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Low-Intensity Ultrasound Decreases α-Synuclein Aggregation via Attenuation of Mitochondrial Reactive Oxygen Species in MPP(+)-Treated PC12 Cells.

Abstract：

:Many studies have shown that mitochondrial dysfunction and the subsequent oxidative stress caused by excessive reactive oxygen species (ROS) generation play a central role in the pathogenesis of Parkinson's disease (PD). We have previously shown that low-intensity ultrasound (LIUS) could reduce ROS generation by L-buthionine-(S,R)-sulfoximine (BSO) in retinal pigment epithelial cells. In this study, we studied the effects of LIUS stimulation on the ROS-dependent α-synuclein aggregation in 1-methyl-4-phenylpyridinium ion (MPP+)-treated PC12 cells. We found that LIUS stimulation suppressed the MPP+-induced ROS generation and inhibition of mitochondrial complex I activity in PC12 cells in an intensity-dependent manner at 30, 50, and 100 mW/cm2. Furthermore, LIUS stimulation at 100 mW/cm2 suppressed inhibition of mitochondrial complex activity by MPP+ and actually resulted in a decrease of α-synuclein phosphorylation and aggregation induced by MMP+ treatment in PC12 cells. LIUS stimulation also inhibited expression of casein kinase 2 (CK2) that appears to mediate ROS-dependent α-synuclein aggregation. Finally, LIUS stimulation alleviated the death of PC12 cells by MPP+ treatment in an intensity-dependent manner. We, hence, suggest that LIUS stimulation inhibits ROS generation by MPP+ treatment, thereby suppressing α-synuclein aggregation in PC12 cells.

journal_name

Mol Neurobiol

journal_title

Molecular neurobiology

authors

Karmacharya MB,Hada B,Park SR,Choi BH

doi

10.1007/s12035-016-0104-z

subject

Has Abstract

pub_date

2017-10-01 00:00:00

pages

6235-6244

issue

8

eissn

0893-7648

issn

1559-1182

pii

10.1007/s12035-016-0104-z

journal_volume

54

pub_type

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