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Defining Conditions for Optimal Inhibition of Food Intake in Rats by a Grape-Seed Derived Proanthocyanidin Extract
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Defining Conditions for Optimal Inhibition of Food Intake in Rats by a Grape-Seed Derived Proanthocyanidin Extract
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Journal Article
Defining Conditions for Optimal Inhibition of Food Intake in Rats by a Grape-Seed Derived Proanthocyanidin Extract
2016
Overview
Food intake depends on homeostatic and non-homeostatic factors. In order to use grape seed proanthocyanidins (GSPE) as food intake limiting agents, it is important to define the key characteristics of their bioactivity within this complex function. We treated rats with acute and chronic treatments of GSPE at different doses to identify the importance of eating patterns and GSPE dose and the mechanistic aspects of GSPE. GSPE-induced food intake inhibition must be reproduced under non-stressful conditions and with a stable and synchronized feeding pattern. A minimum dose of around 350 mg GSPE/kg body weight (BW) is needed. GSPE components act by activating the Glucagon-like peptide-1 (GLP-1) receptor because their effect is blocked by Exendin 9-39. GSPE in turn acts on the hypothalamic center of food intake control probably because of increased GLP-1 production in the intestine. To conclude, GSPE inhibits food intake through GLP-1 signaling, but it needs to be dosed under optimal conditions to exert this effect.
Publisher
MDPI AG,MDPI
Subject
/ Appetite
/ Appetite Regulation - drug effects
/ Dose-Response Relationship, Drug
/ Female
/ Food
/ Glucagon
/ Glucagon-Like Peptide 1 - drug effects
/ Glucagon-Like Peptide-1 Receptor - drug effects
/ Grape Seed Extract - administration & dosage
/ Grape Seed Extract - pharmacology
/ Peptides
/ Proanthocyanidins - administration & dosage
/ Proanthocyanidins - pharmacology
/ Rats
