Nature:广谱的抗HIV中和抗体疗法优于抗HIV反转录的鸡尾酒疗法

2017-03-16 Leo.C MedSci原创

广谱的抗HIV的中和抗体疗法不同于传统的抗反转录的鸡尾酒疗法,能够引起长期的CD8 T细胞的免疫机制从而抑制HIV病毒量。

高效的广谱的抗HIV的中和抗体疗法在人源化老鼠,猕猴和人身上被证明能够预防和治疗慢病毒感染。在运用其免疫治疗慢病毒感染的实验过程中,在长期感染的动物上注射中和抗体能过暂时的抑制病毒复制,然而最终多多少少回复到注射前的病毒复制水平从而导致病状的继续发展。

在本期的Nature杂志中,Yoshiaki Nishimura及其同事再通过在猕猴身上感染类人猿/人类免疫缺陷病毒,发现如果在感染早期进行注射广谱中和抗体能够抑制病毒复制在一个非常低的水平,从而建立起一个长效的T细胞免疫机制。被感染的猕猴接受了单次为期两周的注射广谱中和抗体(3BNC117, 10-1074)。由于抗体半衰期的原因,在注射后的56-177天内,基本在体内检测不到病毒量。在13只接受广谱的抗HIV的中和抗体疗法的猕猴中,有四只在两年后依旧有CD4T细胞以及非常低的病毒量。但是如果在实验过程中,通过注射抗体消除掉CD8+的T细胞,会造成病毒含量的上升。相对的,如果猕猴没有接受中和抗体疗法,而是传统的抗反转录的鸡尾酒疗法,只要停止用药就会立刻造成病毒含量的反弹。

这项研究表明,广谱的抗HIV的中和抗体疗法不同于传统的抗反转录的鸡尾酒疗法,能够引起长期的CD8 T细胞的免疫机制从而抑制HIV病毒量。

原始出处:
Yoshiaki Nishimura, Rajeev Gautam, Tae-Wook Chun et al. Early antibody therapy can induce long-lasting immunity to SHIV. Nature (2017) doi:10.1038/nature21435

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    2017-08-05 liye789132251
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    2017-09-04 mjldent
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    2017-03-18 qblt
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