Journal of Neuro-Oncology

, Volume 109, Issue 2, pp 219–227

E-cadherin as a predictive marker of brain metastasis in non-small-cell lung cancer, and its regulation by pioglitazone in a preclinical model

Authors

  • Jin Young Yoo
    • Department of PathologySt. Vincent’s Hospital, The Catholic University of Korea
    • Department of NeurosurgerySt. Vincent’s Hospital, The Catholic University of Korea
  • Jung Eun Lee
    • Department of NeurosurgerySt. Vincent’s Hospital, The Catholic University of Korea
  • Deog Gon Cho
    • Department of Thoracic SurgerySt. Vincent’s Hospital, The Catholic University of Korea
  • Hoon Kyo Kim
    • Department of Internal MedicineSt. Vincent’s Hospital, The Catholic University of Korea
  • Sung Hwan Kim
    • Department of Radiation OncologySt. Vincent’s Hospital, The Catholic University of Korea
  • Il Sup Kim
    • Department of NeurosurgerySt. Vincent’s Hospital, The Catholic University of Korea
  • Jae Taek Hong
    • Department of NeurosurgerySt. Vincent’s Hospital, The Catholic University of Korea
  • Jae Hoon Sung
    • Department of NeurosurgerySt. Vincent’s Hospital, The Catholic University of Korea
  • Byung Chul Son
    • Department of NeurosurgerySt. Vincent’s Hospital, The Catholic University of Korea
  • Sang Won Lee
    • Department of NeurosurgerySt. Vincent’s Hospital, The Catholic University of Korea
Laboratory Investigation

DOI: 10.1007/s11060-012-0890-8

Cite this article as:
Yoo, J.Y., Yang, S., Lee, J.E. et al. J Neurooncol (2012) 109: 219. doi:10.1007/s11060-012-0890-8

Abstract

It remains unclear whether patients with non-small-cell lung cancer (NSCLC) develop brain metastasis during or after standard therapy. We attempted to identify biological markers that predict brain metastasis, and investigated how to modulate expression of such markers. A case–control study of patients who were newly diagnosed with NSCLC and who had developed brain metastasis during follow-up was conducted between 2004 and 2009. These patients were compared with a control group of patients who had NSCLC but no evidence of brain metastasis. Immunohistochemical analysis of expression of Ki-67, p53, Bcl-2, Bax, vascular endothelial growth factor, epidermal growth factor receptor, caspase-3, and E-cadherin was conducted. The methylation status of the genes for O6-methylguanine-DNA-methyltransferase, tissue inhibitor of matrix metalloproteinase (TIMP)-2, TIMP-3, and death-associated protein-kinase was also determined, by use of a methylation-specific polymerase chain reaction. A significantly increased risk of developing brain metastasis was associated with the presence of primary tumors with low E-cadherin expression in patients with NSCLC. We also investigated the effects of pioglitazone, a peroxisome proliferator-activated receptor γ-activating drug, in tumor-bearing mouse models. We found that E-cadherin expression was proportional to pioglitazone exposure time. Interestingly, pioglitazone pretreatment before cancer cell inoculation prevented loss of E-cadherin expression and reduced expression of MMP9 and fibronectin, compared with the control group. E-cadherin expression could be a predictor of brain metastasis in patients with NSCLC. Preventive treatment with pioglitazone may be useful for modulating E-cadherin expression.

Keywords

Biomarker Brain metastasis NSCLC PPARγ Prevention E-cadherin

Supplementary material

11060_2012_890_MOESM1_ESM.doc (5.8 mb)
Supplementary material 1 (DOC 5929 kb)
11060_2012_890_MOESM2_ESM.doc (15 kb)
Supplementary material 2 (DOC 15 kb)

Copyright information

© Springer Science+Business Media, LLC. 2012