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01-02-2008 | Hepatic and Pancreatic Tumors

Prognostic Significance of the Immediate Early Response Gene X-1 (IEX-1) Expression in Pancreatic Cancer

Authors: Tetsuro Sasada, MD, PhD, Koichi Azuma, MD, PhD, Tatsuya Hirai, Hiroki Hashida, MD, PhD, Michiyuki Kanai, MD, PhD, Takashi Yanagawa, PhD, Arimichi Takabayashi, MD, PhD

Published in: Annals of Surgical Oncology | Issue 2/2008

Abstract

Background

The immediate early response gene X-1 (IEX-1) is a stress-inducible protein that is involved in the regulation of cell proliferation and apoptosis. The aim of this study was to evaluate the prognostic significance of IEX-1 expression in pancreatic cancer.

Methods

IEX-1 protein expression was examined on paraffin-embedded specimens from 78 patients with pancreatic ductal adenocarcinoma using immunohistochemistry. The relationships between the IEX-1 expression and other clinicopathological parameters and patient survival were evaluated. A similar analysis was conducted in a subgroup of 48 patients, who underwent a macroscopically curative resection with detailed information on the pathological findings.

Results

Among 78 pancreatic cancer patients, 41 patients (53%) were positive for IEX-1 staining. In a multivariate analysis, curative operation (P < .001), pathological stage I–III (P = .001), and positive IEX-1 expression (P = .002) were significantly favorable factors for survival. In a subgroup of 48 patients undergoing a macroscopically curative surgery, IEX-1 expression was positive in 28 patients (58%). A significant negative correlation was observed between the IEX-1 expression and serosal (P = .032) or arterial (P = .040) invasion of tumors. A multivariate analysis demonstrated limited local invasion (pT1-3, P = .021), negative lymph node involvement (pN0, P < .001), and positive IEX-1 expression (P = .004) to be significantly favorable factors for survival.

Conclusions

The positive IEX-1 expression in tumor tissues may be associated with a better prognosis in pancreatic cancer. An immunohistochemical assessment of IEX-1 expression may therefore be helpful for predicting patient prognosis in this disease.

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Title: Prognostic Significance of the Immediate Early Response Gene X-1 (IEX-1) Expression in Pancreatic Cancer
Authors: Tetsuro Sasada, MD, PhD
Koichi Azuma, MD, PhD
Tatsuya Hirai
Hiroki Hashida, MD, PhD
Michiyuki Kanai, MD, PhD
Takashi Yanagawa, PhD
Arimichi Takabayashi, MD, PhD
Publication date: 01-02-2008
Publisher: Springer-Verlag
Published in: Annals of Surgical Oncology / Issue 2/2008
Print ISSN: 1068-9265
Electronic ISSN: 1534-4681
DOI: https://doi.org/10.1245/s10434-007-9669-0

At a glance: The ONWARDS insulin icodec trials

Springer Medicine

Prognostic Significance of the Immediate Early Response Gene X-1 (IEX-1) Expression in Pancreatic Cancer

Abstract

Background

Methods

Results

Conclusions

At a glance: The ONWARDS insulin icodec trials

Springer Medicine

Abstract

Background

Methods

Results

Conclusions

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