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Schlenker, R. ; Olguín-Contreras, L.F. ; Leisegang, M.* ; Schnappinger, J. ; Disovic, A. ; Rühland, S.* ; Nelson, P.J.* ; Leonhardt, H.* ; Harz, H.* ; Wilde, S.* ; Schendel, D.J.* ; Uckert, W.* ; Willimsky, G.* ; Nößner, E.

Chimeric PD-1:28 receptor upgrades low-avidity T cells and restores effector function of tumor-infiltrating lymphocytes for adoptive cell therapy.

Cancer Res. 77, 3577-3590 (2017)
Publ. Version/Full Text Research data DOI PMC
Open Access Green as soon as Postprint is submitted to ZB.
Inherent intermediate-to-low affinity T cell receptors (TCR) that develop during the natural course of immune responses may not allow sufficient activation for tumor elimination, making the majority of T cells suboptimal for adoptive T cell therapy (ATT). TCR affinity enhancement has been implemented to provide stronger T cell activity but carries the risk of creating undesired cross-reactivity leading to potential serious adverse effects in clinical application. We demonstrate here that engineering of low-avidity T cells recognizing a naturally processed and presented tumor-associated antigen with a chimeric PD-1:28 receptor increases effector function to levels seen with high-avidity T cells of identical specificity. Upgrading the function of low-avidity T cells without changing the TCR affinity will allow a large arsenal of low-avidity T cells previously thought to be therapeutically inefficient to be considered for ATT. PD-1:28 engineering re-instated Th1 function in tumor-infiltrating lymphocytes (TILs) that had been functionally disabled in the human renal cell carcinoma (RCC) environment without unleashing undesired Th2 cytokines or IL-10. Involved mechanisms may be correlated to restoration of ERK and AKT signaling pathways. In mouse tumor models of ATT, PD-1:28 engineering enabled low-avidity T cells to proliferate stronger and prevented PD-L1 upregulation and Th2 polarization in the tumor milieu. Engineered T cells combined with checkpoint blockade secreted significantly more IFN-γ compared to T cells without PD-1:28, suggesting a beneficial combination with checkpoint blockade therapy or other therapeutic strategies. Altogether, the supportive effects of PD-1:28 engineering on T cell function makes it an attractive tool for ATT.
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Publication type Article: Journal article
Document type Scientific Article
Corresponding Author
ISSN (print) / ISBN 0008-5472
e-ISSN 1538-7445
Journal Cancer Research
Quellenangaben Volume: 77, Issue: 13, Pages: 3577-3590 Article Number: , Supplement: ,
Publisher American Association for Cancer Research (AACR)
Publishing Place Philadelphia, Pa.
Non-patent literature Publications
Reviewing status Peer reviewed
Institute(s) CF Immunoanalytics (IMA)
Institute of Virology (VIRO)
Immunoanalytics (IMA)