Silencing of TRIM28 in human iPSC
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ABSTRACT:
PROVIDER: PRJNA643817 | ENA |
REPOSITORIES: ENA
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Project description:TRIM28, a multi-domain protein, is crucial in the development of mouse embryos and the maintenance of embryonic stem cells (ESC) self-renewal potential. As the epigenetic factor modulating the structure of chromatin, TRIM28 regulates the expression of numerous genes and is associated with progression and poor prognosis in many types of cancer. IPSC served as a model of the cells with stem cell-like phenotype, e.g., cancer stem cells. We evaluated the role of TRIM28 in pluripotency maintenance in iPSC by silencing endogenous TRIM28 expression with siRNA (iPSC-siTRIM28). IPSC treated with siRNA with no target sequence served as a control (siCTRL) of the experiment. Cells lacking TRIM28 lose the expression of pluripotency markers, as well as the ability to self-renew, and they start to differentiate. Pathway enrichment analysis using Gene Ontology datasets showed significant upregulation of pathways related to apoptosis, differentiation, cellular response to DNA damage stimulus and cell cycle regulation in iPSC-siTRIM28, relative to reference iPSC (iPSC-WT and iPSC-siCTRL).
2020-07-03 | GSE153726 | GEO
Project description:Reverse transcription-derived sequences account for at least half of the human genome. Although these retroelements are formidable motors of evolution, they can occasionally cause disease, and accordingly are inactivated during early embryogenesis through epigenetic mechanisms. In the mouse, at least for endogenous retroviruses, important mediators of this process are the tetrapod-specific KRAB-containing zinc finger proteins (KRAB-ZFPs) and their cofactor TRIM28. The present study demonstrates that KRAB/TRIM28-mediated regulation is responsible for controlling a very broad range of human-specific endogenous retroelements (EREs) in human embryonic stem (ES) cells and that it exerts, as a consequence, a marked effect on the transcriptional dynamics of these cells. It further reveals reciprocal dependence between TRIM28 recruitment at specific families of EREs and DNA methylation. It finally points to the importance of persistent TRIM28-mediated control of ERE transcriptional impact beyond their presumed inactivation by DNA methylation. Analyses of epigentic effectors and marks in KAP1 WT and KD human embryonic stem cells
2014-05-29 | E-GEOD-57989 | biostudies-arrayexpress
Project description:WTX encodes a tumor suppressor implicated in Wilms tumor and in mesenchymal differentiation, with distinct functions in the cytoplasm, at the plasma membrane and in the nucleus. Here we report that the transcriptional corepressor TRIM28 is the major binding partner for nuclear WTX. The WTX-TRIM28 interaction supports chromatin binding by TRIM28, enhancing transcriptional silencing of some TRIM28 target sequences. In mouse ES cells, where TRIM28-mediated silencing of repetitive sequences is best characterized, Wtx knockdown similarly derepresses endogenous retroviruses and LINE elements. We performed digital gene expression (DGE) profiling using Helicos RNA sequencing. Helicos sequencing does not involve an amplification step, hence it has less bias, especially in sequencing of repetitive elements. We sequenced RNA extracted from mouse ESCs harboring GFP, Wtx or Trim28 hairpins. The resulting sequence reads were aligned with the RefSeq database as well as Repbase, which is a database for the repetitive sequences.
2015-04-16 | E-GEOD-60418 | biostudies-arrayexpress
Project description:TRIM28 (KAP1 - KRAB-associated protein 1) is critical for the silencing of endogenous retroviruses (ERVs) in embryonic stem (ES) cells. Here, we reveal that an essential impact of this process is the protection of cellular gene expression in early embryos from perturbation by cis-acting activators contained within these genetic invaders. In TRIM28-depleted ES cells, repressive chromatin marks at ERVs are replaced by histone modifications typical of active enhancers, stimulating transcription of nearby cellular genes, notably those harboring bivalent promoters. Correspondingly, ERV-derived sequences can repress or enhance expression from an adjacent promoter in transgenic embryos depending on their TRIM28-sensitivity in ES cells. TRIM28-mediated control of ERVs is therefore crucial not just to prevent retrotransposition, but more broadly to safeguard the transcriptional dynamics of early embryos. Analyses of transcriptional profiles and chromatin state in TRIM28 WT and KO cells
2012-12-04 | E-GEOD-41903 | biostudies-arrayexpress
Project description:WTX encodes a tumor suppressor implicated in Wilms tumor and in mesenchymal differentiation, with distinct functions in the cytoplasm, at the plasma membrane and in the nucleus. Here we report that the transcriptional corepressor TRIM28 is the major binding partner for nuclear WTX. The WTX-TRIM28 interaction supports chromatin binding by TRIM28, enhancing transcriptional silencing of some TRIM28 target sequences. In mouse ES cells, where TRIM28-mediated silencing of repetitive sequences is best characterized, Wtx knockdown similarly derepresses endogenous retroviruses and LINE elements.
2015-04-16 | GSE60418 | GEO
Project description:Inbred individuals reared in controlled environments display considerable variance in many complex traits. The underlying cause of this variability has been an enigma, hence the term intangible variation. Here we show that two modifiers of epigenetic gene silencing play a critical role in the process. Inbred mice heterozygous for a null mutation in DNA methyltransferase 3a (Dnmt3a) or tripartite motif protein 28 (Trim28), show greater coefficients of variance in body weight than their wildtype littermates. Inbred mice carrying a mutation in Trim28 develop metabolic syndrome and abnormal behaviour with incomplete penetrance. These studies provide a molecular explanation of developmental noise in whole organisms and suggest that faithful epigenetic control of transcription is central to suppressing deleterious levels of phenotypic variation. These findings have broad implications for understanding the mechanisms underlying sporadic and complex disease in humans. Liver gene expression in Trim28MommeD9 heterozygotes compared to wildtype littermates.
2010-11-15 | E-GEOD-23512 | biostudies-arrayexpress
Project description:TRIM28 interacts with PGR and ESR1 in both human and mouse uterus to modulate estrogen and progesterone signaling. Knocking down of TRIM28 in the human endometrial stromal cells imparied decidualization in vitro. Deletion of TRIM28 from mouse uterus disrupted uterine stromal decidualization leading to infertility. Addtionally, TRIM28 deletion caused abnormal accumulation of TRIM28 postive and PGR negative cells in the stroma.
2023-06-04 | GSE205473 | GEO
Project description:TRIM28 interacts with PGR and ESR1 in both human and mouse uterus to modulate estrogen and progesterone signaling. Knocking down of TRIM28 in the human endometrial stromal cells imparied decidualization in vitro. Deletion of TRIM28 from mouse uterus disrupted uterine stromal decidualization leading to infertility. Addtionally, TRIM28 deletion caused abnormal accumulation of TRIM28 postive and PGR negative cells in the stroma.
2023-06-04 | GSE205476 | GEO
Project description:TRIM28 interacts with PGR and ESR1 in both human and mouse uterus to modulate estrogen and progesterone signaling. Knocking down of TRIM28 in the human endometrial stromal cells imparied decidualization in vitro. Deletion of TRIM28 from mouse uterus disrupted uterine stromal decidualization leading to infertility. Addtionally, TRIM28 deletion caused abnormal accumulation of TRIM28 postive and PGR negative cells in the stroma.
2023-06-04 | GSE205475 | GEO
Project description:The identity, renewal, and multipotency of stem cells are controlled by epigenetic mechanisms. DNA methylation and trimethylation on histone H3K9 (H3K9me3) are two epigenetic marks that coordinate gene silencing in early embryogenesis. Yet whether they also play a role in regulating somatic stem cell activities governing organogenesis, particularly in the skeletal system, is unknown. Here we show that chromatin silencing, established by TRIM28 (aka. KAP1 and TIF1β) via DNA methylation and H3K9me3 during early organogenesis is crucial for skeletal development. Loss of TRIM28 in skeletal stem cells unsilences the promoter and two previously uncharacterized enhancers of the Grem1 gene, leading to GREM1 hyperexpression, which further activates AKT/mTORC1 signaling to promote skeletal stem cell renewal while restricting osteogenesis and chondrogenesis. Notably, loss of Trim28 in the growth plate also leads to the emergence of a novel stem cell cluster with neural crest cell properties and a distinctive neurogenic tendency. These collectively result in a wide range of skeletal abnormalities. Taken together, our data suggest that TRIM28 coordinates methylation of DNA and histone H3K9 to safeguard the identity and fate determination of skeletal stem cells by epigenetically silencing the GREM1/AKT/mTORC1 signaling axis.
2023-04-14 | GSE202056 | GEO