| Title: |
SARS-CoV-2 spike-specific nasal-resident CD49a+CD8+ memory T cells exert immediate effector functions with enhanced IFN-γ production |
| Authors: |
Min-Seok Rha, Gyeongyeob Kim, Sol Lee, Jihye Kim, Yeonsu Jeong, Chan Min Jung, Hae Eun Noh, Ji Yun Noh, Yong Min Kim, Hyung-Ju Cho, Chang-Hoon Kim, Eui-Cheol Shin |
| Source: |
Nature Communications, Vol 15, Iss 1, Pp 1-12 (2024) |
| Publisher Information: |
Nature Portfolio, 2024. |
| Publication Year: |
2024 |
| Collection: |
LCC:Science |
| Subject Terms: |
Science |
| More Details: |
Abstract Virus-specific nasal resident T cells are important for protection against subsequent infection with a similar virus. Here we examine the phenotypes and functions of SARS-CoV-2-specific T cells in the nasal mucosa of vaccinated individuals with breakthrough infection (BTI) or without infection. Nasal tissues are obtained from participants during sinus surgery. Analysis of activation-induced markers implicates that a considerable proportion of spike (S)-reactive nasal CD8+ T cells express CD103, a tissue-resident marker. MHC-I multimer staining is performed to analyze the ex vivo phenotype and function of SARS-CoV-2 S-specific CD8+ T cells. We detect multimer+CD8+ T cells with tissue-resident phenotypes in nasal tissue samples from vaccinees without infection as well as vaccinees with BTI. Multimer+CD8+ T cells remain present in nasal tissues over one year after the last exposure to S antigen, although the frequency decreases. Upon direct ex vivo stimulation with epitope peptides, nasal multimer+CD8+ T cells–particularly the CD49a+ subset–exhibit immediate effector functions, including IFN-γ production. CITE-seq analysis of S-reactive AIM+CD8+ T cells confirms the enhanced effector function of the CD49a+ subset. These findings indicate that among individuals previously exposed to S antigen by vaccination or BTI, S-specific nasal-resident CD49a+CD8+ memory T cells can rapidly respond to SARS-CoV-2 during infection or reinfection. |
| Document Type: |
article |
| File Description: |
electronic resource |
| Language: |
English |
| ISSN: |
2041-1723 |
| Relation: |
https://doaj.org/toc/2041-1723 |
| DOI: |
10.1038/s41467-024-52689-5 |
| Access URL: |
https://doaj.org/article/408f1076a04746e2bef49331da961307 |
| Accession Number: |
edsdoj.408f1076a04746e2bef49331da961307 |
| Database: |
Directory of Open Access Journals |
