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Effects of prostaglandin D2, lipoxins and leukotrienes on sleep and brain temperature of rats
Effects of prostaglandin D2, lipoxins and leukotrienes on sleep and brain temperature of rats
- Source :
- Prostaglandins, Leukotrienes and Essential Fatty Acids. 51:87-93
- Publication Year :
- 1994
- Publisher :
- Elsevier BV, 1994.
-
Abstract
- Prostaglandin (PG) D2 and four lipoxygenase-derived eicosanoids [lipoxins (LX) A4 and B4, and leukotrienes (LT) C4 and D4] were examined for their effects on sleep and brain temperature in freely-behaving rats. In the first series of experiments, PGD2 was infused into the third ventricle at four different locations between 23:00 and 05:00. In a location apposed to the medial preoptic area (MPO), PGD2 at doses 1, 10 and 100 pmol/min, increased the slow wave sleep (SWS) by 23% (p < or = 0.01), 35% (p < or = 0.05) and 44% (p < or = 0.01), respectively, during the infusion period. In the second series of experiments, LXs and LTs were infused at the location apposed to MPO. Significant increases in SWS were detected with LXA4 at 100 pmol/min (14%, p < or = 0.05), LXB4 at 100 pmol/min (20%, p < or = 0.05), and LTD at 10 pmol/min (17%, p < or = 0.05). An increase in paradoxical sleep (PS) was produced by PGD2 at 1 and 10 pmol/min infusion (p < or = 0.05), but not by any of the lipoxygenase-derived eicosanoids examined. PGD2 also elevated the mean brain temperature during infusion by 0.2 degrees C and 0.9 degrees C at infusion doses 10 and 100 pmol/min, respectively. But PGD2 infusion at 1 pmol/min did not elevate the brain temperature. LXs (excluding LXB4 at 100 pmol/min) and LTs did not alter the brain temperature significantly at the tested doses. We conclude that PGD2 is the most effective sleep promoter among the eicosanoids examined so far.
- Subjects :
- Male
Leukotrienes
medicine.medical_specialty
Leukotriene D4
Clinical Biochemistry
Prostaglandin
Body Temperature
Rats, Sprague-Dawley
chemistry.chemical_compound
Internal medicine
Hydroxyeicosatetraenoic Acids
medicine
Animals
Slow-wave sleep
Leukotriene
Lipoxin
Leukotriene C4
Prostaglandin D2
Brain
Cell Biology
Rats
Lipoxins
Endocrinology
chemistry
Eicosanoid
lipids (amino acids, peptides, and proteins)
Sleep
Subjects
Details
- ISSN :
- 09523278
- Volume :
- 51
- Database :
- OpenAIRE
- Journal :
- Prostaglandins, Leukotrienes and Essential Fatty Acids
- Accession number :
- edsair.doi.dedup.....5d1cfa7153fb68cd36453142f34ac9ad
- Full Text :
- https://doi.org/10.1016/0952-3278(94)90083-3