| 1. | Shojaei F, Singh M, Thompson JD, et al. Role of Bv8 in neutrophil-dependent angiogenesis in a transgenic model of cancer progression. Proc Natl Acad Sci U S A, 2008, 105(7): 2640-2645. | 
				                                                        
				                                                            
				                                                                | 2. | Bray F, Ferlay J, Soerjomataram I, et al. Global cancer statistics 2018: GLOBOCAN estimates of incidence and mortality worldwide for 36 cancers in 185 countries. CA Cancer J Clin, 2018, 68(6): 394-424. | 
				                                                        
				                                                            
				                                                                | 3. | Hidalgo M, Cascinu S, Kleeff J, et al. Addressing the challenges of pancreatic cancer: future directions for improving outcomes. Pancreatology, 2015, 15(1): 8-18. | 
				                                                        
				                                                            
				                                                                | 4. | Wen Z, Liao Q, Zhao J, et al. High expression of interleukin-22 and its receptor predicts poor prognosis in pancreatic ductal adenocarcinoma. Ann Surg Oncol, 2014, 21(1): 125-132. | 
				                                                        
				                                                            
				                                                                | 5. | Oberg HH, Wesch D, Kalyan S, et al. Regulatory interactions between neutrophils, tumor cells and T cells. Front Immunol, 2019, 10: 1690. | 
				                                                        
				                                                            
				                                                                | 6. | Dou H, Yan Z, Zhang M, et al. APRIL promotes non-small cell lung cancer growth and metastasis by targeting ERK1/2 signaling. Oncotarget, 2017, 8(65): 109289-109300. | 
				                                                        
				                                                            
				                                                                | 7. | Zhi X, Tao J, Xiang G, et al. APRIL induces cisplatin resistance in gastric cancer cells via activation of the NF-κB pathway. Cell Physiol Biochem, 2015, 35(2): 571-585. | 
				                                                        
				                                                            
				                                                                | 8. | Bat-Erdene U, Quan E, Chan K, et al. Neutrophil TLR4 and PKR are targets of breast cancer cell glycosaminoglycans and effectors of glycosaminoglycan-induced APRIL secretion. Oncogenesis, 2018, 7(6): 45. | 
				                                                        
				                                                            
				                                                                | 9. | Wen X, Jin T, Xu X. Imaging G protein-coupled receptor-mediated chemotaxis and its signaling events in neutrophil-like HL60 cells. J Vis Exp, 2016, 115: e54511. | 
				                                                        
				                                                            
				                                                                | 10. | Deer EL, González-Hernández J, Coursen JD, et al. Phenotype and genotype of pancreatic cancer cell lines. Pancreas, 2010, 39(4): 425-435. | 
				                                                        
				                                                            
				                                                                | 11. | Hahne M, Kataoka T, Schr?ter M, et al. APRIL, a new ligand of the tumor necrosis factor family, stimulates tumor cell growth. J Exp Med, 1998, 188(6): 1185-1190. | 
				                                                        
				                                                            
				                                                                | 12. | He B, Xu W, Santini PA, et al. Intestinal bacteria trigger T cell-independent immunoglobulin A(2) class switching by inducing epithelial-cell secretion of the cytokine APRIL. Immunity, 2007, 26(6): 812-826. | 
				                                                        
				                                                            
				                                                                | 13. | Litinskiy MB, Nardelli B, Hilbert DM, et al. DCs induce CD40-independent immunoglobulin class switching through BLyS and APRIL. Nat Immunol, 2002, 3(9): 822-829. | 
				                                                        
				                                                            
				                                                                | 14. | Gross JA, Johnston J, Mudri S, et al. TACI and BCMA are receptors for a TNF homologue implicated in B-cell autoimmune disease. Nature, 2000, 404(6781): 995-999. | 
				                                                        
				                                                            
				                                                                | 15. | Sakurai D, Kanno Y, Hase H, et al. TACI attenuates antibody production costimulated by BAFF-R and CD40. Eur J Immunol, 2007, 37(1): 110-118. | 
				                                                        
				                                                            
				                                                                | 16. | Salazar-Camarena DC, Ortíz-Lazareno P, Marín-Rosales M, et al. BAFF-R and TACI expression on CD3+ T cells: Interplay among BAFF, APRIL and T helper cytokines profile in systemic lupus erythematosus. Cytokine, 2019, 114: 115-127. | 
				                                                        
				                                                            
				                                                                | 17. | Takahara M, Nagato T, Nozaki Y, et al. A proliferation-inducing ligand (APRIL) induced hyper-production of IgA from tonsillar mononuclear cells in patients with IgA nephropathy. Cell Immunol, 2019, 341: 103925. | 
				                                                        
				                                                            
				                                                                | 18. | Sun B, Xia Z, Cai F, et al. APRIL is involved in the proliferation and metastasis of acute lymphoblastic leukemia cells. J Pediatr Hematol Oncol, 2018, 40(8): 588-593. | 
				                                                        
				                                                            
				                                                                | 19. | Kubo H, Murakami T, Matsuyama R, et al. Prognostic impact of the neutrophil-to-lymphocyte ratio in borderline resectable pancreatic ductal adenocarcinoma treated with neoadjuvant chemoradiotherapy followed by surgical resection. World J Surg, 2019, 43(12): 3153-3160. | 
				                                                        
				                                                            
				                                                                | 20. | Guo J, Wu M, Guo L, et al. Pretreatment blood neutrophil/lymphocyte ratio is associated with metastasis and predicts survival in patients with pancreatic cancer. Bull Cancer, 2018, 105(2): 146-154. | 
				                                                        
				                                                            
				                                                                | 21. | Sakamoto T, Saito H, Uchinaka EI, et al. The combination of neutrophil-to-lymphocyte ratio and serum carbohydrate antigen 19-9 level as a prognostic indicator in patients with recurrent pancreatic cancer. Anticancer Res, 2018, 38(9): 5497-5503. | 
				                                                        
				                                                            
				                                                                | 22. | Lee BM, Chung SY, Chang JS, et al. The neutrophil-lymphocyte ratio and platelet-lymphocyte ratio are prognostic factors in patients with locally advanced pancreatic cancer treated with chemoradiotherapy. Gut Liver, 2018, 12(3): 342-352. | 
				                                                        
				                                                            
				                                                                | 23. | Athens JW, Haab OP, Raab SO, et al. Leukokinetic studies. IV. The total blood, circulating and marginal granulocyte pools and the granulocyte turnover rate in normal subjects. J Clin Invest, 1961, 40: 989-995. | 
				                                                        
				                                                            
				                                                                | 24. | Zou W, Chu X, Cai C, et al. AKT-mediated regulation of polarization in differentiated human neutrophil-like HL-60 cells. Inflamm Res, 2012, 61(8): 853-862. |