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Derangère, V; Chevriaux, A; Courtaut, F; Bruchard, M; Berger, H; Chalmin, F; Causse, S Z; Limagne, E; Végran, F; Ladoire, S; Simon, B; Boireau, W; Hichami, A; Apetoh, L; Mignot, G; Ghiringhelli, F; Rébé, C
Cell death and differentiation, 12/2014, Letnik: 21, Številka: 12Journal Article
Liver X receptors (LXRs) have been proposed to have some anticancer properties, through molecular mechanisms that remain elusive. Here we report for the first time that LXR ligands induce caspase-1-dependent cell death of colon cancer cells. Caspase-1 activation requires Nod-like-receptor pyrin domain containing 3 (NLRP3) inflammasome and ATP-mediated P2 × 7 receptor activation. Surprisingly, LXRbeta is mainly located in the cytoplasm and has a non-genomic role by interacting with pannexin 1 leading to ATP secretion. Finally, LXR ligands have an antitumoral effect in a mouse colon cancer model, dependent on the presence of LXRbeta, pannexin 1, NLRP3 and caspase-1 within the tumor cells. Our results demonstrate that LXRbeta, through pannexin 1 interaction, can specifically induce caspase-1-dependent colon cancer cell death by pyroptosis.
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