Abstract：
:Sleep is strongly implicated in learning, especially in the reprocessing of recently acquired memory. Children with intellectual disability (ID) tend to have sleep-wake disturbances, which may contribute to the pathophysiology of the disease. Given that sleep is partly controlled by the circadian clock, we decided to study the rhythmic expression of genes in the hippocampus, a brain structure which plays a key role in memory in humans and rodents. By investigating the hippocampal transcriptome of adult mice, we identified 663 circadian clock controlled (CCC) genes, which we divided into four categories based on their temporal pattern of expression. In addition to the standard core clock genes, enrichment analysis identified several transcription factors among these hippocampal CCC genes, and our findings suggest that genes from one cluster regulate the expression of those in another. Interestingly, these hippocampal CCC genes were highly enriched in sleep/wakefulness-related genes. We show here that several genes in the glucocorticoid signaling pathway, which is involved in memory, show a CCC pattern of expression. However, ID genes were not enriched among these CCC genes, suggesting that sleep or learning and memory disturbances observed in patients with ID are probably not related to the circadian clock in the hippocampus.
journal_name
Neurosciencejournal_title
Neuroscienceauthors
Renaud J,Dumont F,Khelfaoui M,Foisset SR,Letourneur F,Bienvenu T,Khwaja O,Dorseuil O,Billuart Pdoi
10.1016/j.neuroscience.2015.08.066subject
Has Abstractpub_date
2015-11-12 00:00:00pages
11-50eissn
0306-4522issn
1873-7544pii
S0306-4522(15)00807-6journal_volume
308pub_type
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