=b5d11730951, createdName=Jackie Li, createdTime=Wed Jan 24 18:55:20 CST 2018, time=2018-01-24, status=1, ipAttribution=)]
    2018-01-24 1e0e5a1fm42(暂无匿称)

    henhao

    0

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    2018-01-24 Jackie Li

    学习

    0

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