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NEJM:Moderna的COVID-19候选疫苗在所有受试者中诱导了强烈的免疫应答

2020-07-15 MedSci原创 MedSci原创

Moderna的COVID-19疫苗mRNA-1273在所有受试者中,均诱导产生抗SARS-CoV-2抗体,并具有中和活性。

NEJM周二发表Moderna公司COVID-19候选疫苗正在进行的I期临床中期分析结果,结果显示Moderna的COVID-19疫苗mRNA-1273在所有受试者中均诱导了抗SARS-CoV-2免疫应答。其它疫苗见:当前最有潜力新冠疫苗TOP 5

Image result for moderna vaccine covid-19

Moderna首席医学官Tal Zaks表示,数据“证明接种mRNA-1273疫苗可在所有剂量水平均引发强烈的免疫反应,并且也支持III期临床研究中的初次和加强方案中选用100 mcg作为最佳剂量。”III期临床试验定于7月27日开始。

抗体的产生和T细胞反应

最新分析显示初次接种后,mRNA-1273可在所有受试者体内,诱导全长SARS-CoV-2刺突蛋白的结合抗体,并且呈现剂量依赖性地增加。两次疫苗接种后的第57天,受试者平均滴度水平超过了COVID-19确诊患者恢复期血清中的平均滴度。

Moderna还表示两次疫苗接种后,mRNA-1273可引起明显的中和抗体滴度,并且在第43天的所有受试者中均观察到针对SARS-CoV-2的中和活性。此外,在III期选择的100 mcg剂量下,第57天的平均滴度比恢复期血清中的水平高2.1倍。

并且第二次疫苗接种后,mRNA-1273“引起了Th1的CD4 T细胞反应,而非Th2的CD4 T细胞反应。”目前正在评估免疫反应的持久性,第二次接种疫苗后将对受试者进行一年的随访。

第二剂后副作用更常见

两剂疫苗注射后均是安全的,到第57天仍无严重毒性,并且在首次接种后的全身不良事件为轻度或中度等级。但是第二次疫苗接种后,引起全身性不良反应的情况更为普遍,在25 mcg组的13名参与者中有7例发生,100 mcg组的所有15名受试者均发生,250 mcg组的所有14名受试者均发生。在两次疫苗接种中,超过一半的参与者发生了全身和局部不良事件,包括疲劳(80%),畏寒(80%),头痛(60%)和肌痛(53%)。

作者说:“这些安全性和免疫原性的发现支持mRNA-1273疫苗进入后期临床试验。” 同时,Moderna指出,这项第一阶段研究的其他人群已经完成招募,包括3名年龄在56至70岁之间的老年人和另外3名年龄在71岁及以上的老年人。这些数据预计将单独发布。此外,一项针对600名健康成年人的mRNA-1273的II期试验也正在进行中,该试验将评估50 mcg和100 mcg的剂量。

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当前最有潜力新冠疫苗TOP 5

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继牛津大学顶级新冠疫苗动物试验失败后,Science同日连发两篇论文称疫苗研发迎来新突破

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原始出处:

Jackson LA, Anderson EJ, Rouphael NG, Roberts PC, Makhene M, Coler RN, McCullough MP, Chappell JD, Denison MR, Stevens LJ, Pruijssers AJ, McDermott A, Flach B, Doria-Rose NA, Corbett KS, Morabito KM, O'Dell S, Schmidt SD, Swanson PA 2nd, Padilla M, Mascola JR, Neuzil KM, Bennett H, Sun W, Peters E, Makowski M, Albert J, Cross K, Buchanan W, Pikaart-Tautges R, Ledgerwood JE, Graham BS, Beigel JH; mRNA-1273 Study Group. An mRNA Vaccine against SARS-CoV-2 - Preliminary Report. N Engl J Med. 2020 Jul 14. doi: 10.1056/NEJMoa2022483.

https://www.firstwordpharma.com/node/1740519?tsid=28&region_id=6

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    2020-07-23 柳叶一刀
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    2020-07-15 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

    0

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    2020-07-15 lovetcm

    #新冠疫苗#新冠疫苗的研发又成为全球研发的制高点,哪家疫苗先出来就掌握的主动权。

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