Insulin stimulation of glucose transport and metabolism in a human Wilms' tumor-derived myoblast-like cell line: modulation of hormone effects by glucose deprivation

Journal of Cellular Physiology
S K LemmonM G Buse


The effects of insulin and glucose on parameters of metabolism were investigated in myoblast-like (MBL) cells, a human myoblast-like cell line derived from a Wilms' tumor. Insulin responses were studied after 4 hr pre-incubation in serum free media, with or without 5 mM glucose. Insulin was added during the last 2 hr. Glucose starvation markedly increased basal glucose transport (measured as 2-deoxyglucose uptake) as well as the net uptake of [14C]glucose and [14C]glucose incorporation into glycogen. Insulin stimulated net glucose uptake and incorporation into glycogen in a dose-dependent manner in glucose-fed and starved cells. These insulin responses were markedly enhanced in glucose-starved cells. Insulin accelerated 2-deoxyglucose transport in glucose-fed cells but did not further stimulate basal glucose transport in glucose-deprived cells. Insulin increased the incorporation of [3H]leucine into protein in glucose-fed or -starved MBL cells equally. The dose of insulin required for half-maximal insulin responses was similar for all parameters studied. Cycloheximide did not prevent the increased basal glucose incorporation in glucose-starved cells, but markedly inhibited the insulin response, while in glucose-fed cells, cyclo...Continue Reading


Oct 1, 1979·Journal of Cellular Physiology·B V HowardP H Bennett
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