Capsaicin induces apoptosis in PC12 cells through ER stress

Krizanova,Olga; Steliarova,Iveta; Csaderova,Lucia; Pastorek,Michal; Hudecova,Sona

doi:10.3892/or.2013.2921

Capsaicin induces apoptosis in PC12 cells through ER stress

Authors:
- Olga Krizanova
- Iveta Steliarova
- Lucia Csaderova
- Michal Pastorek
- Sona Hudecova
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Affiliations: Institute of Molecular Physiology and Genetics, Slovak Academy of Sciences, 833 34 Bratislava, Slovak Republic, Molecular Medicine Center, Slovak Academy of Sciences, 831 01 Bratislava, Slovak Republic, Cancer Research Institute, Slovak Academy of Sciences, 833 91 Bratislava, Slovak Republic
Published online on: December 13, 2013 https://doi.org/10.3892/or.2013.2921
Pages: 581-588
Copyright: © Krizanova et al. This is an open access article distributed under the terms of Creative Commons Attribution License [CC BY_NC 3.0].

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Abstract

Capsaicin, the pungent agent in chili peppers, has been shown to act as a tumor-suppressor in cancer. In our previous study, capsaicin was shown to induce apoptosis in the rat pheochromocytoma cell line (PC12 cells). Thus, the aim of the present study was to determine the potential mechanism by which capsaicin induces apoptosis. We treated PC12 cells with 50, 100 and 500 µM capsaicin and measured the reticular calcium content and expression of the reticular calcium transport systems. These results were correlated with endoplasmic reticulum (ER) stress markers CHOP, ATF4 and X-box binding protein 1 (XBP1), as well as with apoptosis induction. We observed that capsaicin decreased reticular calcium in a concentration-dependent manner. Simultaneously, expression levels of the sarco/endoplasmic reticulum pump and ryanodin receptor of type 2 were modified. These changes were accompanied by increased ER stress, as documented by increased stress markers. Thus, from these results we propose that in PC12 cells capsaicin induces apoptosis through increased ER stress.

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