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학술저널
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대한산부인과학회 Obstetrics & Gynecology Science Obstetrics & Gynecology Science 제63권 제3호
발행연도
2020.1
수록면
346 - 356 (11page)

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ObjectiveTo investigate the prognostic significance of programmed cell death ligand-1 (PD-L1) in ovarian cancer. MethodsPubMed, Embase, and Cochrane Library databases were searched to identify studies that examined the prognosticsignificance of immunohistochemically assessed PD-L1 expression in histologically confirmed ovarian cancer. Elevenstudies on PD-L1 expression involving 1,296 patients with ovarian cancer were included in this meta-analysis. Pooledhazard ratios (HRs) with corresponding 95% confidence intervals (CIs) were analyzed. Relationship between PDL1expression, and overall survival (OS) or progression-free survival (PFS) among patients with ovarian cancer wasassessed. Subgroup analysis was performed based on the race, histologic type, and tumor International Federation ofGynecology and Obstetrics stage to evaluate the source of heterogeneity. Begg’s Funnel plot and Egger’s linear testwere used to evaluate publication bias. Random-effects model was implemented when significant between-studyheterogeneity (I2>50%) was observed. ResultsWe found no correlation between PD-L1 expression, and OS (HR, 1.13; 95% CI, 0.95–1.36; I2=78%) or PFS (HR, 1.07;95% CI, 0.88–1.30; I2=75%) in ovarian cancer. Subgroup analyses showed that higher PD-L1 expression was associatedwith poor OS in non-Asian patients with ovarian cancer (HR, 1.26; 95% CI, 1.07–1.481; I2=59%). We found thatupregulated PD-L1 expression to be a positive predictor for OS in serous ovarian cancer (HR, 0.98; 95% CI, 0.76–1.26; I2=74%) and a negative predictor for OS in non-serous ovarian cancer (HR, 1.29; 95% CI, 1.03–1.61; I2=64%)Furthermore, high PD-L1 expression was found to be a negative predictor for PFS of patients with non-serous ovariancancer (HR, 1.12; 95% CI, 0.96–1.29; I2=37%). ConclusionOur meta-analysis suggests that PD-L1 expression is not associated with patient risk for ovarian cancer.

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