Diabetic prevalence in China is rising sharply in these years and it becomes an important public health problem which has a strong impact on the state's economic development and the quality of life for patients. Effective prevention and control of diabetes at earlier stages may be an important strategy. So developing a more suitable method to prevent high risk group away from DM is appropriate. Latest overseas studies have shown that Vitamin D may have prevention effect on DM, while there is little literature on this field in Chinese Han...In this project, the samples of high risk group of diabetes will be selected from the survey on chronic diseases and their risk factors in Shenzhen. According to the results of BMI and 2 hours imparied glucose tolerance (IGT), these volunteers can be divided into 2 groups. The control group will also be selected in 1:1 ratio considering the major confounding fators (including age, gender, etc.). The three groups will be intervened by Vitamin D through the three-stage diabetes morinitoring and management network system. And the difference among the groups will be monitored through the indicator of insulin (resistance) levels. Plasma differential proteomics will be established for discovery and validation of the biomarkers for the assessment of prevention effect. This project will elucidate the Vitamin D sensibility of the high risk group of diabetes mellitus among Chinese Han for the first time, and help us better understand the molecular mechanism of diabetes. It also provides new ideas and theoretical basis of DM in early diagnosis and prevention.
糖尿病患病率呈急剧上升的趋势,已成为我国重大的公共卫生问题。关口前移是有效防控糖尿病的重要策略,对糖尿病高危人群进行有效干预,选择适宜的防治技术是基础。国外最新的研究表明,维生素D对糖尿病具有干预作用,但是我国汉族糖尿病高危人群对其敏感性和干预效果缺乏系统的研究。. 本项目拟从深圳市慢性病及其相关危险因素调查项目中筛选出糖尿病高危人群样本,按照BMI和2小时糖耐量结果分为肥胖组和糖耐量受损组,并且根据年龄、性别等主要混杂因素进行1:1配对,确定对照组。依托于已构建的糖尿病监测和管理网络体系,对高危人群进行VD干预和追踪,监测受试者胰岛素水平、胰岛素抵抗水平的变化;同时,采用差异蛋白质组学策略,对其VD的敏感性进行评估。本项目将首次阐明中国汉族糖尿病高危人群的VD敏感性,并深入探讨糖尿病防治的分子机制,为糖尿病早期诊断和预防提供了全新的思路和理论依据。
项目的背景 糖尿病患病率呈急剧上升的趋势,已成为我国重大的公共卫生问题。关口前移是有效防控糖尿病的重要策略,对糖尿病高危人群进行有效干预,选择适宜的防治技术是基础。国外最新的研究表明,维生素D对糖尿病具有干预作用,但其机制尚不十分明确。.主要研究内容 从深圳市慢性病流行病学调查项目人群中筛选对照组及糖尿病高危组实验对象,进行VD补充剂干预;建立自发性糖尿病大鼠模型(ZDF大鼠)并用1, 25-(OH)2-VD3进行早期干预,观察并测定各组大鼠的血糖、尿糖、胰岛素等的变化情况。.重要结果 研究发现,1, 25-(OH)2-VD3干预能够显著降低ZDF大鼠血糖、尿糖,增强胰岛素的敏感性。与此同时,1, 25-(OH)2-VD3干预也明显缓解胰岛β细胞及胰岛素抵抗靶器官如肝脏、骨骼肌、心脏的损伤,并表现出良好的剂量效应关系。研究表明,适量的Vitamin D3补充能够有效缓解糖尿病的发生,相关机制需进一步探讨。.关键数据 从大鼠第6周龄开始,与对照组(C)相比,模型组(DM)、1, 25-(OH)2-VD3低、中、高三个剂量干预组大鼠体重明显增加(P<0.05),并且该趋势一直持续到实验结束(13周龄)。与正常对照组相比,1, 25-(OH)2-VD3对照组大鼠的饮水量及尿量均显著增加;模型组(DM) 大鼠血清TG、TC水平都显著升高(P < 0.05),表现为明显的高甘油三酯和高胆固醇血症。1, 25-(OH)2-VD3干预显著改善瘦素基因敲除ZDF大鼠血清TG、TC水平的异常升高(P < 0.05);与正常对照组相比,模型组(DM)大鼠血清血糖显著升高,均值高达22.2 mmol/L,不同剂量的1, 25-(OH)2-VD3干预使得ZDF大鼠血糖逐步趋于正常水平(P < 0.05),中、高剂量的效果更加显著。.其科学意义 本项目的初步研究结果显示,1, 25-(OH)2-VD3的补充可以适度改善2型糖尿病的血糖、血脂等异常情况。表明维生素D在2型糖尿病的发病机制、早期预防甚至疗效方面有重要意义,有必要进一步研究。.
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数据更新时间:2023-05-31
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