免疫球蛋白G对2型糖尿病合并阿尔茨海默病患者外周血单核细胞分泌TNF-α的影响

摘要

Objective To explore the effects of immunoglobulin G on tumor necrosis factor (TNF-α) secretion of human peripheral blood mononuclear cells(PBMCs) in type 2 diabetes mellitus complicated with Alzheimer's disease(AD). Methods A total of 20 cases were chosen in each group from patients with type 2 diabetes mellitus complicated with Alzheimer' s disease and patients with type 2 diabetes mellitusm.PBMCs were isolated using density gradient centrifugation method and incu-bated with phytohemagglutinin (PHA) as well as immunoglobulin G extracted from blood serum of the patients with type 2 diabe-tes mellitus.TNF-α concentration in supernatant was measured by enzyme linked immunosorbent assay (ELISA). Results TNF-α concentration in supernatant of PBMCs was significantly increased in type 2 diabetes mellitus complicated with AD com-pared with that in type 2 diabetes mellitus (P<0.01).IgG further increased TNF-α concentration in type 2 diabetes mellitus and type 2 diabetes mellitus complicated with AD(P<0.01). Conclusion IgG extracted from the serum of type 2 diabetes mellitus patients can promote TNF-α secretion in PBMCs of type 2 diabetes mellitus complicated with AD.Immunity injury could play a role in the development of type 2 diabetes mellitus complicated with AD by promoting inflammatory reaction.%目的 探讨免疫球蛋白G对2型糖尿病合并阿尔茨海默病(AD)患者外周血单核细胞(PBMCs)分泌肿瘤坏死因子-α(TNF-α)的影响.方法 2型糖尿病合并AD患者和2型糖尿病患者各20例,密度梯度离心法分离PBMCs,加入植物血凝素(PHA)和2型糖尿病患者血清免疫球蛋白G(IgG)提取物,酶联免疫吸附(ELISA)法测定培养物的上清液中TNF-α浓度.结果 与2型糖尿病组相比,2型糖尿病合并AD组PBMCs培养物的上清液TNF-α浓度明显升高(P<0.01);加入血清免疫球蛋白G提取物后,两组PBMCs培养物上清液TNF-α浓度明显升高(P<0.01).结论 2型糖尿病患者血清免疫球蛋白G提取物可促进2型糖尿病合并AD患者PBMCs分泌TNF-α,免疫损害可能通过促进炎症反应在2型糖尿病患者发生AD中起作用.