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NEJM:ALVAC-HIV疫苗接种方案在南非2b-3期临床研究失败

2021-03-25 MedSci原创 MedSci原创

ALVAC-HIV+AIDSVAX B/E疫苗方案在南非2b-3期临床试验中失败,该方案不能降低HIV感染风险

全世界约有7570万人类免疫缺陷病毒(HIV) 感染者,大多数在撒哈拉以南非洲,主要是HIV-1C亚型。虽然抗病毒药物在抑制HIV传播方面发挥了重要作用,但一种安全、有效的疫苗对于根除人类免疫缺陷病毒感染至关重要。先前在泰国开展的研究中,金丝雀痘病毒载体疫苗(ALVAC-HIV+AIDSVAX B/E)在减少感染方面显示出一定效果。在南非开展的1-2a期试验中,该方案显示出强大的体液和细胞反应效果。
近日研究人员公布了ALVAC-HIV+AIDSVAX B/E免疫方案在南非2b-3期临床研究结果。
在本次2b-3期试验中,5404名基线未感染HIV-1的成年人接受疫苗(2704名参与者)或安慰剂接种(2700名参与者)。疫苗接种方案为在基线和第1个月注射ALVAC-HIV,然后在第3个月、第6个月、第12个月和第18个月强化注射四次ALVAC-HIV,强化接种时,同时接种gp120蛋白的亚单位疫苗和MF59佐剂。研究的主要疗效终点为至24个月时HIV-1感染率。
 
2020年1月,中期分析显示ALVAC-HIV+AIDSVAX B/E方案在预防HIV感染方面无效,随后停止了后续疫苗接种。试验参与者的中位年龄为24岁,70%女性。疫苗组和安慰剂组的不良事件发生率相似。在24个月的随访中,疫苗组138名参与者和安慰剂组133名参与者被诊断为HIV-1感染(危险比1.02)。
ALVAC-HIV+AIDSVAX B/E疫苗方案在南非2b-3期临床试验中失败,该方案不能降低HIV感染风险
 
原始出处:
 
Glenda E. Gray et al. Vaccine Efficacy of ALVAC-HIV and Bivalent Subtype C gp120-MF59 in Adults. N Engl J Med, March 25, 2021.

 

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    2021-03-25 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

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