IMR Press / FBE / Volume 4 / Issue 7 / DOI: 10.2741/E548

Frontiers in Bioscience-Elite (FBE) is published by IMR Press from Volume 13 Issue 2 (2021). Previous articles were published by another publisher on a subscription basis, and they are hosted by IMR Press on imrpress.com as a courtesy and upon agreement with Frontiers in Bioscience.

Open Access Article

GSTP1, a novel downstream regulator of LRRK2, G2019S-induced neuronal cell death

Show Less
1 State Key Laboratory of Medical Neurobiology and Institute of Brain Sciences, Fudan University School of Medicine, Shanghai, China, 200032
2 Department of Neurology and Pittsburgh Institute of Neurodegenerative Diseases, University of Pittsburgh, Pittsburgh, PA 15261
3 Geriatric Research, Educational and Clinical Center, Veterans Affairs Pittsburgh Health Care System, Pittsburgh, PA 15213

*Author to whom correspondence should be addressed.

Academic Editor: Feng Zhang

Front. Biosci. (Elite Ed) 2012, 4(7), 2365–2377; https://doi.org/10.2741/E548
Published: 1 June 2012
Abstract

The enhanced neurotoxicity of the Parkinson’s disease-associated LRRK2 mutant, G2019S, than its wildtype counter-part has recently been reported. Overexpression of LRRK2 (G2019S) in cultured neural cells results in caspase-3-dependent apoptosis via a yet undefined signaling pathway. Elucidation of the mechanism underlying LRRK2 (G2019S) neurotoxicity may offer new insights into the pathogenesis of Parkinson’s disease. In this study, we identified glutathione stransferase P1 (GSTP1) as a selective target whose expression is negatively regulated at the transcriptional levels via promoter hyper-methylation by LRRK2 (G2019S). Overexpression of LRRK2 (G2019S) in the human neuronal cell line SH-SY5Y markedly suppressed the expression of GSTP1 prior to any manifestation of cell death. Moreover, shRNA-mediated knockdown of endogenous GSTP1 expression exacerbated LRRK2 (G2019S) neurotoxicity, whereas overexpression of GSTP1 protected against LRRK2 (G2019S)-induced caspase-3 activation and neuronal apoptosis. In conclusion, the results suggest a previously undefined signaling mechanism underlying the neurotoxic effect of LRRK2 (G2019S), in which LRRK2 (G2019S) triggers oxidative stress in cells and, in turn, results in caspasedependent apoptosis at least in part by suppressing the expression of GSTP1.

Keywords
LRRK2. G2019S
GSTP1
Apoptosis
Parkinson
Share
Back to top