Please note that we have stopped the regular imports of Gene Expression Omnibus (GEO) data into ArrayExpress. This may not be the latest version of this experiment.
E-GEOD-8602 - Transcription profiling of human amnion epithelial FL cells early genes induced by N-methyl-Na??-nitro-N-nitrosoguanidine
Submitted on 26 July 2007, released on 9 January 2009, last updated on 10 June 2011
The alkylating agent N-methyl-N’-nitro-N-nitrosoguanidine (MNNG) induces cellular DNA damages and other comprehensive alterations that lead to chromosomal aberrations, mutations, tumor initiations, and cell death. However, the molecular mechanism of MNNG-induced cellular stress remains unclear.We have genome-wide analyzed early transcriptional responses of human FL amnion epithelial cells after exposure to three relatively low doses of MNNG (0.2, 1.0, and 10.0µM),and differential gene expression profiles were obtained 4 h after exposure using oligonucleotide microarrays followed by validation with quantitative real-time RT-PCR. The results demonstrate that the MNNG-responsive genes are involved in multiple cellular biological processes including transcription regulation, signal transduction, cell cycle regulation, cytoskeleton organization, protein synthesis, immune response, metabolism, etc. The possible roles of these genes and their related pathways in MNNG-induced cellular responses were discussed. This study helps to draw the whole picture how cells respond to environmental chemical exposure via transcriptional regulation. Experiment Overall Design: Human amnion epithelial FL cells were exposed to vehicle control (dimethyl sulfoxide) and increasing doses(0.2, 1.0, and 10.0µM)of N-methyl-N’-nitro-N-nitrosoguanidine(MNNG), respectively. The transcriptomes of the three treatments were compared to that of the control, respectively, to test the hypothesis that a characterized differential expression profile would be generated by exposure to various doses of this genotoxic agent.
transcription profiling by array, unknown experiment type