Possible endocrine control by follistatin 315 during liver regeneration based on changes in the activin receptor after a partial hepatectomy in rats

Kazuhito Takamura, Kunihiro Tsuchida, Hidenori Miyake, Seiki Tashiro, Hiromu Sugino

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Background/Aims: Activin A is an autocrine inhibitor of cell growth in the liver. The biological activity of activin A is mediated by a heteromeric receptor complex. Follistatin (FS) binds to activin and inhibits its biological effects, and acts as a negative regulator of muscle cells. The role of activin receptors during liver regeneration following a hepatectomy has not been fully assessed. This study investigates the mechanism underlying how activin receptors regulate hepatocyte growth, and the effects of intravenous administration of FS during liver regeneration. Methodology: The expression of both activins and activin receptors in the liver after a 70% partial hepatectomy (HT) was assessed by RT-PCR and immunohistochemistry. FS 315 or 288 was infused for different periods of time based on changes in hepatocyte activin receptor expression after HT. Results: Activin receptor expression peaked between 48 and 72 hours after HT. 72 hours after HT, an injection of FS 315 resulted in a more potent stimulation of DNA synthesis and produced a greater increase in body weight compared with the control rats. Conclusions: The expression of activin receptors after peak DNA synthesis might be a key component in the downregulation of DNA synthesis. Intravenous administration of FS 315 might promote liver regeneration and have anabolic actions.

Original languageEnglish
Pages (from-to)60-66
Number of pages7
JournalHepato-gastroenterology
Volume52
Issue number61
Publication statusPublished - 01-01-2005
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Hepatology
  • Gastroenterology

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