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Cells 2019, 8(1), 28; https://doi.org/10.3390/cells8010028

Increasing the TRPM2 Channel Expression in Human Neuroblastoma SH-SY5Y Cells Augments the Susceptibility to ROS-Induced Cell Death

1
Sino-UK Joint Laboratory for Brain Function and Injury and Department of Physiology and Neurobiology, Xinxiang Medical University, Xinxiang 453003, China
2
School of Biomedical Sciences, Faculty of Biological Sciences, University of Leeds, Leeds LS2 JT, UK
*
Authors to whom correspondence should be addressed.
Received: 13 November 2018 / Revised: 22 December 2018 / Accepted: 30 December 2018 / Published: 8 January 2019
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Abstract

Human neuroblastoma SH-SY5Y cells are a widely-used human neuronal cell model in the study of neurodegeneration. A recent study shows that, 1-methyl-4-phenylpyridine ion (MPP), which selectively causes dopaminergic neuronal death leading to Parkinson’s disease-like symptoms, can reduce SH-SY5Y cell viability by inducing H2O2 generation and subsequent TRPM2 channel activation. MPP-induced cell death is enhanced by increasing the TRPM2 expression. By contrast, increasing the TRPM2 expression has also been reported to support SH-SY5Y cell survival after exposure to H2O2, leading to the suggestion of a protective role for the TRPM2 channel. To clarify the role of reactive oxygen species (ROS)-induced TRPM2 channel activation in SH-SY5Y cells, we generated a stable SH-SY5Y cell line overexpressing the human TRPM2 channel and examined cell death and cell viability after exposure to H2O2 in the wild-type and TRPM2-overexpressing SH-SY5Y cells. Exposure to H2O2 resulted in concentration-dependent cell death and reduction in cell viability in both cell types. TRPM2 overexpression remarkably augmented H2O2-induced cell death and reduction in cell viability. Furthermore, H2O2-induced cell death in both the wild-type and TRPM2-overexpressing cells was prevented by 2-APB, a TRPM2 inhibitor, and also by PJ34 and DPQ, poly(ADP-ribose) polymerase (PARP) inhibitors. Collectively, our results show that increasing the TRPM2 expression renders SH-SY5Y cells to be more susceptible to ROS-induced cell death and reinforce the notion that the TRPM2 channel plays a critical role in conferring ROS-induced cell death. It is anticipated that SH-SY5Y cells can be useful for better understanding the molecular and signaling mechanisms for ROS-induced TRPM2-mediated neurodegeneration in the pathogenesis of neurodegenerative diseases. View Full-Text
Keywords: human neuroblastoma SH-SY5Y cells; TRPM2 channel; ROS; neuronal cell death human neuroblastoma SH-SY5Y cells; TRPM2 channel; ROS; neuronal cell death
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An, X.; Fu, Z.; Mai, C.; Wang, W.; Wei, L.; Li, D.; Li, C.; Jiang, L.-H. Increasing the TRPM2 Channel Expression in Human Neuroblastoma SH-SY5Y Cells Augments the Susceptibility to ROS-Induced Cell Death. Cells 2019, 8, 28.

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