Nat Med:1期临床试验表明广泛中和抗体PGT121可长期抑制患者体内的HIV感染

2021-10-21 John 生物谷

自首次公布关于获得性免疫缺乏综合征(AIDS,俗称艾滋病)的报告以来的40年中,超过3200万人死于导致艾滋病的病毒--人类免疫缺陷病毒(HIV)。

自首次公布关于获得性免疫缺乏综合征(AIDS,俗称艾滋病)的报告以来的40年中,超过3200万人死于导致艾滋病的病毒--人类免疫缺陷病毒(HIV)。如今,鉴于全世界有超过3500万HIV感染者,每年有近200万新病例,HIV仍然是一种主要的全球流行病。

 

 

广泛中和抗体(bNAB)靶向这种病毒外部的特定蛋白。在一项1期临床试验中,来自美国贝斯以色列女执事医疗中心(BIDMC)等研究机构的研究人员评估了一种称为PGT121的广泛中和抗体治疗和预防HIV-1感染的能力。他们发现,该抗体是安全的,试验参与者耐受性良好,并且它在感染HIV的成年人中也表现出抗病毒活性。相关研究结果发表在2021年10月的Nature Medicine期刊上。

 

在这项纳入感染和未感染HIV的成年人以及正在接受抗逆转录病毒疗法(ART)以抑制HIV感染的成年人的安慰剂对照临床试验中确定了该抗体的安全性和耐受性之后,这些作者接下来在未接受ART治疗因而携带可检测的病毒载量的HIV成年人中评估了该抗体。在参与这项临床试验这一部分的13名参与者中,有9人被发现在基线时具有高病毒载量(每毫升血液超过2000个病毒拷贝),4人被发现在基线时具有低病毒载量(每毫升血液少于2000个拷贝)。

 

在接受单剂的这种抗体后,基线病毒载量高的人的病毒载量下降,并持续下降7至10天,到第28天时反弹到基线水平。在低病毒载量组中,所有四个参与者的病毒载量都有所下降,其中2人的病毒载量在第28天时反弹到基线水平。不过,另外两人表现出更长时间的病毒抑制。

 


图片来自Pixabay/CC0 Public Domain

 

论文通讯作者、贝斯以色列女执事医疗中心病毒学与疫苗研究中心主任Dan H. Barouch博士说,“值得注意的是,在基线时病毒载量较低的两人在单次输注抗体后表现出超过168天的无药物病毒抑制。直到第252天将一名参与者带回进行长期延长研究时,才在该参与者身上检测到病毒反。据我们所知,这是文献中报道的任何单一或联合广泛中和抗体治疗HIV后观察到的最长时间的无ART病毒载量抑制。”

 

与以前对HIV抗体治疗的研究一致,这些作者还观察到这13名参与者中的12人出现了对这种抗体的至少部分耐药性---HIV对药物疗法和疫苗策略快速进化的能力是该病毒如此难以根除的原因之一。然而,他们指出,这项研究的结果表明,这种实验性抗体可能比迄今为止测试的其他单一广泛中和抗体具有更大的效力。

 

论文共同第一作者、贝斯以色列女执事医疗中心病毒学与疫苗研究中心研究员Kathryn E. Stephenson博士说,“总而言之,该抗体治疗是安全的,耐受性良好,对携带可检测病毒载量的HIV-1感染者有快速的抗病毒作用。这些数据表明,应该进一步测试这种抗体维持病毒抑制或阻断HIV感染的能力,特别是在与其他广义中和抗体联合使用的情形下。”另一名论文共同第一作者为贝斯以色列女执事医疗中心的Boris Julg博士。

 

参考资料:
Kathryn E. Stephenson et al. Safety, pharmacokinetics and antiviral activity of PGT121, a broadly neutralizing monoclonal antibody against HIV-1: a randomized, placebo-controlled, phase 1 clinical trial. Nature Medicine, 2021, doi:10.1038/s41591-021-01509-0.

 

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    2022-02-06 liye789132251
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    2021-10-21 1207866fm50(暂无昵称)

    谢谢分享

    0

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    2021-10-21 平平淡淡123

    学习

    0

  6. [GetPortalCommentsPageByObjectIdResponse(id=1885466, encodeId=5af01885466c1, content=<a href='/topic/show?id=3b2112532d8' target=_blank style='color:#2F92EE;'>#Nat#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=34, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=12532, encryptionId=3b2112532d8, topicName=Nat)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=2e6f107, createdName=liye789132251, createdTime=Sun Feb 06 14:32:31 CST 2022, time=2022-02-06, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1511543, encodeId=070415115430a, content=<a href='/topic/show?id=5ea34916196' target=_blank style='color:#2F92EE;'>#广泛中和抗体#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=53, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=49161, encryptionId=5ea34916196, topicName=广泛中和抗体)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=fb4c10357319, createdName=fmq_28614556, createdTime=Sat Oct 23 05:32:31 CST 2021, time=2021-10-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1611303, encodeId=3e871611303f2, content=<a href='/topic/show?id=eb6b1145939' target=_blank style='color:#2F92EE;'>#Med#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=46, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=11459, encryptionId=eb6b1145939, topicName=Med)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=552a19396740, createdName=ms3994565386320060, createdTime=Sat Oct 23 05:32:31 CST 2021, time=2021-10-23, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1062727, encodeId=2da41062e2750, content=谢谢分享, beContent=null, objectType=article, channel=null, level=null, likeNumber=93, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=644b2182796, createdName=1207866fm50(暂无昵称), createdTime=Thu Oct 21 21:12:05 CST 2021, time=2021-10-21, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1062628, encodeId=445a10626282b, content=学习, beContent=null, objectType=article, channel=null, level=null, likeNumber=83, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20211021/5bb46e2e1d844f1cb3d022d9766afd35/88b3555619874051828ca602b4bc049a.jpg, createdBy=d3f32509636, createdName=平平淡淡123, createdTime=Thu Oct 21 15:55:34 CST 2021, time=2021-10-21, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1062601, encodeId=39681062601cb, content=好文章,谢谢分享。, beContent=null, objectType=article, channel=null, level=null, likeNumber=76, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/Q0j4TwGTfTJlfgys76DEiaNtbYo2re3ibjrUPTRibEXRyFwAB4aAGiave842S0FQDf0wAoaH226NiaSoPPDzhndsf1g/132, createdBy=88b489038, createdName=yangchou, createdTime=Thu Oct 21 15:08:09 CST 2021, time=2021-10-21, status=1, ipAttribution=)]
    2021-10-21 yangchou

    好文章,谢谢分享。

    0

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