5 years ago

Dose-dependent biphasic effects of phenobarbital on growth and differentiation of primary culture rat hepatocytes.

Michalopoulos, Mars, Namba, Miyazaki
The actions of phenobarbital, a liver tumour promoter, on growth and differentiation of primary culture normal rat hepatocytes change biphasically as a function of its concentration. At low concentrations of 0.5-2 mmol/L, phenobarbital enhances DNA synthesis of normal adult rat hepatocytes in the presence of epidermal growth factor (EGF) and/or dexamethasone. This is also true for normal suckling (1-2-week-old) rat hepatocytes, without added growth factor(s), in serum-free primary culture. Contrarily, phenobarbital at high concentrations (3-4 mmol/L) suppresses DNA synthesis of suckling rat hepatocytes. Furthermore, phenobarbital inhibits DNA synthesis of transforming growth factor-a-stimulated primary hepatocytes from normal adult rats in a dose-dependent manner within a concentration range of 3-6 mmol/L. When normal adult rat hepatocytes are led to undergo multiple proliferative cycles upon stimulation with hepatocyte growth factor (HGF) and EGF in the chemically defined hepatocyte growth medium (HGM), 3 mmol/L phenobarbital also remarkably suppresses DNA synthesis. Phenobarbital at 3 mmol/L effectively keeps these hepatocytes morphologically differentiated and accelerates restoration of the expression of markers characteristic of differentiated cells after the initial cellular growth phase. In addition, phenobarbital efficiently supports prolonged survival of the hepatocytes.

Publisher URL: http://doi.org/10.1111/jgh.1998.13.s1.78

DOI: 10.1111/jgh.1998.13.s1.78

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.