Expression and distribution of fugu TIMP-2s (fgTIMP-2a and fgTIMP-2b) mRNAs in tissues and embryos

Hiroshi Tsukamoto, Yoshihiro Yokoyama, Tohru Suzuki, Shoshi Mizuta, Reiji Yoshinaka

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9 Citations (Scopus)


In teleosts, two distinct types of TIMP-2s occur, TIMP-2a and TIMP-2b, but little is known about their locations and quantitative expressions. Here, we examined pufferfish (Takifugu rubripes) TIMP-2a (fgTIMP-2a) and TIMP-2b (fgTIMP-2b) quantities and locations in fugu adult tissues and embryos. To compare the quantitative expression of fgTIMP-2s, we performed a quantitative real-time PCR (qPCR). FgTIMP-2a mRNA was constitutively expressed and significant differences in expression were not observed among adult tissues. Whereas, fgTIMP-2b mRNA was significantly differently expressed in ordinary muscle and gill compared to the expression level in whole blood (P < 0.05). Although significant difference was not observed between brain and other tissues, both fgTIMP-2s mRNAs were abundant in the brain. In addition, we examined embryos during development using qPCR. Both fgTIMP-2s mRNAs gradually increased during embryonic development from 48 hpf. However, fgTIMP-2b mRNA was obviously abundant compared to fgTIMP-2a mRNA in embryos. We also examined the specific mRNA distribution in embryos. The fgTIMP-2s mRNAs showed the same distribution during development. Both fgTIMP-2s are expressed in adult fugu tissues and embryos but their expression levels clearly differ, suggesting that there is a predominance of fgTIMP-2b over fgTIMP-2a in vivo.

Original languageEnglish
Pages (from-to)225-230
Number of pages6
JournalComparative Biochemistry and Physiology - B Biochemistry and Molecular Biology
Issue number3
Publication statusPublished - 2007 Nov
Externally publishedYes


  • Embryo
  • Fugu
  • Quantitative real-time PCR
  • TIMP-2b
  • Takifugu rubripes
  • Teleost
  • Tissue inhibitor of metalloproteinase (TIMP)-2a
  • Whole mount in situ hybridization

ASJC Scopus subject areas

  • Biochemistry
  • Physiology
  • Molecular Biology


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