Vertical sleeve gastrectomy (VSG) is booming now due to prominent weight loss and remission of type 2 type 2 diabetes (T2D). Intermittent vagal blocking (VBLOC) has newly been approved for morbid obesity therapy and is likely to lower glucose concentrations in T2D. Our pre-experimental results showed that anti-diabetic effects of VSG could be weakened partially by subphrenic vagotomy. In this study, the Goto-Kakizak rats are firstly used to explore the effects of VSG plus vagotomy on glucose homeostasis. Furthermore, the treatment-induced histological and cellular alterations in central and peripheral tissues are detected based on short, medium, and long-term observations. Finally, we focus on the changes of key signaling pathways involved in glucose metabolism. These findings will test our hypothesis that central-autonomic nervous responses via vagal nerve would play a vital role in amelioration of glycemic control by VSG and the central-autonomic nervous system should be regarded as an ideal target for diabetic treatment.
目前,垂直袖状胃切除(VSG)在病态肥胖症治疗中发展迅速,并可以显著缓解2型糖尿病。新近,间断性迷走神经阻断被批准应用于临床减重治疗,并可能具有抗糖尿病效应。但是,两种减肥/代谢手术的作用机制尚不清楚。我们的前期研究显示:VSG改善GK大鼠血糖控制的效应可能被膈下迷走神经切断所削弱。本项目在前期研究基础上,拟对迷走神经介导的中枢-自主神经系统反应在糖代谢调控中的作用进行初步研究,探讨VSG、不同水平迷走神经切断及其联合应用对GK大鼠葡萄糖稳态、内源性葡萄糖产生和葡萄糖效能的影响,研究不同手术方式干预下中枢-自主神经系统和外周靶器官的短、中、长期组织细胞学改变,并检测中枢和外周组织中参与糖代谢的关键信号分子的表达变化,揭示不同水平迷走神经阻断对糖代谢的影响,进一步阐明VSG在糖代谢调控中的神经-内分泌机制,为开发针对中枢-自主神经系统的新型T2D治疗方式和药物靶向治疗奠定实验基础。
本项目首先建立了稳定的、可以长期存活的VSG 联合迷走神经切断动物模型,并在此基础上研究迷⾛神经切断对 VSG 抗糖尿病效应的影响,明确迷走神经介导的中枢-自主神经系统反应在糖代谢调控中的发挥了重要作用。通过检测中枢-迷走神经系统和外周组织的组织学改变,初步分析了SG和SG+TV术后,迷走神经元分布和数量、胃肠道激素及其受体和肠道微生态的改变。建立基于荧光标记迷⾛神经元的高脂饮食诱导肥胖(DIO)小鼠和袖状胃切除(SG)小鼠模型。在此基础上,对迷走神经介导的中枢-自主神经系统反应在糖代谢调控中的作用进行初步研究,探讨VSG、不同水平迷走神经切断及其联合应用对葡萄糖稳态、内源性葡萄糖产生和葡萄糖效能的影响,研究不同手术方式干预下中枢-自主神经系统和外周靶器官的短、中、长期组织细胞学改变,并检测中枢和外周组织中参与糖代谢的关键信号分子的表达变化,揭示不同水平迷走神经阻断对糖代谢的影响,进一步阐明VSG在糖代谢调控中的神经-内分泌机制。
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数据更新时间:2023-05-31
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