代谢综合征患者血清抵抗素与血脂、肥胖和胰岛素抵抗关系的研究

目的:探讨代谢综合征患者血清抵抗素水平与血脂、肥胖和胰岛素抵抗的关系。方法: 60 例代谢综合征患者和28 例年龄相匹配的正常对照者,按体重指数将代谢综合征患者分为肥胖组和非肥胖组。采用ELISA方法测定受试者空腹血清抵抗素和瘦素水平,同时检测其身高、体重、腰围、臀围、血压、血糖、血脂及胰岛素水平,并计算体重指数(BMI)、腰臀比(WHR)和胰岛素抵抗指数(HOMA)。结果:代谢综合征患者肥胖组和正常对照组相比其血清抵抗素水平明显升高(28.28±11.7μg/L与19.44±5.79μg/L,P<0.01);非肥胖组和正常对照组相比其血清抵抗素水平明显升高(26.14±11.9μg/L与19.44±5.79μg/L,P<0.05)。肥胖组和正常对照组相比其血清瘦素水平明显升高(1.47±0.57μg/L与0.31±0.13μg/L,P<0.01);非肥胖组和正常对照组相比其血清瘦素水平明显升高(1.35±0.57μg/L与0.31±0.13μg/L,P<0.01)。肥胖组和非肥胖组相比其血清抵抗素、瘦素水平无显著差异。相关分析显示空腹抵抗素水平与腰臀比、空腹胰岛素、胰岛素抵抗指数呈显著正相关(分别为r=0.22,0.22,0.19;P<0.05);与体重指数、腰围、臀围、瘦素呈显著正相关(分别为r=0.31,0.32,0.36,0.28;P<0.01);而与收缩压、舒张压、总胆固醇、甘油三酯、低密度脂蛋白胆固醇(LDL C)、血     

Adipose tissue as an endocrine organ

Obesity is characterized by increased storage of fatty acids in an expanded adipose tissue mass and is closely associated with the development of insulin resistance in peripheral tissues such as skeletal muscle and the liver. In addition to being the largest source of fuel in the body, adipose tissue and resident macrophages are also the source of a number of secreted proteins. Cloning of the obese gene and the identification of its product, leptin, was one of the first discoveries of an adipocyte-derived signaling molecule and established an important role for adipose tissue as an endocrine organ. Since then, leptin has been found to have a profound role in the regulation of whole-body metabolism by stimulating energy expenditure, inhibiting food intake and restoring euglycemia, however, in most cases of obesity leptin resistance limits its biological efficacy. In contrast to leptin, adiponectin secretion is often diminished in obesity. Adiponectin acts to increase insulin sensitivity, fatty acid oxidation, as well as energy expenditure and reduces the production of glucose by the liver. Resistin and retinol binding protein-4 are less well described. Their expression levels are positively correlated with adiposity and they are both implicated in the development of insulin resistance. More recently it has been acknowledged that macrophages are an important part of the secretory function of adipose tissue and the main source of inflammatory cyokines, such as TNFα and IL-6. An increase in circulating levels of these macrophage-derived factors in obesity leads to a chronic low-grade inflammatory state that has been linked to the development of insulin resistance and diabetes. These proteins commonly known as adipokines are central to the dynamic control of energy metabolism, communicating the nutrient status of the organism with the tissues responsible for controlling both energy intake and expenditure as well as insulin sensitivity.     

儿童哮喘发作期血浆脂联素和抵抗素水平变化及意义

目的：通过观察两组儿童血浆中脂联素（adiponectin,ADP）和抵抗素（resistin,ADSF）水平的变化,初步探讨ADP与ADSF在哮喘发病中的作用及其两者的相关性。方法：采用酶联免疫吸附实验（ElISA）测定40例4-14岁支气管哮喘患儿发作期血浆中ADP和ADSF水平,与40例同年龄段健康小儿血浆水平做统计分析。结果：ADP在实验组与对照组之间无统计学意义（P〉0.05）;实验组ADSF明显高于对照组,有统计学意义（P〈0.05）;ADP与ADSF水平变化两组均无相关性（r值分别为-0.127、-0.227,P值均大于0.05）。结论：ADSF可能参与哮喘发病,其水平增高提示哮喘存在,ADP与儿童哮喘发生无直接关系。     

老年2型糖尿病合并代谢综合征患者血清抵抗素水平与胰岛素抵抗的关系研究

目的探讨老年2型糖尿病合并代谢综合征(MS)患者空腹血清抵抗素水平与胰岛素抵抗的关系。方法选取老年2型糖尿病患者82例,其中46例合并MS(MS组),36例不合并MS(非MS组),另选取同期30例健康体检者作为对照组。检测3组受试者的空腹血清抵抗素水平,分别计算体质指数(BMI)、腰臀比(WHR)和胰岛素抵抗指数(HOMA-IR),并测定相关代谢指标,利用SPSS 13.0软件进行统计学分析。结果 MS组及非MS组糖尿病患者血清抵抗素水平及HOMA-IR均显著高于对照组,MS组患者上述两项指标亦显著高于非MS组,差异均有统计学意义(P<0.05)。多元逐步回归分析显示,抵抗素受HOMA-IR、WHR影响较大。结论老年2型糖尿病合并MS患者血清空腹抵抗素水平显著升高,且抵抗素水平与HOMA-IR及WHR呈正相关;抵抗素可能在胰岛素抵抗、肥胖和糖尿病中发挥重要作用。     

人抵抗素与冠脉病变严重程度的相关性研究

目的探讨人抵抗素(resistin)含量与冠状动脉粥样硬化病变程度的关系。方法采用Gensini评分系统对283例患者冠状动脉血管病变程度进行定量评分,得出Gensini积分。RESISTIN采用酶联免疫试验(ELISA)检测。统计分析resistin含量与冠状动脉粥样硬化狭窄程度的关系。结果由低至高resistin四分位分组后,患者的年龄、胸痛病程、血脂、血糖、athens QRS积分以及Gensini积分在不同resistin组间差异有显著性(P<0.05)。年龄、血糖和resis-tin,LDL-c与Gensini积分呈显著正相关,resistin是Gensini积分的独立影响因子。结论血中resistin浓度的含量与冠状动脉病变的程度呈正相关,对冠心病的病变程度具有预测价值。     

高脂饮食诱导的肥胖及肥胖抵抗大鼠血浆抵抗素水平的研究

目的探讨高脂饮食诱导的肥胖及肥胖抵抗大鼠血浆抵抗素水平的变化。方法将30只Wistar雄性大鼠随机分为正常对照组8只和高脂饮食组22只,分别给予普通饮食和高脂饮食。喂养8周,观察体重变化,按体重增量,高脂饮食组大鼠又分为高脂肥胖组12只及肥胖抵抗组10只,测定并比较各组大鼠血清三酰甘油、总胆固醇及抵抗素水平。结果高脂肥胖组大鼠血清三酰甘油水平显著高于正常对照组,有统计学意义(P<0.05);总胆固醇水平显著高于正常对照组和肥胖抵抗组,有统计学意义(P<0.05,P<0.01);高脂肥胖组血清抵抗素高于正常对照组和肥胖抵抗组(P<0.05),肥胖抵抗组血清抵抗素与正常对照组差异无统计学意义(P>0.05)。结论在高脂饮食诱导的肥胖大鼠中,血浆抵抗素水平升高,并存在着血脂紊乱,而肥胖抵抗大鼠血浆抵抗素水平没有明显的变化。提示血浆抵抗素水平可能参与肥胖抵抗的发生。     

ApoE phenotype is associated with inflammatory markers in middle-aged subjects

Objectives:  Apolipoprotein (apo) E phenotype has been associated with inflammation markers. The determinants of these associations and the relationship between novel inflammation marker, resistin, and apoE phenotype are studied here. Methods and Results:  Middle-aged subjects of the population- based cohort (n = 526) of the OPERA– study were studied. Intima-media thickness (IMT) was measured with carotid ultrasound. The results suggest that, apoE phenotype was a significant independent predictive factor for resistin (p < 0.01) and hsCRP (p < 0.01) levels. The association of ApoE phenotype with hsCRP was seen among the subjects with the normal renal function (p = 0.005). ApoE4 was associated (p < 0.01) with the lowest hsCRP in the lowest IMT quartile while it's relation with the highest resistin levels was evident in the highest IMT quartile. Conclusions:  ApoE phenotype is an independent determinant of plasma resistin and hsCRP levels. The extent of atherosclerosis and renal function seem to modify the effects of apoE phenotype on inflammatory parameters. Received 6 April 2008; returned for revision 6 August 2008; received from final revision 27 October 2008; accepted by M. Katori 28 October 2008     

不同腰臀比的2型糖尿病血清抵抗素水平分析

目的探讨不同腰臀比的2型糖尿病（DM）血清抵抗素水平与胰岛素抵抗的关系。方法对33例新诊断为2型糖尿病肥胖患者,27例新诊断为2型糖尿病非肥胖患者,28例糖耐量正常肥胖的对照者和25例正常非肥胖的对照者采用酶联免疫分析法检测其空腹及口服75 g葡萄糖后30 min的血清抵抗素、胰岛素水平、C肽,同时观测血胆固醇（TC）、低密度脂蛋白（LDL）、糖化血红蛋白（HbAIC）、FA、反应蛋白（CRP）、血糖、身高、体重、腰/臀围,计算体重指数（BMI）、腰臀比值（WHR）。结果2型DM组的WHR水平均高于对照组（P〈0.05）;空腹血糖、HBAIC、FA,2型DM肥胖组高于正常非肥胖组和正常肥胖组（P〈0.05）,正常肥胖组高于正常非肥胖组（P〈0.05）,但抵抗素水平与对照组之间的差异无统计学意义（P＆gt;0.05）。相关分析显示抵抗素与空腹胰岛素、空腹C肽、服糖后30 min胰岛素及C肽呈正相关（P〈0.05）,与高密度脂蛋白（HDL）呈负相关（P〈0.05）,但未发现抵抗素与年龄、性别、体质指数（BMI）、WHR、血TC、LDL、HBAIC、FA、CRP、空腹血糖（GLU）等指标的相关性有统计学意义（P均〉0.05）.结论2型DM患者血清抵抗素水平正常,且与肥胖、腰臀比值、胰岛素抵抗关系不明显,因而抵抗素可能没有直接参与肥胖、胰岛素抵抗和2型糖尿病的发生。     

抵抗素与肥胖及2型糖尿病相关性研究

抵抗素是一种脂肪组织特异性激素,对抗胰岛素,导致机体胰岛素抵抗。目前认为抵抗素与肥胖、胰岛素抵抗呈正相关,肥胖可导致抵抗素浓度增加。其相关的单核苷酸多态性位点也成为近年来的研究热点。而有关抵抗素及其单核苷酸多态性位点与2型糖尿病的关系,各方研究结果不一,尚存在争议,仍有待深入研究。     

氟伐他汀对慢性充血性心力衰竭血清抵抗素水平的影响

目的:观察氟伐他汀对慢性充血性心力衰竭(CHF)患者血清抵抗素浓度的影响。方法:临床选择CHF患者49例,随机分为CHF对照组(25例)和CHF治疗组(24例)。两组均给予常规治疗,CHF治疗组除常规治疗外还给予氟伐他汀口服8周(20mg/d)。治疗前、后分别测定左心室舒张末内径(LVDd)、左心室射血分数(LVEF)、血清抵抗素浓度,并行6min步行距离分析。结果:(1)与治疗前对比,CHF对照组和治疗组治疗后LVEF明显增加(P<0.05),LVDd降低,6min步行距离增加,血清抵抗素明显下降(P<0.05)。(2)治疗8周后,CHF治疗组LVEF、LVDd、6min步行距离和抵抗素水平与CHF对照组对比有明显差异(P<0.05)。结论:氟伐他汀能改善心功能,并降低CHF患者血清抵抗素水平。