1 Torre LA,Bray F,Siegel RL,et al.Global cancer statistics,2012[J].CA Cancer J Clin,2015,65(2):87-108. 2 Chen W,Zheng R,Baade PD,et al.Cancer statistics in China,2015[J].CA Cancer J Clin,2016,66(2):115-132. 3 Cohen DJ.An expert opinion on esophageal cancer therapy[J].Exp Opin Pharmacother,2011,12(2):225-239. 4 Lote H,Cafferkey C,Chau I.PD-1 and PD-L1 blockade in gastrointestinal malignancies.[J].Cancer Treat Rev,2015,41(10):893-903. 5 Lim JS,Sundar R,Chénardpoirier M,et al.Emerging biomarkers for PD-1 pathway cancer therapy[J].Biomark Med,2017,11(1):53-67. 6 Leng C,Li Y,Qin J,et al.Relationship between expression of PD-L1 and PD-L2 on esophageal squamous cell carcinoma and the antitumor effects of CD8+T cells[J].Oncol Rep,2015,35(2):699. 7 Yamazaki T,Akiba H,Iwai H,et al.Expression of programmed death 1 ligands by murine T cells and APC[J].J Immunol,2002,169(10):5538-5545. 8 Barber DL,Wherry EJ,Masopust D,et al.Restoring function in exhausted CD8 T cells during chronic viral infection[J].Nature,2006,439(7077):682-687. 9 Song X,Liu J,Lu Y,et al.Overexpression of B7-H1 correlates with malignant cell proliferation in pancreatic cancer[J].Oncol Rep,2014,31(3):1191-1198. 10 Azuma T,Yao S,Zhu G,et al.B7-H1 is a ubiquitous antiapoptotic receptor on cancer cells[J].Blood,2008,111(7):3635-3643. 11 Ghiotto M,Gauthier L,Serriari N,et al.PD-L1 and PD-L2 differ in their molecular mechanisms of interaction with PD-1[J].Int Immunol,2010,22(8):651-660. 12 Parry RV,Chemnitz JM,Frauwirth KA,et al.CTLA-4 and PD-1 receptors inhibit T-cell activation by distinct mechanisms[J].Mol Cell Biol,2005,25(11):9543-9553. 13 Patsoukis N,Brown J,Petkova V,et al.Selective effects of PD-1 on Akt and Ras pathways regulate molecular components of the cell cycle and inhibit T cell proliferation[J].Sci Signal,2012,5(230):1755-1762. 14 Ohaegbulam KC,Assal A,Lazar-Molnar E,et al.Human cancer immunotherapy with antibodies to the PD-1 and PD-L1 pathway[J].Trends Mol Med,2015,21(1):24-33. 15 Pauken KE,Wherry EJ,John E.Overcoming T cell exhaustion in infection and cancer[J].Trends Immunol,2015,36(4):265-276. 16 Spranger S,Spaapen RM,Zha Y,et al.Up-regulation of PD-L1,IDO,and Tregs in the melanoma tumor microenvironment is driven by CD8+T cells[J].Sci Transl Med,2013,5(200):2418-2419. 17 Akbay EA,Koyama S,Carretero J,et al.Activation of the PD-1 pathway contributes to immune escape in EGFR-driven lung tumors[J].Cancer Discov,2013,3(12):1355-1363. 18 Obeid JM,Erdag G,Smolkin ME,et al.PD-L1,PD-L2 and PD-1 expression in metastatic melanoma:Correlation with tumor-infiltrating immune cells and clinical outcome[J].Oncoimmunology,2016,5(11):e1235107. 19 Thompson RH,Dong H,Kwon ED.Implications of B7-H1 expression in clear cell carcinoma of the kidney for prognostication and therapy[J].Clin Cancer Res,2007,13(2 Pt 2):709-715. 20 Kim JW,Nam KH,Ahn SH,et al.Prognostic implications of immunosuppressive protein expression in tumors as well as immune cell infiltration within the tumor microenvironment in gastric cancer[J].Gastric Cancer,2016,19(1):1-11. 21 Feng Z,Xiang-Lei L,Hai-Tao W,et al.Programmed cell death 1 expression in esophageal squamous cell carcinoma and association with clinical characteristics[J].Indian J Cancer,2015,52(Suppl 3):176-178. 22 Chen K,Cheng G,Zhang F,et al.Prognostic significance of programmed death-1 and programmed death-ligand 1 expression in patients with esophageal squamous cell carcinoma[J].Oncotarget,2016,7(21):30772-30780. 23 Kim R,Keam B,Kwon D,et al.Programmed death ligand-1 expression and its prognostic role in esophageal squamous cell carcinoma[J].World J Gastroenterology,2016,22(37):8389-8397. 24 Bang YJ,Chung HC,Shankaran V,et al.Relationship between PD-L1 expression and clinical outcomes in patients(Pts)with advanced gastric cancer treated with the anti-PD-1 monoclonal antibody pembrolizumab(Pembro;MK-3475)in KEYNOTE-012[C].Chicago:ASCO,2015. 25 Jiang D,Song Q,Wang H,et al.Independent prognostic role of PD-L1expression in patients with esophageal squamous cell carcinoma[J].Oncotarget,2017,8(5):8315-8329. 26 Wang X,Teng F,Li K,et al.PD-L1 expression in human cancers and its association with clinical outcomes[J].Onco Targets Ther NLM,2016,9(11):5023-5039. 27 Pyo JS,Kang G,Kim JY.Prognostic role of PD-L1 in malignant solid tumors:a meta-analysis[J].Int J Biol Markers,2016,27(4):422-424. 28 Zheng H,Liu X,Zhang J,et al.Expression of PD-1 on CD4+T cells in peripheral blood associates with poor clinical outcome in non-small cell lung cancer[J].Oncotarget,2016,7(35):56233-56240. 29 黄海涛,张光波,李广斌,等.食管癌患者外周血PD-L1+CD14+HLA-DR-/low细胞的免疫抑制作用及临床意义[C].苏州:全国肿瘤生物治疗学术会议,2013. 30 Bang YJ,Van CE,Feyereislova A,et al.Trastuzumab in combination with chemotherapy versus chemotherapy alone for treatment of HER2-positive advanced gastric or gastro-oesophageal junction cancer(ToGA):a phase 3,open-label,randomised controlled trial[J].Lancet,2010,376(9742):687-697. 31 Fuchs CS,Tomasek J,Yong CJ,et al.Ramucirumab monotherapy for previously treated advanced gastric or gastro-oesophageal junction adenocarcinoma(REGARD):an international,randomised,multicentre,placebo-controlled,phase 3 trial[J].Lancet,2014,383(9911):31-39. 32 Le DT,Bendell JC,Calvo E,et al.Safety and activity of nivolumab monotherapy in advanced and metastatic(A/M)gastric or gastroesophageal junction cancer(GC/GEC):Results from the CheckMate-032 study[J].J Clin Onco,2016,54(1):59-68. 33 Doi T,Pihapaul SA,Jalal SI,et al.Pembrolizumab(MK-3475)for patients(pts)with advanced esophageal carcinoma:Preliminary results from KEYNOTE-028[J].J Clin Oncol,2015,120(1):114-118. |