Journal of Cancer Research and Clinical Oncology

, Volume 134, Issue 12, pp 1363–1369

Microarray-based identification of CUB-domain containing protein 1 as a potential prognostic marker in conventional renal cell carcinoma

  • Yasuo Awakura
  • Eijiro Nakamura
  • Takeshi Takahashi
  • Hirokazu Kotani
  • Yoshiki Mikami
  • Tadashi Kadowaki
  • Akira Myoumoto
  • Hideo Akiyama
  • Noriyuki Ito
  • Toshiyuki Kamoto
  • Toshiaki Manabe
  • Hitoshi Nobumasa
  • Gozoh Tsujimoto
  • Osamu Ogawa
Original Paper

DOI: 10.1007/s00432-008-0412-4

Cite this article as:
Awakura, Y., Nakamura, E., Takahashi, T. et al. J Cancer Res Clin Oncol (2008) 134: 1363. doi:10.1007/s00432-008-0412-4

Abstract

Purpose

Renal cell carcinoma (RCC) is characterized by a variable and unpredictable clinical course. Thus, accurate prediction of the prognosis is important in clinical settings. We conducted microarray-based study to identify a novel prognostic marker in conventional RCC.

Patients and methods

The present study included the patients surgically treated at Kyoto University Hospital. Gene expression profiling of 39 samples was carried out to select candidate prognostic markers. Quantitative real-time PCR of 65 samples confirmed the microarray experiment results. Finally, we evaluated the significance of potential markers at their protein expression level by immunohistochemically analyzing 230 conventional RCC patients.

Results

Using expression profiling analysis, we identified 14 candidate genes whose expression levels predicted unfavorable disease-specific survival. Next, we examined the expression levels of nine candidate genes by quantitative real-time PCR and selected CUB-domain containing protein 1 (CDCP1) for further immunohistochemical analysis. Positive staining for CDCP1 inversely correlated with disease-specific and recurrence-free survivals. In multivariate analysis including clinical/pathological factors, CDCP1 staining was a significant predictor of disease-specific and recurrence-free survivals.

Conclusions

We identified CDCP1 as a potential prognostic marker for conventional RCC. Further studies might be required to confirm the prognostic value of CDCP1 and to understand its function in RCC progression.

Keywords

CDCP1 Microarray Prognosis Renal cell carcinoma 

Supplementary material

432_2008_412_MOESM1_ESM.tif (55 kb)
Fig. 1S. Survival curves for patients with conventional RCC in relation to the expression of 9 candidate genes. CDCP1 expression was significantly associated with prognosis (shown in the rounded rectangle) (TIFF 55 kb)
432_2008_412_MOESM2_ESM.xls (15 kb)
Table 1S. The sequences of primers used in the present study (XLS 15 kb)
432_2008_412_MOESM3_ESM.xls (18 kb)
Table 2S. Genes whose expression levels correlate with unfavorable prognosis in microarray experiment (XLS 17 kb)
432_2008_412_MOESM4_ESM.doc (24 kb)
Supplementary materials and methods (DOC 23 kb)

Copyright information

© Springer-Verlag 2008

Authors and Affiliations

  • Yasuo Awakura
    • 1
  • Eijiro Nakamura
    • 1
  • Takeshi Takahashi
    • 1
  • Hirokazu Kotani
    • 2
  • Yoshiki Mikami
    • 2
  • Tadashi Kadowaki
    • 3
  • Akira Myoumoto
    • 4
  • Hideo Akiyama
    • 4
  • Noriyuki Ito
    • 1
  • Toshiyuki Kamoto
    • 1
  • Toshiaki Manabe
    • 2
  • Hitoshi Nobumasa
    • 4
  • Gozoh Tsujimoto
    • 3
  • Osamu Ogawa
    • 1
  1. 1.Department of UrologyKyoto University Graduate School of MedicineKyotoJapan
  2. 2.Laboratory of Anatomic PathologyKyoto University HospitalKyotoJapan
  3. 3.Department of Genomic Drug Discovery ScienceKyoto University Graduate School of Pharmaceutical SciencesKyotoJapan
  4. 4.New Frontiers Research LaboratoriesToray Indutries Inc.KamakuraJapan

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