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Low Maternal Dietary Intake of Choline Regulates Toll‐Like Receptor 4 Expression Via Histone H3K27me3 in Fetal Mouse Neural Progenitor Cells
Author(s) -
Guan Xingying,
Chen Xuedan,
Dai Limeng,
Ma Jiming,
Zhang Qiming,
Qu Song,
Bai Yun,
Wang Yanyan
Publication year - 2021
Publication title -
molecular nutrition and food research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.495
H-Index - 131
eISSN - 1613-4133
pISSN - 1613-4125
DOI - 10.1002/mnfr.202000769
Subject(s) - neurogenesis , biology , epigenetics , progenitor cell , dna methylation , neural stem cell , choline , tlr4 , microbiology and biotechnology , gene expression , endocrinology , stem cell , signal transduction , gene , biochemistry
Scope Choline is an essential nutrient and a primary dietary source of methyl groups that are vital for brain development. Low choline (LC) in the maternal diet during pregnancy alters neurogenesis in the fetal brain and leads to low cognitive performance. However, the key signaling pathways that are sensitive to maternal choline supply during neural progenitor cell (NPC) development and the epigenetic mechanisms by which choline availability regulates gene expression are unclear. Methods and results Timed‐pregnant Nestin‐CFPnuc transgenic mice are fed either a control diet or LC diet during E11–17. Gene expression changes in sorted E17 NPCs are identified by RNA sequencing. A maternal LC diet significantly increases Tlr4 transcription, causing premature neuronal differentiation and enhanced ethanol‐induced NLRP3 inflammasome activation. No changes in DNA methylation at the Tlr4 gene promoter region are detected; however, a 70% decrease in H3K27me3 is observed in the LC‐treated NPCs. Inhibition of EZH2 decreases H3K27me3 levels and increases Tlr4 expression. Conversely, the application of catalytically inactive Cas9 with EZH2 to increase H3K27me3 at the Tlr4 promoter causes reduced Tlr4 expression. Conclusion These data reveal an epigenetic mechanism for the effect of maternal choline availability on brain development, suggesting a likely intervention for neurodevelopmental diseases.