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Leptin and glucagon-like peptide-1 (GLP-1) were proved to act in concert to control the activity of feeding centres. Since leptin receptor was identified in the gut endocrine L cells and neurons producing GLP-1, we have checked whether GLP-1 mediates the effects of leptin on feeding and drinking behaviour. To this aim, an intraperitoneal or intracerebroventricular injection of exendin (9 - 39), a...
Leptin interplays with other peptides to control feeding behaviour in humans and animals. Using exendin-4, an agonist of glucagon-like peptide-1, we investigated whether leptin modifies its effect on food intake in the rat. In the first series, exendin-4 alone (0.1, 2 or 10 µg per rat), leptin alone (0.1, 2, 10 or 100 µg per rat) or exendin-4 and leptin together (0.1 + 0.1, 2 + 2, 10 + 10, or 2 +...
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