Predictive V16alue of Thymidylate Synthase Expression in Gastric Cancer: A Systematic Review with Meta-analysis

Hu, Hua-Bin; Kuang, Lei; Zeng, Xiao-Min; Li, Bin; Liu, En-Yi; Zhong, Mei-Zuo

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자료유형: 학술저널

저자정보: Hu, Hua-Bin (Department of Oncology, Xiangya Hospital of Central South University) Kuang, Lei (Department of Gastroenterology, Nanfang Hospital of Southern Medical University) Zeng, Xiao-Min (Department of Epidemiology and Statistics, School of Public Health of Central South University) Li, Bin (Department of Oncology, Xiangya Hospital of Central South University) Liu, En-Yi (Department of Oncology, Xiangya Hospital of Central South University) Zhong, Mei-Zuo (Department of Oncology, Xiangya Hospital of Central South University)

저널정보: 아시아태평양암예방학회 Asian Pacific journal of cancer prevention : APJCP Asian Pacific journal of cancer prevention : APJCP 제13권 제1호

발행연도: 2012.1

수록면: 261 - 267 (7page)

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Purpose: The relationship between thymidylate synthase (TS) expression and outcomes in gastric cancer (GC) patients remains controversial, although most studies reported poor survival and reduced response to fluoropyrimidine were related to high TS in tumors. We carried out a systematic review of the literature with meta-analysis to estimate the predictive value of TS expression from published studies. Methods: We indentified 24 studies analysing the outcome data in gastric cancer stratified by TS expression. Effect measures of outcome were hazard ratios (HRs) for overall survival (OS) and event-free survival (EFS), or the odds ratio (OR) for overall response rate (ORR). HRs and ORs from these eligible studies were pooled using random-effects meta-analysis. Results: Fifteen studies investigated outcomes in a total of 844 patients with advanced GC, and nine studies investigated outcomes in a total of 1,235 patients with localized GC undergoing adjuvant therapy. Meta-analysis of estimates showed high TS expression was significantly associated with poor OS in the advanced setting (HR: 1.43, 95%CI: 1.08 - 1.90), and poor EFS in the adjuvant setting (HR: 1.53, 95%CI: 1.01 - 2.32). Subgroup analysis demonstrated TS expression to haves even greater value in predicting OS, EFS and ORR in advanced GC patients treated with fluoropyrimidine monotherapy (HR for OS: 2.32, 95%CI: 1.53 - 3.50; HR for EFS: 1.76, 95%CI: 1.19 - 2.60; OR for ORR: 0.32, 95%CI: 0.11 - 0.95). Conclusion: High levels of TS expression were asssociated with a poorer OS for advanced GC patients compared with low levels. In the adjuvant setting, high TS expression was also associated with a worse EFS. Additional studies with consistent methodology are needed to define the precise predictive value of TS.

#Thymidylate synthase #gastric cancer #fluoropyrimidine #meta-analysis

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