Establishment of tetracycline-inducible gene expression systems in the silkworm, Bombyx mori

Noriko Karasaki, Hiroaki Mon, Masateru Takahashi, Jae Man Lee, Katsumi Koga, Yutaka Kawaguchi, Takahiro Kusakabe*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


Tetracycline-inducible gene expression (Tet-on) system has become one of the first choices for the control of transgenes expression in mammal and drosophila. However, the Tet-on systems that have been established in mammalian system or tuned into drosophila do not function in the silkworm, Bombyx mori. To construct a functional Tet-on system in B. mori, we modified rtTA by introducing a transcription activation domain of immediate-early gene 1 of Autographa californica nuclear polyhedrosis virus and nuclear localization signal of SV40 large T-antigen. The modified rtTA can activate the transcription from 9 × tetO promoter in the silkworm cells up to 250-fold in the presence of doxycycline.

Original languageEnglish (US)
Pages (from-to)495-500
Number of pages6
JournalBiotechnology Letters
Issue number4
StatePublished - Apr 2009


  • Bombyx mori
  • Doxycycline
  • RtTA
  • Tet-on system
  • TetO

ASJC Scopus subject areas

  • Applied Microbiology and Biotechnology
  • Bioengineering
  • Biotechnology


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