Multifaceted role of BTLA in the control of CD8+ T cell fate after antigen encounter

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dc.contributor.authorRitthipichai, Krit
dc.contributor.authorHaymaker, Cara L.
dc.contributor.authorMartinez-Paniagua, Melisa A.
dc.contributor.authorAschenbrenner, Andrew
dc.contributor.authorYi, Xiaohui
dc.contributor.authorZhang, Minying
dc.contributor.authorKale, Charuta
dc.contributor.authorVence, Luis M.
dc.contributor.authorRoszik, Jason
dc.contributor.authorHailemichael, Yared
dc.contributor.authorOverwijk, William W.
dc.contributor.authorVaradarajan, Navin
dc.contributor.authorNurieva, Roza
dc.contributor.authorRadvanyi, Laszlo G.
dc.contributor.authorHwu, Patrick
dc.contributor.authorBernatchez, Chantale
dc.date.accessioned2020-03-11T17:06:07Z
dc.date.available2020-03-11T17:06:07Z
dc.date.issued2018-10
dc.description.abstractPurpose: Adoptive T-cell therapy using autologous tumor-infiltrating lymphocytes (TIL) has shown an overall clinical response rate 40%–50% in metastatic melanoma patients. BTLA (B-and-T lymphocyte associated) expression on transferred CD8+ TILs was associated with better clinical outcome. The suppressive function of the ITIM and ITSM motifs of BTLA is well described. Here, we sought to determine the functional characteristics of the CD8+BTLA+TIL subset and define the contribution of the Grb2 motif of BTLA in T-cell costimulation. Experimental Design: We determined the functional role and downstream signal of BTLA in both human CD8+ TILs and mouse CD8+ T cells. Functional assays were used including single-cell analysis, reverse-phase protein array (RPPA), antigen-specific vaccination models with adoptively transferred TCR-transgenic T cells as well as patient-derived xenograft (PDX) model using immunodeficient NOD-scid IL2Rgammanull (NSG) tumor-bearing mice treated with autologous TILs. Results: CD8+BTLA? TILs could not control tumor growth in vivo as well as their BTLA+ counterpart and antigen-specific CD8+BTLA? T cells had impaired recall response to a vaccine. However, CD8+BTLA+ TILs displayed improved survival following the killing of a tumor target and heightened “serial killing” capacity. Using mutants of BTLA signaling motifs, we uncovered a costimulatory function mediated by Grb2 through enhancing the secretion of IL-2 and the activation of Src after TCR stimulation. Conclusions: Our data portrays BTLA as a molecule with the singular ability to provide both costimulatory and coinhibitory signals to activated CD8+ T cells, resulting in extended survival, improved tumor control, and the development of a functional recall response. Clin Cancer Res; 23(20); 6151–64. ©2017 AACR.
dc.identifier.citationCopyright 2017 Clinical Cancer Research. This is a post-print version of a published paper that is available at: http://clincancerres.aacrjournals.org.ezproxy.lib.uh.edu/content/23/20/6151.Recommended citation:
dc.identifier.urihttps://hdl.handle.net/10657/6206
dc.language.isoen_US
dc.publisherClinical Cancer Research
dc.titleMultifaceted role of BTLA in the control of CD8+ T cell fate after antigen encounter
dc.typeArticle

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