项目名称: 基于AGEs/RAGE系统探讨慢性间歇性低氧致胰岛素抵抗的作用
项目编号: No.81460018
项目类型: 地区科学基金项目
立项/批准年度: 2015
项目学科: 医药、卫生
项目作者: 徐积兄
作者单位: 南昌大学
项目金额: 50万元
中文摘要: 阻塞性睡眠呼吸暂停低通气综合征(OSAHS)可能导致2型糖尿病发病,但具体机制尚不清。慢性间歇性低氧(IH)是OSAHS典型特征之一,也可能是OSAHS致胰岛素抵抗(IR)的关键因素。由于晚期糖化终末产物(AGEs)及其受体(RAGE)系统可能在IR中起着重要作用,而IH又能激活 AGEs/RAGE系统。因此,本项目拟基于AGEs/RAGE系统探讨慢性IH致IR作用及机制研究。首先,在体外实验中使用RNA干扰抑制RAGE,检测IH对3T3-L1脂肪细胞和人脂肪细胞胰岛素信号通路等影响,同时检测NF-кB、JNK和HIF等表达情况。接着,在动物实验中通过RAGE基因敲除后,检测IH对RAGE-/-基因敲除小鼠模型体内胰岛素敏感性、胰岛β细胞功能和细胞凋亡以及体内胰岛素信号通路等影响。从而为慢性IH致IR作用机制提供新的实验依据。
中文关键词: 慢性间歇低氧;晚期糖化终末产物受体;(RAGE);胰岛素抵抗;阻塞性睡眠呼吸暂停低通气综合征
英文摘要: Obstructive sleep apnea-hypopnea syndrome (OSAHS) can cause type 2 diabetes, but the definite mechanism is still unclear. Chronic intermittent hypoxia (IH) is one of the typical features of OSAHS, may also be a key factor for OSA to cause insulin resistance (IR). The advanced glycation end products(AGEs) and its receptor (RAGE) system may play an important role in IR, and IH can also activate AGEs/RAGE system. Therefore, this project will explore the mechanisms which chronic IH causes IR, based on its effect on AGEs/RAGE system. Firstly, In vitro using RNAi to suppress RAGE, we will detect the effect of IH on insulin signaling pathway of 3T3-L1 adipocytes and human adipocytes, meanwhile the effect of IH on the expression of NF-кB, JNK and HIF. Then, In vivo, we will detect the effect of IH on insulin sensitivity, the function and apoptosis of slet beta cell and insulin signaling pathways in RAG-/- knockout mice model. This project will provide new experimental data for the mechanisms for the effect of IH on the development of IR.
英文关键词: Chronic intermittent hypoxia;Receptor for advanced glycation end products (RAGE);Insulin resistance;Obstructive sleep apnea hypopnea syndrome