DNA Microarray Analysis of Immediate Response to EGF Treatment in Rat Schwannoma Cells

  • OH, Min-Kyu (Department of Chemical and Biological Engineering, Korea University) ;
  • Scoles, Daniel R. (Rose Moss Neurogenetics Laboratory for Parkinson and Related Diseases, CSMS Burns and Allen Research Institute, Division of Neurology, Cedars-Sinai Medical Center) ;
  • Pulst, Stefan-M. (Rose Moss Neurogenetics Laboratory for Parkinson and Related Diseases, CSMS Burns and Allen Research Institute, Division of Neurology, Cedars-Sinai Medical Center)
  • Published : 2005.10.31

Abstract

Epidermal growth factor (EGF) activates many intracellular effector molecules, which subsequently influence the expression levels of many genes involved in cell growth, apoptosis and signal transduction, etc. In this study, the early response of gene expressions due to EGF treatment was monitored using oligonucleotide DNA microarrays in rat schwannoma cell lines. An immunoblotting experiment showed the successful activation of EGF receptors and an effector protein, STAT5, due to EGF treatment. The microarray study showed that 35 genes were significantly induced and 2 were repressed within 60 min after the treatment. The list of induced genes included early growth response 1, suppressor of cytokine signaling 3, c-fos, interferon regulatory factor 1 and early growth response 2, etc. According to the microarray data, six of these were induced by more than 10-fold, and showed at least two different induction patterns, indicating complicated regulatory mechanisms in the EGF signal transduction.

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