Retrovirology:灭活的全HIV疫苗SAV001可引发抗HIV免疫应答,安全性良好

2016-12-05 MedSci MedSci原创

灭活的全HIV疫苗SAV001可引发抗HIV免疫应答,而且十分安全,但这种免疫应答是否预防HIV感染仍需进一步探索。

用灭活的全病毒颗粒制作疫苗来预防病毒性疾病已经十分普遍。然而,对于HIV疫苗,尽管灭活的全病毒疫苗在体内可以产生由抗体介导的强免疫应答的能力,但是由于固有的安全性问题,这种方法在很大程度上被人们所否定。HIV-1的分化体B NL4-3通常通过删除nef和vpu基因,并用蜜蜂蜂毒肽信号肽的编码序列取代Env信号肽的编码序列来减弱其毒性并增强复制能力。该试验通过将该遗传修饰的病毒(gmHIV-1NL4-3)灭活并配制成灭活的全HIV疫苗,然后用于I期人体临床试验(试验注册:临床试验NCT01546818)。试验将gmHIV-1NL4-3在A3.01人T细胞系中培养增殖,随后进行病毒纯化并用aldrithiol-2和γ-射线照射灭活。招募接受cART的33名HIV-1阳性志愿者进行单盲,安慰剂对照的I期人体临床试验以评估安全性和免疫原性。

实验结果显示,患者对该基因修饰并和灭活全HIV-1疫苗(SAV001)耐受良好,无严重不良事件。gmHIV-1NL4-3特异性PCR扩增结果显示,无论在体外的T淋巴细胞中,还是在接受了疫苗注射的患者体内,均无明显证据表明病毒出现明显复制增殖情况。此外, SAV001显着增加了对HIV-1蛋白的抗体应答。疫苗血浆中的抗体还发现了可识别感染细胞表面上的HIV-1包膜蛋白,并增强了抗HIV-1 B, D, 和 A 亚型的能力。

灭活的全HIV疫苗SAV001可引发抗HIV免疫应答,而且十分安全,但这种免疫应答是否预防HIV感染仍需进一步探索。

原始出处:Choi E, Michalski CJ, Choo SH, Kim GN, Banasikowska E, Lee S, et al. First Phase I human clinical trial of a killed whole-HIV-1 vaccine: demonstration of its safety and enhancement of anti-HIV antibody responses. Retrovirology 2016;13:82.

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    2017-04-26 一叶知秋
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    2016-12-07 studylzc

    学习了,期待更新的成果。

    0

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