Project description:SETD2 is the specific methyltransferase of H3K36me3. To obtain SETD2-dependent landscape of H3K36me3 in human genome, we performed ChIP sequencing in SETD2 silenced and control HepG2 cells.
Project description:Spermatogenesis is precisely cotrolled by complex gene expression programs and involves epigenetic reprogramming including histone modification and DNA methylation. Setd2 catalyzes the trimethylation of histone H3 Lys36 (H3K36me3) and plays key roles in embryonic stem cell differentiation and somatic cell development; however, its role in male germ cell development remains elusive. Here we demonstrate an essential role of Setd2 for spermiogenesis. We show that targeted knockout of Setd2 in germ cells causes aberrant spermiogenesis with acrosomal malformation before step 8 round spermatid stage, resulting in complete male infertile. Furthermore, we show a complete loss of H3K36me3 and a significant altered gene expression profile, including Acrbp1 and protamines, caused by Setd2 deficiency. Our findings reveal a previously underappreciated role of Setd2-dependent H3K36me3 for spermiogenesis and improved the understanding of epigenetic disorders underlying male infertility.
Project description:Setd2 is the specific methyltransferase of H3K36me3. To obtain Setd2-dependent landscape of H3K36me3 in mouse genome, we used mouse embryonic stem cells (mESCs) model with doxycycline (Dox)-induced Setd2 knockdown, and performed ChIP sequencing in mESCs with or without Dox treatment.
Project description:We performed RNA-seq of 293T cells post depletion and SETD2 or hnRNP L to compare their global transcriptome profile. We also looked at the distribution of the histone mark H3K36me3 in wild type 293T to correlate it with the observed transcriptome changes upon SETD2 and hnRNP L depletion. We rescued SETD2 knock out 293T cells with SETD2 FL (Full Length), FLΔSRI (FLwoSRI) and FLΔSHI (FLwoSHI) and performed H3K36me3 ChIP-Seq.
Project description:During the aging process, bone marrow mesenchymal stem cells (BMSCs) exhibit declined osteogenesis accompanied by excess adipogenesis, which will lead to osteoporosis. Here we report that the H3K36 trimethylation, catalyzed by histone methyltransferase SETD2 regulates lineage commitment of BMSCs. Deletion of Setd2 in mBMSCs, through conditional Cre expression driven by Prx1 promoter, resulted in bone loss and marrow adiposity. Loss of Setd2 in BMSCs in vitro facilitated differentiation propensity to adipocytes rather than to osteoblasts. Through conjoint analysis of RNA-seq and ChIP-seq data, we identified a SETD2 functional target gene, Lbp, on which H3K36me3 was enriched, and its expression was affected by Setd2 deficiency. Furthermore, overexpression of LBP could partially rescue the lack of osteogenesis and enhanced adipogenesis resulted from the absence of Setd2 in BMSCs. Further mechanism study demonstrated that the trimethylation level of H3K36 could regulate Lbp transcriptional initiation and elongation. These findings suggest that H3K36 trimethylation mediated by SETD2 could regulate the cell fate of mesenchymal stem cells in vitro and in vivo, indicating that the regulation of H3K36me3 level by targeting SETD2 and/or the administration of downstream LBP protein may represent potential therapeutic way for new treatment in metabolic bone diseases, such as osteoporosis.
Project description:We report the application of H3K36me3 ChIP sequencing in SETD2 genotyped samples Examination of H3K36me3 in SETD2 wild-type, mutant renal cell carcinoma and SETD2 isogenic cell lines
Project description:Our study aims to understand the H3K36me3 and H3K27me3 genome-wide alterations by analysing CHIP-seq data between setd2 wt and ko germinal center B cells, characterize the function of H3K36me3 methyltransferase setd2 in H3K36me3 itself and H3K27me3, further we aim to H3K27me3 from phf19 ,which is H3K27me3 regulator, WT and KO group to investigate the mechanism of H3K36me3 dependent H3K27me3 modification introduced by setd2.