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Histone acetylation as a new mechanism for bilirubin-induced encephalopathy in the Gunn rat
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Histone acetylation as a new mechanism for bilirubin-induced encephalopathy in the Gunn rat
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Histone acetylation as a new mechanism for bilirubin-induced encephalopathy in the Gunn rat
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Journal Article
Histone acetylation as a new mechanism for bilirubin-induced encephalopathy in the Gunn rat
2018
Overview
Bilirubin neurotoxicity has been studied for decades and has been shown to affect various mechanisms
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significant modulation of gene expression. This suggests that vital regulatory mechanisms of gene expression, such as epigenetic mechanisms, could play a role in bilirubin neurotoxicity. Histone acetylation has recently received attention in the CNS due to its role in gene modulation for numerous biological processes, such as synaptic plasticity, learning, memory, development and differentiation. Aberrant epigenetic regulation of gene expression in psychiatric and neurodegenerative disorders has also been described. In this work, we followed the levels of histone 3 lysine 14 acetylation (H3K14Ac) in the cerebellum (Cll) of the developing (2, 9, 17 days after the birth) and adult Gunn rat, the natural model for neonatal hyperbilirubinemia and kernicterus. We observed an age-specific alteration of the H3K14Ac in the hyperbilirubinemic animals. The GeneOntology analysis of the H3K14Ac linked chromatin revealed that almost 45% of H3K14Ac ChiP-Seq TSS-promoter genes were involved in CNS development including maturation and differentiation, morphogenesis, dendritogenesis, and migration. These data suggest that the hallmark Cll hypoplasia in the Gunn rat occurs also
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epigenetically controlled mechanisms during the maturation of this brain structure, unraveling a novel aspect of the bilirubin-induced neurotoxicity.
