Interaction between fructose and glucose on the regulation of the nuclear precursor for mRNA-S14

Abstract

We have examined the mechanism of the carbohydrate induction of rat hepatic mRNA-S14 to the intragastric administration of sucrose and its consituent hexoses, fructose and glucose. A maximal sucrose response (26-fold) was obtained with 2 ml of 60% sucrose/100 g of body weight, yet equimolar concentrations of fructose and glucose were not able to reproduce the response. Fructose yielded less than one third the response observed with sucrose, whereas glucose administration was ineffective. On the other hand, the simulataneous administration of both hexoses restored the full response observed with sucrose. The synergism between fructose and glucose was not due to the administration of extra cal..