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Updated: Oct 10, 2026

A General Method for Evaluating Incubation of Sucrose Craving in Rats
Published on: November 4, 2011
Insulin and raclopride combine to decrease short-term intake of sucrose solutions
A J Sipols1, G D Stuber, S N Klein
1Institute of Experimental and Clinical Medicine, Faculty of Medicine, University of Latvia, Riga, Latvia.
Abstract:
We have previously reported that the hormone insulin can modulate synaptic function of dopamine neurons. To evaluate whether insulin can alter performance of a task which is dependent on intact dopaminergic signaling, we tested rats in a five minute lick rate task, with a range of concentrations of sucrose or oil solutions. Rats received either ip (t -15 min) saline or the D2 receptor antagonist raclopride (50 microg/kg), and intraventricular (t -4 h) saline or insulin (5 mU). Although ineffective on its own, insulin combined with raclopride treatment resulted in significant suppression of sucrose lick rates compared to the saline/saline group. The overall results are consistent with our hypothesis that insulin may modify performance in tasks that are dependent on dopaminergic signaling.
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