Blood:巨噬细胞低吞噬作用介导mAb诱导性细胞清除的免疫耐受

2020-06-20 QQY MedSci原创

由于表面的FcRs减少,巨噬细胞的吞噬作用持续减弱(hypopophagia[即巨噬细胞的吞噬作用低]);巨噬细胞是多种治疗性mAb的关键效应细胞,hypophagia可能会导致患者对mAb耐药。

巨噬细胞抗体依赖性的细胞吞噬作用(ADCP)是治疗性单克隆抗体(mAb,如利妥昔单抗)和抗体诱导的溶血性贫血和免疫血小板减少的主要细胞毒性机制。

近期,《Blood》上发表了一篇文章,Pinney等人研究了对调控巨噬细胞在高靶效应细胞比率(如白血病患者的循环肿瘤负荷)情况下进行ADCP的速率和能力的机制。

通过对原发人类患者和小鼠的巨噬细胞进行定量活细胞成像,研究人员发现在最初受到mAb-调理淋巴细胞的刺激后,巨噬细胞会经历短暂的快速吞噬爆发(<1小时),随后吞噬活性急剧下降,可持续数天。ADCP的这个既往不明确的不应期,或“hypophagia”,在所有的巨噬细胞/mAb/靶细胞体外测试条件下均有出现,并在接受连续的αCD20 mAb依赖性的循环B细胞清除的小鼠的体内Kupffer细胞中也有观察到。

重要的是,hypophagia对抗体依赖性的吞噬没有影响,也不改变巨噬细胞的存活能力。在机制研究中,研究发现,巨噬细胞表面激活的Fc受体快速丢失以及随后发生了蛋白降解是hypophagia中ADCP活性丧失的主要机制。

这些研究结果表明hypophagia是通过ADCP进行的巨噬细胞依赖性的细胞清除的关键的限制步骤,了解这类对固有免疫细胞的细胞毒性能力的限制有助于开发mAb疗法,或可进一步优化ADCP,并改善患者预后。

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    2021-05-28 snf701207
  2. [GetPortalCommentsPageByObjectIdResponse(id=1912393, encodeId=53611912393d4, content=<a href='/topic/show?id=4de7112046c' target=_blank style='color:#2F92EE;'>#mAb#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=29, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=11204, encryptionId=4de7112046c, topicName=mAb)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=25e7304, createdName=snf701207, createdTime=Fri May 28 14:28:20 CST 2021, time=2021-05-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1813278, encodeId=f91b18132e801, content=<a href='/topic/show?id=92b5918e845' target=_blank style='color:#2F92EE;'>#诱导性#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=45, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=91878, encryptionId=92b5918e845, topicName=诱导性)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=4193478, createdName=wgx306, createdTime=Tue Sep 01 20:28:20 CST 2020, time=2020-09-01, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1942896, encodeId=d421194289666, content=<a href='/topic/show?id=c05c391e55f' target=_blank style='color:#2F92EE;'>#吞噬作用#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=40, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=39175, encryptionId=c05c391e55f, topicName=吞噬作用)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=1ce4238, createdName=dangious, createdTime=Thu Nov 26 08:28:20 CST 2020, time=2020-11-26, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=799292, encodeId=387ee99292d9, content=hypophagia是通过ADCP进行的巨噬细胞依赖性的细胞清除的关键的限制步骤,了解这类对固有免疫细胞的细胞毒性能力的限制有助于开发mAb疗法,或可进一步优化ADCP,并改善患者预后。<a href='/topic/show?id=e2a54816ecc' target=_blank style='color:#2F92EE;'>#巨噬细胞#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=177, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=48167, encryptionId=e2a54816ecc, topicName=巨噬细胞)], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20210725/69b5882b3c3845c19efa131b4ff8b1f7/06ccd8f1857e4e14862049ab235618eb.jpg, createdBy=74c72110107, createdName=qinqiyun, createdTime=Sat Jun 20 22:22:52 CST 2020, time=2020-06-20, status=1, ipAttribution=)]
    2020-09-01 wgx306
  3. [GetPortalCommentsPageByObjectIdResponse(id=1912393, encodeId=53611912393d4, content=<a href='/topic/show?id=4de7112046c' target=_blank style='color:#2F92EE;'>#mAb#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=29, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=11204, encryptionId=4de7112046c, topicName=mAb)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=25e7304, createdName=snf701207, createdTime=Fri May 28 14:28:20 CST 2021, time=2021-05-28, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1813278, encodeId=f91b18132e801, content=<a href='/topic/show?id=92b5918e845' target=_blank style='color:#2F92EE;'>#诱导性#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=45, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=91878, encryptionId=92b5918e845, topicName=诱导性)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=4193478, createdName=wgx306, createdTime=Tue Sep 01 20:28:20 CST 2020, time=2020-09-01, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1942896, encodeId=d421194289666, content=<a href='/topic/show?id=c05c391e55f' target=_blank style='color:#2F92EE;'>#吞噬作用#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=40, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=39175, encryptionId=c05c391e55f, topicName=吞噬作用)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=1ce4238, createdName=dangious, createdTime=Thu Nov 26 08:28:20 CST 2020, time=2020-11-26, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=799292, encodeId=387ee99292d9, content=hypophagia是通过ADCP进行的巨噬细胞依赖性的细胞清除的关键的限制步骤,了解这类对固有免疫细胞的细胞毒性能力的限制有助于开发mAb疗法,或可进一步优化ADCP,并改善患者预后。<a href='/topic/show?id=e2a54816ecc' target=_blank style='color:#2F92EE;'>#巨噬细胞#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=177, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=48167, encryptionId=e2a54816ecc, topicName=巨噬细胞)], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20210725/69b5882b3c3845c19efa131b4ff8b1f7/06ccd8f1857e4e14862049ab235618eb.jpg, createdBy=74c72110107, createdName=qinqiyun, createdTime=Sat Jun 20 22:22:52 CST 2020, time=2020-06-20, status=1, ipAttribution=)]
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    2020-06-20 qinqiyun

    hypophagia是通过ADCP进行的巨噬细胞依赖性的细胞清除的关键的限制步骤,了解这类对固有免疫细胞的细胞毒性能力的限制有助于开发mAb疗法,或可进一步优化ADCP,并改善患者预后。#巨噬细胞#

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