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HRP2-MINA complex reprograms t(4;14) multiple myeloma epigenome to dictate chemosensitivity to proteasome inhibitors [ChIP-Seq]

ABSTRACT: 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.

ORGANISM(S): Homo sapiens

PROVIDER: GSE166526 | GEO | 2021/02/11

REPOSITORIES: GEO

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NAP1L2 Drives Mesenchymal Stem Cell Senescence and Suppresses Osteogenic Differentiation [RNA-Seq]

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.

2021-02-06 | GSE166243 | GEO

NAP1L2 Drives Mesenchymal Stem Cell Senescence and Suppresses Osteogenic Differentiation [ChIP-Seq]

2021-02-06 | GSE166242 | GEO

HRP2-MINA complex reprograms t(4;14) multiple myeloma epigenome to dictate chemosensitivity to proteasome inhibitors

Project description:This SuperSeries is composed of the SubSeries listed below.

2021-02-11 | GSE166527 | GEO

HRP2-MINA complex reprograms t(4;14) multiple myeloma epigenome to dictate chemosensitivity to proteasome inhibitors [RNA-Seq]

Project description:Depletion of HRP2 induced remarkable resistance to PIs induced apoptosis of MM cells in vitro and in vivo, and suppressed expression of HRP2 was observed in bortezomib-resistant (BR) MM cells. Notably, HRP2 altered chemosensitivity more obviously in MM cells with t(4;14) translocation, and much remarkable resistant to PIs than other reagents. Moreover, HRP2 abolition of HRP2 augmented H3K27me3 modification, consequentially intensifying transcriptome alteration prone to cell survival and restriction of endoplasmic reticulum (ER) stress. Mechanistically, HRP2 recognized H3K36me2 and recruited the histone demethylases MYC-induced nuclear antigen (MINA) to degrade H3K27me3, released suppression on genes responsible for drug resistance, such as ATF3 and NR4A1. Thus, an EZH2 inhibitor, tazemetostat, synergistically sensitized anti-MM effect of bortezomib both in vitro and in vivo. Collectively, our study provides novel knowledge to understand the origination of chemoresistance in MM patients with t(4;14), and rationale for managing MM patients according to different genomic backgrounds.

2021-02-11 | GSE166524 | GEO

Transcriptomic profiling of human senescent cells in the setting of pharmacological intervention (NAD+ and NMN)

Project description:Aging and age-relataed pathologies can be delayed by specifically targeting the senescence-associated secretory phenotype (SASP), a hallmark feature of senescent cells. Achieving the goal using small molecules would have a tremendous impact on the quality of lifespan and burden of age-related chronic diseases. We report the potential of two metabolic molecules, NAD+ and NMN, to control the development of the pro-inflammatory phenotype of senescent human stromal cells. This study discloses the impact of NAD+ and NMN on the expression profile of senescent cells and provides a framework for future anti-aging administration with clear rationale.

2022-12-31 | GSE156038 | GEO

A Genome-wide CRISPR-Based Screen Identifies KAT7 as a Senescence Driver

Project description:Understanding the genetic and epigenetic bases of cellular senescence is instrumental to aging intervention. We performed genome-wide CRISPR/Cas9-based screens in two human mesenchymal precursor cell (hMPC) models of progeroid syndromes and identified hundreds of genes whose deficiency alleviated cellular senescence. Among them, KAT7, a histone acetyltransferase, ranked as a top hit in both models. Inactivation of KAT7 decreased H3 lysine 14 acetylation (H3K14ac), repressed p15INK4b transcription, and rejuvenated both physiologically and pathologically aged cells. Moreover, lentiviral vectors encoding Cas9/sg-Kat7 alleviated liver senescence and extended healthspan and lifespan of mice. Our findings demonstrate that CRISPR/Cas9-based genetic screening is a robust method for systematically uncovering unknown senescence genes, of which KAT7 may represent a new therapeutic target for aging intervention.

2020-10-09 | GSE124197 | GEO

Long-term administration of nicotinamide mononucleotide mitigates age-associated physiological decline in mice

Project description:NAD+ availability decreases with age and in certain disease conditions. Nicotinamide mononucleotide (NMN), a key NAD+ intermediate, has been shown to enhance NAD+ biosynthesis and ameliorate various pathologies in mouse disease models. In this study, we conducted a 12 month-long NMN administration to regular chow-fed wild-type C57BL/6N mice during their normal aging. Orally administered NMN was quickly utilized to synthesize NAD+ in tissues. Remarkably, NMN effectively mitigates age-associated physiological decline in mice. Without any obvious toxicity or deleterious effects, NMN suppressed age-associated body weight gain, enhanced energy metabolism, promoted physical activity, improved insulin sensitivity and plasma lipid profile, and ameliorated eye function and other pathophysiologies. Consistent with these phenotypes, NMN prevented age-associated gene expression changes in key metabolic organs and enhanced mitochondrial oxidative metabolism and mitonuclear protein imbalance in skeletal muscle. These effects of NMN highlight the preventive and therapeutic potential of NAD+ intermediates as effective anti-aging interventions in humans.

2016-12-01 | GSE85718 | GEO

Nicotinamide mononucleotide, a key NAD+ precursor, treats the pathophysiology of diet- and age-induced diabetes

Project description:Type 2 diabetes (T2D) has become an epidemic in our modern lifestyle, likely due to calorie-rich diets overwhelming our adaptive metabolic pathways. One such pathway is mediated by nicotinamide phosphoribosyltransferase (NAMPT), the rate-limiting enzyme in mammalian NAD+ biosynthesis, and the NAD+-dependent protein deacetylase SIRT1. Here we show that NAMPT-mediated NAD+ biosynthesis is severely compromised in metabolic organs by high-fat diet (HFD). Strikingly, nicotinamide mononucleotide (NMN), a product of the NAMPT reaction and a key NAD+ intermediate, ameliorates glucose intolerance by restoring NAD+ levels in HFD-induced T2D mice. NMN also enhances hepatic insulin sensitivity and restores gene expression related to oxidative stress, inflammatory response, and circadian rhythm, partly through SIRT1 activation. Furthermore, NAD+ and NAMPT levels show significant decreases in multiple organs during aging, and NMN improves glucose intolerance and lipid profiles in age-induced T2D mice. These findings provide critical insights into a novel intervention against diet- and age-induced T2D. 4 regular chow fed mice (RC1-4) vs 4 high-fat diet fed (HFD) (HFD1a-4a) mice were analyzed on one chip (Chip-A). 4 HFD mice (HFD1b-4b) vs 4 HFD-NMN treated mice (NMN1-4) were examined on the other chip (Chip-B).

2011-12-05 | E-GEOD-31647 | biostudies-arrayexpress

Proteomic analysis of small extracellular vesicles derived from human ESCs

Project description:Tissue-resident stem cell senescence leads to stem cell exhaustion, which is a major cause of physiological and pathological aging. Stem cells-derived extracellular vesicles(SCs-EVs) have been reported to possess therapeutic potential in preclinical studies for diverse diseases. However, whether SCs-EVs could rejuvenate senescent tissue stem cell to prevent age-related disorders still remains unknown. Here, we showed that chronic application of human embryonic stem cells-derived extracellular vesicles (hESCs-sEVs) rescues senescent bone marrow MSCs (BM-MSCs) function and prevents age-related bone loss in aging mice. Transcriptome analysis revealed that hESCs-sEVs treatment up-regulates the expression of genes involved in anti-aging, stem cell proliferation and osteogenic differentiation in BM-MSCs. Furthermore, liquid chromatography-tandem mass spectrometry (LC-MS/MS) analysis identified 4122 proteins encapsulated in hESCs-sEVs. Bioinformatics analysis predicated that protein components in the hESCs-sEVs function in a synergistic way to induce the activation of several canonical signaling pathways, including Wnt, Sirtuin, AMPK, PTEN signaling, which results in the up-regulation of anti-aging genes in BM-MSCs and then the recovery of senescent BM-MSCs function. Collectively, our findings reveal the effect of hESCs-sEVs in reversing BM-MSCs senescence and age-related osteogenic dysfunction, and thereby preventing age-related bone loss. Given that hESCs-sEVs could alleviate senescence of tissue-resident stem cells, it might be a promising therapeutic candidate for age-related diseases.

2021-08-30 | PXD018655 | Pride

Slc12a8 is a nicotinamide mononucleotide transporter that counteracts aging

Project description:NAD+ levels decline in multiple tissues over age, causing various age-associated pathophysiologies. Nicotinamide mononucleotide (NMN) is a key NAD+ intermediate that promotes NAD+biosynthesis and counteracts age-associated physiological decline. However, how NMN transport is regulated remains unknown. Here we report a novel NMN transporter encoded by the Slc12a8 gene. Slc12a8 is highly expressed and regulated by NAD+ in the small intestine. Knocking down this gene abrogates the transport of NMN in vitro and in vivo. Slc12a8 exhibits specificity to NMN and dependency on the sodium ion. Slc12a8 deficiency significantly decreases NAD+ levels in the jejunum and ileum, due to decreases in NMN uptake traced by doubly labeled isotopic NMN. Slc12a8 expression is upregulated in the aged ileum, contributing to the maintenance of NAD in aged mice. Thus, this newly identified NMN transporter plays a critical role in counteracting NAD+ decline during aging.

2019-01-01 | GSE118365 | GEO

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