Kidney Int: 评价第3剂mRNA疫苗在接受维持性血液透析患者中的合理性、安全性和疗效

2021-12-07 MedSci原创 MedSci原创

COVID-19大流行引起的各种警报包括其对终末期肾病患者人群的影响,尤其是需要中心血液透析的患者。该技术的后勤方面确实增加了SARS-Cov-2感染的风险,而根据MHD患者的高度共病特征,SARS-

COVID-19大流行引起的各种警报包括其对终末期肾病患者人群的影响,尤其是需要中心血液透析的患者。该技术的后勤方面确实增加了SARS-Cov-2感染的风险,而根据MHD患者的高度共病特征,SARS-Cov-2感染转化为高COVID-19死亡率。

接受维持性血液透析(MHD)的患者通过标准两剂COVID-19 mRNA疫苗达到的保护水平仍不清楚。为了研究这一点,我们使用法国肾脏流行病学和信息网络(REIN)登记研究比较了接受MHD的患者在未接种、接种1剂或2剂疫苗后诊断为COVID-19的1474例病例的发病率和严重程度。

疫苗接种显著降低了COVID-19发病率和严重程度,但两次接种后感染的患者中仍有11%死亡。接种2剂疫苗后,SARS-CoV-2初治患者缺乏疫苗保护可能是由于Tfh应答缺陷[38%患者刺突特异性CD4+T细胞干扰素γ释放试验阴性]和抗刺突受体结合域(RBD)IgG的病毒中和滴度无法产生(63%患者滴度等于或低于997 BAU/ml,定义为低/无应答者)。

为了提高保护力,ROMANOV队列的75例患者[57例低/无应答者,18例两次接种后高应答者]接种了第三剂疫苗,该队列前瞻性入组了接种BNT162b2(辉瑞)的MHD患者。这些患者对第三剂的耐受性极佳。2次接种的高应答者在3次接种后未产生更多的抗RBD IgG,但副作用更多。重要的是,31例(54%)2次接种的低/无应答者在3次接种后达到抗RBD IgG的中和滴度。在多变量分析中,2剂疫苗接种后γ干扰素释放试验阳性和/或抗RBD IgG滴度欠佳是第3次接种应答的唯一预测变量。

因此,标准的疫苗接种方案不能充分保护接受MHD的患者。2次接种后的抗RBD IgG和特异性CD4+T细胞应答可指导第3次接种的个性化给药,从而改善接受MHD的SARS-CoV-2初治患者的体液应答。

原文链接:https://pubmed.ncbi.nlm.nih.gov/34856313/

A prospective observational study for justification, safety, and efficacy of a third dose of mRNA vaccine in patients receiving maintenance hemodialysis.

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    2021-12-08 habb
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    2021-12-08 huagfeg
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    2021-12-08 gwc389

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