当前位置： SCI文献检索 > BMC CANCER期刊下所有文献 > Prognostic influence of cyclooxygenase-2 protein and mRNA expression in node-negative breast cancer patients.

Prognostic influence of cyclooxygenase-2 protein and mRNA expression in node-negative breast cancer patients.

Abstract：

BACKGROUND:Cyclooxygenases (COX) play a key role in prostaglandin metabolism and are important for tumor development and progression. The aim of this study was to analyze the prognostic impact of COX-2 expression in a cohort of lymph node-negative breast cancer patients not treated in the adjuvant setting. METHODS:COX-2 expression was determined by immunohistochemistry (IHC) in tumor tissue of 193 node-negative breast cancer patients. Additionally, mRNA expression was determined in corresponding tumor samples using microarray based gene-expression data. Univariate and multivariate Cox regression analyses adjusted for age at diagnosis, tumor size, histological grade, human epithelial growth factor receptor 2 (HER2), estrogen receptor (ER) and progesterone receptor (PR) were performed to evaluate the association of both COX-2 protein and mRNA expression with survival. Survival rates were determined by the Kaplan-Meier method. Correlations between COX-2 expression and established prognostic factors were analyzed using the Chi-square test. A potential correlation between COX-2 protein expression and COX-2 mRNA expression was assessed utilizing the Kruscal-Wallis-H-test. RESULTS:COX-2 protein expression was positive in 24.9% of the breast cancer samples. Univariate analysis showed that COX-2 protein expression was associated with shorter disease-free survival (DFS) (P = 0.0001), metastasis-free survival (MFS) (P = 0.002) as well as breast cancer specific overall survival (OS) (P = 0.043). In multivariate analysis COX-2 expression retained its significance independent of established prognostic factors for shorter DFS (P < 0.001, HR = 2.767, 95% CI = 1.563-4.901) and for inferior MFS (P = 0.002, HR = 2.7, 95% CI = 1.469-5.263) but not for OS (P = 0.096, HR = 1.929, 95% CI = 0.889-4.187). In contrast, COX-2 mRNA expression was not related to survival and failed to show a correlation with protein expression (P = 0.410). CONCLUSIONS:The present findings support the hypothesis that COX-2 protein but not mRNA expression is associated with an unfavorable outcome in node-negative breast cancer.

journal_name

BMC Cancer

journal_title

BMC cancer

authors

Sicking I,Rommens K,Battista MJ,Böhm D,Gebhard S,Lebrecht A,Cotarelo C,Hoffmann G,Hengstler JG,Schmidt M

doi

10.1186/1471-2407-14-952

subject

Has Abstract

pub_date

2014-12-15 00:00:00

pages

952

issn

1471-2407

pii

1471-2407-14-952

journal_volume

pub_type

杂志文章

在线工具

Prognostic influence of cyclooxygenase-2 protein and mRNA expression in node-negative breast cancer patients.