Mol Cell:MK2介导的IPK1磷酸化可预防TNF诱导的细胞死亡

2017-10-11 MedSci MedSci原创

TNF是一种炎性细胞因子,当与其受体TNFR1结合时可以驱动细胞因子产生、细胞存活或细胞死亡。TNFR1刺激引起NF-κB、p38α及其下游效应激酶MK2的激活,从而促进靶基因的转录、mRNA稳定和翻译。本研究中,研究人员发现,TNF诱导的MK2的激活导致全部RIPK1磷酸化。MK2在残基S321处直接磷酸化RIPK1,抑制其与FADD/caspase-8的结合能力,并诱导RIPK1激酶依赖性细胞

TNF是一种炎性细胞因子,当与其受体TNFR1结合时可以驱动细胞因子产生、细胞存活或细胞死亡。TNFR1刺激引起NF-κB、p38α及其下游效应激酶MK2的激活,从而促进靶基因的转录、mRNA稳定和翻译。

本研究中,研究人员发现,TNF诱导的MK2的激活导致全部RIPK1磷酸化。MK2在残基S321处直接磷酸化RIPK1,抑制其与FADD/caspase-8的结合能力,并诱导RIPK1激酶依赖性细胞凋亡和程序性死亡。与此一致地是,磷酸化模拟物S321D RIPK1突变限制了TNF诱导的死亡。在机理上,研究人员发现S321的磷酸化抑制RIPK1激酶的激活。进一步研究表明,细胞质RIPK1有助于复合物II介导的细胞死亡,与复合物I的募集无关,表明复合物II起源于复合物I和胞质中的RIPK1。

因此,MK2介导的RIPK1的磷酸化作为整合细胞存活和细胞因子产生的TNF信号通路内的检测点。

原始出处:


Isabel Jaco, Alessandro Annibaldi, Najoua Lalaoui, et al., MK2 Phosphorylates RIPK1 to Prevent TNF-Induced Cell Death. Mol Cell. 2017 Jun 1; 66(5): 698–710.e5. doi: 10.1016/j.molcel.2017.05.003

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  2. [GetPortalCommentsPageByObjectIdResponse(id=1870209, encodeId=bf2918e020935, content=<a href='/topic/show?id=fd764459a8' target=_blank style='color:#2F92EE;'>#Cell#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=36, 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 Jan 24 05:41:00 CST 2018, time=2018-01-24, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1960470, encodeId=bf1219604e0f9, content=<a href='/topic/show?id=dbe6445416' target=_blank style='color:#2F92EE;'>#CEL#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=24, 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=Wed Oct 25 04:41:00 CST 2017, time=2017-10-25, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1401651, encodeId=41cd14016517c, content=<a href='/topic/show?id=17e21e57943' target=_blank style='color:#2F92EE;'>#TNF#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=21, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=17579, encryptionId=17e21e57943, topicName=TNF)], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/DYAIOgq83eqjVbfRD4f4vibEcZVcvato8Qib1gGtZJiayXCMFgHrkeErSiaxdYMiabKGxY2an9muxWCkUJbjFPViaC6A/132, createdBy=e4fb2361580, createdName=snowpeakxu, createdTime=Fri Oct 13 10:41:00 CST 2017, time=2017-10-13, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=252021, encodeId=88a225202166, content=谢谢分享.有点意思, beContent=null, objectType=article, channel=null, level=null, likeNumber=66, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/Q3auHgzwzM7GibvIBibibnnnvpajk2stlDF5oichYahI6Bia8uxeTBFoPbdoHWebyXf9eal9FNgUF2lNcrwoZicM3BvQ/0, createdBy=a3742066385, createdName=戒馋,懒,贪, createdTime=Wed Oct 11 19:56:33 CST 2017, time=2017-10-11, status=1, ipAttribution=)]
    2017-10-25 维他命
  3. [GetPortalCommentsPageByObjectIdResponse(id=1870209, encodeId=bf2918e020935, content=<a href='/topic/show?id=fd764459a8' target=_blank style='color:#2F92EE;'>#Cell#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=36, 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 Jan 24 05:41:00 CST 2018, time=2018-01-24, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1960470, encodeId=bf1219604e0f9, content=<a href='/topic/show?id=dbe6445416' target=_blank style='color:#2F92EE;'>#CEL#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=24, 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=Wed Oct 25 04:41:00 CST 2017, time=2017-10-25, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1401651, encodeId=41cd14016517c, content=<a href='/topic/show?id=17e21e57943' target=_blank style='color:#2F92EE;'>#TNF#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=21, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=17579, encryptionId=17e21e57943, topicName=TNF)], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/DYAIOgq83eqjVbfRD4f4vibEcZVcvato8Qib1gGtZJiayXCMFgHrkeErSiaxdYMiabKGxY2an9muxWCkUJbjFPViaC6A/132, createdBy=e4fb2361580, createdName=snowpeakxu, createdTime=Fri Oct 13 10:41:00 CST 2017, time=2017-10-13, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=252021, encodeId=88a225202166, content=谢谢分享.有点意思, beContent=null, objectType=article, channel=null, level=null, likeNumber=66, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/Q3auHgzwzM7GibvIBibibnnnvpajk2stlDF5oichYahI6Bia8uxeTBFoPbdoHWebyXf9eal9FNgUF2lNcrwoZicM3BvQ/0, createdBy=a3742066385, createdName=戒馋,懒,贪, createdTime=Wed Oct 11 19:56:33 CST 2017, time=2017-10-11, status=1, ipAttribution=)]
    2017-10-13 snowpeakxu
  4. [GetPortalCommentsPageByObjectIdResponse(id=1870209, encodeId=bf2918e020935, content=<a href='/topic/show?id=fd764459a8' target=_blank style='color:#2F92EE;'>#Cell#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=36, 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 Jan 24 05:41:00 CST 2018, time=2018-01-24, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1960470, encodeId=bf1219604e0f9, content=<a href='/topic/show?id=dbe6445416' target=_blank style='color:#2F92EE;'>#CEL#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=24, 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=Wed Oct 25 04:41:00 CST 2017, time=2017-10-25, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1401651, encodeId=41cd14016517c, content=<a href='/topic/show?id=17e21e57943' target=_blank style='color:#2F92EE;'>#TNF#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=21, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=17579, encryptionId=17e21e57943, topicName=TNF)], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/DYAIOgq83eqjVbfRD4f4vibEcZVcvato8Qib1gGtZJiayXCMFgHrkeErSiaxdYMiabKGxY2an9muxWCkUJbjFPViaC6A/132, createdBy=e4fb2361580, createdName=snowpeakxu, createdTime=Fri Oct 13 10:41:00 CST 2017, time=2017-10-13, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=252021, encodeId=88a225202166, content=谢谢分享.有点意思, beContent=null, objectType=article, channel=null, level=null, likeNumber=66, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/Q3auHgzwzM7GibvIBibibnnnvpajk2stlDF5oichYahI6Bia8uxeTBFoPbdoHWebyXf9eal9FNgUF2lNcrwoZicM3BvQ/0, createdBy=a3742066385, createdName=戒馋,懒,贪, createdTime=Wed Oct 11 19:56:33 CST 2017, time=2017-10-11, status=1, ipAttribution=)]
    2017-10-11 戒馋,懒,贪

    谢谢分享.有点意思

    0