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| Content Provider | frontiers |
|---|---|
| Author | Shao, Ming-Ming Yi, Feng-Shuang Huang, Zhong-Yin Peng, Peng Wu, Feng-Yao Shi, Huan-Zhong Zhai, Kan |
| Abstract | Characterization of T cell receptor (TCR) repertoires is essential for understanding the mechanisms of Mycobacterium tuberculosis (Mtb) infection involving T cell adaptive immunity. The characteristics of TCR sequences and distinctive signatures of T cell subsets in tuberculous patients are still unclear. By combining single-cell TCR sequencing (sc-TCR seq) with single-cell RNA sequencing (sc-RNA seq) and flow cytometry to characterize T cells in tuberculous pleural effusions (TPEs), we identified 41,718 CD3+ T cells in TPEs and paired blood samples, including 30,515 CD4+ T cells and 11,203 CD8+ T cells. Compared with controls, no differences in length and profile of length distribution were observed in complementarity determining region 3 (CDR3) in both CD4+ and CD8+ T cells in TPE. Altered hydrophobicity was demonstrated in CDR3 in CD8+ T cells and a significant imbalance in the TCR usage pattern of T cells with preferential expression of TRBV4-1 in TPE. A significant increase in clonality was observed in TCR repertoires in CD4+ T cells, but not in CD8+ T cells, although both enriched CD4+ and CD8+ T cells showed TH1 and cytotoxic signatures. Furthermore, we identified a new subset of polyfunctional CD4+ T cells with CD1-restricted, TH1, and cytotoxic characteristics, and this subset might provide protective immunity against Mtb. |
| ISSN | 1664302X |
| DOI | 10.3389/fmicb.2022.829694 |
| Volume Number | 13 |
| Journal | Frontiers in Microbiology |
| Language | English |
| Publisher Date | 2022-02-07 |
| Access Restriction | Open |
| Subject Keyword | Polyfunctional CD4+ T cells TCR repertoire Single-cell sequencing Tuberculous patients TRBV4-1 |
| Content Type | Text |
| Resource Type | Article |
| Subject | Microbiology Microbiology (medical) |
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