抗菌治疗对兔颊VX-2鳞癌感染性微环境中树突状细胞的影响

摘要

目的:探索抗菌治疗对兔颊VX-2鳞癌感染性微环境中树突状细胞(dendritic cells,DCs)成熟及功能的影响.方法:瘤粒植入形成兔颊VX-2鳞癌后,附加机械创伤及高糖饮食获得该鳞癌的炎症模型,再分为3组(n=6),A组:颊癌炎症模型使用抗生素治疗3d;B组:颊癌炎症模型以生理盐水代替抗生素对照;C组:单纯颊癌不做处理.3d后收集各组肿瘤标本,制成匀浆,取上清液与正常兔外周血单核细胞共培养,流式细胞仪检测DCs表面分子HLA-DR、CD83、CD86的表达,混合淋巴细胞反应检测DCs刺激T细胞增殖的能力.结果:HLA-DR、CD83、CD86阳性率及刺激指数(stimulate index,SI)由高到低均分别为:C组＞A组＞B组(P＜0.05).结论:抗菌治疗有助于感染兔颊VX-2鳞癌微环境中树突状细胞的成熟及功能恢复.%Objective:To study the effects of antimicrobial therapy on the maturation and function of dendritic cells(DCs) in the infected microenvironment of rabbit buccal VX-2 squamous cell carcinoma.Methods:The inflammatory models were obtained by mechanical trauma and high sugar diet on the basis of rabbit buccal VX-2 squamous cell carcinoma models which were established by particle implantation of the tumor tissue.The model rabbits were divided into 3 groups (n =6).In group A the rabbits with buccal VX-2 squamous cell carcinoma and local inflammation were given antibiotics by gavage and intramuscular injection for 3 consecutive days;the rabbits in group B with buccal VX-2 squamous cell carcinoma and local inflammation were given normal saline by gavage and intramuscular injection;the rabbits in group C with tumor and without inflammation were given normal saline by gavage and intramuscular injection.The tumor specimens were collected 3 days after treatment,and made into tissue homogenate,supernatant was collected after centrifugation.Normal rabbit peripheral blood mononuclear cells were separated and co-cultured with the supernatant obtained from the 3 groups respectively.Expressions of DCs surface markers HLA-DR,CD83 and CD86 were detected by flow cytometry.the function of DCs was tested by mixed lymphocyte reaction.Results:The positive rate of HLA-DR,CD83,CD86 and stimulate index were group C ＞ group A ＞ group B (P ＜ 0.05).Conclusion:Antimicrobial therapy can promote the maturation and function of DCs in the infected microenvironment of rabbit buccal VX-2 squamous cell carcinoma.