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- W2593914458 abstract "Abstract The chipmunk hibernation-related protein 25 (HP-25) is involved in the circannual control of hibernation in the brain. The liver-specific expression of the HP-25 gene is repressed in hibernating chipmunks under the control of endogenous circannual rhythms. However, the molecular mechanisms that differentially regulate the HP-25 gene during the nonhibernation and hibernation seasons are unknown. Here, we show that the hibernation-associated HP-25 expression is regulated epigenetically. Chromatin immunoprecipitation analyses revealed that significantly less hepatocyte nuclear receptor HNF-4 bound to the HP-25 gene promoter in the liver of hibernating chipmunks compared to nonhibernating chipmunks. Concurrently in the hibernating chipmunks, coactivators were dissociated from the promoter, and active transcription histone marks on the HP-25 gene promoter were lost. On the other hand, small heterodimer partner (SHP) expression was upregulated in the liver of hibernating chipmunks. Overexpressing SHP in primary hepatocytes prepared from nonhibernating chipmunks caused HNF-4 to dissociate from the HP-25 gene promoter, and reduced the HP-25 mRNA level. These results suggest that hibernation-related HP-25 expression is epigenetically regulated by the binding of HNF-4 to the HP-25 promoter, and that this binding might be modulated by SHP in hibernating chipmunks." @default.
- W2593914458 created "2017-03-16" @default.
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- W2593914458 date "2017-03-10" @default.
- W2593914458 modified "2023-09-23" @default.
- W2593914458 title "HNF-4 participates in the hibernation-associated transcriptional regulation of the chipmunk hibernation-related protein gene" @default.
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- W2593914458 doi "https://doi.org/10.1038/srep44279" @default.
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