Pathology & Oncology Research

, Volume 18, Issue 4, pp 783–792

RUNX3 Downregulation in Human Lung Adenocarcinoma is Independent of p53, EGFR or KRAS Status

  • Mohd Feroz Mohd Omar
  • Kosei Ito
  • Min En Nga
  • Ross Soo
  • Bee Keow Peh
  • Tuty Muliana Ismail
  • Bhavin Thakkar
  • Richie Soong
  • Yoshiaki Ito
  • Manuel Salto-Tellez
Research

DOI: 10.1007/s12253-011-9485-5

Cite this article as:
Omar, M.F.M., Ito, K., Nga, M.E. et al. Pathol. Oncol. Res. (2012) 18: 783. doi:10.1007/s12253-011-9485-5

Abstract

RUNX3 aberrations play a pivotal role in the oncogenesis of breast, gastric, colon, skin and lung tissues. The aim of this study was to characterize further the expression of RUNX3 in lung cancers. To achieve this, a lung cancer tissue microarray (TMA), frozen lung cancer tissues and lung cell lines were examined for RUNX3 expression by immunohistochemistry, while the TMA was also examined for EGFR and p53 expression. RUNX3 promoter methylation status, and EGFR and KRAS mutation status were also investigated. Inactivation of RUNX3 was observed in 70% of the adenocarcinoma samples, and this was associated with promoter hypermethylation but not biased to EGFR/KRAS mutations. Our results suggest a central role of RUNX3 downregulation in pulmonary adenocarcinoma, which may not be dependent of other established cancer-causing pathways and may have important diagnostic and screening implications.

Keywords

EGFR KRAS Lung adenocarcinoma p53 Promoter hypermethylation RUNX3 

Copyright information

© Arányi Lajos Foundation 2012

Authors and Affiliations

  • Mohd Feroz Mohd Omar
    • 1
    • 2
  • Kosei Ito
    • 3
  • Min En Nga
    • 4
  • Ross Soo
    • 1
    • 5
  • Bee Keow Peh
    • 1
    • 4
  • Tuty Muliana Ismail
    • 4
    • 6
  • Bhavin Thakkar
    • 1
  • Richie Soong
    • 1
    • 4
  • Yoshiaki Ito
    • 1
    • 2
  • Manuel Salto-Tellez
    • 1
    • 6
    • 7
  1. 1.Cancer Science Institute of SingaporeCentre for Translational Medicine, National University of SingaporeSingaporeSingapore
  2. 2.NUS Graduate School for Integrative Sciences & EngineeringNational University of SingaporeSingaporeSingapore
  3. 3.Nagasaki University Graduate School of Biomedical ScienceNagasakiJapan
  4. 4.Department of PathologyNational University HospitalSingaporeSingapore
  5. 5.Department of Hematology-OncologyNational University HospitalSingaporeSingapore
  6. 6.Diagnostic Molecular Oncology Centre, #03-06, Clinical Research Centre, MD 11National University of SingaporeSingaporeSingapore
  7. 7.Centre for Cancer Research and Cell BiologyQueen’s University BelfastBT9 7BL BelfastUnited Kingdom

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