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• W2950752711 abstract "Objectives Positron emission tomography (PET) using 2-deoxy-2-[18F] fluoro-D-glucose (18F-FDG) is a clinically useful modality for cancer evaluation. The mechanism of 18F-FDG uptake within cancer cells involves the glucose transporter 1 (GLUT1) and hypoxia-inducible factor-1 α (HIF-1α). Although recent research has shown its clinical efficacy in small-cell lung cancer (SCLC), no suitable biomarker has been identified. We conducted a clinicopathological study to examine the relationship between tumor immunity and 18F-FDG uptake in patients with SCLC. Materials and methods Tumor sections were stained by immunohistochemistry for GLUT1, HIF-1α, PD-L1, CD4, CD8, and Foxp3. The relationship between clinicopathological features and 18F-FDG uptake was analyzed. Student’s t-test, χ2 test, non-parametric Spearman’s rank test, and Kaplan–Meier method were used to evaluate associations between the variables. Results A total of 98 patients 78 men and 20 women who underwent 18F-FDG PET, were enrolled in this study. PD-L1 was expressed in 36.7% (36/98) of all patients; this was significantly associated with GLUT1 expression (p = 0.04). The accumulation of 18F-FDG was significantly higher in patients with low CD8 and CD4 TILs than in those with high TILs (p = 0.03 and p = 0.01, respectively). The uptake of 18F-FDG was not significantly associated with the expression of either Foxp3 or PD-L1. Multivariate analysis demonstrated that advanced stage, poor ECOG-PS, and high SUVmax were independent predictors of poor OS. Among patients with limited-stage disease, multivariate analysis confirmed high PD-L1 expression and a high SUVmax to be independent predictors of poor OS. However, only ECOG-PS was found to be an independent predictor of poor OS among patients with extensive-stage tumors. Conclusion High SUVmax on 18F-FDG-PET is correlated with low expression of CD8(+) and CD4(+) TILs, but is an independent prognostic factor for OS, particularly in those with limited disease. Further studies are warranted to validate our findings." @default.
• W2950752711 created "2019-06-27" @default.
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• W2950752711 date "2019-08-01" @default.
• W2950752711 modified "2023-09-24" @default.
• W2950752711 title "Fluorodeoxyglucose uptake is associated with low tumor-infiltrating lymphocyte levels in patients with small cell lung cancer" @default.
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• W2950752711 doi "https://doi.org/10.1016/j.lungcan.2019.06.009" @default.
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