Author:
Yan Haomin,Sasaki Tsutomu,Kanki Hideaki,Hirata Yoshiyuki,Nishiyama Kumiko,Hisada Sunao,Matsumura Shigenobu,Nagaoka Yasuo,Sumiyoshi Takaaki,Nagano Seiichi,Nakata Akiko,Yoshida Minoru,Uesato Shinichi,Mochizuki Hideki
Abstract
AbstractMdmx and Mdm2 are two major suppressor factors for the tumor suppressor gene p53. In central nervous system, Mdmx suppresses the transcriptional activity of p53 and enhances the binding of Mdm2 to p53 for degradation. But Mdmx dynamics in cerebral infarction remained obscure. Here we investigated the role of Mdmx under ischemic conditions and evaluated the effects of our developed small-molecule Protein–Protein Interaction (PPI) inhibitors, K-181, on Mdmx–p53 interactions in vivo and in vitro. We found ischemic stroke decreased Mdmx expression with increased phosphorylation of Mdmx Serine 367, while Mdmx overexpression by AAV-Mdmx showed a neuroprotective effect on neurons. The PPI inhibitor, K-181 attenuated the neurological deficits by increasing Mdmx expression in post-stroke mice brain. Additionally, K-181 selectively inhibited HDAC6 activity and enhanced tubulin acetylation. Our findings clarified the dynamics of Mdmx in cerebral ischemia and provide a clue for the future pharmaceutic development of ischemic stroke.
Funder
Japan Society for the Promotion of Science
Smoking Research Foundation
Japan Agency for Medical Research and Development
Publisher
Springer Science and Business Media LLC
Cited by
2 articles.
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