Endocytosis regulates TDP-43 toxicity and turnover.
Endocytosis regulates TDP-43 toxicity and turnover.
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DOI:
10.1038/s41467-017-02017-x
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发表时间:
2017-12-12
影响因子:
16.6
通讯作者:
Buchan JR
中科院分区:
文献类型:
--
作者:
Liu G;Coyne AN;Pei F;Vaughan S;Chaung M;Zarnescu DC;Buchan JR
Amyotrophic lateral sclerosis (ALS) is a fatal motor neuron degenerative disease. ALS-affected motor neurons exhibit aberrant localization of a nuclear RNA binding protein, TDP-43, into cytoplasmic aggregates, which contributes to pathology via unclear mechanisms. Here, we demonstrate that TDP-43 turnover and toxicity depend in part upon the endocytosis pathway. TDP-43 inhibits endocytosis, and co-localizes strongly with endocytic proteins, including in ALS patient tissue. Impairing endocytosis increases TDP-43 toxicity, aggregation, and protein levels, whereas enhancing endocytosis reverses these phenotypes. Locomotor dysfunction in a TDP-43 ALS fly model is also exacerbated and suppressed by impairment and enhancement of endocytic function, respectively. Thus, endocytosis dysfunction may be an underlying cause of ALS pathology. Impaired turnover of TDP-43 by impaired autophagy or proteasomal function have been suggested to be the cause of TDP-43 accumulation, a hallmark of ALS. Here the authors demonstrate that endocytosis is also important for regulating TDP-43 turnover and toxicity.
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10.1073/pnas.1202922109
发表时间:
2012-04-10
影响因子:
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通讯作者:
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