期刊
NPJ VACCINES
卷 7, 期 1, 页码 -出版社
NATURE PORTFOLIO
DOI: 10.1038/s41541-022-00542-5
关键词
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资金
- NIH [K-08 AI073736, R56AI095692, R03 AR068118, R01 CA56821]
- Society of Memorial Sloan Kettering (MSK)
- MSK Technology Development Fund
- Parker Institute for Cancer Immunotherapy Career Development Award
- Swim across America
- Ludwig Institute for Cancer Research
- NIH/NCI Cancer Center Support Grant [P30 CA008748]
Protein or peptide-based subunit vaccines have shown promise in combating cancer or COVID-19. However, weak immune responses can be a concern. This study demonstrates that heat-inactivated MVA can serve as a potent vaccine adjuvant, enhancing T cell responses and antibody production.
Protein or peptide-based subunit vaccines have generated excitement and renewed interest in combating human cancer or COVID-19 outbreak. One major concern for subunit vaccine application is the weak immune responses induced by protein or peptides. Developing novel and effective vaccine adjuvants are critical for the success of subunit vaccines. Here we explored the potential of heat-inactivated MVA (heat-iMVA) as a vaccine adjuvant. Heat-iMVA dramatically enhances T cell responses and antibodies responses, mainly toward Th1 immune responses when combined with protein or peptide-based immunogen. The adjuvant effect of Heat-iMVA is stronger than live MVA and is dependent on the cGAS/STING-mediated cytosolic DNA-sensing pathway. In a therapeutic vaccination model based on tumor neoantigen peptide vaccine, Heat-iMVA significantly extended the survival and delayed tumor growth. When combined with SARS-CoV-2 spike protein, Heat-iMVA induced more robust spike-specific antibody production and more potent neutralization antibodies. Our results support that Heat-iMVA can be developed as a safe and potent vaccine adjuvant for subunit vaccines against cancer or SARS-CoV-2.
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