Research Project
Grant-in-Aid for Young Scientists (B)
We tested the effect of their overexpression on lifespan and developmental viability in SCA1 Drosophila model expressing ATX1-82Q. We identified genes previously unknown to be involved in CAG-/polyQ-related pathogenesis that function in multiple DNA damage repair systems. Beyond the significance of each repair system, systems biology analyses unraveled the core networks connecting positive genes in the gene screen that could contribute to SCA1 pathology. In particular, RpA1, which had the largest effect on lifespan in the SCA1 fly model, was located at the hub position linked to such core repair systems, including homologous recombination (HR). We revealed that ATXN1 actually interacted with RpA1. Furthermore, mutant but not normal ATXN1 impaired the dynamics of RpA1 in the nucleus after DNA damage. In addition, chemical and genetic inhibitions of Chk1 elongated lifespa. Collectively, we elucidated core networks for DNA damage repair in SCA1 that might include the aberrant usage of HR.
All 2014 2013 2012 Other
All Journal Article (6 results) (of which Peer Reviewed: 5 results, Open Access: 1 results) Presentation (29 results) Remarks (5 results)
Hum Mol Genet
Volume: 23 Issue: 5 Pages: 1345-1364
10.1093/hmg/ddt524
Nat Commun.
Volume: 4 Issue: 1 Pages: 1816-1816
10.1038/ncomms2828
PLOS ONE
Volume: 8 Issue: 7 Pages: e68627-e68627
10.1371/journal.pone.0068627
Neurobiology of Aging
Volume: 34(1)
Nat Communications
Volume: In press
Neurobiol Aging
Volume: Jan;34(1):356.
http://www.tmd.ac.jp/press-release/20130508/
http://www.jst.go.jp/pr/announce/20131031/index.html
http://www.tmd.ac.jp/press-release/20130508/index.html