Proteomics analysis of siRNA-mediated silencing of Wilms' tumor 1 in the MDA-MB-468 breast cancer cell line

Musleeha Chesor, Sittiruk Roytrakul, Potchanapond Graidist, Kanyanatt Kanokwiroon*

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

4 Citations (Scopus)


The Wilms' tumor 1 (WT1) gene encodes a zinc finger which appears to be a transcriptional activator or repressor for many genes involved in cell differentiation, growth and apoptosis. In order to determine the relationship between WT1 and related proteins, WT1 was silenced with small interfering RNA (siRNA) and the protein expression pattern was analyzed by proteomics analysis including one-dimensional gel electrophoresis (1-DE) and LC-MS/MS mass spectrometry. The results revealed that 14 proteins were expressed in WT1-silenced cells (siRNAWT1) and 12 proteins were expressed in the WT1-expressing cells (siRNAneg), respectively. These proteins may be classified by their functions in apoptosis, cell signaling, protein folding, gene expression, redox-regulation, transport, structural and unknown functions. Mitogaligin, an apoptosis-related molecule, was identified when WT1 was silenced while the proteins related to the signaling pathway were detected in both siRNAneg and siRNAWT1 but the type of proteins were different. For example, the IBtK protein and the SH2 domain-containing protein were present in siRNAWT1 conditions, while the platelet-derived growth factor receptor α (PDGFRA) and Rho guanine nucleotide exchange factor 1 (Rho-GEF 1) were expressed in siRNAneg. Of these, Rho-GEF was selected for validation by western blot analysis and demonstrated to be present only in the presence of WT1. In conclusion, WT1 is related to mitogaligin via EGFR and behaves as an anti-apoptotic molecule. Moreover, WT1 may be associated with PDGFRA and Rho-GEF 1 that activates proliferation in MDA-MB-468 cells.

Original languageEnglish
Pages (from-to)1754-1760
Number of pages7
JournalOncology Reports
Issue number4
Publication statusPublished - 1 Jan 2014


  • Mitogaligin
  • Platelet-derived growth factor receptor α
  • Proteomics
  • Rho guanine nucleotide exchange factor 1
  • SiRNA
  • Wilms' tumor 1

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