TY - JOUR T1 - Mast Cells Directly Engage with Colorectal Cancer Cells to Drive Epithelial-to-Mesenchymal Transition A1 - Nikolaos Dimitris Papadopoulos A1 - Giorgos Konstantinos Vlachos JF - Archive of International Journal of Cancer and Allied Science JO - Arch Int J Cancer Allied Sci SN - 3108-4834 Y1 - 2022 VL - 2 IS - 1 DO - 10.51847/EzeMjxHQnU SP - 130 EP - 147 N2 - Mast cells (MCs), a type of granulocytic immune cell, can either support or inhibit colorectal cancer (CRC) progression. This duality may result from subtype-specific interactions between MCs and CRC cells. Notably, BRAF-mutant CRCs are enriched in intestinal secretory cell populations. Our study reveals that MCs are particularly abundant in BRAF-mutant CRC, likely attracted by factors secreted by these tumor-associated secretory cells. Using direct coculture experiments, we found that MCs induce epithelial-to-mesenchymal transition (EMT) in CRC cells, requiring both physical contact and calcium signaling. Disrupting LFA-1/ICAM1 integrin binding attenuated EMT-associated marker expression triggered by coculture. Moreover, MCs can transfer biomolecules, including mRNA, to CRC cells during these interactions. This research highlights a previously unreported contact-dependent pro-tumor role of MCs in CRC and demonstrates intercellular molecular transfer, suggesting that targeting MC–CRC interactions, especially through integrin pathways, may offer novel therapeutic strategies for aggressive CRC variants. UR - https://smerpub.com/article/mast-cells-directly-engage-with-colorectal-cancer-cells-to-drive-epithelial-to-mesenchymal-transitio-z8grkn1bikmulm9 ER -