Abstract:
:Dysregulation of Fused in Sarcoma (FUS) gene expression is associated with fronto-temporal lobar degeneration (FTLD), and missense mutations in the FUS gene have been identified in patients affected by amyotrophic lateral sclerosis (ALS). However, molecular and cellular defects underlying FUS proteinopathy remain to be elucidated. Here, we examined whether genes important for mitochondrial quality control play a role in FUS proteinopathy. In our genetic screening, Pink1 and Park genes were identified as modifiers of neurodegeneration phenotypes induced by wild type (Wt) or ALS-associated P525L-mutant human FUS. Down-regulating expression of either Pink1 or Parkin genes ameliorated FUS-induced neurodegeneration phenotypes. The protein levels of PINK1 and Parkin were elevated in cells overexpressing FUS. Remarkably, ubiquitinylation of Miro1 protein, a downstream target of the E3 ligase activity of Parkin, was also increased in cells overexpressing FUS protein. In fly motor neurons expressing FUS, both motility and processivity of mitochondrial axonal transport were reduced by expression of either Wt- or P525L-mutant FUS. Finally, down-regulating PINK1 or Parkin partially rescued the locomotive defects and enhanced the survival rate in transgenic flies expressing FUS. Our data indicate that PINK1 and Parkin play an important role in FUS-induced neurodegeneration. This study has uncovered a previously unknown link between FUS proteinopathy and PINK1/Parkin genes, providing new insights into the pathogenesis of FUS proteinopathy.
journal_name
Hum Mol Genetjournal_title
Human molecular geneticsauthors
Chen Y,Deng J,Wang P,Yang M,Chen X,Zhu L,Liu J,Lu B,Shen Y,Fushimi K,Xu Q,Wu JYdoi
10.1093/hmg/ddw310subject
Has Abstractpub_date
2016-12-01 00:00:00pages
5059-5068issue
23eissn
0964-6906issn
1460-2083pii
ddw310journal_volume
25pub_type
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