文章基本信息

标题：A ketogenic diet rescues hippocampal memory defects in a mouse model of Kabuki syndrome
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作者：Joel S. Benjamin ; Genay O. Pilarowski ; Giovanni A. Carosso 等
期刊名称：Proceedings of the National Academy of Sciences
印刷版ISSN：0027-8424
电子版ISSN：1091-6490
出版年度：2017
卷号：114
期号：1
页码：125-130
DOI：10.1073/pnas.1611431114
语种：English
出版社：The National Academy of Sciences of the United States of America
摘要：Kabuki syndrome is a Mendelian intellectual disability syndrome caused by mutations in either of two genes ( KMT2D and KDM6A ) involved in chromatin accessibility. We previously showed that an agent that promotes chromatin opening, the histone deacetylase inhibitor (HDACi) AR-42, ameliorates the deficiency of adult neurogenesis in the granule cell layer of the dentate gyrus and rescues hippocampal memory defects in a mouse model of Kabuki syndrome ( Kmt2d ^+/βGeo). Unlike a drug, a dietary intervention could be quickly transitioned to the clinic. Therefore, we have explored whether treatment with a ketogenic diet could lead to a similar rescue through increased amounts of beta-hydroxybutyrate, an endogenous HDACi. Here, we report that a ketogenic diet in Kmt2d ^+/βGeo mice modulates H3ac and H3K4me3 in the granule cell layer, with concomitant rescue of both the neurogenesis defect and hippocampal memory abnormalities seen in Kmt2d ^+/βGeo mice; similar effects on neurogenesis were observed on exogenous administration of beta-hydroxybutyrate. These data suggest that dietary modulation of epigenetic modifications through elevation of beta-hydroxybutyrate may provide a feasible strategy to treat the intellectual disability seen in Kabuki syndrome and related disorders.
关键词：epigenetics ; histone machinery ; adult neurogenesis ; intellectual disability ; ketone bodies