Clinical significance of ApoE expression in human gastric cancer

Katsuya Sakashia, Fumiaki Tanaka, Xiang Zhang, Koshi Mimori, Yukio Kamohara, Hiroshi Inoue, Tetsuji Sawada, Kosei Hirakawa, Masaki Mori

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

ApoE plays a key role in various biological events. The aim of this study is to clarify its clinical significance in gastric cancer. We obtained paired clinical bulk samples of tumor tissue and corresponding normal tissue from 124 gastric cancer patients. To address ApoE mRNA expression clearly, we selected four samples, and differentially dissected gastric cancer and normal epithelium using laser microdissection (LMD) system. ApoE mRNA expression was examined by real-time reverse transcription (RT)-polymerase chain reaction (PCR). ApoE protein expression was assessed by immnunohistochemistry. The relationship between ApoE mRNA expression and clinicopathologic factors was statistically analyzed. RT-PCR assay for 124 bulk samples showed that ApoE mRNA expression was more highly expressed in gastric cancer tissue than in corresponding normal mucosa (p<0.0001). By RT-PCR assay of four LMD samples, ApoE mRNA was overexpressed in gastric cancer. Immunohistochemistry showed that ApoE was predominantly expressed in gastric cancer. Tumors with high ApoE mRNA expression showed deeper tumor invasion into the muscle layer (p<0.0001), the serosal layer (p<0.01), or more positive lymph node metastasis (p<0.05). When assessed by Kaplan- Meier analysis, patients with high ApoE expression tumor had a shorter survival than those with low ApoE expression tumor (p<0.05). Moreover, multivariate analysis indicated that high ApoE mRNA expression was an independent indicator for muscular invasion (p<0.01). ApoE is highly expressed in gastric cancer, contributing to shorter survival. In particular, ApoE was closely correlated with muscular invasion, and may be a possible biomarker predicting muscular invasion of gastric cancer.

Original languageEnglish
Pages (from-to)1313-1319
Number of pages7
JournalOncology reports
Volume20
Issue number6
DOIs
Publication statusPublished - Dec 1 2008

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Apolipoproteins E
Stomach Neoplasms
Messenger RNA
Reverse Transcription
Microdissection
Neoplasms
Polymerase Chain Reaction
Lasers
Survival
Kaplan-Meier Estimate
Mucous Membrane
Multivariate Analysis
Epithelium
Biomarkers
Lymph Nodes

All Science Journal Classification (ASJC) codes

  • Oncology
  • Cancer Research

Cite this

Clinical significance of ApoE expression in human gastric cancer. / Sakashia, Katsuya; Tanaka, Fumiaki; Zhang, Xiang; Mimori, Koshi; Kamohara, Yukio; Inoue, Hiroshi; Sawada, Tetsuji; Hirakawa, Kosei; Mori, Masaki.

In: Oncology reports, Vol. 20, No. 6, 01.12.2008, p. 1313-1319.

Research output: Contribution to journalArticle

Sakashia, K, Tanaka, F, Zhang, X, Mimori, K, Kamohara, Y, Inoue, H, Sawada, T, Hirakawa, K & Mori, M 2008, 'Clinical significance of ApoE expression in human gastric cancer', Oncology reports, vol. 20, no. 6, pp. 1313-1319. https://doi.org/10.3892/or_00000146
Sakashia K, Tanaka F, Zhang X, Mimori K, Kamohara Y, Inoue H et al. Clinical significance of ApoE expression in human gastric cancer. Oncology reports. 2008 Dec 1;20(6):1313-1319. https://doi.org/10.3892/or_00000146
Sakashia, Katsuya ; Tanaka, Fumiaki ; Zhang, Xiang ; Mimori, Koshi ; Kamohara, Yukio ; Inoue, Hiroshi ; Sawada, Tetsuji ; Hirakawa, Kosei ; Mori, Masaki. / Clinical significance of ApoE expression in human gastric cancer. In: Oncology reports. 2008 ; Vol. 20, No. 6. pp. 1313-1319.
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