Evidence that activation of nuclear peroxisome proliferator-activated receptor alpha (PPARα) modulates sleep homeostasis in rats
Autor: | Ramsés Jiménez-Moreno, Oscar Arias-Carrión, Eric Murillo-Rodríguez, Khalil Guzmán, Mireille Salas-Crisóstomo, Gloria Arankowsky-Sandoval |
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Rok vydání: | 2016 |
Předmět: |
0301 basic medicine
Male medicine.medical_specialty Adenosine Indoles Alpha (ethology) Oleic Acids Biology 03 medical and health sciences Oleoylethanolamide chemistry.chemical_compound 0302 clinical medicine Neurochemical Dopamine Internal medicine medicine Animals Homeostasis Biogenic Monoamines PPAR alpha Rats Wistar Wakefulness Receptor 5-HT receptor Dose-Response Relationship Drug General Neuroscience Brain Wakefulness-Promoting Agents Sleep deprivation 030104 developmental biology Endocrinology Pyrimidines chemistry Sleep Deprivation Peroxisome Proliferators Peroxisome proliferator-activated receptor alpha medicine.symptom Sleep 030217 neurology & neurosurgery medicine.drug Endocannabinoids |
Zdroj: | Brain research bulletin. 127 |
ISSN: | 1873-2747 |
Popis: | The peroxisome proliferator-activated receptor alpha (PPARα) is a member of the nuclear receptor superfamily that has been suggested as a modulator of several physiological functions. The PPARα recognizes as an endogenous ligand the anorexic lipid mediator oleoylethanolamide (OEA) which displays wake-inducing properties. Despite that recent evidence indicates that activation of PPARα by synthetic agonists such as Wy14643 enhances waking as well as the extracellular contents of wake-related neurotransmitters, the role of PPARα in sleep recovery after prolonged waking has not been fully described. Thus, the aim of this study was to characterize if PPARα regulates sleep rebound after total sleep deprivation (TSD). We report that after 6 h of TSD activation of PPARα by pharmacological systemic administration of OEA (10, 20 or 30 mg/Kg, i.p.) promoted alertness by blocking the sleep rebound after TSD. Besides, wake-linked compounds such as dopamine, norepinephrine, serotonin, or adenosine collected from nucleus accumbens were enhanced after TSD in OEA-treated animals. These sleep and neurochemical results were mimicked after injection of PPARα agonist Wy14643 (10, 20, 30 mg/Kg, i.p.). However, similar findings from the sham of vehicle groups were observed if PPARα antagonist MK-886 was administered to rats (10, 20, 30 mg/Kg, i.p.). Our results strengthened the hypothesis that PPARα might modulate sleep and neurochemical homeostasis after sleep deprivation. |
Databáze: | OpenAIRE |
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