1. Expansion of tissue-resident CD8+ T cells and CD4+ Th17 cells in the nasal mucosa following mRNA COVID-19 vaccination
- Author
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Hezhao Ji, Lyle R. McKinnon, Hai Nguyen, Severini G, Van Caeseele P, Aloysious Ssemaganda, Ruey-Chyi Su, Terry B. Ball, Catherine M. Card, Naima Jahan, Yoav Keynan, Derek R. Stein, Sandra Kiazyk, Faisal Nuhu, Bernard Abrenica, Jared Bullard, and Paul J. McLaren
- Subjects
business.industry ,CD69 ,hemic and immune systems ,chemical and pharmacologic phenomena ,Mucous membrane of nose ,Stimulation ,Vaccination ,medicine.anatomical_structure ,Immunology ,medicine ,Cytotoxic T cell ,CD154 ,business ,CD8 ,Respiratory tract - Abstract
Vaccines against SARS-CoV-2 have shown high efficacy in clinical trials, yet a full immunologic characterization of these vaccines, particularly within the upper respiratory tract, remains lacking. We enumerated and phenotyped T cells in nasal mucosa and blood before and after vaccination with the Pfizer-BioNTech COVID-19 vaccine (n =21). Tissue-resident memory (Trm) CD8+ T cells expressing CD69+CD103+ expanded ∼12 days following the first and second doses, by 0.31 and 0.43 log10cells per swab respectively (p=0.058 and p=0.009 in adjusted linear mixed models). CD69+CD103+CD8+ T cells in the blood decreased post-vaccination. Similar increases in nasal CD8+CD69+CD103-T cells were observed, particularly following the second dose. CD4+ Th17 cells were also increased in abundance following both doses. Following stimulation with SARS-CoV-2 spike peptides, CD8+ T cells increased expression of CD107a and CD154. These data suggest that nasal T cells may be induced and contribute to the protective immunity afforded by this vaccine.
- Published
- 2021
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