Pannexin-1 expression in tumor cells correlates with colon cancer progression and survival.

Pannexin-1 (PANX1) is a hemichannel that releases ATP upon opening, initiating inflammation, cell proliferation, and migration. However, the role of PANX1 channels in colon cancer remains poorly understood, thus constituting the focus of this study. PANX1 mRNA expression was analyzed using multiple cancer databases. PANX1 protein expression and distribution were evaluated by immunohistochemistry on primary tumor tissue and non-tumor colonic mucosa from colon cancer patients. PANX1 inhibitors (probenecid or 10Panx) were used to assess colon cancer cell lines viability. To study the role of PANX1 in vivo, a subcutaneous xenograft model using HCT116 cells was performed in BALB/c NOD/SCID immunodeficient mice to evaluate tumor growth under PANX1 inhibition using probenecid. PANX1 mRNA was upregulated in colon cancer tissue compared to non-tumor colonic mucosa. Elevated PANX1 mRNA expression in tumors correlated with worse disease-free survival. PANX1 protein abundance was increased on tumor cells compared to epithelial cells in paired samples, in a cancer stage-dependent manner. In vitro and in vivo experiments indicated that blocking PANX1 reduced cell viability and tumor growth. PANX1 can be used as a biomarker of colon cancer progression and blocking PANX1 channel opening could be used as a potential therapeutic strategy against this disease. Copyright © 2024 The Authors. Published by Elsevier Inc. All rights reserved.

Citation

Aaron Fierro-Arenas, Glauben Landskron, Ilan Camhi-Vainroj, Benjamín Basterrechea, Daniela Parada-Venegas, Lorena Lobos-González, Karen Dubois-Camacho, Catalina Araneda, Camila Romero, Antonia Domínguez, Gonzalo Vásquez, Francisco López-K, Karin Alvarez, Carlos M González, Carolina Hager Ribeiro, Elisa Balboa, Eliseo Eugenin, Marcela A Hermoso, Marjorie De la Fuente López. Pannexin-1 expression in tumor cells correlates with colon cancer progression and survival. Life sciences. 2024 Aug 15;351:122851

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PMID: 38897345

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