Lysosomal enzyme cathepsin D protects against alpha-synuclein aggregation and toxicity.
Lysosomal enzyme cathepsin D protects against alpha-synuclein aggregation and toxicity.
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DOI:
10.1186/1756-6606-1-17
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发表时间:
2008-11-21
期刊:
影响因子:
3.6
通讯作者:
Zhang J
中科院分区:
文献类型:
--
作者:
Qiao L;Hamamichi S;Caldwell KA;Caldwell GA;Yacoubian TA;Wilson S;Xie ZL;Speake LD;Parks R;Crabtree D;Liang Q;Crimmins S;Schneider L;Uchiyama Y;Iwatsubo T;Zhou Y;Peng L;Lu Y;Standaert DG;Walls KC;Shacka JJ;Roth KA;Zhang J
α-synuclein (α-syn) is a main component of Lewy bodies (LB) that occur in many neurodegenerative diseases, including Parkinson's disease (PD), dementia with LB (DLB) and multi-system atrophy. α-syn mutations or amplifications are responsible for a subset of autosomal dominant familial PD cases, and overexpression causes neurodegeneration and motor disturbances in animals. To investigate mechanisms for α-syn accumulation and toxicity, we studied a mouse model of lysosomal enzyme cathepsin D (CD) deficiency, and found extensive accumulation of endogenous α-syn in neurons without overabundance of α-syn mRNA. In addition to impaired macroautophagy, CD deficiency reduced proteasome activity, suggesting an essential role for lysosomal CD function in regulating multiple proteolytic pathways that are important for α-syn metabolism. Conversely, CD overexpression reduces α-syn aggregation and is neuroprotective against α-syn overexpression-induced cell death in vitro. In a C. elegans model, CD deficiency exacerbates α-syn accumulation while its overexpression is protective against α-syn-induced dopaminergic neurodegeneration. Mutated CD with diminished enzymatic activity or overexpression of cathepsins B (CB) or L (CL) is not protective in the worm model, indicating a unique requirement for enzymatically active CD. Our data identify a conserved CD function in α-syn degradation and identify CD as a novel target for LB disease therapeutics.
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影响因子:
16.2
作者:
Giasson, BI;Duda, JE;Lee, VMY
通讯作者:
Lee, VMY
影响因子:
11.2
作者:
Bove, Jordi;Zhou, Chun;Przedborski, Serge
通讯作者:
Przedborski, Serge
影响因子:
21.3
作者:
Fujiwara, H;Hasegawa, M;Iwatsubo, T
通讯作者:
Iwatsubo, T
影响因子:
4.8
作者:
Hasegawa, M;Fujiwara, H;Iwatsubo, T
通讯作者:
Iwatsubo, T
DOI:
10.1073/pnas.0711018105
发表时间:
2008-01-15
影响因子:
11.1
作者:
Hamamichi, Shusei;Rivas, Renee N.;Caldwell, Guy A.
通讯作者:
Caldwell, Guy A.