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J immunol:NF-KB参与抗HBV感染天然免疫反应

2016-06-16 佚名 生物谷

 细胞内的天然免疫反应是抵抗外源病毒感染的第一道防线,其中I型与III型干扰素起着关键的作用。目前对于抗RNA病毒的免疫反应机制了解的比较深入,但对于肝脏抵抗DNA病毒感染的机制仍不清楚。此前研究发现,DNA病毒能够直接通过DNA或RNA中间物引起NF-KB的激活,但这一信号对于抗HBV免疫反应以及干扰素的产生是否具有联系仍不清楚。为了研究清楚上述问题,来自迈阿密大学医学院的Emman

 细胞内的天然免疫反应是抵抗外源病毒感染的第一道防线,其中I型与III型干扰素起着关键的作用。目前对于抗RNA病毒的免疫反应机制了解的比较深入,但对于肝脏抵抗DNA病毒感染的机制仍不清楚。此前研究发现,DNA病毒能够直接通过DNA或RNA中间物引起NF-KB的激活,但这一信号对于抗HBV免疫反应以及干扰素的产生是否具有联系仍不清楚。为了研究清楚上述问题,来自迈阿密大学医学院的Emmanuel Thomas课题组进行了深入的研究,相关结果发表在最近一期的《Journal of Immunology》杂志上。

HBV是一类DNA病毒,在感染过程中能够通过宿主细胞中的RNA聚合酶活性产生RNA中间产物。一些研究认为HBV在感染肝脏细胞的过程中并不会引发明显的天然免疫基因表达,而且肝脏损伤似乎是由长期的抗感染免疫反应所导致的。然而,另外一些研究发现HBV在后天免疫反应开始之前就可以被清除掉,这表明抗病毒天然免疫反应对于HBV的清除具有重要的作用。

在这项研究中,首先,作者通过体外HBV感染试验证明肝脏细胞在受到HBV感染之后能够快速地产生CXCL10以及CCL5等基因的表达。进一步,作者通过一种叫做entecavir的小分子药物抑制HBV的复制,然而这一处理没有影响HBV感染引发的上述因子的表达。作者通过芯片技术分析了HBV感染后肝脏细胞基因的表达谱变化,结果显示,包括CCL5以及CXCL10在内的多个基因表达都发生了变化。

之后,作者发现病毒的DNA以及 poly(dA:dT) 、poly(dG:dC)等均能够引起肝脏细胞表达趋化因子以及干扰素,而通过将TBK或者IRF3的活性抑制,则能够有效抑制上述基因的表达。

进一步,作者发现DNA以及其它类似物(ISD、2-3 cGAMP)均能够引起IRF的快速活化,表明DNA确实能够引发抗病毒免疫反应。

接下来,作者检测了已知的DNA信号通路是否参与了肝脏细胞抗病毒感染的免疫激活,结果显示,IFI16以及AMI2等均参与了肝脏细胞抗HBV感染的免疫反应。通过RNA干扰试验,作者发现IKKgamma的活性抑制能够有效降低抗HBV感染的免疫反应效应。这说明NF-KB参与了抗HBV天然免疫过程。

原始出处

Masato Yoneda, Jinhee Hyun, Silvia Jakubski, Satoru Saito, Atsushi Nakajima, Eugene R. Schiff, and Emmanuel Thomas.Hepatitis B Virus and DNA Stimulation Trigger a Rapid Innate Immune Response through NF-κB.J immunol.2016

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  1. [GetPortalCommentsPageByObjectIdResponse(id=1836611, encodeId=a311183661110, content=<a href='/topic/show?id=f9d08524be' target=_blank style='color:#2F92EE;'>#HBV#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=83, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=8524, encryptionId=f9d08524be, topicName=HBV)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=e87531, createdName=klivis, createdTime=Sat Nov 05 09:40:00 CST 2016, time=2016-11-05, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=90464, encodeId=5c59904647f, content=好文章,值得学习, beContent=null, objectType=article, channel=null, level=null, likeNumber=162, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=53751677671, createdName=沉心多思, createdTime=Sat Jun 18 18:25:00 CST 2016, time=2016-06-18, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1280140, encodeId=3625128014074, content=<a href='/topic/show?id=2bbe289846f' target=_blank style='color:#2F92EE;'>#免疫反应#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=0, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=28984, encryptionId=2bbe289846f, topicName=免疫反应)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=827b160, createdName=cnxcy, createdTime=Sat Jun 18 08:40:00 CST 2016, time=2016-06-18, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1462184, encodeId=6f0b1462184df, content=<a href='/topic/show?id=b97885350d' target=_blank style='color:#2F92EE;'>#HBV感染#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=62, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=8535, encryptionId=b97885350d, topicName=HBV感染)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=33ed6479538, createdName=Tommy1951, createdTime=Sat Jun 18 08:40:00 CST 2016, time=2016-06-18, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1481272, encodeId=b08714812e2e1, content=<a href='/topic/show?id=c5534414ee6' target=_blank style='color:#2F92EE;'>#天然免疫#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=74, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=44147, encryptionId=c5534414ee6, topicName=天然免疫)], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/aLGWoFXAyMbIu3qymFOyheQLjPSX3OUs5GmkyBlcCOwTPIeq3why9NGibxxUqYo6hcx8qZLHZFgNPnBK1yzWeOFpyg2OnWOt0/0, createdBy=fa4716, createdName=仁心济世, createdTime=Sat Jun 18 08:40:00 CST 2016, time=2016-06-18, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1536957, encodeId=e5de153695e96, content=<a href='/topic/show?id=f1c512e304f' target=_blank style='color:#2F92EE;'>#NF-kB#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=140, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=12730, encryptionId=f1c512e304f, topicName=NF-kB)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=e2ca12754731, createdName=jichang, createdTime=Sat Jun 18 08:40:00 CST 2016, time=2016-06-18, status=1, ipAttribution=)]
    2016-11-05 klivis
  2. [GetPortalCommentsPageByObjectIdResponse(id=1836611, encodeId=a311183661110, content=<a href='/topic/show?id=f9d08524be' target=_blank style='color:#2F92EE;'>#HBV#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=83, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=8524, encryptionId=f9d08524be, topicName=HBV)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=e87531, createdName=klivis, createdTime=Sat Nov 05 09:40:00 CST 2016, time=2016-11-05, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=90464, encodeId=5c59904647f, content=好文章,值得学习, beContent=null, objectType=article, channel=null, level=null, likeNumber=162, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=53751677671, createdName=沉心多思, createdTime=Sat Jun 18 18:25:00 CST 2016, time=2016-06-18, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1280140, encodeId=3625128014074, content=<a href='/topic/show?id=2bbe289846f' target=_blank style='color:#2F92EE;'>#免疫反应#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=0, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=28984, encryptionId=2bbe289846f, topicName=免疫反应)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=827b160, createdName=cnxcy, createdTime=Sat Jun 18 08:40:00 CST 2016, time=2016-06-18, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1462184, encodeId=6f0b1462184df, content=<a href='/topic/show?id=b97885350d' target=_blank style='color:#2F92EE;'>#HBV感染#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=62, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=8535, encryptionId=b97885350d, topicName=HBV感染)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=33ed6479538, createdName=Tommy1951, createdTime=Sat Jun 18 08:40:00 CST 2016, time=2016-06-18, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1481272, encodeId=b08714812e2e1, content=<a href='/topic/show?id=c5534414ee6' target=_blank style='color:#2F92EE;'>#天然免疫#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=74, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=44147, encryptionId=c5534414ee6, topicName=天然免疫)], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/aLGWoFXAyMbIu3qymFOyheQLjPSX3OUs5GmkyBlcCOwTPIeq3why9NGibxxUqYo6hcx8qZLHZFgNPnBK1yzWeOFpyg2OnWOt0/0, createdBy=fa4716, createdName=仁心济世, createdTime=Sat Jun 18 08:40:00 CST 2016, time=2016-06-18, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1536957, encodeId=e5de153695e96, content=<a href='/topic/show?id=f1c512e304f' target=_blank style='color:#2F92EE;'>#NF-kB#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=140, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=12730, encryptionId=f1c512e304f, topicName=NF-kB)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=e2ca12754731, createdName=jichang, createdTime=Sat Jun 18 08:40:00 CST 2016, time=2016-06-18, status=1, ipAttribution=)]
    2016-06-18 沉心多思

    好文章,值得学习

    0

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    2016-06-18 cnxcy
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    2016-06-18 jichang

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