We performed RNA-seq and miRNA-seq in fetal RPE cells differentated during 5 weeks in a transwell set up Overall design: Samples from days 7, 14, 21, 28 and 35 were characterized. Cells were grown in a proliferation medium during the first week (EpiCM) and then in a maturation medium (MAM medium) that enahnces differentiation towards the desired phenotype.
HtrA1 Mediated Intracellular Effects on Tubulin Using a Polarized RPE Disease Model.
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View SamplesThe Polycomb group (PcG) protein enhancer of zeste homolog 2 (EZH2) plays an essential role in histone methylation-mediated epigenetic gene silencing. We demonstrate that under physiological conditions, cyclin-dependent kinase 1 (CDK1) and 2 (CDK2) bind to and phosphorylate EZH2 at threonine 350 (T350) in an evolutionally conserved motif.
Cyclin-dependent kinases regulate epigenetic gene silencing through phosphorylation of EZH2.
Cell line, Treatment
View SamplesJoMa1 cells are pluripotent precursor cells, derived from the neural crest of mice transgenic for tamoxifen-inducible c-Myc. Following transfection with a cDNA encoding for MYCN, cells become immortlized even in the absence of tamoxifen.
MYCN and ALKF1174L are sufficient to drive neuroblastoma development from neural crest progenitor cells.
Specimen part, Cell line
View SamplesGene expression profile in CS1AN deficient and CSBwt restored cell lines after 24 hours of UV or alphe-amanitin treatment (only for restored). The comaprison of expression profile between 0 and 24 hours revealed
Regulatory interplay of Cockayne syndrome B ATPase and stress-response gene ATF3 following genotoxic stress.
Specimen part, Treatment
View SamplesThis SuperSeries is composed of the SubSeries listed below.
Defective mitophagy in XPA via PARP-1 hyperactivation and NAD(+)/SIRT1 reduction.
Sex, Cell line, Treatment
View SamplesMitochondrial dysfunction is a common feature in neurodegeneration and aging. We identify mitochondrial dysfunction in xeroderma pigmentosum group A (XPA), a nucleotide excision DNA repair disorder with severe neurodegeneration, in silico and in vivo. XPA deficient cells show defective mitophagy with excessive cleavage of PINK1 and increased mitochondrial membrane potential. The mitochondrial abnormalities appear to be caused by decreased activation of the NAD+-SIRT1-PGC-1 axis triggered by hyperactivation of the DNA damage sensor PARP1. This phenotype is rescued by PARP1 inhibition or by supplementation with NAD+ precursors that also rescue the lifespan defect in xpa-1 nematodes. Importantly, this pathogenesis appears common to ataxia-telangiectasia and Cockayne syndrome, two other DNA repair disorders with neurodegeneration, but absent in XPC, a DNA repair disorder without neurodegeneration. Our findings reveal a novel nuclear-mitochondrial cross-talk that is critical for the maintenance of mitochondrial health.
Defective mitophagy in XPA via PARP-1 hyperactivation and NAD(+)/SIRT1 reduction.
Sex, Treatment
View SamplesMetformin, a commonly used drug prescribed to treat type-2 diabetes, has been found to extend health span and delay cancer incidence and progression. Here, we report that starting chronic treatment with low dose of metformin (0.1% w/w in diet) at one year of age extends health and lifespan in male mice, while a higher dose (1% w/w) was toxic. Treatment with low dose metformin mimicked some of the benefits of calorie restriction, such as improved physical performance, increased insulin sensitivity, and reduced LDL and cholesterol levels. At a molecular level, metformin increased AMP-activated protein kinase activity without attenuation of the mitochondrial electron transport chain activities. Metformin treatment resulted in lower chronic inflammation and increased antioxidant protection, suggesting that the ability of metformin to improve health of laboratory animals may stem from these factors. Our results support that metformin supplementation could be beneficial in extending health and lifespan in humans.
Metformin improves healthspan and lifespan in mice.
Sex, Specimen part
View SamplesPlant compensatory responses depends on transcriptional reprogramming. We used microarray analysis to understand the differential gene expression pattern between clipped (herbivore browsed)
Overcompensation in response to herbivory in Arabidopsis thaliana: the role of glucose-6-phosphate dehydrogenase and the oxidative pentose-phosphate pathway.
Specimen part
View SamplesHigh MC-SFA intake resulted in a downregulation of gene expression of pathways related to complement system and inflammation, and an upregulation of gene expression of pathways related to citric acid cycle, electron transport chain and lipid metabolism in adipose tissue. Based on our results, we hypothesize that the beneficial effects of MC-SFAs on prevention of fat accumulation may be mediated by increases in gene expression related to energy metabolism in the adipose tissue. Additionally, decreases in inflammation-related gene expression in the adipose may potentially have beneficial effects in relation to cardiometabolic diseases.
Dietary medium-chain saturated fatty acids induce gene expression of energy metabolism-related pathways in adipose tissue of abdominally obese subjects.
Sex, Age, Specimen part, Subject
View SamplesParadoxical cryptococcosis-associated immune reconstitution inflammatory syndrome
Transcriptomic Predictors of Paradoxical Cryptococcosis-Associated Immune Reconstitution Inflammatory Syndrome.
Specimen part
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