Melatonin Receptor Agonist Piromelatine Ameliorates Impaired Glucose Metabolism in Chronically Stressed Rats Fed a High-Fat Diet
| Autor: | Xu Jia, RuXue Zhang, Jun Zhou, Mao-xing Li, Moshe Laudon, Deng Wang, XiaoHong Luo, Zheng-ping Jia |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Blood Glucose
Male medicine.medical_specialty Indoles Receptors Melatonin 030209 endocrinology & metabolism Carbohydrate metabolism Biology Diet High-Fat Melatonin 03 medical and health sciences 0302 clinical medicine Insulin resistance Internal medicine medicine Animals Glucose homeostasis Chronic stress Rats Wistar Melatonin receptor agonist Pyrans Pharmacology Piromelatine Lipid metabolism medicine.disease Rats Glucose Endocrinology Chronic Disease Molecular Medicine Stress Psychological 030217 neurology & neurosurgery medicine.drug |
| Zdroj: | Journal of Pharmacology and Experimental Therapeutics. 364:55-69 |
| ISSN: | 1521-0103 0022-3565 |
| DOI: | 10.1124/jpet.117.243998 |
| Popis: | Modern lifestyle factors (high-caloric food rich in fat) and daily chronic stress are important risk factors for metabolic disturbances. Increased hypothalamic-pituitary-adrenal (HPA) axis activity and the subsequent excess production of glucocorticoids (GCs) in response to chronic stress (CS) leads to increases in metabolic complications, such as type 2 diabetes and insulin resistance (IR). Melatonin (MLT), which protects several regulatory components of the HPA axis from GC-induced deterioration, might improve glucose homeostasis. Piromelatine is a melatonin receptor-1/melatonin receptor-2 (MT1/MT2) agonist with high affinity for MLT receptors and a longer duration of action than MLT. The objective of the present study was to explore the potential effects of piromelatine on glucose and lipid metabolism and insulin sensitivity in rats with IR induced by a high-fat diet combined with CS (CF). The results showed that piromelatine prevented the suppression of body weight gain and energy intake induced by CF and normalized CF-induced hyperglycemia and homeostasis model assessment-IR index, which suggests that piromelatine prevented whole-body IR. Piromelatine also prevented CF-induced dysregulation of genes involved in glucose and lipid metabolism, including proinflammatory cytokines, in adipose tissue. In addition, piromelatine also attenuated CF-induced excess free corticosterone release, increased glucocorticoid receptor expression, and decreased 11β-hydroxysteroid dehydrogenase-1 expression, suggesting that piromelatine might ameliorate impaired glucose metabolism and prevent IR by normalizing HPA-axis functions. In conclusion, piromelatine might be a novel therapeutic agent for glucose intolerance and IR. |
| Databáze: | OpenAIRE |
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