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Enhancer profiling uncovers JMJD1C as essential suppressor in neuropathic pain by targeting SOCS

ABSTRACT: Neuropathic pain (NP) is induced by injury or diseases of the somatosensory nervous system, which markedly impairs patients’ quality of life. Super-enhancers (SEs) are important cis-regulatory elements, but how they affect NP remains elusive. Therefore, we aim to explore the molecular mechanism by which SEs are involved in NP progression and identify potential drug candidate targets. We first established a rat model characterized with typical NP, and subsequently performed RNA-Seq and H3K27ac ChIP-Seq on spinal cord tissues of NP rats to analyze the active enhancers at the genome-wide level. By analyzing the SE-associated genes involved in NP, combined with qPCR and double immunofluorescence staining results, we found that Jmjd1c is a core SE-associated regulator in NP progression, and Sox6 could activate Jmjd1c transcription by binding to its SE.

ORGANISM(S): Rattus norvegicus

PROVIDER: GSE256469 | GEO | 2024/09/01

REPOSITORIES: GEO

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Jmjd1c

Project description:Jmjd1c

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Enhancer profiling uncovers JMJD1C as essential suppressor in neuropathic pain by targeting SOCS

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RNA expression analysis upon JMJD1C depletion

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2015-11-02 | E-GEOD-63485 | biostudies-arrayexpress

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Project description:The AML1-ETO fusion protein, a transcription factor generated by the t(8;21) translocation in acute myeloid leukaemia (AML), dictates a leukemic program by increasing self-renewal and inhibiting differentiation. Here we demonstrate that the histone demethylase JMJD1C functions as a co-activator for AML1-ETO and is required for its transcriptional program. JMJD1C is directly recruited by AML1-ETO to its target genes and regulates their expression by maintaining low H3K9me2 levels. Analyses in JMJD1C knockout mice also establish a JMJD1C requirement for AML1-ETO’s ability to increase proliferation. We also show a critical role for JMJD1C in the survival of multiple human AML cell lines, suggesting that it is required for leukemic programs in different AML cell types through its association with key transcription factors.

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JMJD1C knockdown (H9_CT2_JMJD1C-KD_Microarray_JW)

Project description:It has been recently reported that the pluripotency factor OCT4, the early neural inducing factor NR2F2, and the pluripotency-associated miRNA miR-302 are linked in a regulatory circuitry that critically regulate both pluripotency and neural differentiation of human embryonic stem cells (hESCs). We show here that JMJD1C, a H3K9 demethylase expressed in undifferentiated hESCs, plays a key role in the regulatory circuitry. hESCs with JMJD1C knockdown (KD) retain the state of self-renewal and pluripotency, but express lower miR-302c than control hESCs. JMJD1C directly binds to the miR-302 promoter in hESCs and reduces H3K9 methylation on the promoter. Upon withdrawal of bFGF (an inhibitor of neural initiation) from a defined culture medium, the KD, but not control, hESCs differentiate into neural progenitors within three days – the fastest ever reported, accompanied by rapid increase of NR2F2 expression. A miR-302c analogue or an inhibitor of H3K9 methylation reduces neural induction from the KD hESCs, whereas a miR-302c inhibitor promotes hESC differentiation. Together, our findings suggest that JMJD1C plays a central role in control of neural differentiation from hESCs, which involves sustained miR-302c expression, and that inhibition of JMJD1C is sufficient to rapidly induce neural progenitors from hESCs in the defined medium depleted of bFGF. This is also the first evidence, to our knowledge, for epigenetic modification of miR-302 in hESCs. 6 human ES cell lines were used in this microarray assay. Each line has two replicates.

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Tex10 Coordinates Epigenetic Control of Super-Enhancer Activity for Pluripotency and Reprogramming [ChIP-Seq]

Project description:Super-enhancers (SEs) are large clusters of transcriptional enhancers that are co-occupied by multiple lineage specific transcription factors driving expression of genes that define cell identity. In embryonic stem cells (ESCs), SEs are highly enriched for Oct4, Sox2, and Nanog in the enhanceosome assembly and express enhancer RNAs (eRNAs). We sought to dissect the molecular control mechanism of SE activity and eRNA transcription for pluripotency and reprogramming. Starting from a protein interaction network surrounding Sox2, a key pluripotency and reprogramming factor that guides the ESC-specific enhanceosome assembly and orchestrates the hierarchical transcriptional activation during the final stage of reprogramming, we discovered Tex10 as a novel pluripotency factor that is evolutionally conserved and functionally significant in ESC self-renewal, early embryo development, and reprogramming. Tex10 is enriched at SEs in a Sox2-dependent manner and coordinates histone acetylation and DNA demethylation of SEs. Our study sheds new light on epigenetic control of SE activity for cell fate determination. Genome binding/occupancy profiling of Tex10 was performed in mouse embryonic stem cells by ChIP sequencing.

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