Project description:Yin Yang 1 (YY1) is a ubiquitous transcription factor belonging to the GLI-Kruppel class of zinc finger proteins regulating diverse biological processes including cell proliferation, development, DNA damage responses and also involved in carcinogenesis. The protein is involved in repressing and activating a diverse number of promoters.In order to study the role of the transcription factor YY1 in gastric cancer, transcriptome wide gene expression analysis was performed upon silencing the YY1 gene in gastric cancer cell line, AGS using Affymetrix Human Transcriptome 2.0 array. Transcriptome Analysis Console (TAC) Software was used for the analysis of differentially expressed genes between AGS_YY1_siRNA transfected and AGS_NTC_siRNA transfected cells.
Project description:This SuperSeries is composed of the following subset Series: GSE31784: Expression changes in Yy1 knock down mouse embryonic stem cells GSE31785: Yy1 occupancy of mouse ES cell genome Refer to individual Series
Project description:We have determined the global gene expression upon loss of function of the Yy1 transcription factor in mouse embryonic stem cells Total RNA was extracted from ES cells transiently transfected with yy1-specific or scrampled-control siRNA oligos 48 hr post-transfection.
Project description:Three transcription factors KLF5, GATA4 and GATA6 are recurrently amplified in multiple gastric cancer cohorts, representing one type of lineage-survival oncogenes in gastric cancer. ChIP-Seq analysis of these three factors in multiple cell lines revealed that significant number of genomic sites are co-occupied by KLF5 and GATA4 and/or GATA6. Integrative analysis of ChIP-Seq and gene expression identified several targets of the three transcription factors in both cell lines and primary tumors, including HNF4A. These results suggest that KLF5, GATA4 and GATA6 interact and co-operate to regulate HNF4A and other genes to promote tumorigenesis in gastric cancer. Gene expression profiling of KLF5, GATA4 and GATA6 knock down in YCC3/AGS/KATOIII cells