目的:分析肥胖伴牙周感染小鼠体内B-1a细胞的表达变化.方法:建立饮食诱导型肥胖伴实验性牙周感染的小鼠模型,通过免疫组化和蛋白质印迹的方法检测小鼠颌骨和脾脏中CD5、抗Ⅰ型胶原(Col-Ⅰ)抗体、IL-10的蛋白表达量;实时定量PCR检测小鼠颌骨中CD5、抗Col-Ⅰ抗体、IL-10 的mRNA表达量.结果:牙周炎组颌骨中的CD5、IL-10、抗Col-Ⅰ抗体的蛋白和mRNA表达量均显著高于对照组(P<0.001);肥胖组脾脏中的CD5、IL-10、抗Col-Ⅰ抗体的蛋白表达量显著高于标准组(P<0.05);标准伴牙周真性结扎组脾脏中抗Col-Ⅰ抗体的表达量显著高于标准伴牙周假性结扎组(P<0.05).结论:B-1a细胞在肥胖与牙周炎的炎症早期被激活并存在一定的病理意义,这两种炎症状态并没有在病理机制上出现交叉影响.%Objective:To study the expression of B-1a cells in mice with obesity and periodontal infection.Methods:Mouse models of diet induced obesity combined with experimental periodontitis were established,the expression of CD5 protein,anti-collagenⅠ antibody(anti-Col-Ⅰantibody) and IL-10 protein was examined in mouse jaw bone and spleen by immunohistochemistry and Western blot;The mRNA expression of CD5,anti-Col-Ⅰantibody and IL-10 in mouse jaw bone was detected by real time quantitative PCR.Results:The mRNA and protein expressions of CD5 and IL-10 and anti-Col-Ⅰantibody in jaw bone in periodontitis group were significantly higher than those in control group(P<0.001).The protein expressions of CD5 and IL-10 and anti-Col-Ⅰantibody in spleen in obesity group were significantly higher than those in standard group(P<0.05).The protein expression of anti-Col-Ⅰantibody in spleen in standard accompanying periodontal ligature group was significantly higher than that in standard without periodontal ligature group(P<0.05).Conclusion:B-1a cells are activated in the early stage of obesity and periodontal inflammation with a certain pathological significance and without interation between the two inflammatory states in the pathological mechanism.
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