Abstract
The dysregulated expression of immune checkpoint molecules enables cancer cells to evade immune destruction. While blockade of inhibitory immune checkpoints like PD-L1 forms the basis of current cancer immunotherapies, a deficiency in costimulatory signals can render these therapies futile. CD58, a costimulatory ligand, plays a crucial role in antitumor immune responses, but the mechanisms controlling its expression remain unclear. Using two systematic approaches, we reveal that CMTM6 positively regulates CD58 expression. Notably, CMTM6 interacts with both CD58 and PD-L1, maintaining the expression of these two immune checkpoint ligands with opposing functions. Functionally, the presence of CMTM6 and CD58 on tumor cells significantly affects T cell-tumor interactions and response to PD-L1-PD-1 blockade. Collectively, these findings provide fundamental insights into CD58 regulation, uncover a shared regulator of stimulatory and inhibitory immune checkpoints, and highlight the importance of tumor-intrinsic CMTM6 and CD58 expression in antitumor immune responses.
Original language | English |
---|---|
Pages (from-to) | 1817-1828.e9 |
Number of pages | 11 |
Journal | Cancer Cell |
Volume | 41 |
Issue number | 10 |
Early online date | 31 Aug 2023 |
DOIs | |
Publication status | Published - 9 Oct 2023 |
Bibliographical note
Publisher Copyright:© 2023 The Author(s)
Funding
We would like to express our gratitude to the members of the Sun and Schumacher laboratories for their valuable discussions. We also extend our thanks to the core facilities at German Cancer Research Center (DKFZ) Heidelberg, including Flow Cytometry, Genomics and Proteomics, Light Microscopy, Center for Pre-clinical Research, and NKI-AVL core facilities Flow Cytometry, Genomics, Molecular Pathology & Biobanking (CFMPB), for their technical support and provision of biobank materials. We are grateful to F. Momburg for kindly sharing reagents. This work was supported by startup funding from National Center for Tumor Diseases ( NCT ) and DKFZ Heidelberg , DKFZ-MOST ( Israel Ministry of Science and Technology ) cooperation program (Ca 208), and European Union ( ERC , DRILL , 101078722 ) (to C.S.), The Queen Wilhelmina Cancer Research Award and European Union ( ERC , SENSIT , 742259 ) (to T.N.M.S.) (Views and opinions expressed are however those of the author(s) only and do not necessarily reflect those of the European Union or the European Research Council . Neither the European Union nor the granting authority can be held responsible for them), NWO (Dutch Research Council) Rubicon Fellowship (452182318), Cancer Research Institute ( CRI ) Irvington Fellowship (#3441) (to R.M.), NWO Vici Grant ( 016.Vici.170.033 ), the Cancer Genomics Center (CGC.nl), and Ammodo KNAW Award 2015 for Biomedical Sciences (to T.R.B.), the NWO supported X-omics Road Map program ( 184.034.019 ) (to A.J.R.H.), the Institute for Chemical Immunology , an NWO Gravitation project (to T.N.M.S. and A.J.R.H.), and the German Research Foundation ( CRC 1530 ) (to S.S.).
Funders | Funder number |
---|---|
DKFZ Heidelberg | |
DKFZ-MOST | |
DRILL | 101078722 |
National Center for Tumor Diseases | |
Queen Wilhelmina Cancer Research Award | |
SENSIT | 742259 |
Cancer Research Institute | |
Cancer Genomics Centre | 184.034.019 |
European Commission | |
European Research Council | |
Deutsche Forschungsgemeinschaft | CRC 1530 |
Nederlandse Organisatie voor Wetenschappelijk Onderzoek | 452182318 |
Ministry of Science and Technology, Israel | Ca 208 |
Chulabhorn Research Institute | 3441 |
Nationales Centrum für Tumorerkrankungen Heidelberg |