Metformin use and survival outcomes in endometrial cancer: a systematic review and meta-analysis

Weimin Xie; Tianjia Li; Jing Yang; Mengmeng Shang; Ying Xiao; Qian Li; Jiaxin Yang

doi:10.18632/oncotarget.20388

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Meta-Analysis:

Metformin use and survival outcomes in endometrial cancer: a systematic review and meta-analysis

Weimin Xie, Tianjia Li, Jing Yang, Mengmeng Shang, Ying Xiao, Qian Li and Jiaxin Yang _

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Oncotarget. 2017; 8:73079-73086. https://doi.org/10.18632/oncotarget.20388

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Abstract

Weimin Xie1,*, Tianjia Li2,*, Jing Yang3, Mengmeng Shang4, Ying Xiao5, Qian Li6 and Jiaxin Yang1

1Department of Obstetrics and Gynecology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China

2Department of Vascular Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China

3Department of Obstetrics and Gynecology, Maternal and Child Health Care Hospital of Hunan Province, Changsha, China

4Department of Scientific Research, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China

5Department of Pathology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China

6Department of Endocrinology, Key Laboratory of Endocrinology, Ministry of Health, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China

*These authors contributed equally to this work

Correspondence to:

Jiaxin Yang, email: [email protected]

Keywords: metformin, endometrial cancer, survival outcomes, meta-analysis

Received: June 10, 2017 Accepted: August 04, 2017 Published: August 22, 2017

ABSTRACT

Previous studies have evaluated the effects of metformin use on survival outcomes in endometrial cancer, but their results are inconsistent. We conducted a systematic review and meta-analysis to provide a quantitative assessment of the drug’s effects based on available evidence. We searched PubMed, Embase, and the Cochrane Central Register of Controlled Trials to identify relevant studies that evaluated the association between metformin use on survival outcomes in endometrial cancer. Pooled hazard ratios (HRs) with 95% confidence intervals (CIs) were calculated to evaluate the association of metformin use with overall survival and with progression-free survival using a fixed-effects model. A total of nine studies involving 2,016 patients with endometrial cancer were identified. In a meta-analysis of eight studies involving 1,594 individuals, metformin use was associated with significant improvements in overall survival (HR, 0.51; 95% CI, 0.41 to 0.64). Metformin users similarly showed improved progression-free survival in a meta-analysis of two studies involving 632 individuals (HR, 0.63; 95% CI, 0.46 to 0.87). In conclusion, endometrial cancer patients who use metformin show improved overall survival and progression-free survival. Further studies are required to confirm the full potential effects of metformin use on survival outcomes in endometrial cancer.

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Meta-Analysis:

Metformin use and survival outcomes in endometrial cancer: a systematic review and meta-analysis

Abstract