Disturbance of rapid eye movement sleep in senescence-accelerated mouse prone/8 mice is improved by retinoic acid receptor agonist Am80 (Tamibarotene).
Senescence-accelerated mouse prone/8 (SAMP8) mice are known to exhibit age-related deterioration in sleep-wake architecture compared with senescence-accelerated mouse resistant/1 (SAMR1) mice. We investigated whether treatment with Am80 (Tamibarotene), a retinoic acid receptor agonist, would improve sleep in 9-10-month-old SAMP8 mice. One week of Am80 administration improved the decrease in rapid eye movement (REM) sleep shown by SAMP8 mice. Real-time RT-PCR analysis demonstrated an impairment in the hippocampal retinoid cascade (retinoic acid receptor alpha and transthyretin) in SAMP8 in comparison to SAMR1 mice. Am80 treatment induced an increase in mRNA expression in the vesicular acetylcholine transporter in the brainstem and transthyretin in the hippocampus. Furthermore, decreased cortical acetylcholine content in SAMP8 was improved by Am80 administration. Decreased non-REM sleep and delta oscillation were also observed in SAMP8 mice; however, this was not improved by Am80 administration. These results partially support the hypothesis that the effects of aging on sleep-wake architecture are improved by the activation of retinoic acid receptors. The improvement may be induced by the activation of the cholinergic pathway.
Kitaoka
K
K
Department of Physiology, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan.
Sano
A
A
Chikahisa
S
S
Yoshizaki
K
K
Séi
H
H
D000109:Acetylcholine / Q000378:metabolism; D000375:Aging / Q000502:physiology*; D000818:Animals; D001565:Benzoates / Q000494:pharmacology* / Q000627:therapeutic use; D001923:Brain Chemistry / Q000187:drug effects / Q000502:physiology; D001933:Brain Stem / Q000187:drug effects / Q000378:metabolism / Q000503:physiopathology; D004195:Disease Models, Animal; D006624:Hippocampus / Q000187:drug effects / Q000378:metabolism / Q000503:physiopathology; D008297:Male; D051379:Mice; D008818:Mice, Neurologic Mutants; D011228:Prealbumin / Q000235:genetics; D012333:RNA, Messenger / Q000187:drug effects / Q000378:metabolism; D018168:Receptors, Retinoic Acid / Q000819:agonists* / Q000235:genetics; D000072482:Retinoic Acid Receptor alpha; D012176:Retinoids / Q000494:pharmacology* / Q000627:therapeutic use; D015398:Signal Transduction / Q000187:drug effects / Q000502:physiology; D012893:Sleep Wake Disorders / Q000188:drug therapy* / Q000378:metabolism / Q000503:physiopathology; D012895:Sleep, REM / Q000187:drug effects* / Q000502:physiology; D013764:Tetrahydronaphthalenes / Q000494:pharmacology* / Q000627:therapeutic use; D015854:Up-Regulation / Q000187:drug effects / Q000235:genetics; D050494:Vesicular Acetylcholine Transport Proteins / Q000235:genetics
D001565:Benzoates; D011228:Prealbumin; D012333:RNA, Messenger; C000607072:Rara protein, mouse; D018168:Receptors, Retinoic Acid; D000072482:Retinoic Acid Receptor alpha; D012176:Retinoids; C493460:Slc18a3 protein, mouse; D013764:Tetrahydronaphthalenes; D050494:Vesicular Acetylcholine Transport Proteins; C061133:tamibarotene; D000109:Acetylcholine