Mining tissue microarray data to uncover combinations of biomarker expression patterns that improve intermediate staging and grading of clear cell renal cell cancer

Dahinden, Corinne; Ingold, Barbara; Wild, Peter; Boysen, Gunther; Luu, Van-Duc; Montani, Matteo; Kristiansen, Glen; Sulser, Tullio; Bühlmann, Peter; Moch, Holger; Schraml, Peter (2010). Mining tissue microarray data to uncover combinations of biomarker expression patterns that improve intermediate staging and grading of clear cell renal cell cancer. Clinical cancer research, 16(1), pp. 88-98. Philadelphia, Pa.: American Association for Cancer Research 10.1158/1078-0432.CCR-09-0260

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PURPOSE: Tumor stage and nuclear grade are the most important prognostic parameters of clear cell renal cell carcinoma (ccRCC). The progression risk of ccRCC remains difficult to predict particularly for tumors with organ-confined stage and intermediate differentiation grade. Elucidating molecular pathways deregulated in ccRCC may point to novel prognostic parameters that facilitate planning of therapeutic approaches. EXPERIMENTAL DESIGN: Using tissue microarrays, expression patterns of 15 different proteins were evaluated in over 800 ccRCC patients to analyze pathways reported to be physiologically controlled by the tumor suppressors von Hippel-Lindau protein and phosphatase and tensin homologue (PTEN). Tumor staging and grading were improved by performing variable selection using Cox regression and a recursive bootstrap elimination scheme. RESULTS: Patients with pT2 and pT3 tumors that were p27 and CAIX positive had a better outcome than those with all remaining marker combinations. A prolonged survival among patients with intermediate grade (grade 2) correlated with both nuclear p27 and cytoplasmic PTEN expression, as well as with inactive, nonphosphorylated ribosomal protein S6. By applying graphical log-linear modeling for over 700 ccRCC for which the molecular parameters were available, only a weak conditional dependence existed between the expression of p27, PTEN, CAIX, and p-S6, suggesting that the dysregulation of several independent pathways are crucial for tumor progression. CONCLUSIONS: The use of recursive bootstrap elimination, as well as graphical log-linear modeling for comprehensive tissue microarray (TMA) data analysis allows the unraveling of complex molecular contexts and may improve predictive evaluations for patients with advanced renal cancer.

Item Type:	Journal Article (Original Article)
Division/Institute:	04 Faculty of Medicine > Department of Haematology, Oncology, Infectious Diseases, Laboratory Medicine and Hospital Pharmacy (DOLS) > Institute for Immunology [discontinued]
UniBE Contributor:	Dahinden, Clemens A.
ISSN:	1078-0432
Publisher:	American Association for Cancer Research
Language:	English
Submitter:	Factscience Import
Date Deposited:	04 Oct 2013 14:07
Last Modified:	05 Dec 2022 14:00
Publisher DOI:	10.1158/1078-0432.CCR-09-0260
PubMed ID:	20028743
Web of Science ID:	000278404500010
URI:	https://boris.unibe.ch/id/eprint/296 (FactScience: 197439)