Nat Commun:揭示HBV慢性感染导致肝癌发生的机制

2019-01-17 佚名 中国科学技术大学

1月15日,《自然-通讯》(Nature Communications)杂志在线发表了中国科学技术大学生命科学与医学部、中国科学院天然免疫与慢性疾病重点实验室、合肥微尺度物质科学国家研究中心田志刚课题组的研究论文“Breakdown of adaptive immunotolerance induces hepatocellular carcinoma in HBsAg-tg mice”。该研究在

1月15日,《自然-通讯》(Nature Communications)杂志在线发表了中国科学技术大学生命科学与医学部、中国科学院天然免疫与慢性疾病重点实验室、合肥微尺度物质科学国家研究中心田志刚课题组的研究论文“Breakdown of adaptive immunotolerance induces hepatocellular carcinoma in HBsAg-tg mice”。该研究在转基因小鼠中发现TIGIT抑制性通路维持了CD8+T细胞对HBV的耐受,而打破这种耐受可以使HBV转基因小鼠(HBV携带模型)肝脏产成慢性炎症,最终发展成肝癌。

慢性乙肝(chronic HBV)感染可以导致慢性肝炎、肝硬化、甚至肝癌。而慢性HBV感染的研究一直缺乏合适的小鼠模型。肝脏是一个特殊的免疫耐受器官,肝脏中的免疫细胞主要呈现出免疫耐受状态。临床上的HBV携带者和HBV转基因小鼠中,肝脏中CD8+T细胞由于高表达抑制性受体而处于免疫抑制状态,并无肝脏损伤产生;而当肝脏免疫耐受环境被打破,免疫细胞被激活,其在清除病毒的过程中引起的免疫应答能导致肝脏炎症的发生。

该研究发现HBV转基因(HBs-tg)小鼠肝脏高表达抑制性受体TIGIT,通过持续性阻断TIGIT抑制性通路,可以使小鼠产生慢性肝炎。对TIGIT阻断后的小鼠进行HBV表面抗原疫苗免疫,小鼠可以产生肝癌。对机制进行探索,研究人员发现TIGIT阻断后HBs-tg小鼠肝脏中CD8+T细胞数目增多,活化增强,并出现抗原特异性CTLs。清除CD8+T细胞的HBs-tg小鼠阻断TIGIT后肝损伤明显减轻;若对TIGIT阻断后的HBs-tg小鼠在疫苗免疫期间清除CD8+T细胞,则不会发展成为肝癌。综上所述,该研究发现TIGIT抑制性通路维持了HBV携带鼠中CD8+ T细胞的耐受,并且成功建立了一个由慢性HBV感染导致的肝癌小鼠模型,为后续深入研究HBV相关肝癌的预防和治疗提供了合适的动物平台。

该研究工作得到国家重点研发计划、国家自然科学基金、中科院先导项目和重大专项的资助。

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    2019-11-22 liye789132251
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    2019-06-02 liuli5079
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    2019-08-04 klivis
  5. [GetPortalCommentsPageByObjectIdResponse(id=1694799, encodeId=12d71694e998a, content=<a href='/topic/show?id=c4df53524f3' target=_blank style='color:#2F92EE;'>#慢性感染#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=38, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=53524, encryptionId=c4df53524f3, topicName=慢性感染)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=a6b229759322, createdName=wjywjy, createdTime=Thu Aug 15 05:57:00 CST 2019, time=2019-08-15, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1883545, encodeId=47d6188354545, content=<a href='/topic/show?id=3b2112532d8' target=_blank style='color:#2F92EE;'>#Nat#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=50, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=12532, encryptionId=3b2112532d8, topicName=Nat)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=2e6f107, createdName=liye789132251, createdTime=Fri Nov 22 11:57:00 CST 2019, time=2019-11-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2087502, encodeId=ba78208e50268, content=<a href='/topic/show?id=490750196b' target=_blank style='color:#2F92EE;'>#COMMUN#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=43, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=5019, encryptionId=490750196b, topicName=COMMUN)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=7931272, createdName=liuli5079, createdTime=Sun Jun 02 07:57:00 CST 2019, time=2019-06-02, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1836676, encodeId=cc6418366e6fe, content=<a href='/topic/show?id=f9d08524be' target=_blank style='color:#2F92EE;'>#HBV#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=39, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=8524, encryptionId=f9d08524be, topicName=HBV)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=e87531, createdName=klivis, createdTime=Sun Aug 04 21:57:00 CST 2019, time=2019-08-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=358829, encodeId=5ca9358829f3, content=学习一下, beContent=null, objectType=article, channel=null, level=null, likeNumber=88, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/NUyjXTCJjo6KcicAVC1MwuOgo3iaicb1Imgk1yIfnvr6oXzibcAFB6puAyNJXbzWhNuLqaFYBVRWjh7rghkvFLPxMAfD5ib3nXwVD/0, createdBy=bed21972958, createdName=wxl882001, createdTime=Mon Jan 21 19:47:50 CST 2019, time=2019-01-21, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=358489, encodeId=345635848921, content=TIGIT的全称是什么,能说明下吗。, beContent=null, objectType=article, channel=null, level=null, likeNumber=0, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://thirdwx.qlogo.cn/mmopen/vi_32/DYAIOgq83eqYPFHuMA3bhYQrHvycmum7IJoCsLK0FP6X56Eoj9PZAECDke8zLCKxZZvk9q7B6rZmPuFgN5YCfw/132, createdBy=f52d2514454, createdName=SCI我的梦, createdTime=Fri Jan 18 07:00:35 CST 2019, time=2019-01-18, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=358487, encodeId=c55d35848ec0, content=学习了,感谢分享, beContent=null, objectType=article, channel=null, level=null, likeNumber=102, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://thirdwx.qlogo.cn/mmopen/vi_32/DYAIOgq83eqYPFHuMA3bhYQrHvycmum7IJoCsLK0FP6X56Eoj9PZAECDke8zLCKxZZvk9q7B6rZmPuFgN5YCfw/132, createdBy=f52d2514454, createdName=SCI我的梦, createdTime=Fri Jan 18 06:36:36 CST 2019, time=2019-01-18, status=1, ipAttribution=)]
    2019-01-21 wxl882001

    学习一下

    0

  6. [GetPortalCommentsPageByObjectIdResponse(id=1694799, encodeId=12d71694e998a, content=<a href='/topic/show?id=c4df53524f3' target=_blank style='color:#2F92EE;'>#慢性感染#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=38, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=53524, encryptionId=c4df53524f3, topicName=慢性感染)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=a6b229759322, createdName=wjywjy, createdTime=Thu Aug 15 05:57:00 CST 2019, time=2019-08-15, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1883545, encodeId=47d6188354545, content=<a href='/topic/show?id=3b2112532d8' target=_blank style='color:#2F92EE;'>#Nat#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=50, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=12532, encryptionId=3b2112532d8, topicName=Nat)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=2e6f107, createdName=liye789132251, createdTime=Fri Nov 22 11:57:00 CST 2019, time=2019-11-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2087502, encodeId=ba78208e50268, content=<a href='/topic/show?id=490750196b' target=_blank style='color:#2F92EE;'>#COMMUN#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=43, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=5019, encryptionId=490750196b, topicName=COMMUN)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=7931272, createdName=liuli5079, createdTime=Sun Jun 02 07:57:00 CST 2019, time=2019-06-02, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1836676, encodeId=cc6418366e6fe, content=<a href='/topic/show?id=f9d08524be' target=_blank style='color:#2F92EE;'>#HBV#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=39, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=8524, encryptionId=f9d08524be, topicName=HBV)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=e87531, createdName=klivis, createdTime=Sun Aug 04 21:57:00 CST 2019, time=2019-08-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=358829, encodeId=5ca9358829f3, content=学习一下, beContent=null, objectType=article, channel=null, level=null, likeNumber=88, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/NUyjXTCJjo6KcicAVC1MwuOgo3iaicb1Imgk1yIfnvr6oXzibcAFB6puAyNJXbzWhNuLqaFYBVRWjh7rghkvFLPxMAfD5ib3nXwVD/0, createdBy=bed21972958, createdName=wxl882001, createdTime=Mon Jan 21 19:47:50 CST 2019, time=2019-01-21, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=358489, encodeId=345635848921, content=TIGIT的全称是什么,能说明下吗。, beContent=null, objectType=article, channel=null, level=null, likeNumber=0, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://thirdwx.qlogo.cn/mmopen/vi_32/DYAIOgq83eqYPFHuMA3bhYQrHvycmum7IJoCsLK0FP6X56Eoj9PZAECDke8zLCKxZZvk9q7B6rZmPuFgN5YCfw/132, createdBy=f52d2514454, createdName=SCI我的梦, createdTime=Fri Jan 18 07:00:35 CST 2019, time=2019-01-18, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=358487, encodeId=c55d35848ec0, content=学习了,感谢分享, beContent=null, objectType=article, channel=null, level=null, likeNumber=102, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://thirdwx.qlogo.cn/mmopen/vi_32/DYAIOgq83eqYPFHuMA3bhYQrHvycmum7IJoCsLK0FP6X56Eoj9PZAECDke8zLCKxZZvk9q7B6rZmPuFgN5YCfw/132, createdBy=f52d2514454, createdName=SCI我的梦, createdTime=Fri Jan 18 06:36:36 CST 2019, time=2019-01-18, status=1, ipAttribution=)]
    2019-01-18 SCI我的梦

    TIGIT的全称是什么,能说明下吗。

    0

  7. [GetPortalCommentsPageByObjectIdResponse(id=1694799, encodeId=12d71694e998a, content=<a href='/topic/show?id=c4df53524f3' target=_blank style='color:#2F92EE;'>#慢性感染#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=38, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=53524, encryptionId=c4df53524f3, topicName=慢性感染)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=a6b229759322, createdName=wjywjy, createdTime=Thu Aug 15 05:57:00 CST 2019, time=2019-08-15, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1883545, encodeId=47d6188354545, content=<a href='/topic/show?id=3b2112532d8' target=_blank style='color:#2F92EE;'>#Nat#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=50, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=12532, encryptionId=3b2112532d8, topicName=Nat)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=2e6f107, createdName=liye789132251, createdTime=Fri Nov 22 11:57:00 CST 2019, time=2019-11-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2087502, encodeId=ba78208e50268, content=<a href='/topic/show?id=490750196b' target=_blank style='color:#2F92EE;'>#COMMUN#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=43, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=5019, encryptionId=490750196b, topicName=COMMUN)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=7931272, createdName=liuli5079, createdTime=Sun Jun 02 07:57:00 CST 2019, time=2019-06-02, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1836676, encodeId=cc6418366e6fe, content=<a href='/topic/show?id=f9d08524be' target=_blank style='color:#2F92EE;'>#HBV#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=39, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=8524, encryptionId=f9d08524be, topicName=HBV)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=e87531, createdName=klivis, createdTime=Sun Aug 04 21:57:00 CST 2019, time=2019-08-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=358829, encodeId=5ca9358829f3, content=学习一下, beContent=null, objectType=article, channel=null, level=null, likeNumber=88, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/NUyjXTCJjo6KcicAVC1MwuOgo3iaicb1Imgk1yIfnvr6oXzibcAFB6puAyNJXbzWhNuLqaFYBVRWjh7rghkvFLPxMAfD5ib3nXwVD/0, createdBy=bed21972958, createdName=wxl882001, createdTime=Mon Jan 21 19:47:50 CST 2019, time=2019-01-21, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=358489, encodeId=345635848921, content=TIGIT的全称是什么,能说明下吗。, beContent=null, objectType=article, channel=null, level=null, likeNumber=0, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://thirdwx.qlogo.cn/mmopen/vi_32/DYAIOgq83eqYPFHuMA3bhYQrHvycmum7IJoCsLK0FP6X56Eoj9PZAECDke8zLCKxZZvk9q7B6rZmPuFgN5YCfw/132, createdBy=f52d2514454, createdName=SCI我的梦, createdTime=Fri Jan 18 07:00:35 CST 2019, time=2019-01-18, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=358487, encodeId=c55d35848ec0, content=学习了,感谢分享, beContent=null, objectType=article, channel=null, level=null, likeNumber=102, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://thirdwx.qlogo.cn/mmopen/vi_32/DYAIOgq83eqYPFHuMA3bhYQrHvycmum7IJoCsLK0FP6X56Eoj9PZAECDke8zLCKxZZvk9q7B6rZmPuFgN5YCfw/132, createdBy=f52d2514454, createdName=SCI我的梦, createdTime=Fri Jan 18 06:36:36 CST 2019, time=2019-01-18, status=1, ipAttribution=)]
    2019-01-18 SCI我的梦

    学习了,感谢分享

    0

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