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An expression module of WIPF1-coexpressed genes identifies patients with favorable prognosis in three tumor types

By Eike Staub, Joern Groene, Maya Heinze, Detlev Mennerich, Stefan Roepcke, Irina Klaman, Bernd Hinzmann, Esmeralda Castanos-Velez, Christian Pilarsky, Benno Mann, Thomas Brümmendorf, Birgit Weber, Heinz-Johannes Buhr and André Rosenthal

Abstract

Wiskott–Aldrich syndrome (WAS) predisposes patients to leukemia and lymphoma. WAS is caused by mutations in the protein WASP which impair its interaction with the WIPF1 protein. Here, we aim to identify a module of WIPF1-coexpressed genes and to assess its use as a prognostic signature for colorectal cancer, glioma, and breast cancer patients. Two public colorectal cancer microarray data sets were used for discovery and validation of the WIPF1 co-expression module. Based on expression of the WIPF1 signature, we classified more than 400 additional tumors with microarray data from our own experiments or from publicly available data sets according to their WIPF1 signature expression. This allowed us to separate patient populations for colorectal cancers, breast cancers, and gliomas for which clinical characteristics like survival times and times to relapse were analyzed. Groups of colorectal cancer, breast cancer, and glioma patients with low expression of the WIPF1 co-expression module generally had a favorable prognosis. In addition, the majority of WIPF1 signature genes are individually correlated with disease outcome in different studies. Literature gene network analysis revealed that among WIPF1 co-expressed genes known direct transcriptional targets of c-myc, ESR1 and p53 are enriched. The mean expression profile of WIPF1 signature genes is correlated with the profile of a proliferation signature. The WIPF1 signature is the first microarray-based prognostic expression signature primarily developed for colorectal cancer that is instrumental in other tumor types: low expression of the WIPF1 module is associated with better prognosis

Topics: Original Article
Publisher: Springer-Verlag
OAI identifier: oai:pubmedcentral.nih.gov:2688022
Provided by: PubMed Central

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