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Series GSE6462 Query DataSets for GSE6462
Status Public on Dec 09, 2006
Title MCF7 dose response
Organism Homo sapiens
Experiment type Expression profiling by array
Summary ErbB receptor ligands, epidermal growth factor (EGF) and heregulin (HRG), induce dose-dependent transient and sustained intracellular signaling, proliferation and differentiation of MCF-7 breast cancer cells, respectively. In an effort to delineate the ligand-specific cell determination mechanism, we investigated time-course gene expressions induced by EGF and HRG that induce distinct cellular phenotypes in MCF-7 cells. To analyze the effects of ligand dosage and time for the gene expression independently, we developed a statistical method for decomposing the expression profiles into the two effects. Our results indicated that signal transduction pathways devotedly convey quantitative properties of the dose-dependent activation of ErbB receptor to early transcription. The results also implied that moderate changes in the expression levels of numbers of genes, not the predominant regulation of a few specific genes, might cooperatively work at the early stage of the transcription for determining the cell fate. However, the EGF- and HRG-induced distinct signal durations resulted in the ligand-oriented biphasic induction of proteins after 20 min. The selected gene list and HRG-induced prolonged signaling suggested that transcriptional feedback to the intracellular signaling results in a graded to biphasic response in the cell determination process, and that each ErbB receptor is inextricably responsible for the control of amplitude and duration of cellular biochemical reactions.
Keywords: time course, dose response
Overall design MCF-7 human breast cancer cells were incubated from 5min to 90min after administration of different concentrations of the growth hormones (epidermal growth factor (EGF) and heregulin (HRG)). Control was set as growth hormone non-treated cells. For each growth hormone, one control was used.
Citation(s) 17142811
Submission date Dec 06, 2006
Last update date Dec 06, 2018
Contact name Mariko Okada
Organization name RIKEN RCAI
Lab Laboratory for Cellular Systems Modeling
Street address W518, 1-7-22, Suehiro-cho, Tsurumi-ku
City Yokohama
ZIP/Postal code 230-0045
Country Japan
Platforms (1)
GPL571 [HG-U133A_2] Affymetrix Human Genome U133A 2.0 Array
Samples (57)
GSM148516 MCF7_dose_control_for_EGF
GSM148517 MCF7_dose_control_for_HRG
GSM148518 MCF7_dose_EGF_0.1nM_5min
BioProject PRJNA98693

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Supplementary file Size Download File type/resource
GSE6462_RAW.tar 116.1 Mb (http)(custom) TAR (of CEL, EXP)

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