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TBC1D3 Associates with the Histone Lysine N-methyltransferase G9a to Affect the Promotion of Neural Progenitors and Cortical Expansion in an Epigenetic Way [ChIP-Seq]

ABSTRACT: we conducted chromotin Immunoprecipitation sequencing (ChIP-seq) using mouse cortical tissues from TBC1D3-transgenic mice and wild-typed mice

ORGANISM(S): Mus musculus

PROVIDER: GSE131080 | GEO | 2021/12/01

REPOSITORIES: GEO

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TBC1D3 Associates with the Histone Lysine N-methyltransferase G9a to Affect the Promotion of Neural Progenitors and Cortical Expansion in an Epigenetic Way

Project description:This SuperSeries is composed of the SubSeries listed below.

2021-12-01 | GSE131254 | GEO

TBC1D3 Associates with the Histone Lysine N-methyltransferase G9a to Affect the Promotion of Neural Progenitors and Cortical Expansion in an Epigenetic Way [RNA-Seq]

Project description:we conducted RNA sequencing using human cerebral organoids treated with TAT peptides

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TBC1D3 Associates with the Histone Lysine N-methyltransferase G9a to Affect the Promotion of Neural Progenitors and Cortical Expansion in an Epigenetic Way

Project description:TBC1D3 Associates with the Histone Lysine N-methyltransferase G9a to Affect the Promotion of Neural Progenitors and Cortical Expansion in an Epigenetic Way

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TBC1D3 suppression of the Histone Lysine N-methyltransferase G9a promotes the generation of neural progenitors and cortical expansion [ChIP-seq]

Project description:we conducted chromotin Immunoprecipitation sequencing (ChIP-seq) using human cerebral organoids treated with TAT-Scrambled (Short for TAT-Scr) with the sequence of YGRKKRRQRRR-FRVRYWFQGCHSEDPWR and TAT-465-481, a special peoptide designed for inhibition of TBC1D3, with the sequence of YGRKKRRQRRR-EGPWFRHYDFRQSCWVR.

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TBC1D3 Associates with the Histone Lysine N-methyltransferase G9a to Affect the Promotion of Neural Progenitors and Cortical Expansion in an Epigenetic Way [RNA-Seq]

Project description:TBC1D3 Associates with the Histone Lysine N-methyltransferase G9a to Affect the Promotion of Neural Progenitors and Cortical Expansion in an Epigenetic Way [RNA-Seq]

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TBC1D3 Associates with the Histone Lysine N-methyltransferase G9a to Affect the Promotion of Neural Progenitors and Cortical Expansion in an Epigenetic Way [ChIP-Seq]

Project description:TBC1D3 Associates with the Histone Lysine N-methyltransferase G9a to Affect the Promotion of Neural Progenitors and Cortical Expansion in an Epigenetic Way [ChIP-Seq]

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TBC1D3 promotes neural progenitor proliferation by suppressing the histone methyltransferase G9a.

Project description:Genomic changes during human linage evolution contribute to the expansion of the cerebral cortex to allow more advanced thought processes. The hominoid-specific gene TBC1D3 displays robust capacity of promoting the generation and proliferation of neural progenitors (NPs), which are thought to contribute to cortical expansion. However, the underlying mechanisms remain unclear. Here, we found that TBC1D3 interacts with G9a, a euchromatic histone lysine N-methyltransferase, which mediates dimethylation of histone 3 in lysine 9 (H3K9me2), a suppressive mark for gene expression. TBC1D3 displayed an inhibitory role in G9a's histone methyltransferase activity. Treatment with G9a inhibitor markedly increased NP proliferation and promoted human cerebral organoid expansion, mimicking the effects caused by TBC1D3 up-regulation. By contrast, blockade of TBC1D3/G9a interaction to disinhibit G9a caused up-regulation of H3K9me2, suppressed NP proliferation, and impaired organoid development. Together, this study has demonstrated a mechanism underlying the role of a hominoid-specific gene in promoting cortical expansion.

| S-EPMC7810367 | biostudies-literature

TBC1D3 suppression of the Histone Lysine N-methyltransferase G9a promotes the generation of neural progenitors and cortical expansion

Project description:TBC1D3 suppression of the Histone Lysine N-methyltransferase G9a promotes the generation of neural progenitors and cortical expansion

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Protein lysine methyltransferase G9a acts on non-histone targets.

Project description:By methylation of peptide arrays, we determined the specificity profile of the protein methyltransferase G9a. We show that it mostly recognizes an Arg-Lys sequence and that its activity is inhibited by methylation of the arginine residue. Using the specificity profile, we identified new non-histone protein targets of G9a, including CDYL1, WIZ, ACINUS and G9a (automethylation), as well as peptides derived from CSB. We demonstrate potential downstream signaling pathways for methylation of non-histone proteins.

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Lysine methyltransferase G9a is an important modulator of trained immunity.

Project description:ObjectivesHistone methyltransferase G9a, also known as Euchromatic Histone Lysine Methyltransferase 2 (EHMT2), mediates H3K9 methylation which is associated with transcriptional repression. It possesses immunomodulatory effects and is overexpressed in multiple types of cancer. In this study, we investigated the role of G9a in the induction of trained immunity, a de facto innate immune memory, and its effects in non-muscle-invasive bladder cancer (NMIBC) patients treated with intravesical Bacillus Calmette-Guérin (BCG).MethodsEHMT2 expression was assessed upon induction of trained immunity by RNA sequencing and Western blotting. G9a inhibitor BIX-01294 was used to investigate the effect on trained immunity responses in vitro. Subsequent cytokine production was measured by ELISA, epigenetic modifications were measured by ChIP-qPCR, Seahorse technology was used to measure metabolic changes, and a luminescence assay was used to measure ROS release. RNA sequencing was performed on BIX-01294-treated monocytes ex vivo.ResultsThe expression of EHMT2 mRNA and protein decreased in monocytes during induction of trained immunity. G9a inhibition by BIX-01294 induced trained immunity and amplified trained immunity responses evoked by various microbial ligands in vitro. This was accompanied by decreased H3K9me2 at the promoters of pro-inflammatory genes. G9a inhibition was also associated with amplified ex vivo trained immunity responses in circulating monocytes of NMIBC patients. Additionally, altered RNA expression of inflammatory genes in monocytes of NMIBC patients was observed upon ex vivo G9a inhibition. Furthermore, intravesical BCG therapy decreased H3K9me2 at the promoter of pro-inflammatory genes.ConclusionInhibition of G9a is important in the induction of trained immunity, and G9a may represent a novel therapeutic target in NMIBC patients.

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