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Wang MS, Hu Y, Sanchez EE, Xie X, Roy NH, de Jesus M, Winer BY, Zale EA, Jin W, Sachar C, Lee JH, Hong Y, Kim M, Kam LC, Salaita K, Huse M. Mechanically active integrins target lytic secretion at the immune synapse to facilitate cellular cytotoxicity. Nat Commun 2022; 13:3222. [PMID: 35680882 PMCID: PMC9184626 DOI: 10.1038/s41467-022-30809-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Accepted: 05/19/2022] [Indexed: 01/25/2023] Open
Abstract
Cytotoxic lymphocytes fight pathogens and cancer by forming immune synapses with infected or transformed target cells and then secreting cytotoxic perforin and granzyme into the synaptic space, with potent and specific killing achieved by this focused delivery. The mechanisms that establish the precise location of secretory events, however, remain poorly understood. Here we use single cell biophysical measurements, micropatterning, and functional assays to demonstrate that localized mechanotransduction helps define the position of secretory events within the synapse. Ligand-bound integrins, predominantly the αLβ2 isoform LFA-1, function as spatial cues to attract lytic granules containing perforin and granzyme and induce their fusion with the plasma membrane for content release. LFA-1 is subjected to pulling forces within secretory domains, and disruption of these forces via depletion of the adaptor molecule talin abrogates cytotoxicity. We thus conclude that lymphocytes employ an integrin-dependent mechanical checkpoint to enhance their cytotoxic power and fidelity.
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Affiliation(s)
- Mitchell S Wang
- Immunology Program, Memorial Sloan Kettering Cancer Center, New York, NY, USA
- Pharmacology Program, Weill-Cornell Graduate School of Medical Sciences, New York, NY, USA
| | - Yuesong Hu
- Department of Chemistry, Emory University, Atlanta, GA, USA
| | - Elisa E Sanchez
- Immunology Program, Memorial Sloan Kettering Cancer Center, New York, NY, USA
- Biochemistry and Molecular Biology Program, Weill-Cornell Graduate School of Medical Sciences, New York, NY, USA
| | - Xihe Xie
- Neuroscience Program, Weill-Cornell Graduate School of Medical Sciences, New York, NY, USA
| | - Nathan H Roy
- Department of Microbiology and Immunology, State University of New York Upstate Medical University, Syracuse, NY, USA
| | - Miguel de Jesus
- Immunology Program, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Benjamin Y Winer
- Immunology Program, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Elizabeth A Zale
- Immunology Program, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Weiyang Jin
- Department of Biomedical Engineering, Columbia University, New York, NY, USA
| | - Chirag Sachar
- Department of Biomedical Engineering, Columbia University, New York, NY, USA
| | - Joanne H Lee
- Department of Biomedical Engineering, Columbia University, New York, NY, USA
| | - Yeonsun Hong
- Department of Microbiology and Immunology, University of Rochester Medical Center, Rochester, NY, USA
| | - Minsoo Kim
- Department of Microbiology and Immunology, University of Rochester Medical Center, Rochester, NY, USA
| | - Lance C Kam
- Department of Biomedical Engineering, Columbia University, New York, NY, USA
| | - Khalid Salaita
- Department of Chemistry, Emory University, Atlanta, GA, USA
| | - Morgan Huse
- Immunology Program, Memorial Sloan Kettering Cancer Center, New York, NY, USA.
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