Article Dans Une Revue Cancer Immunology, Immunotherapy Année : 2025

ZEB1 transcription factor induces tumor cell PD-L1 expression in melanoma

Résumé

Tumor cells can evade antitumor immune response by expressing the PD-L1 ligand, leading to the inhibition of PD-1expressing T lymphocytes. The mechanisms that regulate PD-L1 expression in cancer cells are imperfectly characterized. The transcription factor ZEB1, a major regulator of phenotype switching in melanoma cells, was shown to promote immune escape in melanoma by repressing T cell infiltration. Using inducible models of phenotype switching and ZEB1 gain/loss-offunction melanoma, we show that ZEB1 binds to the CD274 (PD-L1) promoter, directly enhancing PD-L1 mRNA transcription and its expression at the cell membrane. Furthermore, using single-cell spatial analyses on human primary melanoma samples, we demonstrate the correlation of ZEB1 and PD-L1 expression in tumor cells. Overall, these data identify ZEB1-mediated regulation of PD-L1 tumor expression as a mechanism that could contribute to immune escape in melanoma.

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hal-05022706 , version 1 (07-04-2025)

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Chloé Wirbel, Simon Durand, Félix Boivin, Maud Plaschka, Valentin Benboubker, et al.. ZEB1 transcription factor induces tumor cell PD-L1 expression in melanoma. Cancer Immunology, Immunotherapy, 2025, 74 (4), pp.141. ⟨10.1007/s00262-025-03978-5⟩. ⟨hal-05022706⟩
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