Comparative study on anorexigenic effect of glucagon-like peptide-1 receptor agonists in rats / 生理学报
Acta Physiologica Sinica
;
(6): 514-526, 2019.
Article
in English
| WPRIM
| ID: wpr-777160
ABSTRACT
Glucagon-like peptide-1 (GLP-1) expression is shared by both intestinal cells and neurons of brainstem, which plays anorexigenic role on food intake. However, the exact source of physiological GLP-1 influencing food intake and pertinent mechanism of GLP-1 receptor agonists (GLP-1RA) remain unelucidated. In this study, the immediate early gene product c-Fos was chosen as the specific antigen for immunohistochemistry to show the certain areas of central nervous system (CNS) activation by the GLP-1RA. Thirty normal SD rats were randomly assigned to 3 groups, which were single intraperitoneally injected with Liraglutide (200 μg/kg), Exenatide (10 μg/kg) and saline, respectively. After injection, the amount of food intake and acute glycemic variation were assessed for comparison. The results showed that acute pharmacological dosage of GLP-1RA (Liraglutide or Exenatide) could significantly influence food intake. However, glycemic change indicated that the anorexic effect was dissociated with change in blood glucose in normal rats. Moreover, c-Fos was expressed significantly higher in major critical nuclei related to food intake in GLP-1RA groups when compared with the control group, and its expression was also found in spinal cord. The results suggested that acute administration of pharmacological doses of GLP-1 influences CNS via circulation and vagal pathways, especially on the arcuate nucleus (ARC) and the nucleus of solitary tract (NTS), and GLP-1 modulates autonomic nervous activities.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Pharmacology
/
Random Allocation
/
Rats, Sprague-Dawley
/
Eating
/
Liraglutide
/
Glucagon-Like Peptide-1 Receptor
/
Exenatide
Limits:
Animals
Language:
English
Journal:
Acta Physiologica Sinica
Year:
2019
Type:
Article
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