MAIT cell activation augments adenovirus vector vaccine immunogenicity.

MAIT cell activation augments adenovirus vector vaccine immunogenicity.
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DOI:
10.1126/science.aax8819
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发表时间:
2021-01-29
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Klenerman P
Klenerman P
中科院分区:
其他
文献类型:
--
作者:
Provine NM;Amini A;Garner LC;Spencer AJ;Dold C;Hutchings C;Silva Reyes L;FitzPatrick MEB;Chinnakannan S;Oguti B;Raymond M;Ulaszewska M;Troise F;Sharpe H;Morgan SB;Hinks TSC;Lambe T;Capone S;Folgori A;Barnes E;Rollier CS;Pollard AJ;Klenerman P

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粘膜相关不变T细胞(MAIT)是病毒的天然感受器,可增强早期免疫反应并有助于保护。我们假设MAIT细胞在使用复制不能复制的腺病毒载体的疫苗平台中可能具有固有的佐剂活性。在小鼠和人类中,ChAdOx1(黑猩猩腺病毒OX1)免疫有力地激活了MAIT细胞。激活需要浆细胞样树突状细胞来源的干扰素-α和单核细胞来源的IL-18。干扰素-α诱导的单核细胞来源的肿瘤坏死因子也被认为是一个关键的次级信号。这三种细胞因子在体外和体内都是必需的。在人类志愿者中,MAIT细胞的激活与疫苗诱导的T细胞反应呈正相关,MAIT细胞缺陷小鼠对多种疫苗编码抗原的CD8+T细胞反应受损。因此,MAIT细胞有助于腺病毒载体的免疫原性,这对疫苗设计具有重要意义。
Mucosal-associated invariant T (MAIT) cells are innate sensors of viruses and can augment early immune responses and contribute to protection. We hypothesized MAIT cells may have inherent adjuvant activity in vaccine platforms that employ replication-incompetent adenovirus vectors. In mice and humans, ChAdOx1 (chimpanzee adenovirus Ox1) immunization robustly activated MAIT cells. Activation required plasmacytoid dendritic cell (pDC)–derived IFN-α and monocyte-derived IL-18. IFN-α-induced, monocyte-derived TNF was also identified as a key secondary signal. All three cytokines were required in vitro and in vivo. Activation of MAIT cells positively correlated with vaccine-induced T cell responses in human volunteers and MAIT cell-deficient mice displayed impaired CD8+ T cell responses to multiple vaccine-encoded antigens. Thus, MAIT cells contribute to the immunogenicity of adenovirus vectors, with implications for vaccine design.
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