Volume 129, Issue 5 pp. 1096-1104
Cancer Genetics

Germline polymorphisms in genes involved in the CD44 signaling pathway are associated with clinical outcome in localized gastric adenocarcinoma

Thomas Winder

Thomas Winder

Division of Medical Oncology, University of Southern California/Norris Comprehensive Cancer Center, Keck School of Medicine, Los Angeles, CA

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Yan Ning

Yan Ning

Division of Medical Oncology, University of Southern California/Norris Comprehensive Cancer Center, Keck School of Medicine, Los Angeles, CA

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Dongyun Yang

Dongyun Yang

Department of Preventive Medicine, University of Southern California/Norris Comprehensive Cancer Center, Keck School of Medicine, Los Angeles, CA

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Wu Zhang

Wu Zhang

Division of Medical Oncology, University of Southern California/Norris Comprehensive Cancer Center, Keck School of Medicine, Los Angeles, CA

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Derek G Power

Derek G Power

Gastrointestinal Oncology Service, Memorial Sloan-Kettering Cancer Center, Cornell University, New York, NY

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Pierre Bohanes

Pierre Bohanes

Division of Medical Oncology, University of Southern California/Norris Comprehensive Cancer Center, Keck School of Medicine, Los Angeles, CA

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Armin Gerger

Armin Gerger

Division of Medical Oncology, University of Southern California/Norris Comprehensive Cancer Center, Keck School of Medicine, Los Angeles, CA

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Peter M. Wilson

Peter M. Wilson

Department of Pathology, University of Southern California/Norris Comprehensive Cancer Center, Keck School of Medicine, Los Angeles, CA

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Georg Lurje

Georg Lurje

Division of Medical Oncology, University of Southern California/Norris Comprehensive Cancer Center, Keck School of Medicine, Los Angeles, CA

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Laura H Tang

Laura H Tang

Department of Pathology, Memorial Sloan-Kettering Cancer Center, Cornell University, New York, NY

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Manish Shah

Manish Shah

Gastrointestinal Oncology Service, Memorial Sloan-Kettering Cancer Center, Cornell University, New York, NY

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Heinz-Josef Lenz

Corresponding Author

Heinz-Josef Lenz

Division of Medical Oncology, University of Southern California/Norris Comprehensive Cancer Center, Keck School of Medicine, Los Angeles, CA

Department of Preventive Medicine, University of Southern California/Norris Comprehensive Cancer Center, Keck School of Medicine, Los Angeles, CA

Tel.: +1-323-865-3967, Fax: +1-323-865-0061

Sharon A. Carpenter Laboratory, Division of Medical Oncology, University of Southern California, Norris Comprehensive Cancer Center, Keck School of Medicine, 1441 Eastlake Avenue, Los Angeles, CA 90033, USASearch for more papers by this author
First published: 23 November 2010
Citations: 25

This work was done in memory of David Donaldson

This paper was presented at 2010 Gastrointestinal Cancers Symposium (oral presentation General Session II), ASCO 2010 (abstract #4047)

Abstract

The cluster of differentiation 44 (CD44) signaling pathway is crucial in cancer-cell growth, invasion, proliferation and metastasis. CD44 is a transmembrane receptor for hyaluronan and osteopontin, and has recently attracted attention as a gastric cancer stem cell marker. Previous studies showed that polymorphisms in the CD44 gene can influence both human cancer survival and determine cellular response to cytotoxic chemotherapeutics. In addition, CD44 protein overexpression has been associated with poor prognosis in gastric adenocarcinoma (GA). We tested the hypothesis whether polymorphisms involved in the CD44 pathway will predict clinical outcome in patients with localized GA. Either blood or formalin-fixed paraffin-embedded (FFPE) tissues were obtained from 137 patients with localized GA at University of Southern California and Memorial Sloan-Kettering Cancer Center medical facilities. DNA was isolated and polymorphisms within the CD44 pathway were determined by PCR-RFLP technique. In univariate analysis CD44 rs187116 and CD44 rs7116432 were significantly associated with time to tumor recurrence (TTR) and overall survival (OS). After adjusting for covariates, patients harboring at least one G allele of CD44 rs187116 remained significantly associated with TTR (adjusted p = 0.009) and OS (adjusted p = 0.045). Further, patients harboring CD44 T-A haplotype were at the lowest risk of developing tumor recurrence (HR: 0.255; 95% CI: 0.11–0.591; adjusted p = 0.001) and death (HR 0.198; 95% CI: 0.07–0.563; adjusted p = 0.002). These results provide the first evidence that CD44 polymorphisms predict clinical outcome in patients with localized GA. This may help to identify localized GA patients at high risk for tumor recurrence.

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