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Conservation of DNA methylation in human and mouse (AGECAN)

ABSTRACT: Interespecies conservation of brain specific DNA methylation in aging and cancer

PROVIDER: PRJEB41460 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	ERR4863000.fastq.gz	Fastqsanger.gz
	ERR4863010.fastq.gz	Fastqsanger.gz
	ERR4863001.fastq.gz	Fastqsanger.gz
	ERR4863011.fastq.gz	Fastqsanger.gz
	ERR4863002.fastq.gz	Fastqsanger.gz

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Tissue-specific DNA methylation is conserved across species and driven by primary sequence conservation

Project description:Tissue specific differentially methylated regions (DMRs) have been shown to play important roles in tissue specification, but little is known about the conservation pattern of genome-wide DNA methylation distribution that encodes tissue specifity. Using a comparative approach, we identified and compared the tissue-specific DNA methylation patterns of the rat against that of mouse and human across three common tissue types. We found that 10%-40% of this tissue-specific DNA methylation pattern is conserved, and this epigenetic onservation is associated with the conservation of tissue specific TFBS.

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Project description:The decline of brain function during aging is associated with epigenetic changes, including DNA methylation. Lifestyle interventions can improve brain function during aging, but their influence on age-related epigenetic changes is unknown. Using genome-wide DNA methylation sequencing, we here show that environmental enrichment counteracted age-related DNA methylation changes in the hippocampal dentate gyrus of mice. Specifically, environmental enrichment prevented the aging-induced CpG hypomethylation at target sites of the methyl-CpG-binding protein Mecp2, which is known to control neuronal functions. The genes at which environmental enrichment counteracted aging effects have described roles in neuronal plasticity, neuronal cell communication and adult hippocampal neurogenesis and are dysregulated with age-related cognitive decline in the human brain. Our results highlight the rejuvenating effects of environmental enrichment at the level of DNA methylation and give molecular insights into the specific aspects of brain aging that can be counteracted by lifestyle interventions.

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Project description:The decline of brain function during aging is associated with epigenetic changes, including DNA methylation. Lifestyle interventions can improve brain function during aging, but their influence on age-related epigenetic changes is unknown. Using genome-wide DNA methylation sequencing, we here show that experiencing a stimulus-rich environment counteracted age-related DNA methylation changes in the hippocampal dentate gyrus of mice. Specifically, environmental enrichment prevented the aging-induced CpG hypomethylation at target sites of the methyl-CpG-binding protein Mecp2, which is known to control neuronal functions. The genes at which environmental enrichment counteracted aging effects have described roles in neuronal plasticity, neuronal cell communication and adult hippocampal neurogenesis and are dysregulated with age-related cognitive decline in the human brain. Our results highlight the rejuvenating effects of environmental enrichment at the level of DNA methylation and give molecular insights into the specific aspects of brain aging that can be counteracted by lifestyle interventions.

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Project description:The decline of brain function during aging is associated with epigenetic changes, including DNA methylation. Lifestyle interventions can improve brain function during aging, but their influence on age-related epigenetic changes is unknown. Using genome-wide DNA methylation sequencing, we here show that experiencing a stimulus-rich environment counteracted age-related DNA methylation changes in the hippocampal dentate gyrus of mice. Specifically, environmental enrichment prevented the aging-induced CpG hypomethylation at target sites of the methyl-CpG-binding protein Mecp2, which is known to control neuronal functions. The genes at which environmental enrichment counteracted aging effects have described roles in neuronal plasticity, neuronal cell communication and adult hippocampal neurogenesis and are dysregulated with age-related cognitive decline in the human brain. Our results highlight the rejuvenating effects of environmental enrichment at the level of DNA methylation and give molecular insights into the specific aspects of brain aging that can be counteracted by lifestyle interventions.

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