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Identification of Highly Cross-Reactive Mimotopes for a Public T Cell Response in Murine Melanoma

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dc.creator Grace, Beth E.
dc.creator Backlund, Coralie M.
dc.creator Morgan, Duncan M.
dc.creator Kang, Byong H.
dc.creator Singh, Nishant K.
dc.creator Huisman, Brooke D.
dc.creator Rappazzo, C. Garrett
dc.creator Moynihan, Kelly D.
dc.creator Maiorino, Laura
dc.creator Dobson, Connor S.
dc.creator Kyung, Taeyoon
dc.creator Gordon, Khloe S.
dc.creator Holec, Patrick V.
dc.creator Mbah, Overbeck C. Takou
dc.creator Garafola, Daniel
dc.creator Wu, Shengwei
dc.creator Love, J. Christopher
dc.creator Wittrup, K. Dane
dc.creator Irvine, Darrell J.
dc.creator Birnbaum, Michael E.
dc.date 2022-07-11T18:11:14Z
dc.date 2022-07-11T18:11:14Z
dc.date 2022-06-23
dc.date.accessioned 2023-02-17T20:09:14Z
dc.date.available 2023-02-17T20:09:14Z
dc.identifier 1664-3224
dc.identifier https://hdl.handle.net/1721.1/143653
dc.identifier Grace, Beth E., Backlund, Coralie M., Morgan, Duncan M., Kang, Byong H., Singh, Nishant K. et al. 2022. "Identification of Highly Cross-Reactive Mimotopes for a Public T Cell Response in Murine Melanoma." Frontiers in Immunology, 13.
dc.identifier.uri http://localhost:8080/xmlui/handle/CUHPOERS/242134
dc.description <jats:p>While immune checkpoint blockade results in durable responses for some patients, many others have not experienced such benefits. These treatments rely upon reinvigorating specific T cell-antigen interactions. However, it is often unknown what antigens are being recognized by T cells or how to potently induce antigen-specific responses in a broadly applicable manner. Here, we characterized the CD8<jats:sup>+</jats:sup> T cell response to a murine model of melanoma following combination immunotherapy to determine the basis of tumor recognition. Sequencing of tumor-infiltrating T cells revealed a repertoire of highly homologous TCR sequences that were particularly expanded in treated mice and which recognized an antigen from an endogenous retrovirus. While vaccination against this peptide failed to raise a protective T cell response <jats:italic>in vivo</jats:italic>, engineered antigen mimotopes induced a significant expansion of CD8<jats:sup>+</jats:sup> T cells cross-reactive to the original antigen. Vaccination with mimotopes resulted in killing of antigen-loaded cells <jats:italic>in vivo</jats:italic> yet showed modest survival benefit in a prophylactic vaccine paradigm. Together, this work demonstrates the identification of a dominant tumor-associated antigen and generation of mimotopes which can induce robust functional T cell responses that are cross-reactive to the endogenous antigen across multiple individuals.</jats:p>
dc.format application/pdf
dc.publisher Frontiers Media SA
dc.relation 10.3389/fimmu.2022.886683
dc.relation Frontiers in Immunology
dc.rights Creative Commons Attribution 4.0 International license
dc.rights https://creativecommons.org/licenses/by/4.0/
dc.source Frontiers
dc.title Identification of Highly Cross-Reactive Mimotopes for a Public T Cell Response in Murine Melanoma
dc.type Article
dc.type http://purl.org/eprint/type/JournalArticle


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