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Mohammed RN, Wehenkel SC, Galkina EV, Yates EK, Preece G, Newman A, Watson HA, Ohme J, Bridgeman JS, Durairaj RRP, Moon OR, Ladell K, Miners KL, Dolton G, Troeberg L, Kashiwagi M, Murphy G, Nagase H, Price DA, Matthews RJ, Knäuper V, Ager A. ADAM17-dependent proteolysis of L-selectin promotes early clonal expansion of cytotoxic T cells. Sci Rep 2019; 9:5487. [PMID: 30940840 PMCID: PMC6445073 DOI: 10.1038/s41598-019-41811-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Accepted: 03/12/2019] [Indexed: 01/15/2023] Open
Abstract
L-selectin on T-cells is best known as an adhesion molecule that supports recruitment of blood-borne naïve and central memory cells into lymph nodes. Proteolytic shedding of the ectodomain is thought to redirect activated T-cells from lymph nodes to sites of infection. However, we have shown that activated T-cells re-express L-selectin before lymph node egress and use L-selectin to locate to virus-infected tissues. Therefore, we considered other roles for L-selectin proteolysis during T cell activation. In this study, we used T cells expressing cleavable or non-cleavable L-selectin and determined the impact of L-selectin proteolysis on T cell activation in virus-infected mice. We confirm an essential and non-redundant role for ADAM17 in TCR-induced proteolysis of L-selectin in mouse and human T cells and show that L-selectin cleavage does not regulate T cell activation measured by CD69 or TCR internalisation. Following virus infection of mice, L-selectin proteolysis promoted early clonal expansion of cytotoxic T cells resulting in an 8-fold increase over T cells unable to cleave L-selectin. T cells unable to cleave L-selectin showed delayed proliferation in vitro which correlated with lower CD25 expression. Based on these results, we propose that ADAM17-dependent proteolysis of L-selectin should be considered a regulator of T-cell activation at sites of immune activity.
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Affiliation(s)
- Rebar N Mohammed
- Divsion of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, CF14 4XN, UK
- College of Veterinary Medicine, University of Sulaimani, Sulaimani, Kurdistan, Iraq
| | - Sophie C Wehenkel
- Divsion of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, CF14 4XN, UK
| | - Elena V Galkina
- Francis Crick Institute, London, NW1 1AT, UK
- Department of Microbiology and Molecular Cell Biology, Eastern Virginia Medical School, Norfolk, VA, 23507, USA
| | | | | | - Andrew Newman
- Divsion of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, CF14 4XN, UK
| | - H Angharad Watson
- Divsion of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, CF14 4XN, UK
| | - Julia Ohme
- Divsion of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, CF14 4XN, UK
| | - John S Bridgeman
- Divsion of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, CF14 4XN, UK
| | - Ruban R P Durairaj
- Divsion of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, CF14 4XN, UK
| | - Owen R Moon
- Divsion of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, CF14 4XN, UK
| | - Kristin Ladell
- Divsion of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, CF14 4XN, UK
| | - Kelly L Miners
- Divsion of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, CF14 4XN, UK
| | - Garry Dolton
- Divsion of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, CF14 4XN, UK
| | - Linda Troeberg
- Norwich Medical School, University of East Anglia, Norwich, NR4 7UQ, UK
| | | | - Gillian Murphy
- University of Cambridge Depratment of Oncology, Cancer Research UK Cambridge Insitute, Li Ka Shing Centre, Cambridge, CB2 0RE, UK
| | - Hideaki Nagase
- Kennedy Institute of Rheumatology, University of Oxford, Oxford, OX3 7FY, UK
| | - David A Price
- Divsion of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, CF14 4XN, UK
- Systems Immunity Research Institute, Cardiff University, Heath Park, Cardiff, CF14 4XN, UK
| | - R James Matthews
- Divsion of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, CF14 4XN, UK
| | - Vera Knäuper
- School of Dentistry, Cardiff University, Heath Park, Cardiff, CF14 4XN, UK
| | - Ann Ager
- Divsion of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, CF14 4XN, UK.
- Systems Immunity Research Institute, Cardiff University, Heath Park, Cardiff, CF14 4XN, UK.
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