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. 2025 Nov;44(45):4427-4439.
doi: 10.1038/s41388-025-03590-y. Epub 2025 Oct 10.

Comprehensive single-cell analysis reveals mast cells' roles in cancer immunity

Affiliations

Comprehensive single-cell analysis reveals mast cells' roles in cancer immunity

Hao Qian et al. Oncogene. 2025 Nov.

Abstract

Mast cells, traditionally known for their roles in allergic reactions and pathogen defense, have been revealed to possess significant functional diversity within the tumor microenvironment (TME). Through single-cell RNA sequencing analysis across 15 solid tumors (385 samples from 264 patients), 10 distinct mast cell states characterized by unique gene expression patterns and functional attributes were identified. Notably, the C7-HLA-DR cluster that closely linked with antigen presentation, has emerged as a key player in shaping anti-tumor immune responses. In this study, systematic analysis demonstrated that the C7-HLA-DR cluster could interact with T cells to enhance the efficacy of immunotherapy and improve patients' prognosis. On the contrary, the C1-HSPA1 cluster exhibited pro-tumor characteristics, highlighting the functional diversity of mast cells within TME. These findings illustrate the landscape of mast cell within TME and propose a new avenue to boost the efficacy of immunotherapy.

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Conflict of interest statement

Competing interests: The authors declare no competing interests. Ethical approval: The study was approved by the Research Ethics Committee of Ruijin Hospital, School of Medicine, Shanghai Jiao Tong University and conducted in accordance with the Declaration of Helsinki. All subjects gave written informed consent before participating in the study.

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