Improved Durability to SARS-CoV-2 Vaccine Immunity following Coimmunization with Molecular Adjuvant Adenosine Deaminase-1.
Improved Durability to SARS-CoV-2 Vaccine Immunity following Coimmunization with Molecular Adjuvant Adenosine Deaminase-1.
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与分子佐剂腺苷脱氨酶-1共同免疫可提高对SARS-CoV-2疫苗免疫的持久性。
DOI:
10.4049/jimmunol.2200056
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发表时间:
2022-07-01
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影响因子:
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中科院分区:
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While SARS-CoV-2 vaccines have demonstrated strong immunogenicity and protection, concerns about the duration and breadth of these responses remain. In this study, we show that co-delivery of plasmid-encoded adenosine deaminase-1 (pADA) with SARS-CoV-2 spike DNA antigens (pS), enhances immune memory and durability in vivo. Co-immunized mice displayed increased spike-specific IgG of higher affinity and neutralizing capacity as compared to pS-only immunized animals. Importantly, pADA significantly improved the longevity of these enhanced responses in vivo. This coincided with durable increases in frequencies of plasmablasts, receptor binding domain (RBD)-specific memory B cells, and SARS-CoV-2 specific T follicular helper cells. Increased spike-specific T cell polyfunctionality was also observed. Notably, animals co-immunized with pADA had significantly reduced viral loads compared to their non-adjuvanted counterparts in a SARS-CoV-2 infection model. These data suggest that pADA enhances immune memory and durability and supports further translational studies.
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