title: Epidermal growth factor and insulin cause normal chicken heart mesenchymal cells to proliferate like their Rous sarcoma virus-infected counterparts.
abstract: Normal chicken heart mesenchymal cells at low culture density are proliferatively quiescent in a physiological culture medium containing heparinized, heat-inactivated, chicken plasma at 10%. Rous sarcoma virus-infected chicken heart mesenchymal cells, on the other hand, proliferate maximally in this same medium, undergoing a 60-fold increase in cell number during 4 days of exponential growth. When normal heart mesenchymal cells are cultured for 4 days in the presence of epidermal growth factor at 1 micrograms/ml they undergo a 16-fold increase in number, with graded responses to lower concentrations of the factor. In the presence of insulin at 10 micrograms/ml, normal heart mesenchymal cells multiply by a factor of 3 over a 4-day period. The addition of epidermal growth factor (1 microgram/ml) and insulin (10 micrograms/ml) to cultures of normal chicken heart mesenchymal cells causes these cells to proliferate at a rate comparable to that of their RSV-infected counterparts.
mesh_terms: D000818:Animals; D001358:Avian Sarcoma Viruses / Q000254:growth & development*; D002455:Cell Division / Q000187:drug effects; D002478:Cells, Cultured; D002645:Chickens; D003470:Culture Media; D004815:Epidermal Growth Factor / Q000494:pharmacology*; D006321:Heart / Q000382:microbiology; D007328:Insulin / Q000494:pharmacology*; D007700:Kinetics; D009206:Myocardium / Q000166:cytology*
chemical_list: D003470:Culture Media; D007328:Insulin; D004815:Epidermal Growth Factor