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NEJM:预防慢性HCV感染的疫苗是否有效?

2021-02-11 MedSci原创 MedSci原创

导语:丙肝疫苗,比我们想象的更重要。

导语:丙肝疫苗,比我们想象的更重要。

丙型肝炎病毒(HCV)感染仍然是全世界最普遍的血源性病毒感染之一,同时也是全球传染病致死的主要原因。 尽管抗病毒疗法治愈率很高,但仍有超过7100万人患有慢性HCV感染,每年估计有175万例新感染和约40万人因此死亡。 从2009年到2018年,在阿片类药物注射增加的影响下,美国的HCV感染率增加了两倍。无法预防新的HCV感染是世界卫生组织2030年全球消除丙肝目标的主要阻碍。 预防性HCV疫苗将为通过中断传播实现消除目标提供重要工具。


研究人员利用黑猩猩腺病毒3(ChAd3)和修饰的牛痘安卡拉(MVA)载体(编码HCV基因型1b的非结构蛋白(NS))(ChAd3-NSmut和MVA-NSmut,GlaxoSmithKline)评估了异源性初始免疫-加强接种策略。 在第1阶段测试中,该疫苗方案具有临床可接受的安全性,并诱导了T细胞反应。


该试验的主要目的是评估ChAd3-NSmut和MVA-NSmut在高感染HCV感染者中的安全性,并确定预防慢性HCV的疫苗方案是否比安慰剂更有效防止感染。 该试验的次要目的是评估疫苗的免疫原性。


在此随机,双盲,安慰剂对照试验的1-2阶段中,我们评估了重组黑猩猩腺病毒3载体引发疫苗接种,然后进行了重组修饰牛痘安卡拉加强免疫; 两种疫苗均编码HCV非结构蛋白。 根据最近的注射吸毒史,被认为有HCV感染风险的成年人在第0和56天被随机分配(以1:1比例)接受疫苗或安慰剂。疫苗相关的严重不良事件 ,严重的局部或全身不良事件以及实验室不良事件是主要的安全终点。 主要疗效终点是慢性HCV感染,定义为持续病毒血症6个月。


共有548名参与者接受了随机分组,每组274名。 两组之间慢性HCV感染的发生率无显着差异。 在按协议人群中,每组14名参与者发生了慢性HCV感染(危险比[疫苗与安慰剂]为1.53; 95%置信区间[CI]为0.66至3.55;疫苗效力为−53%; 95% [CI],-255至34)。 在改良的意向性治疗人群中,疫苗组的19名参与者和安慰剂组的17名参与者发生了慢性HCV感染(危险比,1.66; 95%[CI],0.79至3.50;疫苗功效,-66%; 95%[CI] ,-250至21)。疫苗组和安慰剂组之间感染后HCV RNA几何平均峰值水平有所不同(分别为每毫升152.51×103 IU和每毫升1804.93×103 IU)。在疫苗组的78%的参与者中检测到了针对HCV的T细胞应答。 两组中有严重不良事件的参与者百分比相似。


实验结果表明,在该试验中,HCV疫苗接种方案不会引起严重的不良事件,能够产生HCV特异性的T细胞反应,并降低了HCV RNA峰值水平,但并不能预防慢性HCV感染。

 

原文出处:https://www.nejm.org/doi/full/10.1056/NEJMoa2023345?query=featured_home

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    2021-02-13 ymljack
  2. [GetPortalCommentsPageByObjectIdResponse(id=1257788, encodeId=5055125e788e9, content=<a href='/topic/show?id=774e856e22' target=_blank style='color:#2F92EE;'>#HCV#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=85, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=8567, encryptionId=774e856e22, topicName=HCV)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=460849, createdName=ymljack, createdTime=Sat Feb 13 05:38:50 CST 2021, time=2021-02-13, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1618989, encodeId=6ec91618989be, content=<a href='/topic/show?id=5f1785e9d5' target=_blank style='color:#2F92EE;'>#HCV感染#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=75, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=8579, encryptionId=5f1785e9d5, topicName=HCV感染)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=9cb419968800, createdName=12498e5fm18(暂无昵称), createdTime=Sat Feb 13 05:38:50 CST 2021, time=2021-02-13, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=924206, encodeId=b93492420648, content=学习了, beContent=null, objectType=article, channel=null, level=null, likeNumber=91, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=59321624668, createdName=zb1235672, createdTime=Thu Feb 11 23:15:25 CST 2021, time=2021-02-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=924194, encodeId=d03292419478, content=好文章!, beContent=null, objectType=article, channel=null, level=null, likeNumber=98, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20160806/IMG57A5698BDB0244113.jpg, createdBy=32a91358059, createdName=jyzxjiangqin, createdTime=Thu Feb 11 18:31:26 CST 2021, time=2021-02-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1035572, encodeId=925710355e2e3, content=顶刊就是顶刊,谢谢梅斯带来这么高水平的研究报道,我们科里同事经常看梅斯,分享梅斯上的信息, beContent=null, objectType=article, channel=null, level=null, likeNumber=81, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=旺医, createdTime=Thu Feb 11 17:38:50 CST 2021, time=2021-02-11, status=1, ipAttribution=)]
  3. [GetPortalCommentsPageByObjectIdResponse(id=1257788, encodeId=5055125e788e9, content=<a href='/topic/show?id=774e856e22' target=_blank style='color:#2F92EE;'>#HCV#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=85, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=8567, encryptionId=774e856e22, topicName=HCV)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=460849, createdName=ymljack, createdTime=Sat Feb 13 05:38:50 CST 2021, time=2021-02-13, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1618989, encodeId=6ec91618989be, content=<a href='/topic/show?id=5f1785e9d5' target=_blank style='color:#2F92EE;'>#HCV感染#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=75, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=8579, encryptionId=5f1785e9d5, topicName=HCV感染)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=9cb419968800, createdName=12498e5fm18(暂无昵称), createdTime=Sat Feb 13 05:38:50 CST 2021, time=2021-02-13, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=924206, encodeId=b93492420648, content=学习了, beContent=null, objectType=article, channel=null, level=null, likeNumber=91, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=59321624668, createdName=zb1235672, createdTime=Thu Feb 11 23:15:25 CST 2021, time=2021-02-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=924194, encodeId=d03292419478, content=好文章!, beContent=null, objectType=article, channel=null, level=null, likeNumber=98, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20160806/IMG57A5698BDB0244113.jpg, createdBy=32a91358059, createdName=jyzxjiangqin, createdTime=Thu Feb 11 18:31:26 CST 2021, time=2021-02-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1035572, encodeId=925710355e2e3, content=顶刊就是顶刊,谢谢梅斯带来这么高水平的研究报道,我们科里同事经常看梅斯,分享梅斯上的信息, beContent=null, objectType=article, channel=null, level=null, likeNumber=81, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=旺医, createdTime=Thu Feb 11 17:38:50 CST 2021, time=2021-02-11, status=1, ipAttribution=)]
    2021-02-11 zb1235672

    学习了

    0

  4. [GetPortalCommentsPageByObjectIdResponse(id=1257788, encodeId=5055125e788e9, content=<a href='/topic/show?id=774e856e22' target=_blank style='color:#2F92EE;'>#HCV#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=85, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=8567, encryptionId=774e856e22, topicName=HCV)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=460849, createdName=ymljack, createdTime=Sat Feb 13 05:38:50 CST 2021, time=2021-02-13, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1618989, encodeId=6ec91618989be, content=<a href='/topic/show?id=5f1785e9d5' target=_blank style='color:#2F92EE;'>#HCV感染#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=75, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=8579, encryptionId=5f1785e9d5, topicName=HCV感染)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=9cb419968800, createdName=12498e5fm18(暂无昵称), createdTime=Sat Feb 13 05:38:50 CST 2021, time=2021-02-13, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=924206, encodeId=b93492420648, content=学习了, beContent=null, objectType=article, channel=null, level=null, likeNumber=91, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=59321624668, createdName=zb1235672, createdTime=Thu Feb 11 23:15:25 CST 2021, time=2021-02-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=924194, encodeId=d03292419478, content=好文章!, beContent=null, objectType=article, channel=null, level=null, likeNumber=98, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20160806/IMG57A5698BDB0244113.jpg, createdBy=32a91358059, createdName=jyzxjiangqin, createdTime=Thu Feb 11 18:31:26 CST 2021, time=2021-02-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1035572, encodeId=925710355e2e3, content=顶刊就是顶刊,谢谢梅斯带来这么高水平的研究报道,我们科里同事经常看梅斯,分享梅斯上的信息, beContent=null, objectType=article, channel=null, level=null, likeNumber=81, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=旺医, createdTime=Thu Feb 11 17:38:50 CST 2021, time=2021-02-11, status=1, ipAttribution=)]
    2021-02-11 jyzxjiangqin

    好文章!

    0

  5. [GetPortalCommentsPageByObjectIdResponse(id=1257788, encodeId=5055125e788e9, content=<a href='/topic/show?id=774e856e22' target=_blank style='color:#2F92EE;'>#HCV#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=85, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=8567, encryptionId=774e856e22, topicName=HCV)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=460849, createdName=ymljack, createdTime=Sat Feb 13 05:38:50 CST 2021, time=2021-02-13, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1618989, encodeId=6ec91618989be, content=<a href='/topic/show?id=5f1785e9d5' target=_blank style='color:#2F92EE;'>#HCV感染#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=75, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=8579, encryptionId=5f1785e9d5, topicName=HCV感染)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=9cb419968800, createdName=12498e5fm18(暂无昵称), createdTime=Sat Feb 13 05:38:50 CST 2021, time=2021-02-13, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=924206, encodeId=b93492420648, content=学习了, beContent=null, objectType=article, channel=null, level=null, likeNumber=91, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=59321624668, createdName=zb1235672, createdTime=Thu Feb 11 23:15:25 CST 2021, time=2021-02-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=924194, encodeId=d03292419478, content=好文章!, beContent=null, objectType=article, channel=null, level=null, likeNumber=98, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20160806/IMG57A5698BDB0244113.jpg, createdBy=32a91358059, createdName=jyzxjiangqin, createdTime=Thu Feb 11 18:31:26 CST 2021, time=2021-02-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1035572, encodeId=925710355e2e3, content=顶刊就是顶刊,谢谢梅斯带来这么高水平的研究报道,我们科里同事经常看梅斯,分享梅斯上的信息, beContent=null, objectType=article, channel=null, level=null, likeNumber=81, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=旺医, createdTime=Thu Feb 11 17:38:50 CST 2021, time=2021-02-11, status=1, ipAttribution=)]
    2021-02-11 旺医

    顶刊就是顶刊,谢谢梅斯带来这么高水平的研究报道,我们科里同事经常看梅斯,分享梅斯上的信息

    0

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