Related Experiment Video
Updated: Sep 12, 2025
A Macrophage-Tumor Spheroid Co-Invasion Assay
Published on: January 24, 2025
BCAP31 promotes colorectal cancer metastasis via oxidative phosphorylation-dependent macrophage immunosuppression: A
Yunduan He1, Haitao Song2, Huifang Lv1
1Department of Medical Oncology, The Affiliated Cancer Hospital of Zhengzhou University & Henan Cancer Hospital, Zhengzhou, 450008, China; State Key Laboratory of Esophageal Cancer Prevention & Treatment, Zhengzhou University, Zhengzhou, 450052, Henan Province, China; Henan Engineering Research Center of Precision Therapy of Gastrointestinal Cancer, Zhengzhou, 450008, Henan Province, China; Zhengzhou Key Laboratory for Precision Therapy of Gastrointestinal Cancer, Zhengzhou, 450008, Henan Province, China.
Abstract:
Colorectal cancer (CRC) is a highly heterogeneous malignancy with a complex tumor microenvironment (TME) that contributes to immunotherapy resistance. Through single-cell RNA sequencing (scRNA-seq) analysis of CRC tissues, we identified macrophages as a dominant immune subset (16 % of TME) that interacts with NK cells and fibroblasts via HLA-CD8A and COL1A1/2-CD44 signaling, promoting immunosuppression. We developed a 10-gene macrophage-related prognostic signature (including BCAP31, PKM, and IFNGR1) that effectively stratified patients into high- and low-risk groups, with high-risk cases exhibiting enriched M0/M2 macrophages, Treg infiltration, and resistance to immunotherapy (TIDE score, p = 2.5e-06). Functional validation revealed that BCAP31, a key risk gene, promotes CRC cell invasion and migration, while IFNGR1 demonstrated a protective role supported by Mendelian randomization (OR = 0.72). Our findings highlight the critical role of macrophage-driven immune dysregulation in CRC progression and propose BCAP31 as a potential therapeutic target, offering new insights into mitochondrial-immune crosstalk in the TME.
