TargetRx Atlas

MRNA basic information

  • mRNA ID:ENST00000239938
  • Gene Name:EGR1
  • mRNA database:Ensembl
  • mRNA expression :down-regulated
  • mRNA Method:RT-PCR
  • mRNA Pathway:NA
  • Evidence:validated
  • (mRNA-drug)

Drug basic information

  • Drug ID:DB00317 (APRD00997, DB07998)
  • Drug Name:Gefitinib
  • Drug Method:down-regulated the gene expression the gene expression

Disease basic infommation

  • Disease:bladder cancer
  • Tissue:cell lines (RT4 and RT112)

Other information

  • Title:hEGR1 is induced by EGF, inhibited by gefitinib in bladder cell lines and related to EGF receptor levels in bladder tumours
  • Journal:Br J Cancer
  • Published:2007
  • PubMed ID:17311025
  • Abstract:The effect of EGF and gefitinib on two EGFR-positive human bladder cancer cell lines has been investigated using array-based gene expression profiling. The most prominent transcript, increased up to 6.7-fold by EGF compared with controls in RT112 cells, was human early growth response protein 1 (hEGR1). This induction was prevented by gefitinib. The hEGR1 mRNA in EGF-treated samples was reduced in the presence of gefitinib, as was hEGR1 protein in cell lysates. In the RT4 cells, hEGR1 expression was halved in the presence of EGF and gefitinib in combination. In bladder tumour samples, there was a significant correlation between hEGR1 mRNA detected by RT-PCR and EGFR detected by ligand binding, (P=0.042). The induction by EGF of the hEGR1 gene, mRNA and protein in RT112 cells, and its inhibition by gefitinib, together with the detection of hEGR1 mRNA in bladder tumours, suggests that hEGR1 may be important in the EGFR growth-signalling pathway in bladder cancer and should be further investigated for its prognostic significance and as a potential therapeutic target.
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