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Comparing 5hmC enrichment in HUVEC following TET2 or TET3 silencing.

ABSTRACT: Hydroxymethylated DNA immunoprecipitation sequencing of HUVEC following siRNA-mediated silencing of TET2 or TET3, compared to a scrambled siRNA control.

ORGANISM(S): Homo sapiens

PROVIDER: GSE232145 | GEO | 2026/08/31

REPOSITORIES: GEO

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Comparing 5hmC enrichment in HUVEC following TET2 or TET3 silencing.

Project description:Comparing 5hmC enrichment in HUVEC following TET2 or TET3 silencing.

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A comparison of the effects of TET silencing or high glucose culture on the HUVEC transcriptome

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Circadian clock regulator Bmal1 gates axon regeneration via Tet3-5hmC mediated epigenetics

Project description:Axon regeneration of dorsal root ganglia (DRG) neurons after peripheral axotomy involves epigenetic reconfigurations that rewire gene regulatory circuits to establish regenerative gene program. However, the mechanisms and transcriptional regulators remain poorly understood. Here, we conducted an unbiased survey of DNA differentially hydroxymethylated regions (DhMRs) in DRG after peripheral lesion, which identified enriched binding motif for Bmal1, a transcription factor and a central regulator of the circadian clock. Through applying conditional deletion of Bmal1, in vitro and in vivo models of axon regrowth, and transcriptomic profiling, we showed that Bmal1 inhibits axon regeneration in part through Tet3-dependent manner. Mechanistically, Bmal1 functions as a gatekeeper of neuroepigenetic injury responses by limiting Tet3 expression and restricting 5hmC modifications. Notably, Bmal1-regulated genes after axotomy not only concern axon guidance and axon regrowth, but also stress responses, energy homeostasis, and neuroinflammation. Furthermore, we uncovered diurnal oscillation of Tet3 and 5hmC in DRG neurons, and this epigenetic rhythm corresponded to time-of-day effect on axon growth potential. Collectively, our studies showed that Bmal1 deletion mimics the conditioning lesion in lifting epigenetic barriers to enhance axon regeneration.

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Project description:To examine the influences for 5hmC enrichment on genome wide after Tet3 inactivation, we determined the enrichment profiles of 5hmC, the direct demethylated target of Tet3, by hMeDIP-seq with genomic DNA from control and Tet3 inactivated lung smooth muscle cells

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Loss of TET3-mediated 5hmC promotes the Neurodegeneration of Alzheimer’s disease

Project description:Alzheimer's disease (AD) was attributed to alterations in multiple epigenetic systems including DNA methylation and demethylation patterns. DNA 5-hydroxymethylcytosin (5hmC), an epigenetic hallmark, plays importantly regulatory role in many biological processes. However, the 5hmC-mediated epigenetic underpinnings of AD neurodegeneration remain poorly understood. Here we report that selective loss of 5hmC is substantially presented in human AD and 3xTg-AD mouse neocortical and hippocampal neurons. Quantitative genome-wide analysis of hMeDIP-seq reveals that neuron-specific shift in decreased 5hmC enrichment in regions of promoter, intergenic and gene body of mRNA and lncRNA genes was found in3xTg-AD mice. We further identified that TET3, an enzyme that converts 5-methylcytosine (5mC) to 5hmC, responded to Beta amyloid neuronal toxicity and was mainly responsible for loss of 5hmC in AD brain. Overexpression of human TET3 catalytic domain (hTET3CD) significantly improves the neuroinflammation, neuropathological progression and cognitive deficits in 3xTg-AD mice. These findings implicate as a potential hallmark, TET3-mediated 5hmC epigenetic dysregulation is involved in driving AD neurodegeneration.

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Methylation arrays elucidate 5mC and 5hmC levels of human glioblastoma cell line LN229 upon restoration of TET3 expression.

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