Quinotrierixin inhibited ER stress-induced XBPl mRNA splicing through inhibition of protein synthesis

Kohta Yamamoto, Etsu Tashiro, Masaya Imoto

Research output: Contribution to journalArticle

10 Citations (Scopus)


Quinotrierixin was isolated from microbes as an inhibitor of ER stress-induced XBPl mRNA splicing, but its mode of action was unclear. We found that quinotrierixin is an inhibitor of protein synthesis, and that the required dose range of quinotrierixin to inhibit ER stress-induced XBPl mRNA splicing was similar to that to inhibit protein synthesis. Furthermore, we also found that quinotrierixin inhibited the ER stress-induced increases of unfolded protein response-related genes such as GRP78, CHOP, EDEM, ERdj4, and p58IPK. Thus, we showed that quinotrierixin inhibited the ER stress-induced unfolded protein response, possibly due to its inhibitory activity of protein synthesis.

Original languageEnglish
Pages (from-to)284-288
Number of pages5
JournalBioscience, Biotechnology and Biochemistry
Issue number2
Publication statusPublished - 2011 Mar 7



  • ER stress
  • Protein synthesis inhibitor
  • Quinotrierixin
  • XBPl

ASJC Scopus subject areas

  • Biotechnology
  • Analytical Chemistry
  • Biochemistry
  • Applied Microbiology and Biotechnology
  • Molecular Biology
  • Organic Chemistry

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