中文摘要
微生物与肿瘤之间的关系是目前国内外研究的热点之一。口腔是人体内最重要的微生物库之一,而口腔鳞癌是最常见的口腔颌面部肿瘤。前期研究已经发现口腔鳞癌组织表面和癌体组织中存在着特异性的细菌,但是已有的研究无法回答"特异性"的微生物是肿瘤形成后定植的还是它们与肿瘤的发生有关系。因此本项目拟结合临床研究,体外实验和动物实验,研究"唾液菌群-口腔粘膜生物膜-癌体菌群"与口腔鳞癌干细胞分化和肿瘤转移之间的关系,并探索口腔微生物参与肿瘤细胞与免疫防御的相互作用,利用生物信息学技术探索两者之间可能存在的生物学规律,进一步了解口腔微生态系对微环境因素的应变能力,同时也为口腔鳞癌的预防和早期检测寻找新的思路和途径。
英文摘要
The interaction of microorganism and tumor attracts great interests of investigators. Oral cavity is one of the most important "microorganism pools" of human body, and the incidence of oral squamous cell carcinoma (OSCC) ranks No 1 among craniofacial cancers. Previous studies have indicated that special bacteria were found on the cancer surface and in the cancer tissue. But it is unclear that bacteria simply represent later secondary colonizers or whether bacterial-host interactions have significant effects on carcinogenesis. In the present project, clinical investigation, animal study and in-vitro experiment will be designed to study the interaction between "saliva bacteria-biofilms on mucosa- bacteria in OSCC" and the differentiation or metastasis of cancer stem cell. We also want to find out whether the bacteria are involved in the immune defense of anti-OSCC. Then the bioinformatics will be applied to find out the possible biological principles between the bacteria and cancer in oral cavity. The results will help us to understand how the biofilm react to the changes of microenvironment. The oral biofilm might be a potential approach for the prevention and early diagnosis of OSCC.
结题摘要
微生物与肿瘤之间的关系是目前国内外研究的热点之一。口腔是人体内最重要的微生物库之一,而口腔鳞癌是最常见的口腔颌面部肿瘤。前期研究已经发现口腔鳞癌组织表面和癌体组织中存在着特异性的细菌,但是已有的研究无法回答“特异性”的微生物是肿瘤形成后定植的还是它们与肿瘤的发生有关系。因此本项目结合临床研究,体外实验和动物实验,研究“唾液菌群-口腔粘膜生物膜-癌体菌群”与口腔鳞癌发生和肿瘤转移之间的关系,并探索口腔微生物参与肿瘤细胞与免疫防御的相互作用,利用生物信息学技术探索两者之间可能存在的生物学规律,进一步了解口腔微生态系对微环境因素的应变能力,同时也为口腔鳞癌的预防和早期检测寻找新的思路和途径。本项目通过临床实验筛选出两种“特异性”的微生物,并针对这两种“特异性”的微生物,详细探究了其参与口腔鳞癌发生发展的具体机制以及与肿瘤细胞免疫防御的相互作用关系。
