Nat Med:实体瘤成人接种两剂和三剂BNT162b2 mRNA疫苗的免疫反应

2021-10-01 MedSci原创 MedSci原创

第三剂BNT162b2疫苗接种是安全的,可提高针对SARS-CoV-2的体液免疫,并且可能对接受积极化疗的癌症患者具有免疫学益处。

针针对严重急性呼吸系统综合症冠状病毒2(SARS-CoV-2)的疫苗已显示出很高的疗效,但免疫功能低下的参与者被排除在对照临床试验之外。

近日,顶级医学期刊Nature Medicine上发表了一篇研究文章,在这项研究中,研究人员将接受活性细胞毒性抗癌治疗的实体瘤患者(n=53)与未患癌症的对照者(n=50)对BNT162b2mRNA冠状病毒病疫苗的免疫反应进行了比较。

第一次疫苗接种后,67%的癌症患者检测到了中和抗体,第二次疫苗接种后中和抗体滴度增加了三倍。刺突蛋白特异性血清抗体和T细胞也观察到了类似的模式,但这些反应中的每一个的幅度都相对于对照组而言有所减弱。在大多数癌症患者中,研究人员检测到刺突受体结合域和其他S1特异性记忆B细胞亚群是作为对额外免疫的记忆性反应潜在预测因子。因此,研究人员针对20名癌症队列参与者启动了第三剂BNT162b2(NCT04936997)疫苗接种的1期试验;该研究的主要结局为免疫反应,次要结局是其安全性。

在第三次疫苗接种后1周内,16名参与者中和抗体反应的中位数增加了三倍,但未观察到T细胞反应的改善,而且不良事件轻微。

这些结果表明,第三剂BNT162b2疫苗接种是安全的,可提高针对SARS-CoV-2的体液免疫,并且可能对接受积极化疗的癌症患者具有免疫学益处。

原始出处:

Rachna T. Shroff,et al.Immune responses to two and three doses of the BNT162b2 mRNA vaccine in adults with solid tumors.Nature Medicine.2021.https://www.nature.com/articles/s41591-021-01542-z

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    2022-08-07 liye789132251
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    2021-10-01 ms9000001217739185

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