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Initiation Phase Cellular Reprogramming Rejuvenates DNA Damage Repair Defect In The Ercc1 Accelerated Aging Mouse Model

ABSTRACT: Initiation Phase Cellular Reprogramming Rejuvenates DNA Damage Repair Defect In The Ercc1 Accelerated Aging Mouse Model

PROVIDER: PRJNA968158 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR24460300_1.fastq.gz	Fastqsanger.gz
	SRR24460300_2.fastq.gz	Fastqsanger.gz
	SRR24460301_1.fastq.gz	Fastqsanger.gz
	SRR24460301_2.fastq.gz	Fastqsanger.gz
	SRR24460302_1.fastq.gz	Fastqsanger.gz

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Initiation Phase Cellular Reprogramming Rejuvenates DNA Damage Repair Defect In The Ercc1 Accelerated Aging Mouse Model

Project description:Unlike aging somatic cells, which exhibit a decline in molecular fidelity and eventually reach a state of replicative senescence, pluripotent stem cells can indefinitely replenish themselves while retaining full homeostatic capacity. The conferment of beneficial -pluripotency related traits via in vivo partial cellular reprogramming (IVPR) significantly extends lifespan and restores aging phenotypes in mouse models. Although the phases of cellular reprogramming are well characterized, details of the rejuvenation processes are poorly defined. Here we created the first reprogrammable accelerated aging mouse model with a DNA damage repair defect to better understand the effects of reprogramming on a key driver of aging. Using enhanced partial reprogramming by combining small molecules with the Yamanaka factors, we observed potent reversion of DNA damage, significant upregulation of multiple DNA damage repair processes, and restoration of the epigenetic clock is observed. In addition, we present evidence that TGFb inhibition of the ALK5 or ALK2 receptor is able to phenocopy some benefits including epigenetic clock restoration suggesting a role in the mechanism of rejuvenation during partial reprogramming.

2023-05-11 | GSE231853 | GEO

Supplementation with Lactobacillus plantarum WCFS1 prevents Decline of Mucus Barrier in Colon of Accelerated Aging Ercc1-/Δ7 Mice

Project description:Although it is clear that probiotics improve intestinal barrier function, little is known about the effects of probiotics on the aging intestine. We investigated effects of 10-wk bacterial supplementation of Lactobacillus plantarum WCFS1, Lactobacillus casei BL23, or Bifidobacterium breve DSM20213 on gut barrier and immunity in 16-week-old accelerated aging Ercc1-/Δ7 mice, which have a median lifespan of ~20wk, and their wild-type littermates. The colonic barrier in Ercc1-/Δ7 mice was characterized by a thin (<10µm) mucus layer. L. plantarum prevented this decline in mucus integrity in Ercc1-/Δ7 mice, whereas B. breve exacerbated it. Bacterial supplementations affected the expression of immune-related genes, including Toll-like receptor 4. Regulatory T cell frequencies were increased in the mesenteric lymph nodes of L. plantarum- and L. casei-treated Ercc1-/Δ7 mice. L. plantarum- and L. casei-treated Ercc1-/Δ7 mice showed increased specific antibody production in a T cell-dependent immune response in vivo. By contrast, the effects of bacterial supplementation on wild-type control mice were negligible. Thus, supplementation with L. plantarum – but not with L. casei and B. breve – prevented the decline in the mucus barrier in Ercc1-/Δ7 mice. Our data indicate that age is an important factor influencing beneficial or detrimental effects of candidate probiotics. These findings also highlight the need for caution in translating beneficial effects of probiotics observed in young animals or humans to the elderly.

2016-10-19 | GSE87368 | GEO

RNA-Seq profiling of ERCC1-XPF DNA repair defect (Er1F/-) versus wild type (Er1F/+) macrophages

Project description:DNA damage and metabolic disorders are intimately linked with premature disease onset but the underlying mechanisms remain poorly understood. Persistent DNA damage accumulation in tissue-infiltrating macrophages carrying an ERCC1-XPF DNA repair defect (Er1F/-) riggers Golgi dispersal, dilation of endoplasmic reticulum, autophagy and exosome biogenesis leading to the secretion of extracellular vesicles (EVs) in vivo and ex vivo.

2019-11-04 | E-MTAB-8439 | biostudies-arrayexpress

Transcription profiling of liver from wild type or Ercc1 mutant mice

Project description:The XPF-ERCC1 endonuclease is required for repair of helix-distorting DNA damage and interstrand crosslinks. Here we have engineered a severe mutation in Ercc1 gene (in which the last 7 amino acids are missing; named as "Ercc1-delta") leading to extreme sensitivity to DNA crosslinks and progeria.To investigate whether a disturbance in growth and metabolism could explain the pronounced accelerated organismal deterioration seen in Ercc1 delta mice, we evaluated the liver transcriptome of 16-week-old wt and mutant mice (n=6). At this age, the Ercc1-delta mice have not yet become cachectic.

2008-06-01 | E-MEXP-1503 | biostudies-arrayexpress

Akkermansia muciniphila supplementation in accelerated aging Ercc1-/Δ7 mice

Project description:Akkermansia muciniphila ameliorates the age-related decline in colonic mucus thickness and attenuates immune activation in accelerated aging Ercc1-/Δ7 mice

| PRJEB31523 | ENA

RNA-Seq profiling of ERCC1-XPF DNA repair defect (Er1F/-) versus wild type (Er1F/+) macrophages

Project description:RNA-Seq profiling of ERCC1-XPF DNA repair defect (Er1F/-) versus wild type (Er1F/+) macrophages

| PRJEB34889 | ENA

Two siblings with strong NER inactivation due to inherited ERCC1 deficiency display mild clinical features of XP and CS with severe liver impairment

Project description:The ERCC1-XPF heterodimer is a multifunctional endonuclease involved in nucleotide excision repair (NER), inter-strand crosslink (ICL) repair, and DNA double-strand break (DSB) repair. Only two patients with inherited ERCC1 defects have been reported who both died at an early age. Here, we describe a new case of ERCC1 deficiency in two siblings (11 and 13 years) who show mild features of Xeroderma Pigmentosum and Cockayne Syndrome. Both patients displayed microcephaly, mild developmental delay, mild photosensitivity, and severe cholestatic liver problems. Genetic analysis revealed a maternal deletion and a paternal missense variant in ERCC1 (R156W) that affect a salt bridge just below the XPA-binding pocket. Studies in patient-derived fibroblasts and reconstituted knockout cells confirmed that mutant ERCC1 is not efficiently recruited to the NER complex due to a decreased interaction with XPA. Consequently, patient cells show a strong NER defect, although residual repair could be detected. The steady-state protein levels of ERCC1 and XPF were severely reduced in patient cells, but this only led to a mild defect in ICL repair, and no impact on DSB repair. We report a new case of ERCC1 deficiency that particularly affect NER and has only a mild impact on other ERCC1-dependent repair pathways.

2021-01-26 | PXD017940 | Pride

Transcription profiling of Ercc1 white adipose tissue

Project description:Transcriptome analysis of epididymal white adipose tissue (WAT) depots in Ercc1 animals: To further elucidate the role of ERCC1 in WAT we scanned the transcriptome of 15 day old wt and Ercc1 epididymal WAT.

2013-11-04 | E-MEXP-3930 | biostudies-arrayexpress

Down-regulation of cholesterol biosynthesis in forebrains of ERCC1-deficient mice

Project description:Background: Several genetic defects of the nucleotide excision repair (NER) pathway, including deficiency of the Excision Repair Cross-Complementing rodent repair deficiency, complementation group 1 (ERCC1), result in pre-mature aging, impaired growth, microcephaly and delayed development of the cerebellum. Such a phenotype also occurs in ERCC1-knockout mice which survive for up to 4 weeks after birth. Therefore, we analyzed cerebellar and hippocamapal transcriptomes of these animals at 3 weeks of age to identify the candidate mechanisms underlying brain consequences of reduced ERCC1 activity. Results: In the cerebellum, the most prominent change was upregulation of genes that are associated with gliosis. Although Purkinje cell degeneration has been reported in some mouse strains with NER impairment, Purkinje cell transcriptome was mostly unaffected by the ERCC1 knockout. In the hippocampus, the gliosis response was minimal. Instead, there was an extensive downregulation of genes related to lipid metabolism including several enzymes of the cholesterol biosynthesis pathway as well as lipoproteins and plasma membrane proteins. Reduced expression of the cholesterol biosynthesis pathway genes was also present in the neocortex of adult mice whose ERCC1 gene was replaced by a mutant allele with a partial activity. Conclusions: Downregulation of forebrain cholesterol biosynthesis genes is a newly identified consequence of ERCC1 deficiency. Its presence in adult mice suggests that it is not a secondary consequence of brain growth impairment. Instead, reduced cholesterol biosynthesis may contribute to such an impairment as well as affect function of mature synapses.

2011-08-16 | GSE31199 | GEO

Caloric restriction rejuvenates myofiber growth in heart failure

Project description:Heart failure with preserved ejection fraction (HFpEF) is characterised by a distinct but poorly understood in skeletal muscle pathology. In a rat model ZSF1, we identify impaired myonuclear accretion as a mechanism for ablated myofiber growth in HFpEF following resistance exercise intervention. Muscle vascular or mitochondrial dysfunction, or impaired protein synthesis signalling, do not appear as primary limiting mechanisms, and cardiac therapies do not attenuate skeletal muscle pathology. However, we identify that acute caloric restriction rejuvenates myofiber growth in HFpEF during resistance exercise intervention.

2025-01-19 | E-MTAB-12494 | biostudies-arrayexpress

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