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

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.

• Authors: Maxime Guéguinou, Sajida Ibrahim, Jérôme Bourgeais, Alison Robert, Trayambak Pathak, Xuexin Zhang, David Crottès, Jacques Dupuy, David Ternant, Valérie Monbet, Roseline Guibon, Hector Flores-Romero, Antoine Lefèvre, Stéphanie Lerondel, Alain Le Pape, Jean-François Dumas, Philippe G Frank, Alban Girault, Romain Chautard, Françoise Guéraud, Ana J García-Sáez, Mehdi Ouaissi, Patrick Emond, Olivier Sire, Olivier Hérault, Gaëlle Fromont-Hankard, Christophe Vandier, David Tougeron, Mohamed Trebak, William Raoul, Thierry Lecomte
• Journal: Cellular and molecular life sciences : CMLS (Cell Mol Life Sci) Vol. 79 Issue 6 Pg. 284 (May 08 2022) ISSN: 1420-9071 [Electronic] Switzerland
• PMID: 35526196 (Publication Type: Journal Article)
• Copyright: © 2022. The Author(s), under exclusive licence to Springer Nature Switzerland AG.

Chemical References

• Mitochondrial Proteins
• Sodium-Calcium Exchanger
• Curcumin
• Calcium

Topics

• Animals
• Calcium (metabolism)
• Calcium Signaling
• Colorectal Neoplasms (drug therapy, genetics)
• Curcumin (pharmacology)
• Humans
• Mice
• Microsatellite Instability
• Microsatellite Repeats
• Mitochondrial Proteins (metabolism)
• Sodium-Calcium Exchanger (antagonists & inhibitors)