Abstract
Calcium ion (Ca2+) is one of the universal second messengers, which acts in a wide range of cellular processes. Results of recent studies indicated that ROS generated by depression leads to loss of endoplasmic reticulum-Ca2+ homeostasis, oxidative stress, and apoptosis. Agomelatine and duloxetine are novel antidepressant and antioxidant drugs and may reduce oxidative stress, apoptosis, and Ca2+ entry through TRPM2 and voltage-gated calcium channels. We tested the effects of agomelatine, duloxetine, and their combination on oxidative stress, Ca2+ influx, mitochondrial depolarization, apoptosis, and caspase values in the PC-12 neuronal cells. PC-12 neuronal cells were exposed in cell culture and exposed to appropriate non-toxic concentrations and incubation times for agomelatine were determined in the neurons by assessing cell viability. Then PC-12 cells were incubated with agomelatine and duloxetine for 24 h. Treatment of cultured PC-12 cells with agomelatine, duloxetine, and their combination results in a protection on apoptosis, caspase-3, caspase-9, mitochondrial membrane depolarization, cytosolic ROS production, glutathione peroxidase, reduced glutathione, and lipid peroxidation, values. Ca2+ entry through non-specific TRPM2 channel blocker (2-APB) and voltage-gated Ca2+ channel blockers (verapamil and diltiazem) was modulated by agomelatine and duloxetine. However, effects of duloxetine on the Ca2+ entry through TRPM2 channels were higher than in agomelatine. Results of current study suggest that the agomelatine and duloxetine are useful against apoptotic cell death and oxidative stress in PC-12 cells, which seem to be dependent on mitochondrial damage and increased levels of intracellular Ca2+ through activation of TRPM2 and voltage-gated Ca2+ channels.
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Abbreviations
- [Ca2+]i :
-
Intracellular Ca2+
- 2-APB:
-
2-Aminoethyl diphenylborinate
- CNS:
-
Central nervous system
- DMSO:
-
Dimethyl sulfoxide
- DTNB:
-
5,5′-Dithiobis-(2-nitrobenzoic acid)
- GSH:
-
Glutathione
- GSH-Px:
-
Glutathione peroxidase
- LP:
-
Lipid peroxidation
- MDD:
-
Major depressive disorder
- NMDG+ :
-
N-Methyl-d-glucamine
- ROS:
-
Reactive oxygen species
- TRP:
-
Transient receptor potential
- TRPM2:
-
Transient receptor potential melastatin
- VGCC:
-
Voltage-gated calcium channel
- H2O2 :
-
Hydrogen peroxide
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There is no financial support for the current study. Special thanks to Stephanie Mayo and Eleni Mae Lazarou for polishing the English.
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Akpinar, A., Uğuz, A.C. & Nazıroğlu, M. Agomelatine and Duloxetine Synergistically Modulates Apoptotic Pathway by Inhibiting Oxidative Stress Triggered Intracellular Calcium Entry in Neuronal PC12 Cells: Role of TRPM2 and Voltage-Gated Calcium Channels. J Membrane Biol 247, 451–459 (2014). https://doi.org/10.1007/s00232-014-9652-1
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DOI: https://doi.org/10.1007/s00232-014-9652-1