Project description:Interventions: Phase I Screening and fecal DNA methylation test group:N/A
Primary outcome(s): Detection rate of fecal DNA methylation test in colorectal cancer and precancerous lesions
Study Design: Cross-sectional
Project description:Raw .m data files of LC/MS data of quantitative measurement of the changes in DNA methylation in response to nutrient limitation in WT and dam(-) E coli.
Project description:This is a comparative study. This study is to compare the diagnostic sensitivity between circulating tumor DNA methylation and carcinoembryonic antigen in detecting colorectal cancer. There are two steps in this study. Firstly, the diagnostic model is established based on tumor-specific plasma circulating tumor DNA methylation markers. Secondly, the sensitivity, specificity and accuracy of plasma circulating tumor DNA methylation are compared with that of carcinoembryonic antigen in detecting colorectal cancer.
Project description:This study will take progression-free survival and overall survival as the main evaluation indexes, to evaluate the Efficacy of Jianpi Huatan Decoction in the Treatment of Advanced Colorectal Cancer. Decision Trees and Discriminant Analysis will be used to analyze the characteristics of dominant population combined with clinical data of patients. DNA methylation of the subjects will be detected to study the methylation characteristics of the preponderant population of Jianpi Huatan Decoction.
Project description:Methylation of cytosines (5meC) is a widespread heritable DNA modification. During mammalian development, two global demethylation events are followed by waves of de novo DNA methylation. In vivo mechanisms of DNA methylation establishment are largely uncharacterized. Here we use Saccharomyces cerevisiae as a system lacking DNA methylation to define the chromatin features influencing the activity of the murine DNMT3B. Our data demonstrate that DNMT3B and H3K4 methylation are mutually exclusive and that DNMT3B is co-localized with H3K36 methylated regions. In support of this observation, DNA methylation analysis in yeast strains without Set1 and Set2 show an increase of relative 5meC levels at the TSS and a decrease in the gene-body, respectively. We extend our observation to the murine male germline, where H3K4me3 is strongly anti-correlated while H3K36me3 correlates with accelerated DNA methylation. These results show the importance of H3K36 methylation for gene-body DNA methylation in vivo. Collecting Yeast Whole Genome Bisulfite Sequencing Data
Project description:Lifecycle progression of the malaria parasite Plasmodium falciparum requires a finely tuned regulation of gene expression including histone methylation. The histone methyltransferase PfSET10 was previously identified as a histone H3 lysine K4 methyltransferase involved in var gene regulation, making it a prominent antimalarial target. We here investigated the role of PfSET10 in the P. falciparum blood stages in more detail, using tagged PfSET10-knockout (KO) and -knockdown (KD) lines. We demonstrated a nuclear localization of PfSET10 in the P. falciparum blood stages with peak protein levels in schizonts. PfSET10 deficiency resulted in reduced intraerythrocytic growth, but had no effect on gametocyte formation. When the PfSET10-KO line was screened for histone methylation variations, lack of PfSET10 rendered the parasites unable to mark H3K18me1, while no significant changes in the H3K4 methylation status were observed. Comparative transcriptomic profiling of PfSET10-KO schizonts demonstrated the up-regulation of transcripts particularly encoding proteins of erythrocyte invasion and multi gene family proteins, suggesting a suppressive function of the histone methylation mark. TurboID coupled with mass spectrometry further revealed an extensive nuclear PfSET10 interaction network with roles in transcriptional regulation, DNA replication and repair, chromatin remodeling and mRNA processing. Main interactors of PfSET10 included ApiAP2 transcription factors, epigenetic regulators, mediators of RNA polymerase II and DNA replication licensing factors. The combined data pinpoint PfSET10 as a histone H3 lysine K18 methyltransferase regulating DNA and RNA metabolic processes important for intraerythrocytic development of P. falciparum.