title: The cell proliferation kinetics of the EMT6/M/AC mouse tumour at four volumes during unperturbed growth in vivo.
abstract: The cell proliferation kinetics of the EMT6/M/AC mouse tumour were determined at four different volumes between 1-5 mm3 and 175 mm3. The decrease in the growth rate between these volumes are mainly due to a decrease in the rate constant for cell production. A small increase in the rate constant for cell loss occurred, but this was thought to be insignificant. The cell loss factor increased from 40% at 1-5 mm3 to over 70% in the 175 mm3 tumours. An increase in the median cell cycle time, from 14-1 hr to 18-5 hr was also found between these same volumes. Results obtained for the NCTC fibrosarcoma and the R-1 rhabdo-myosarcoms indicate that there may be a threshold volume in these sarcomas below which little or no cell loss takes place. This was not found in the EMT6/M/AC tumour.
mesh_terms: D000818:Animals; D001345:Autoradiography; D002455:Cell Division; D007700:Kinetics; D008297:Male; D008433:Mathematics; D051379:Mice; D008807:Mice, Inbred BALB C; D008940:Mitotic Index; D009374:Neoplasms, Experimental / Q000473:pathology*; D013936:Thymidine
chemical_list: D013936:Thymidine