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학술저널
저자정보
Sun Qi (Department of Pathology The Affiliated Drum Tower Hospital of Nanjing University Medical School Nan) Fu Yao (Department of Pathology The Affiliated Drum Tower Hospital of Nanjing University Medical School Nan) Chen Xiaobing (Department of Oncology The Affiliated Cancer Hospital of Zhengzhou University Henan Cancer Hospital) Li Lin (Department of Pathology The Affiliated Drum Tower Hospital of Nanjing University Medical School Nan) Wu Hongyan (Department of Pathology The Affiliated Drum Tower Hospital of Nanjing University Medical School Nan) Liu Yixuan (Department of Pathology School of Basic Medical Sciences and State Key Laboratory of Reproductive M) Xu Haojun (Department of Pathology School of Basic Medical Sciences and State Key Laboratory of Reproductive M) Zhou Guoren (Department of Oncology Jiangsu Cancer Hospital and The Affiliated Cancer Hospital of Nanjing Medica) Fan Xiangshan (Department of Pathology The Affiliated Drum Tower Hospital of Nanjing University Medical School Nan) Xia Hongping (Department of Pathology The Affiliated Drum Tower Hospital of Nanjing University Medical School Nan)
저널정보
거트앤리버 발행위원회 Gut and Liver Gut and Liver 제16권 제6호
발행연도
2022.11
수록면
875 - 891 (17page)
DOI
10.5009/gnl210359

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Background/Aims: Epstein-Barr virus-associated gastric cancers (EBVaGCs) have unique molecular and clinicopathological characteristics. The cyclic GMP-AMP synthase-stimulator of interferon genes (STING) pathway is recently recognized as the critical innate immunity against pathogens and tumors. STING is also a master regulator in the cancer-immunity cycle and targeting STING could synergize with existing immune-checkpoint therapies. However, the role of STING in GC, especially in EBVaGC, and its correlation with programmed death-ligand 1 (PD-L1) remain largely unclear. Methods: We collected 78 cases of EBVaGCs and 210 cases of EBV-negative GC (EBVnGC) from a total of 1,443 cases of GC analyzed by EBV-encoded small RNA in situ hybridization. We investigated STING and PD-L1 expression and their concomitant prognostic value in EBVaGCs and EBVnGCs using tissue microarray and immunohistochemistry. The effects of STING and PD-L1 expression on the overall survival of patients with EBVaGC or EBVnGC were assessed by univariate and multivariate analysis. Results: We found that both STING and PD-L1 exhibited significantly higher expression in the EBVaGCs than that in the EBVnGCs. The expression of STING was positively correlated with that of PD-L1 in EBVaGCs. Simultaneous negative expression of STING and PD-L1, and positive expression of STING were independent prognostic risk factors for EBVaGC and EBVnGC, respectively. Conclusions: This is the first prognostic retrospective study of STING and PD-L1 expression and the prognosis among EBVaGC and EBVnGC. The expression and prognostic value of STING and PD-L1 are different in the two types of GCs. STING and PD-L1 are promising prognostic biomarkers and therapeutic targets for EBVaGC and EBVnGC.

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