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Research Article

Reduced Expression of the Cell Cycle Regulator p27Kip1 within the Invasion Front of Renal Cell Carcinomas Proved to be a Significant Marker for Disease-specific Survival

A.S. MERSEBURGER, E. VON DER HEYDE, A. KOBIERSKI, U. WEGENER, M. MENGEL, U. JONAS, J. SERTH and M. KUCZYK
Cancer Genomics & Proteomics May 2006, 3 (3-4) 239-244;
A.S. MERSEBURGER
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E. VON DER HEYDE
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A. KOBIERSKI
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U. WEGENER
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M. MENGEL
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U. JONAS
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J. SERTH
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M. KUCZYK
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  • For correspondence: Markus.Kuczyk@med.uni-tuebingen.de
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Abstract

Background: The expression of the negative cell cycle regulator p27Kip1 is frequently found to be deregulated in various human cancer types. Whether the expression of p27Kip1 can be used as a prognostic marker for renal cell cancer patients still remains to be clarified. Therefore, in the present investigation the expression of protein within different tissue areas obtained from renal cell carcinomas, their invasion front and corresponding histologically benign renal parenchyma was determined and statistically correlated with several tumor and patient characteristics including the disease-specific long-term survival following surgical treatment. Patients and Methods: For analysis of p27Kip1 expression in 420 tumor nephrectomy specimens obtained from 420 consecutively included patients, tissue microarrays were used comprising 1260 tissue samples each obtained from the tumor itself, the invasive front as well as the non-malignant surrounding parenchyma. A sufficient follow-up after surgical therapy was available in 251 cases In total, 88 out of 251 patients (35%) had died from tumor progression after a median follow-up of 138 (36-240) months. Results: In univariate survival analysis, decreased expression of p27Kip1 within tissue cores obtained from the invasion front was significantly correlated with the patients' disease-specific long-term survival (p=0.02, log rank test). In contrast, expression of p27Kip1 within the primary tumors was not identified to reveal any prognostically important information. In Cox regression analysis, histological stage and grade (p<0.01), the presence of regional lymph node (p<0.01) or distant metastases at the time of surgery (p<0.01) as well as decreased expression of p27Kip1 (p=0.04) within the invasion front tissue samples independently predicted the disease-specific long-term survival following surgery. Conclusion: Our analysis demonstrated that p27Kip1 is heterogeneously expressed in renal cell carcinomas. Moreover, the results of the present study supports the prognostic value of p27Kip1 protein expression for patients diagnosed with renal cell carcinoma.

  • Renal cell cancer
  • p27Kip1 protein
  • prognosis
  • invasion front

Footnotes

    • Received April 4, 2006.
    • Accepted April 27, 2006.
  • Copyright© 2006 International Institute of Anticaner Research (Dr. John G. Delinassios), All rights reserved
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Cancer Genomics - Proteomics: 3 (3-4)
Cancer Genomics & Proteomics
Vol. 3, Issue 3-4
May-August 2006
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Reduced Expression of the Cell Cycle Regulator p27Kip1 within the Invasion Front of Renal Cell Carcinomas Proved to be a Significant Marker for Disease-specific Survival
A.S. MERSEBURGER, E. VON DER HEYDE, A. KOBIERSKI, U. WEGENER, M. MENGEL, U. JONAS, J. SERTH, M. KUCZYK
Cancer Genomics & Proteomics May 2006, 3 (3-4) 239-244;

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Reduced Expression of the Cell Cycle Regulator p27Kip1 within the Invasion Front of Renal Cell Carcinomas Proved to be a Significant Marker for Disease-specific Survival
A.S. MERSEBURGER, E. VON DER HEYDE, A. KOBIERSKI, U. WEGENER, M. MENGEL, U. JONAS, J. SERTH, M. KUCZYK
Cancer Genomics & Proteomics May 2006, 3 (3-4) 239-244;
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