The role of CD8 + T lymphocytes in chronic obstructive pulmonary disease: a systematic review

Williams, Maya; Todd, Ian; Fairclough, Lucy C.

Abstract

© 2020, The Author(s). Objective and design: This systematic review aims to establish the role of CD8 + T lymphocytes in COPD. Methods: Forty-eight papers published in the last 15years were identified for inclusion. Results: CD8 + T-cells are increased in the lungs of patients with COPD (17 studies, 16 positive) whereas in the circulation, findings were inconclusive. Activation of CD8 + T-cells was enhanced in lungs (four studies, three positive) but cell phenotype was unclear. There was substantial evidence of a higher proportion of type 1 CD8 + (Tc1) cells in COPD (11 studies, 9 positive), though the population of type 2 (Tc2) cells was also increased (5 studies, 4 positive). CD8 + T-cells in COPD exhibited greater expression of cytotoxic proteins (five studies, five positive). Studies assessed a variety of questions so evidence was insufficient to draw firm conclusions. The role of CD8 + T-cells at acute exacerbation of COPD and also their contribution to alveolar destruction can only be hypothesised at this stage. Conclusions: Not only is the number of CD8 + T-cells increased in COPD, these cells have increased capacity to exert effector functions and are likely to contribute to disease pathogenesis. Several mechanisms highlighted show promise for future investigation to consolidate current knowledge.

Citation

Williams, M., Todd, I., & Fairclough, L. C. (2020). The role of CD8 + T lymphocytes in chronic obstructive pulmonary disease: a systematic review. Inflammation Research, https://doi.org/10.1007/s00011-020-01408-z

• Journal Article Type: Article
• Acceptance Date: Oct 1, 2020
• Online Publication Date: Oct 10, 2020
• Publication Date: Oct 10, 2020
• Deposit Date: Oct 12, 2020
• Publicly Available Date: Oct 12, 2020
• Journal: Inflammation Research
• Print ISSN: 1023-3830
• Electronic ISSN: 1420-908X
• Publisher: Springer Verlag
• Peer Reviewed: Peer Reviewed
• DOI: https://doi.org/10.1007/s00011-020-01408-z
• Keywords: Immunology; Pharmacology
• Public URL: https://nottingham-repository.worktribe.com/output/4959761
• Publisher URL: https://link.springer.com/article/10.1007/s00011-020-01408-z