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NAP1L2 Drives Mesenchymal Stem Cell Senescence and Suppresses Osteogenic Differentiation

ABSTRACT: NAP1L2 Drives Mesenchymal Stem Cell Senescence and Suppresses Osteogenic Differentiation

PROVIDER: PRJNA699762 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR13639811_1.fastq.gz	Fastqsanger.gz
	SRR13639811_2.fastq.gz	Fastqsanger.gz
	SRR13639812_1.fastq.gz	Fastqsanger.gz
	SRR13639812_2.fastq.gz	Fastqsanger.gz
	SRR13639813_1.fastq.gz	Fastqsanger.gz

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Project description:Changes in these genes are probably a consequence of aging, and the real regulators governing BMSC senescence and osteogenesis are still unclear.In the current study, we report that nucleosome assembly-related protein NAP1L2 serves as an important regulator of both the senescence and osteogenic differentiation of BMSCs through inhibition of NF-κB signaling and recruitment of SIRT1 to deacetylate the H3K14ac level on promoters of osteogenic genes. Thus, targeting NAP1L2 using an aging antagonist such as NMN would benefit aging-related disease.

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NAP1L2 Drives Mesenchymal Stem Cell Senescence and Suppresses Osteogenic Differentiation

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Project description:Terminal differentiation of multipotent stem cells is achieved through a coordinated cascade of activated transcription factors and epigenetic modifications that drive gene transcription responsible for unique cell fate. Within the mesenchymal lineage, factors such as RUNX2 and PPARγ are indispensable for osteogenesis and adipogenesis, respectively. We therefore investigated genomic binding of transcription factors and accompanying epigenetic modifications that occur during osteogenic and adipogenic differentiation of mouse bone marrow-derived mesenchymal stem cells (MSC). As assessed by ChIP-seq and RNA-seq analyses, we found that genes vital for osteogenic identity were linked to RUNX2, C/EBPβ, RXR, and VDR binding sites, whereas adipocyte differentiation favored PPARγ, RXR, C/EBPα, and C/EBPβ binding sites. Epigenetic marks were clear predictors of active differentiation loci as well as enhancer activities and selective gene expression. These marrow-derived MSCs displayed an epigenetic pattern that suggested a default preference for the osteogenic pathway; however, these patterns were rapidly altered near the Adipoq, Cidec, Fabp4, Lipe, Plin1, Pparg and Cebpa genes during adipogenic differentiation. Surprisingly, we found that these cells also exhibited an epigenetic plasticity that enabled them to trans-differentiate from adipocytes to osteoblasts (and vice-versa) after commitment, as assessed by staining, gene expression, and ChIP-qPCR analysis. The osteogenic default pathway may be subverted during pathological conditions leading to skeletal fragility and increased marrow adipocity during aging, estrogen deficiency and skeletal unloading. Taken together, our data provide an increased mechanistic understanding of the epigenetic programs necessary for multipotent differentiation of MSCs that may prove beneficial in the development of therapeutic strategies.

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