2型糖尿病患者瘦素与胰岛素抵抗的相关性研究

目的探讨2型糖尿病患者血清瘦素水平与性别、体重指数及胰岛素抵抗的相关性。方法随机选108例2型糖尿病患者根据体重指数BMI(身高/体重2)分为糖尿病肥胖组和糖尿病正常BMI组,均测量身高、体重、空腹血糖(FPG)、空腹真胰岛素(FTI)、空腹瘦素(LP)及馒头餐后2h真胰岛素(PTI),以ISI=1/(FBG×FTI)作为胰岛素敏感指数,对瘦素与性别、BMI、空腹和餐后胰岛素及胰岛素敏感指数做相关性分析。结果⑴糖尿病肥胖组的瘦素、体重指数和胰岛素水平高于糖尿病正常BMI组,胰岛素敏感性指数糖尿病肥胖组低于糖尿病正常BMI组。⑵糖尿病肥胖组和糖尿病正常BMI组女性瘦素均明显高于男性。⑶直线相关性分析表明瘦素与性别显著相关,瘦素与体重指数和空腹胰岛素呈明显正相关,与ISI呈明显负相关。结论2型糖尿病患者血清瘦素与性别、体重指数、胰岛素抵抗密切相关。     

蒙古族人群2型糖尿病瘦素水平与胰岛素抵抗

目的 在蒙古族人群中探讨血清瘦素水平与2型糖尿病胰岛素抵抗的关系.方法 在蒙古族人群中选择2型糖尿病患者54例及健康对照36人,检测其血清瘦素(Leptin)水平、空腹血糖(FPG)、空腹胰岛素(FINS)、体质指数(BMI)、血压、血脂等指标,并计算胰岛素敏感指数(ISI).结果 病例组与对照组比较,瘦素、FPG、FINS、BMI、甘油三酯(TG)、明显高于对照组,而ISI、高密度脂蛋白(HDL-C)明显低于对照组(P<0.05);糖尿病组瘦素与BMI、FINS、TG、总胆固醇(TC)呈正相关,而与ISI呈负相关(P<0.05);多元逐步回归分析显示,影响胰岛素敏感指数(ISI)的独立预测因素是瘦素、BMI、FINS(P<0.05).结论 2型糖尿病患者血清瘦素水平明显升高,肥胖、瘦素抵抗与胰岛素抵抗(IR)密切相关.     

单纯性肥胖儿童血清瘦素胰岛素及血糖关系的研究

通过对单纯性肥胖儿童的血清瘦素、胰岛素、血糖及其相关性进行研究 ,为预防和治疗肥胖及其并发症提供一定的科学依据 ,对 58名肥胖儿童和 55名非肥胖儿童测定其血清瘦素、胰岛素、C-肽、血糖 ,并测定皮褶厚度 ,计算体脂百分比 (% BF)、体质指数 (BMI)。结果肥胖组儿童血清瘦素、胰岛素、 C-肽显著高于非肥胖组儿童 (P<0 .0 5) ,肥胖组与非肥胖组儿童血糖浓度没有显著性差异 (P>0 .0 5)。% BF、 BMI与血清瘦素、胰岛素、 C-肽均呈显著正相关 (P<0 .0 5) ,瘦素与胰岛素、 C-肽呈显著正相关 (P<0 .0 5)。肥胖儿童存在瘦素抵抗 ,通过降低体重来减轻瘦素抵抗能改善高胰岛素血症进而治疗 型糖尿病     

脂肪肝患者瘦素与胰岛素抵抗的研究

目的　探讨脂肪肝患者血清瘦素水平变化及其与胰岛素抵抗之间的关系。方法　用放免法测定 5 7例脂肪肝患者及 33例正常对照组患者血清瘦素 (LEP)水平 ,同时测定体重指数(BMI)、空腹血糖 (FPG)、空腹胰岛素 (FINS)、血脂 ,采用稳态模式 (HOMA)评价胰岛素抵抗。结果　(1)脂肪肝患者LEP水平、BMI、FPG、FINS、HOMA、胆固醇 (TC)、甘油三酯 (TG)、低密度脂蛋白 (LDL-C)均高于对照组 (P <0 .0 1、P <0 .0 5 )。 (2 )女性LEP水平明显高于男性 (P <0 .0 1)。 (3)LEP与BMI、FINS、TC、TG、LDL -C、HOMA呈正相关 ;多元线性回归分析显示 ,脂肪肝患者HOMA、FINS、BMI是LEP的主要相关因素。结论　脂肪肝患者存在高瘦素水平及瘦素抵抗、高胰岛素血症及胰岛素抵抗 ,高瘦素水平与胰岛素抵抗密切相关。     

瘦素抵抗与老年男性肥胖高血压的关系

目的 :　研究老年男性肥胖高血压患者血清瘦素和胰岛素水平的变化 ,探讨瘦素抵抗与老年男性肥胖高血压的关系。方法 :　用放射免疫法测定 41例高血压和 2 1例正常血压的老年男性患者血清瘦素和胰岛素的含量。结果 :　在高血压和肥胖分组中空腹血糖变化无显著性差异。非肥胖组高血压与正常血压者血清瘦素和胰岛素的水平差别无显著性。肥胖组高血压者较正常血压者血清瘦素和胰岛素含量分别平均升高 1 .8μg/L和 2 .7m IU/L(P<0 .0 1 )。高血压组中肥胖者较非肥胖者血清瘦素和胰岛素水平分别平均升高 2 .7μg/L和 4.7m IU/L (P<0 .0 0 1 )。 70岁以上者较 6 0～ 70岁者血清瘦素水平平均升高 1 .7μg/L(P<0 .0 5 )。结论 :　老年肥胖高血压存在瘦素抵抗和胰岛素抵抗 ,瘦素与伴有肥胖的高血压有密切关系。     

2型糖尿病患者瘦素水平及其相关因素分析

目的　研究 2型糖尿病患者血清瘦素与性别、体重指数 (BMI)、腰臀比 (WHR)、胰岛素、血糖、总胆固醇和甘油三脂的关系。方法　随机选取 5 6例 2型糖尿病患者与 2 2例非糖尿病者 ,分别测定入选对象的体重指数、腰臀比值 (WHR)、空腹瘦素、空腹和餐后 2h血糖、总胆固醇和甘油三脂。结果　血清平均瘦素水平男性 ( 8 5± 0 9)ug/L ,女性 ( 17 2± 1 1)ug/L ,女性明显高于男性 ,血清瘦素与BMI呈显著正相关 (γ =0 64 ,P <0 0 1) ,与男性WHR显著正相关 (γ =0 5 0 ,P <0 0 1) ,血清瘦素与胰岛素显著正相关(空腹γ =0 3 6,P <0 0 1,餐后 2hγ =0 3 4,P <0 0 1) ,瘦素与血糖、血脂没有相关性。结论　血清瘦素浓度与BMI、男性WHR显著正相关 ,与胰岛素有显著正相关性。     

人血清瘦素水平与肥胖、胰岛素和血脂的关系

目的　探讨血清瘦素水平与脂肪含量、年龄、性别、血糖、血脂、胰岛素的关系。方法　 85例受试者按体质量指数 (BMI)分为 3组 :Ⅰ组BMI<2 3kg/m2 2 0例 ,Ⅱ组 2 3kg/m2 ≤BMI<2 5kg/m2 18例 ,Ⅲ组BMI≥ 2 5kg/m2 4 7例。测定其空腹血清瘦素水平、空腹血糖、空腹胰岛素、身高、体质量、收缩压、舒张压、脂肪百分数、甘油三酯、总胆固醇等。结果 (1)女性瘦素浓度高于男性 (P <0 .0 1)。Ⅲ组瘦素水平高于Ⅱ组和Ⅰ组 ;(2 )血清瘦素水平与BMI(r=0 .4 71,P <0 .0 1) ,脂肪百分数 (r=0 .318,P <0 .0 1) ,胰岛素 (r=0 .388,P <0 .0 1)、甘油三酯 (r=0 .371,P <0 .0 1)、胆固醇 (r=0 .4 91,P <0 .0 1)和收缩压 (r=0 .2 2 0 ,P <0 .0 5 )成正相关。结论　性别、脂肪含量、空腹胰岛素、血脂与瘦素存在着显著的相关性 ,高瘦素血症和瘦素抵抗可能与高胰岛素血症、胰岛素抵抗和 2型糖尿病有关     

2型糖尿病患者血清内脂素、脂联素和瘦素水平的变化

目的研究2型糖尿病(T2DM)患者血清中内脂素、脂联素和瘦素水平,为阐明T2DM的发病机制提供基础。方法将220例新诊T2DM患者和214例年龄、性别与体重指数(BMI)相匹配的健康对照组,按BMI≥25kg/m2或25kg/m2分为肥胖亚组和非肥胖亚组,采用酶联免疫吸附法(ELISA)和放射免疫法(RIA)检测其血清内脂素、脂联素和瘦素水平,并同时采用生化和化学发光法检测空腹血糖(FPG)、甘油三酯(TG)、胆固醇(Chol)以及空腹胰岛素(FINS)等。结果1.T2DM组血清内脂素、FPG、FINS、胰岛素抵抗指数(HOMA-IR)、TG、Chol水平均高于健康对照组(P0.05～0.001),而脂联素水平低于健康对照组(P0.001),瘦素在两组人群中差异无统计学意义(P0.05);2.无论是T2DM组还是健康对照组中,其肥胖亚组中的内脂素、瘦素、FINS、HOMA-IR、TG、Chol水平均高于非肥胖亚组(P0.05～0.001),而脂联素低于非肥胖亚组(P0.01～0.001);3.消除BMI因素影响的偏相关分析显示,T2DM患者血清内脂素水平仅与FPG、FINS、HOMA-IR呈正相关(r=0.267～0.443,P0.05～0.01),与脂联素呈负相关(r=-0.312,P0.05)。结论内脂素和脂联素参与了肥胖、胰岛素抵抗以及T2DM发生过程,而瘦素可能仅与肥胖状况有关,未能以独立因子作用直接参与T2DM的发生。     

肥胖儿童非酒精性脂肪性肝病血清瘦素水平分析

目的:检测肥胖儿童和正常对照儿童血清瘦素水平,探讨瘦素与非酒精性脂肪性肝病的相关性.方法:对100例肥胖儿童及100例正常对照儿童测量身高、体重,计算体重指数(BMI);检测空腹血糖(FPG)、胰岛素(FINS)、谷丙氨酸氨基转移酶(ALT)总胆固醇(Tc)、甘油三酯(TG)、高密度脂蛋白胆固醇(HDL-C)、低密度脂蛋白胆固醇(LDL-C)、载脂蛋白A(ApoA)、载脂蛋白B(ApoB);胰岛素抵抗采用稳态模式评估法的胰岛素抵抗指数(HOMA-IR)指标;血清瘦素采用酶联免疫吸附试验检测.对肥胖儿童进行肝脏B超检查,并对非酒精性脂肪性肝病病变程度分为轻、中、重度,分别积分1、2、3分.结果:肥胖组瘦素、BMI、ALT、TG、LDL-C、TC、APB、FINS、HOMA-IR较对照组高(P＜0.05),而HDL-C较对照组低P＜0.05.100例肥胖儿童组中根据B超发现非酒精脂肪性肝病(NAFLD) 55例,与其余45例单纯肥胖儿童结果比较显示:NAFLD组瘦素、BMI、TG、ALT、FINS、HOMA-IR水平较高P＜0.05,而HDL-C水平较低P＜0.05;多元Logistic回归分析显示BMI、瘦素和TG水平是脂肪肝形成的主要危险因素;多元线性回归分析显示瘦素和BMI与NAFLD评分独立相关(P值＜0.05).结论:高瘦素水平是肥胖儿童非酒精性脂肪性肝病的危险因素之一,监测血清瘦素水平有助于判断非酒精性脂肪性肝病的病变程度.     

老年人肝硬化患者血清瘦素的变化及临床意义

目的　检测老年人肝硬化患者血清瘦素水平 ,探讨其异常变化的临床意义。方法　分别测定老年人肝硬化和对照组的血清瘦素、肝功能、空腹血糖 (FBG)、胰岛素、血氨并计算体重指数 (BMI)。分析各组间瘦素与各指标间的关系。结果　老年人肝硬化组的血清瘦素、胰岛素、FBG、血氨水平显著高于对照组 (P <0 .0 1或P <0 .0 5 ) ,血清瘦素和血氨水平在Child -PughA和C级间有显著性差异 (P <0 .0 5 ,P <0 .0 1) ;Child -PughB、C级的BMI与对照组有显著性差异 (P <0 .0 5 )。肝硬化组的瘦素与BMI、胰岛素和血氨水平显著相关。结论　老年人肝硬化患者的血清瘦素水平升高 ,并随肝功能的逐渐恶化而升高 ,与BMI、空腹胰岛素和血氨明显相关。     

Plasma Levels of Persistent Organohalogens and Hormone Levels in Adult Male Humans

In this study the authors assessed the possible relationship between high dietary exposure to persistent organohalogens (OHS) through fatty fish from the Baltic Sea and hormone levels in adult men. Blood samples were drawn from 110 men who consumed varying amounts of fish (i.e., 0-32 meals per month) for analysis of plasma levels of 18 polychlorinated biphenyl (PCB) congeners, 5 hydroxy-PCBs, 1,1,1 -trichloro-2,2-bis(4-chlorophenyl)-ethane (p,p'-DDT), 1,1-dichloro-2,2-bis(4-chlorophenyl)-ethene (p,p'-DDE), hexachlorobenzene, and 2,2′,4,4′-tetrabromodiphenyl ether. In addition, plasma levels of follicle-stimulating hormone, luteinizing hormone, prolactin, plasma thyrotropin, free and total T3, free and total T4, and free testosterone were analyzed. The authors adjusted for age, and the only significant associations that remained were negative correlations between 2,2′,4,4′-tetrabro-modiphenyl ether and plasma thyrotropin (p < .001), and between pentachlorophenol and follicle-stimulating hormone (p = .04). The authors expected that there would be some significant correlations that resulted from pure chance. High consumption of organohalogen-polluted fish did not appear to affect plasma concentrations of pituitary, thyroid, or testosterone hormone levels in male adults.     

Human Liver Glycogen Levels

The glycogen content of liver biopsies from 37 individuals was determined and no relationship was noted between the glycogen level and the nutritional status as judged by body weight.     

Association Between Serum Levels of Carotenoids and Serum Asymmetric Dimethylarginine Levels in Japanese Subjects

Background

Asymmetric dimethylarginine (ADMA) is an endogenous inhibitor of endothelium nitric oxide synthase (NOS). ADMA binds to a substrate-binding site of NOS and then inhibits nitric oxide production from vascular endothelial cells. Elevated ADMA levels are a risk factor for cardiovascular disease. Recently, it was reported that plasma ADMA levels were negatively correlated with vegetable and fruit consumption. The purpose of this study was to examine the association between serum levels of carotenoids and serum ADMA levels in Japanese subjects.

Methods

We conducted a cross-sectional study of 470 subjects (203 men and 267 women) who attended a health examination in August 2011. Serum levels of several carotenoids were separately measured by high-performance liquid chromatography. Serum ADMA levels were determined by using an enzyme-linked immunosorbent assay kit.

Results

In women, the multivariate-adjusted odds ratios (ORs) of elevated serum ADMA levels were significantly decreased in the highest tertile for β-cryptoxanthin (OR 0.47, 95% CI 0.23–0.95), α-carotene (OR 0.39, 95% CI 0.18–0.79), and β-carotene (OR 0.36, 95% CI 0.17–0.73) compared to the lowest tertile. In men, significantly decreased ORs were observed in the highest tertiles of serum zeaxanthin/lutein (OR 0.23, 95% CI 0.06–0.69) and α-carotene (OR 0.26, 95% CI 0.07–0.82), and in the middle and the highest tertiles of serum β-carotene (OR 0.27, 95% CI 0.09–0.74 and OR 0.20, 95% CI 0.03–0.88, respectively) when the tertile cutoff points of women were extrapolated to men.

Conclusions

Higher serum levels of carotenoids, such as α-carotene and β-carotene, may help to prevent elevated serum ADMA levels in Japanese subjects.Key words: asymmetric dimethylarginine, carotenoids, cross-sectional study     

慢性充血性心力衰竭患者血清瘦素、肿瘤坏死因子-α浓度的变化

目的：观察慢性充血性心力衰竭（CHF）患者血清瘦素（LP）、肿瘤坏死因子－α（TNFα）浓度的变化及其与胰岛素（INS）等因素的关系。方法：测定40例CHF患者的血清LP、TNFα、空腹胰岛素（FINS）浓度、体重指数（BMI）等指标，并与健康人作对照。LP、FINS用放免测定，TNFα用ELISA法测定。结果：（1）轻度心衰患者（NYHA心动能分级I、Ⅱ级）的血清LP、FNIS浓度明显低于对照组（P＜0．05－0．05）。（2）CHF患者的血清TNFα明显高于对照组，但与心功能分级无关。结论：（1）CHF患者血清LP、FINS浓度与NYIIA心功能分级有关，轻度心衰患者体内存在合成代谢，而中、重度心衰患者体内以分解代谢为主。（2）CHF患者体内TNFα浓度升高，但与NYHA心功能分级无关。     

Pentachlorophenol Levels in Human Urine

Received: 1 June 1995/Accepted: 7 September 1995