Altered Tau Isoform Ratio Caused by Loss of FUS and SFPQ Function Leads to FTLD-like Phenotypes

  • Shinsuke Ishigaki
  • , Yusuke Fujioka
  • , Yohei Okada
  • , Yuichi Riku
  • , Tsuyoshi Udagawa
  • , Daiyu Honda
  • , Satoshi Yokoi
  • , Kuniyuki Endo
  • , Kensuke Ikenaka
  • , Shinnosuke Takagi
  • , Yohei Iguchi
  • , Naruhiko Sahara
  • , Akihiko Takashima
  • , Hideyuki Okano
  • , Mari Yoshida
  • , Hitoshi Warita
  • , Masashi Aoki
  • , Hirohisa Watanabe
  • , Haruo Okado
  • , Masahisa Katsuno
  • Gen Sobue

Research output: Contribution to journalArticlepeer-review

88 Citations (Scopus)

Abstract

Fused in sarcoma (FUS) and splicing factor, proline- and glutamine-rich (SFPQ) are RNA binding proteins that regulate RNA metabolism. We found that alternative splicing of the Mapt gene at exon 10, which generates 4-repeat tau (4R-T) and 3-repeat tau (3R-T), is regulated by interactions between FUS and SFPQ in the nuclei of neurons. Hippocampus-specific FUS- or SFPQ-knockdown mice exhibit frontotemporal lobar degeneration (FTLD)-like behaviors, reduced adult neurogenesis, accumulation of phosphorylated tau, and hippocampal atrophy with neuronal loss through an increased 4R-T/3R-T ratio. Normalization of this increased ratio by 4R-T-specific silencing results in recovery of the normal phenotype. These findings suggest a biological link among FUS/SFPQ, tau isoform alteration, and phenotypic expression, which may function in the early pathomechanism of FTLD.

Original languageEnglish
Pages (from-to)1118-1131
Number of pages14
JournalCell Reports
Volume18
Issue number5
DOIs
Publication statusPublished - 31-01-2017
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Biochemistry,Genetics and Molecular Biology

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