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Prevention of intracellular degradation of I2020T mutant LRRK2 restores its protectivity against apoptosis.

Abstract：

:Leucine-rich repeat kinase 2 (LRRK2) is the causal gene for autosomal dominant familial Parkinson's disease. We have previously reported a novel molecular feature characteristic to I2020T mutant LRRK2: higher susceptibility to post-translational degradation than the wild-type LRRK2. In the present study, we demonstrated that the protective effect of I2020T LRRK2 against hydrogen peroxide-induced apoptosis was impaired in comparison with the wild-type molecule. When the intracellular level of the protein had been allowed to recover by treatment with proteolysis inhibitors, the protective effect of I2020T LRRK2 against apoptosis was increased. We further confirmed that a decrease in the intracellular protein level of WT LRRK2 by knocking down resulted in a reduction of protectivity against apoptosis. These results suggest that higher susceptibility of I2020T mutant LRRK2 to intracellular degradation than the wild-type molecule may be one of the mechanisms involved in the neurodegeneration associated with this LRRK2 mutation.

journal_name

Biochem Biophys Res Commun

journal_title

Biochemical and biophysical research communications

authors

Ohta E,Kubo M,Obata F

doi

10.1016/j.bbrc.2009.11.043

subject

Has Abstract

pub_date

2010-01-01 00:00:00

pages

242-7

issue

1

eissn

0006-291X

issn

1090-2104

pii

S0006-291X(09)02217-7

journal_volume

391

pub_type

杂志文章

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