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Genome-wide analysis of H3K4me3 in NOS1+ mouse enteric neurons

ABSTRACT: Genome-wide analysis of H3K4me3 in NOS1+ mouse enteric neurons

PROVIDER: PRJNA579930 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR10354758_1.fastq.gz	Fastqsanger.gz
	SRR10354758_2.fastq.gz	Fastqsanger.gz
	SRR10354759_1.fastq.gz	Fastqsanger.gz
	SRR10354759_2.fastq.gz	Fastqsanger.gz

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Genome-wide analysis of H3K4me3 in NOS1+ mouse enteric neurons

Project description:Neuronal nitric oxide synthase 1 (NOS1) produces the gaseous signaling molecule nitric oxide (NO), which plays important roles in the development and function of the nervous system. The regulation of Nos1 gene expression is incompletely understood. Here, we analyzed the genome-wide distribution of the histone mark H3K4me3 in FACS-purified nitrergic enteric neurons by chromatin immunoprecipitation-sequencing.

2024-02-14 | GSE139479 | GEO

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Glial Guidance Drives Postnatal Intestinal Reinnervation by Enteric Neurons

Project description:This study investigates the phenomenon of postnatal plasticity within the enteric nervous system (ENS), specifically investigating the reinnervation potential of post-mitotic enteric neurons. Employing BAF53b-Cre for selective tracing, the reinnervation capabilities of postnatal enteric neurons in multiple model systems are shown. Denervated enteric neurons exhibit the ability to regenerate neurites in vitro, with neurite complexity and direction notably influenced by contact with enteric glial cells (EGCs). In vivo nerve fibers from transplanted enteric neurons exclusively interface with EGCs. Resident EGCs are sustained after Cre dependent ablation of enteric neurons and govern the architecture of the ENS by reinnervating enteric neurons. Transplantation experiments underscore the swift reintegration and reinnervation potential of post-mitotic neurons, leading to restored muscle function within two weeks. Optogenetic investigations further delineate time-dependent functional recovery via transplantation of isolated enteric ganglia. These revelations demonstrate the structural and functional reinnervation capacity of post-mitotic enteric neurons, underscored by EGC guidance.

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Project description:Neurons are central to lifelong learning and memory, but ageing disrupts their morphology and function, leading to cognitive decline. Although epigenetic mechanisms are known to play crucial roles in learning and memory, neuron-specific genome-wide epigenetic maps into old age remain scarce, often being limited to whole-brain homogenates and confounded by glial cells. Here, we mapped H3K4me3, H3K27ac, and H3K27me3 in mouse neurons across their lifespan. This revealed stable H3K4me3 and global losses of H3K27ac and H3K27me3 into old age. We observed patterns of synaptic function gene deactivation, regulated through the loss of the active mark H3K27ac, but not H3K4me3. Alongside this, embryonic development loci lost repressive H3K27me3 in old age. This suggests a loss of a highly refined neuronal cellular identity linked to global chromatin reconfigu-ration. Collectively, these findings indicate a key role for epigenetic regulation in neurons that is inextricably linked with ageing.

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