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. 2025 Nov 17.
doi: 10.1038/s41590-025-02321-5. Online ahead of print.

Thrombospondin-1-CD47 signaling contributes to the development of T cell exhaustion in cancer

Affiliations

Thrombospondin-1-CD47 signaling contributes to the development of T cell exhaustion in cancer

Chien-Huan Weng et al. Nat Immunol. .

Abstract

T cell exhaustion is a major barrier to effective cancer immunotherapy. Although immune checkpoint blockade can reinvigorate exhausted T cells, not all patients achieve long-term responses, partly due to the refractory nature of terminally exhausted T cells. Beyond persistent antigen stimulation, the environmental drivers of exhaustion remain to be thoroughly characterized. Here we identify CD47 upregulation in tumor-infiltrating exhausted CD8+ T cells in both human and murine tumors. We reveal a novel role for the extracellular matrix protein thrombospondin-1 (TSP-1) in engaging CD47 on T cells to promote exhaustion. This interaction activates calcineurin-NFAT signaling, inducing upregulation of TOX and expression of inhibitory receptors, and impairing effector function during tumor progression. Importantly, disrupting the TSP-1-CD47 axis prevents T cell exhaustion and enhances tumor control. Our findings identify a novel pathway promoting T cell dysfunction and suggest that targeting the TSP-1-CD47 axis is a promising strategy to enhance T cell immunity and immunotherapy efficacy.

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Conflict of interest statement

Competing interests: C.-H.W., A.A., L.D., L.M.-P., L.M., Y.M., C.L., S.M., J.F.K., I.S., D.Z., L.H., F.S., S.P. and D.S. declare no competing interests related to this work. S.B. received royalties from Agenus for work on LAG-3 and TIM-3. D.H. is an inventor on patent applications related to work on OX40 and GITR. R.Z. is an inventor on patent applications related to work on GITR, PD-1 and CTLA4. R.Z. is consultant for Leap Therapeutics, Daiichi Sankyo and IFLI, serves as an SAB member for iTeos Therapeutics and receives grant support from Bristol Myers Squibb and Astrazeneca. P.M.H. was employed by Surface Oncology and is currently employed by InduPro. E.J.W. is a member of the Parker Institute for Cancer Immunotherapy. E.J.W. is an advisor for Absci, Arpelos Biosciences, Arsenal Biosciences, Coherus, Danger Bio, IpiNovyx, New Limit, Marengo, Pluto Immunotherapeutics, Related Sciences, Santa Ana Bio and Synthekine. E.J.W. is a founder of Arpelos Biosciences, Arsenal Biosciences and Danger Bio, and holds stock in Coherus. N.A. is a consultant for Shennon Biosciences, Panther Life Science, Verrica, Janssen, Immunitas, 23&me, Cellino, Kumquat and Genmab, and serves as an SAB member for Network Bio. J.D.W is a consultant for Ankyra Therapeutics, Apricity, Arsenal Biosciences, Ascentage Pharma, Bicara Therapeutics, Bristol Myers Squibb, Daiichi Sankyo, Imvaq, Takeda, Tizona, Trishula Therapeutics, Immunocore (Data Safety Board) and Scancell. J.D.W. received grant/research support from Bristol Myers Squibb. J.D.W. has equity in Apricity, Arsenal IO/CellCarta, Ascentage, Imvaq, Linneaus, Georgiamune, Maverick/Takeda, Tizona Therapeutics and Xenimmune. J.D.W. is an inventor on the following patents: Xenogeneic DNA vaccines, Newcastle disease viruses for cancer therapy, Myeloid-derived suppressor cell (MDSC) assay, Prediction of responsiveness to treatment with immunomodulatory therapeutics and method of monitoring abscopal effects during such treatment, Anti-PD-1 antibody, Anti-CTLA4 antibodies, Anti-GITR antibodies and methods of use thereof. T.M. acted in the capacity of consultant for Immunos Therapeutics, Daiichi Sankyo Co, TigaTx, Normunity and Pfizer. T.M. is a cofounder of and equity holder in IMVAQ Therapeutics. T.M. has received research support from Surface Oncology, Kyn Therapeutics, Infinity Pharmaceuticals, Peregrine Pharmaceuticals, Adaptive Biotechnologies, Leap Therapeutics, Aprea Therapeutics, Enterome SA and Realta Life Sciences, and currently receives research funding from Bristol Myers Squibb. T.M. is an inventor on patent applications related to work on oncolytic viral therapy, alpha virus–based vaccine, neoantigen modeling, immunomodulatory nanoparticles, bi-specific activators, FLT3L, CD40, IL-10, IL10R, GITR, OX40, PD-1, CTLA4 and chimeric receptors targeting melanoma differentiation antigens, B7-H3 and MUC-16, and listed as an inventor on a US Provisional Patent Application (Ser. No. 63/888,188) related to work on CD47 and TSP-1.

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