Proliferation of fetal rat hepatocytes in response to growth factors and hormones in primary culture.
Fetal rat hepatocytes (day 19 of gestation) multiply in primary culture in arginine-free, hydrocortisone-containing chemically defined medium MX-82 supplemented either with epidermal growth factor (EGF) or insulin or both. In contrast, hepatocytes did not multiply under similar culture conditions using Dulbecco's minimum essential medium (DMEM). Cells underwent two divisions within 10 days in cultures maintained in MX-82 medium without a medium change, and cells grew to increased final cell densities when the medium was renewed every third day. When the medium MX-82 was enriched by the addition of lipids, intermediary metabolites, and trace metals (medium MX-83), cells grew to higher densities. In the absence of the growth factors, cells became quiescent and subsequently could be induced to synthesize DNA in response to EGF. With the increasing numbers of cells per dish, the growth response of the hepatocytes diminished. Levels of hepatocyte-specific albumin and alpha-fetoprotein mRNAs at day 0 were similar to those observed at day 10 in primary fetal rat hepatocyte cultures and were maintained at higher levels in medium MX-83 than in medium MX-82.
Hoffmann
B
B
Department of Toxicology, Hamburg University Medical School, Federal Republic of Germany.
Piasecki
A
A
Paul
D
D
D000818:Animals; D002455:Cell Division; D002469:Cell Separation; D002478:Cells, Cultured; D003470:Culture Media; D046508:Culture Techniques / Q000379:methods; D004247:DNA / Q000096:biosynthesis; D004261:DNA Replication; D004815:Epidermal Growth Factor / Q000494:pharmacology*; D005333:Fetus; D007328:Insulin / Q000494:pharmacology*; D008099:Liver / Q000166:cytology* / Q000187:drug effects; D012313:RNA / Q000235:genetics / Q000302:isolation & purification; D051381:Rats; D011919:Rats, Inbred Strains; D012709:Serum Albumin / Q000096:biosynthesis; D000509:alpha-Fetoproteins / Q000096:biosynthesis
D003470:Culture Media; D007328:Insulin; D012709:Serum Albumin; D000509:alpha-Fetoproteins; D004815:Epidermal Growth Factor; D012313:RNA; D004247:DNA