title: Prognostic significance of the co-overexpression of fibroblast growth factor receptors 1, 2 and 4 in gastric cancer.
abstract: The overexpression of fibroblast growth factor receptor (FGFR) 2 is an established prognostic factor and treatment target in gastric cancer. However, the roles of other FGFRs have not been fully elucidated. In this study, we investigated the correlations of the expression of FGFR1-4 with clinicopathological characteristics and outcomes in gastric cancer. Tumor samples were obtained from 222 patients with gastric adenocarcinoma who underwent gastrectomy between 2003 and 2007. The expression of each FGFR was measured in the tumors by immunohistochemical analysis. The overexpression of FGFR1, FGFR2 or FGFR4 was found to be significantly associated with tumor progression, including depth of invasion, lymph node metastasis, pathological stage and distant metastasis or recurrent disease. Patients exhibiting overexpression of FGFR1, FGFR2 or FGFR4 had a significantly poorer disease-specific survival (DSS; P<0.001, P=0.008 and P<0.001, respectively). Moreover, the co-overexpression of all three FGFRs was significantly associated with a poorer DSS compared to the expression of none or only one of the FGFRs (P<0.001 and P=0.001, respectively) and it was found to be an independent prognostic factor (HR=1.71, 95% CI: 1.02-2.85, P=0.041). In conclusion, high expression of FGFR1, FGFR2 or FGFR4 was associated with tumor progression and poor survival in patients with gastric cancer. Similar to FGFR2, FGFR1 and FGFR4 may be considered as prognostic factors and treatment targets in gastric cancer.
authors.affiliation: Department of Surgical Oncology, Tokyo Medical and Dental University, Tokyo 113-8519, Japan.
authors.forename: Hideaki
authors.initials: H
authors.lastname: Murase
authors.affiliation: Department of Surgical Oncology, Tokyo Medical and Dental University, Tokyo 113-8519, Japan.
authors.forename: Mikito
authors.initials: M
authors.lastname: Inokuchi
authors.affiliation: Department of Translational Oncology, Tokyo Medical and Dental University, Tokyo 113-8519, Japan.
authors.forename: Yoko
authors.initials: Y
authors.lastname: Takagi
authors.affiliation: Department of Surgical Oncology, Tokyo Medical and Dental University, Tokyo 113-8519, Japan.
authors.forename: Keiji
authors.initials: K
authors.lastname: Kato
authors.affiliation: Department of Minimally Invasive Surgery, Tokyo Medical and Dental University, Tokyo 113-8519, Japan.
authors.forename: Kazuyuki
authors.initials: K
authors.lastname: Kojima
authors.affiliation: Department of Surgical Oncology, Tokyo Medical and Dental University, Tokyo 113-8519, Japan.
authors.forename: Kenichi
authors.initials: K
authors.lastname: Sugihara
keywords: fibroblast growth factor receptor; gastric cancer; immunohistochemical analysis