Expression and prognostic significance of the polymeric immunoglobulin receptor in esophageal and gastric adenocarcinoma.
Ontology highlight
ABSTRACT: INTRODUCTION: The polymeric immunoglobulin receptor (PIGR) has been proposed to be a candidate prognostic biomarker in a few cancer forms, and one previous study reported that reduced PIGR expression signifies more aggressive tumours of the distal esophagus and gastroesophageal junction (GEJ). In the present study, we examined the expression, clinicopathological correlates and prognostic significance of PIGR expression in an extended cohort of adenocarcinoma of the upper gastrointestinal tract. MATERIALS AND METHODS: Immunohistochemical PIGR expression was examined in a consecutive cohort of patients with surgically resected, radio-chemonaive adenocarcinoma of the esophagus, GE-junction and stomach (n?=?173), including paired samples of benign-appearing squamous epithelium (n?=?51), gastric mucosa (n?=?114), Barrett's esophagus (BE) or intestinal metaplasia (IM) (n?=?57) and lymph node metastases (n?=?75). Non-parametric tests were applied to explore associations between PIGR expression in primary tumours and clinicopathological characteristics. Classification and regression tree analysis was applied for selection of prognostic cut-off. The impact of PIGR expression on overall survival (OS) and recurrence-free survival (RFS) was assessed by Kaplan-Meier analysis and hazard ratios (HR) calculated by adjusted and unadjusted Cox proportional hazards modelling. RESULTS: PIGR expression was significantly higher in intestinal metaplasia (BE or gastric IM) compared to normal tissues and cancer (p?
SUBMITTER: Fristedt R
PROVIDER: S-EPMC4021601 | biostudies-literature | 2014
REPOSITORIES: biostudies-literature
ACCESS DATA