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Curcumin and NCLX inhibitors share anti-tumoral mechanisms in microsatellite-instability-driven colorectal cancer

Maxime Guéguinou 1, 2, * Sajida Ibrahim 2 Jérôme Bourgeais 3 Alison Robert 1 Trayambak Pathak 4 Xuexin Zhang 4 David Crottès 1 Jacques Dupuy 5 David Ternant 2, 6 Valérie Monbet 7 Roseline Guibon 1 Hector Flores-Romero 8, 9 Antoine Lefèvre 10 Stéphanie Lerondel 11 Alain Le Pape 11 Jean-François Dumas 1 Philippe G. Frank 1 Alban Girault 12 Romain Chautard 2 Françoise Guéraud 5 Ana García-Sáez 9, 8 Mehdi Ouaissi 6 Patrick Emond 10 Olivier Sire 13 Olivier Hérault 3 Gaëlle Fromont-Hankard 1 Christophe Vandier 1 David Tougeron 14, 15 Mohamed Trebak 4 William Raoul 1, 2 Thierry Lecomte 1, 2, 16, * 
Abstract : Background and aims: Recent evidences highlight a role of the mitochondria calcium homeostasis in the development of colorectal cancer (CRC). To overcome treatment resistance, we aimed to evaluate the role of the mitochondrial sodium-calcium-lithium exchanger (NCLX) and its targeting in CRC. We also identified curcumin as a new inhibitor of NCLX. Methods: We examined whether curcumin and pharmacological compounds induced the inhibition of NCLX-mediated mitochondrial calcium (mtCa2+) extrusion, the role of redox metabolism in this process. We evaluated their anti-tumorigenic activity in vitro and in a xenograft mouse model. We analyzed NCLX expression and associations with survival in The Cancer Genome Atlas (TCGA) dataset and in tissue microarrays from 381 patients with microsatellite instability (MSI)-driven CRC. Results: In vitro, curcumin exerted strong anti-tumoral activity through its action on NCLX with mtCa2+ and reactive oxygen species overload associated with a mitochondrial membrane depolarization, leading to reduced ATP production and apoptosis. NCLX inhibition with pharmacological and molecular approaches reproduced the effects of curcumin. NCLX inhibitors decreased CRC tumor growth in vivo. Both transcriptomic analysis of TCGA dataset and immunohistochemical analysis of tissue microarrays demonstrated that higher NCLX expression was associated with MSI status, and for the first time, NCLX expression was significantly associated with recurrence-free survival. Conclusions: Our findings highlight a novel anti-tumoral mechanism of curcumin through its action on NCLX and mitochondria calcium overload that could benefit for therapeutic schedule of patients with MSI CRC.
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https://hal.inrae.fr/hal-03668944
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Soumis le : lundi 23 mai 2022 - 14:25:07
Dernière modification le : vendredi 5 août 2022 - 11:25:03

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2022.01.18.476775v2.full.pdf
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Maxime Guéguinou, Sajida Ibrahim, Jérôme Bourgeais, Alison Robert, Trayambak Pathak, et al.. Curcumin and NCLX inhibitors share anti-tumoral mechanisms in microsatellite-instability-driven colorectal cancer. Cellular and Molecular Life Sciences, Springer Verlag, 2022, 79 (6), pp.article n° 284. ⟨10.1007/s00018-022-04311-4⟩. ⟨hal-03668944⟩

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