Nature neuroscience:阻断PD-1的免疫疗法可能带来异常的疼痛感

2017-06-28 MedSci MedSci原创

这一研究结果确定了以前未被认识到的PD-L1作为内源性疼痛感抑制剂和神经调节剂的作用。并且表明未来在使用PD-L1中和抗体阻断PD-1信号通路的免疫疗法中,需要考虑到病人可能出现的疼痛感受。

程序性细胞死亡配体-1(PD-L1)通常由癌细胞分泌产生,结合并通过在T细胞上表达的PD-1受体从而导致T细胞功能弱化,抑制免疫。利用靶向抗体组织这一信号通路的激活,已经获得美国FDA允许治疗黑色素瘤。然而,出人意料的是PD-L1和PD-1居然在调节疼痛和神经元功能中也有作用。

在最新一期的Nature Neuroscience杂志中,来自杜克大学的Gang Chen及其同事报导了他们的发现:PD-L1能够抑制神经损伤所带来的慢性和急性疼痛。

研究人员发现,在黑色素瘤,和包括背根神经节(Dorsal root ganglion)在内的正常神经组织都会产生PD-L1。并且通过在裸鼠中足底注射PD-L1能够减轻由福尔马林所诱发的疼痛,而注射PD-L1中和抗体或阻断PD-1受体则会引起异常性的剧烈疼痛。

通过小鼠模型,研究人员发现在缺乏Pd1(Pdcd1)基因的小鼠,表现出对于热损伤和机械损伤的超敏感反应。受到损伤后,背根神经节中的神经元所分泌的PD-L1能够通过结合PD-1受体激活诱导酪氨酸磷酸酶SHP-1的磷酸化,抑制钠通道并通过激活TREK2 K+钾离子通道引起超极化(hyperpolarization),从而有效地抑制伤害感受神经元的兴奋性。值得注意的是,阻断PD-L1或PD-1引起黑色素瘤携带小鼠的自发性疼痛和异常性疼痛。

这一研究结果确定了以前未被认识到的PD-L1作为内源性疼痛感抑制剂和神经调节剂的作用。并且表明未来在使用PD-L1中和抗体阻断PD-1信号通路的免疫疗法中,需要考虑到病人可能出现的疼痛感受。

原始出处:
Gang Chen et al. PD-L1 inhibits acute and chronic pain by suppressing nociceptive neuron activity via PD-1. Nature Neuroscience 20, 917–926 (2017) doi:10.1038/nn.4571

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    2017-08-04 liye789132251
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    2017-07-03 日月生辉

    人体内环境很复杂,不同组织间的的分子水平的相同物质,发挥着不同作用,相外源性物质导入,必然会导致多种生物效应!

    0

  4. 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attachment=null, authenticateStatus=null, createdAvatar=, createdBy=445f1740270, createdName=meiliwuxian, createdTime=Thu Jun 29 08:16:59 CST 2017, time=2017-06-29, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=216576, encodeId=7b9a2165e622, content=药物的副作用可能在使用过程中才能逐渐被认知, 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/mStl88fu4NebL6HUuazlWRDicKU30ib7MWct2QQNWiao1ntOx2x5WUHGVw7R8NBdVuXbznuDsHKg3ImrnRyHGr8WSmKTnycicXEf/0, createdBy=bcd81373695, createdName=dpbl_zlh, createdTime=Thu Jun 29 07:44:56 CST 2017, time=2017-06-29, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=216525, encodeId=6ea72165257a, content=学习了谢谢分享。, beContent=null, objectType=article, channel=null, level=null, likeNumber=25, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cdnapi.center.medsci.cn/medsci/head/2017/04/21/72142930668371951a41ef4ea4b233e6.jpg, createdBy=dcbc1715228, createdName=刘煜, createdTime=Thu Jun 29 06:21:06 CST 2017, time=2017-06-29, status=1, ipAttribution=)]
    2017-06-30 lsndxfj
  5. 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attachment=null, authenticateStatus=null, createdAvatar=, createdBy=445f1740270, createdName=meiliwuxian, createdTime=Thu Jun 29 08:16:59 CST 2017, time=2017-06-29, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=216576, encodeId=7b9a2165e622, content=药物的副作用可能在使用过程中才能逐渐被认知, 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/mStl88fu4NebL6HUuazlWRDicKU30ib7MWct2QQNWiao1ntOx2x5WUHGVw7R8NBdVuXbznuDsHKg3ImrnRyHGr8WSmKTnycicXEf/0, createdBy=bcd81373695, createdName=dpbl_zlh, createdTime=Thu Jun 29 07:44:56 CST 2017, time=2017-06-29, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=216525, encodeId=6ea72165257a, content=学习了谢谢分享。, beContent=null, objectType=article, channel=null, level=null, likeNumber=25, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cdnapi.center.medsci.cn/medsci/head/2017/04/21/72142930668371951a41ef4ea4b233e6.jpg, createdBy=dcbc1715228, createdName=刘煜, createdTime=Thu Jun 29 06:21:06 CST 2017, time=2017-06-29, status=1, ipAttribution=)]
    2017-06-30 jichang
  6. 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authenticateStatus=null, createdAvatar=http://cdnapi.center.medsci.cn/medsci/head/2017/04/21/72142930668371951a41ef4ea4b233e6.jpg, createdBy=dcbc1715228, createdName=刘煜, createdTime=Thu Jun 29 06:21:06 CST 2017, time=2017-06-29, status=1, ipAttribution=)]
    2017-06-29 luominglian113

    学习了,谢谢分享

    0

  7. 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authenticateStatus=null, createdAvatar=http://cdnapi.center.medsci.cn/medsci/head/2017/04/21/72142930668371951a41ef4ea4b233e6.jpg, createdBy=dcbc1715228, createdName=刘煜, createdTime=Thu Jun 29 06:21:06 CST 2017, time=2017-06-29, status=1, ipAttribution=)]
    2017-06-29 flysky120

    学习一下知识了

    0

  8. 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attachment=null, authenticateStatus=null, createdAvatar=, createdBy=445f1740270, createdName=meiliwuxian, createdTime=Thu Jun 29 08:16:59 CST 2017, time=2017-06-29, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=216576, encodeId=7b9a2165e622, content=药物的副作用可能在使用过程中才能逐渐被认知, 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/mStl88fu4NebL6HUuazlWRDicKU30ib7MWct2QQNWiao1ntOx2x5WUHGVw7R8NBdVuXbznuDsHKg3ImrnRyHGr8WSmKTnycicXEf/0, createdBy=bcd81373695, createdName=dpbl_zlh, createdTime=Thu Jun 29 07:44:56 CST 2017, time=2017-06-29, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=216525, encodeId=6ea72165257a, content=学习了谢谢分享。, beContent=null, objectType=article, channel=null, level=null, likeNumber=25, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cdnapi.center.medsci.cn/medsci/head/2017/04/21/72142930668371951a41ef4ea4b233e6.jpg, createdBy=dcbc1715228, createdName=刘煜, createdTime=Thu Jun 29 06:21:06 CST 2017, time=2017-06-29, status=1, ipAttribution=)]
    2017-06-29 meiliwuxian

    身体真是个强大的反应器

    0

  9. 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    2017-06-29 dpbl_zlh

    药物的副作用可能在使用过程中才能逐渐被认知

    0

  10. 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    2017-06-29 刘煜

    学习了谢谢分享。

    0

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