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. 2025 Sep 25:S1535-6108(25)00393-9.
doi: 10.1016/j.ccell.2025.09.001. Online ahead of print.

Single-cell resolution spatial analysis of antigen-presenting cancer-associated fibroblast niches

Affiliations

Single-cell resolution spatial analysis of antigen-presenting cancer-associated fibroblast niches

Xiongfeng Chen et al. Cancer Cell. .

Abstract

Recent studies identify a unique subtype of cancer-associated fibroblasts (CAFs) termed antigen-presenting CAFs (apCAFs), which remain poorly understood. To gain a comprehensive understanding of the origin and function of apCAFs, we construct a fibroblast molecular atlas across 15 types of tissues and solid tumors. Our integration study unexpectedly reveals two distinct apCAF populations present in most cancer types: one associated with mesothelial-like cells and the other with fibrocytes. Using a high-resolution single-cell spatial imaging platform, we characterize the spatial niches of these apCAF populations. We find that mesothelial-like apCAFs are located near cancer cells, while fibrocyte-like apCAFs are associated with lymphocyte-enriched niches. Additionally, we discovered that both apCAF populations can up-regulate secreted phosphoprotein 1 (SPP1), which facilitates primary tumor formation, peritoneal metastasis, and therapy resistance. Taken together, this study offers an unprecedented resolution in analyzing apCAFs and their spatial niches.

Keywords: cancer-associated fibroblast; fibrocyte; mesothelial cell; pancreatic cancer; peritoneal metastasis.

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Conflict of interest statement

Declaration of interests The authors declare no competing interests.

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