Regulation of the expression of follistatin in rat hepatocytes

You Qing Zhang, Makoto Kanzaki, Hiroshi Shibata, Itaru Kojima

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

To elucidate the regulation of follistatin production in the liver, we studied changes in steady-state follistatin mRNA I levels in cultured rat hepatocytes. Activin A stimulated follistatin mRNA levels in a time- and concentration-dependent manner. The stimulatory effect of activin A on follistatin mRNA was significant at 2 h, maximal at 6 h and declined thereafter. Incubating the cells with EGF increased follistatin mRNA levels at 48 h and later. The EGF-induced increase in follistatin mRNA was markedly inhibited by exogenous follistatin in the culture medium, which blocks the action of activin A synthesized in hepatocytes, suggesting that endogenous activin A at least partly mediated the effect of EGF. We also examined the effects of transforming growth factor-β (TGF-β), glucagon and α-adrenergic agonist, phenylephrine, on follistatin mRNA levels. TGF-β increased the follistatin mRNA to levels similar to those caused by activin A. Phenylephrine and glucagon also increased follistatin mRNA levels but the effects were transient and weaker than those caused by activin A. Finally, follistatin mRNA levels were markedly increased in remnant liver 3 h after 70% hepatectomy. The mRNA remained elevated for up to 72 h. These results indicate that the expression of mRNA for follistatin is positively controlled by activin A, TGF-β and other hormones or neurotransmitters. The stimulatory effect of EGF on follistatin mRNA is mediated by activin A released from hepatocytes.

Original languageEnglish
Pages (from-to)204-210
Number of pages7
JournalBiochimica et Biophysica Acta - Gene Structure and Expression
Volume1354
Issue number3
DOIs
Publication statusPublished - 1997 Nov 20
Externally publishedYes

Keywords

  • Activin A
  • Autocrine
  • Follistatin
  • Hepatocyte
  • Messenger RNA

ASJC Scopus subject areas

  • Structural Biology
  • Biophysics
  • Biochemistry
  • Genetics

Fingerprint Dive into the research topics of 'Regulation of the expression of follistatin in rat hepatocytes'. Together they form a unique fingerprint.

  • Cite this