超重人群血清网膜素-1水平的变化及其影响因素

目的 探讨超重人群血清网膜素-1水平的变化及其影响因素.方法 选择超重组29例,正常体重组21例,检测腰围（WC）、血糖、血脂、血清网膜素-1、脂联素及瘦素水平,计算腰臀比（WHR）、体重指数（BMI）、脂联素与瘦素的比值,并分析网膜素-1与各指标之间的关系.结果 与正常体重组相比,超重组血清网膜素-1、脂联素水平及脂联素/瘦素的比值明显降低,而瘦素水平升高（P均〈0.05）.相关性分析显示,血清网膜素-1水平与WC（r=-0.27,P〈0.05）、BMI（r=-0.36,P〈0.05）呈显著负相关,与脂联素呈显著正相关（r=0.29,P〈0.05）.结论 超重人群血清网膜素-1水平降低,血清网膜素-1可能在肥胖的发生发展中起一定的作用.     

原发性高血压患者血清脂联素水平及与血压、胰岛素抵抗的关系

目的探讨原发性高血压患者血清脂联素水平及其与血压、胰岛素抵抗之间的关系。方法选取原发性高血压患者65例及健康对照者40名,用酶联免疫吸附法检测各组空腹血清脂联素浓度,同时测定各组的血压、体重指数、腰围、血糖、胰岛素等指标,采用稳态模型法计算胰岛素抵抗指数(IRI)和胰岛素敏感指数(ISI),并分析血清脂联素与各指标间的相关性。结果原发性高血压组血清脂联素水平显著低于健康对照组[(10.30±0.93)μg/ml比(12.83±1.66)μg/ml),P=0.000]。Pearson相关性分析显示,原发性高血压组血清脂联素与收缩压(r=-0.304,P=0.032)、体重指数(r=-0.496,P=0.000)、腰围(r=-0.539,P=0.000)、空腹胰岛素(r=-0.291,P=0.040)、IRI(r=-0.334,P=0.018)之间呈负相关,与ISI呈正相关(r=0.297,P=0.037)。多元逐步回归分析显示,收缩压、腰围是影响脂联素水平的独立危险因素。结论原发性高血压患者血清脂联素水平下降,且与收缩压、胰岛素抵抗具有一定的相关性。     

阻塞性睡眠呼吸暂停低通气综合征患者血清脂联素水平的研究

目的 探讨血清脂联素在阻塞性睡眠呼吸暂停低通气综合征(OSAHS)患者体内的变化。方法 选择伴有肥胖的OSAHS患者71例(肥胖OSAHS组)、不伴肥胖的OSAHS患者21例(非肥胖OSAHS组)、单纯性肥胖者26例(单纯性肥胖组)和健康成人22例(正常对照组)。其中肥胖OSAHS组和单纯性肥胖组的体重指数(BMI)均大于25,两组间BMI差异无显著性。肥胖OSAHS组又进一步分为轻度(26例)、中度(22例)和重度(23例)。均接受多导睡眠仪监测和放射免疫法测定血清脂联素水平。结果 正常对照组血清脂联素水平[(8.9±0.6)mg/L]显著高于单纯性肥胖组[(7.1±1.3)mg/L](P<0.05)、非肥胖OSAHS组[(5.4±0.6)mg/L,P<0.01]和肥胖OSAHS组[(5.0±1.0)mg/L,P<01]。与单纯性肥胖组的血清脂联素水平相比,无论肥胖OSAHS组或非肥胖OSAHS组均显著降低,差异有显著性(P<0.05)。肥胖OSAHS组与非肥胖OSAHS组的血清脂联素水平相比,差异无显著性(P>0.05)。肥胖OSAHS组与单纯性肥胖组的分析显示:血清脂联素水平与呼吸暂停低通气指数(AHI)(r=-0.78,P<0.01)、BMI(r=-0.21,P<0.05)、腰围(r=-O.36,P<0.01)和颈围呈负相关(r=-0.42,P<0.01),与最低脉搏血氧饱和度呈正相关(r=0.48,P<0.01)。结论 OSAHS患者中血清脂联素水平较正常对照和单纯肥胖者更低,除了腰围和颈围的因素     

老年高血压和代谢综合征血清脂联素水平变化及其意义

目的:探讨老年高血压和代谢综合症患者血清脂联素水平变化及其意义。方法:60例老年高血压患者、62例老年代谢综合症患者和30例正常老年对照者,检测血压、体重、身高、腰围、空腹血糖、胰岛素、游离脂肪酸、血清脂联素、高敏C反应蛋白、尿素氮、肌酐,计算体重指数,测尿微量蛋白。结果:(1)高血压组和代谢综合症组脂联素水平明显低于正常对照组(P<0.05),体重指数、腹围、尿微量蛋白、游离脂肪酸、血糖、胰岛素、肌酐水平均高于对照组(P<0.05);(2)直线相关分析表明,血清脂联素水平与血压、尿微量蛋白、体重指数、腰围均成负相关(r=-0.230~-0.304,P<0.05~<0.01)。结论:代谢综合症和单纯高血压老年患者脂联素水平降低,且脂联素水平与血压、BMI、腰围及尿微量蛋白呈负相关。     

血清脂联素与肥胖的关系

目的　探讨中国人血清脂联素水平与肥胖及肥胖类型的关系。方法　对 390名居住上海地区中国人应用MRI测定局部体脂,放射免疫分析法测定血清脂联素水平。结果　 ( 1 )女性血清脂联素水平显著高于男性(P<0. 01)。(2)超重 /肥胖者血清脂联素水平较正常体重者显著下降〔男性 (8. 59±0. 64)mg/Lvs (10. 73±0. 95)mg/L(P<0. 05); 女性 (11. 42±0. 58)mg/Lvs (13. 59±0. 84)mg/L(P<0. 05)〕,腹内型肥胖者血清脂联素水平较非腹内型肥胖者显著下降〔男性(8. 32±0. 82)mg/Lvs(9. 58±0. 99)mg/L(P<0. 05);女性(10. 74±0. 58)mg/Lvs(12. 16±0. 88)mg/L(P<0. 05)〕。(3)多元逐步回归表明,无论性别,腰臀比、腹部脂肪面积 /股部脂肪面积 (VA SA/FA)、低密度脂蛋白胆固醇、HOMA IR是血清脂联素水平的独立相关因素,表现为两者之间的负性影响。结论　血清脂联素水平存在性别差异;腹内型肥胖者伴有显著的低脂联素血症;血清脂联素与腹内型肥胖、胰岛素抵抗指数显著负相关。     

血清脂联素水平与肥胖度的关系

目的 研究上海地区人群血清脂联素(adiponeetin)水平与年龄、性别、体脂及血清瘦素水平的关系。方法 用放射免疫分析法测定104例正常非肥胖和57例超重或肥胖个体[体重指数(BMI)≥25kg/m~2]的血清脂联素水平。结果 正常非肥胖者脂联素男性(10.15±6.33)mg/L,女性(13.82±6.09)mg/L;超重或肥胖者脂联素男性(5.78±3.55)mg/L,女性(8.13±4.32)mg/L。正常女性血清脂联素水平高于男性,肥胖及超重个体血清脂联素水平显著低于正常人。脂联素浓度与BMI、腰围和体脂％呈显著负相关,与血清瘦素呈负相关,但扣除体脂因素后两者并尤明显相关性。在本年龄段中,脂联素与年龄关系不大。结论 脂联素作为脂肪细胞分泌的一种激素蛋白,其浓度变化可能与肥胖及其相关疾病密切相关,表明脂联素的增加可能是有益的。     

2型糖尿病合并肥胖患者脂联素水平与胰岛素抵抗的相关性

目的 研究2型糖尿病合并肥胖患者脂联素水平和胰岛素抵抗之间的相关性,探讨脂联素在2型糖尿病合并肥胖患者发生胰岛素抵抗中的作用.方法 选择30例2型糖尿病合并肥胖患者、25例2型糖尿病患者及25例非糖尿病对照人员(其中13例为肥胖者),检测体质指数、腰/臀比值、空腹血糖、糖化血红蛋白、血清空腹胰岛素、血脂、脂联素水平,计算胰岛素抵抗指数和胰岛素敏感指数.分析血清脂联素与胰岛素抵抗的相关性.结果 (1)糖尿病肥胖组的检测体质指数、糖化血红蛋白、空腹血糖、胰岛素抵抗指数、血清空腹胰岛素、腰/臀比值均高于对照肥胖组,脂联素、胰岛素敏感指数低于对照肥胖组(P<0.05).(2)糖尿病非肥胖组甘油三酯、糖化血红蛋白、空腹血糖、胰岛素抵抗指数、血清空腹胰岛素均高于对照非肥胖组,胰岛素敏感指数、脂联素低于对照非肥胖组(P<0.05).(3)糖尿病肥胖组甘油三酯、胆固醇、体质指数、糖化血红蛋白、空腹血糖、胰岛素抵抗指数、血清空腹胰岛素、腰/臀比值均高于糖尿病非肥胖组,胰岛素敏感指数、脂联素低于糖尿病非肥胖组(P<0.05).结论 脂联素与2型糖尿病肥胖患者的胰岛素抵抗发生有关,脂联素降低易导致胰岛素抵抗,脂联素水平可作为2型糖尿病合并肥胖患者发生胰岛素抵抗的监测标准.     

超重、肥胖患者血清抵抗素、脂联素的水平变化

目的 探讨在超重和肥胖患者血清抵抗素和脂联素的水平及其影响因素.方法 37例正常体重者、21例超重和24肥胖患者常规测量血压、体重、身高,计算体重指数,抽取空腹静脉血检测其血糖、血脂、胰岛素、IL-6、C-反应蛋白、肿瘤坏死因子(TNF)-α、瘦素、脂联素、抵抗素以及服糖后2小时血糖.结果 与正常体重人群相比,超重人群中血清抵抗素和脂联素水平正常;在肥胖患者中血清抵抗素水平升高[(16.03±8.59)vs( 10.62±6.97)ng/ml,P =0.037],脂联素水平正常.超重人群中,血清抵抗素与脂联素(r=0.473,P=0.030)、年龄(r=0.437,P-0.047)正相关,脂联素与瘦素(r =0.481,P=0.027)正相关;在肥胖人群中,血清抵抗素与年龄(r=0.476,P=0.019)正相关,脂联素与收缩压(r=0.409,P=0.047)、HDL-C(r=0.463,P=0.023)正相关.结论 在肥胖患者中,血清抵抗素增高,与年龄有关,脂联素水平正常,与收缩压、HDL-C相关.     

超重及肥胖患者血清抵抗素与脂联素水平

目的 探讨在超重及肥胖患者中抵抗素和脂联素水平.方法 体质量正常者58例和超重及肥胖患者24例常规测量血压、体质量、身高,计算体质量指数,抽取空腹静脉血检测其血糖、血脂、空腹胰岛素、白介素6(IL-6)、C反应蛋白、肿瘤坏死因子α(TNF-α)、瘦素、脂联素、抵抗素以及服糖后2 h血糖.结果 与体质量正常者相比,超重及肥胖患者,抵抗素水平升高[(16.0±8.6 vs 11.6±9.0)μg/L,P=0.047],女性脂联素水平高于男性[(12.3±6.9 vs 8.3±5.1)mg/L,P=0.003].在体质量正常者中,抵抗素与TNF-α(r=0.357,P=0.006)正相关,与高密度脂蛋白胆固醇(HDL-C)(r=0.283,P=0.031)正相关;超重及肥胖患者中,抵抗素与年龄(r=0.476,P=0.019)正相关,与C肽(r=-0.459,P=0.024)负相关,脂联素与HDL-C(r=0.463,P=0.023)、收缩压(r=0.409,P=0.047)正相关.结论 在超重及肥胖患者中,抵抗素水平升高,而脂联素水平下降.脂联素在女性中水平升高,与HDL-C正相关.     

高血压病超重及肥胖患者血清脂联素水平和IL-6含量的变化

目的研究高血压病超重及肥胖患者血清脂素水平、白介素-6(IL-6)含量的变化及其临床意义。方法63名正常非肥胖对照(男31名,女32名)和57名体重指数>25kg/m2的单纯性超重肥胖个体和41名高血压病超重肥胖患者进入研究,测量血压(BP)、体重指数(BMI)、腰围(WC)、腰臀围比(WHR),用ELISA法检测所有研究对象血清脂联素浓度、血清IL-6含量。结果单纯性超重肥胖患者与高血压超重病肥胖患者血清脂联素水平显著低于正常对照者[单纯性超重肥胖男性(7.03±1.67)mg/L,高血压病超重肥胖男性(6.13±1.74)mg/Lvs正常对照男性(8.21±0.93)mg/L,t=3.868,t=5.388,均P<0.01;单纯性超重肥胖女性(7.90±1.35)mg/L,高血压病超重肥胖女性(6.97±1.16)mg/Lvs正常对照女性(9.22±0.68)mg/L,t=4.612,t=7.167,均P<0.01]。高血压病超重肥胖男性血清IL-6含量显著高于正常对照男性[高血压病超重肥胖男性(394.86±353.9)pg/mlvs正常对照男性(248.02±223.2)pg/ml,t=2.368,P<0.05;高血压病超重肥胖女性(303.2±283.6)pg/mlvs正常对照女性(230.5±214.2)pg/ml,t=0.9046,P>0.05]。在高血压病超重肥胖患者中,脂联素与体重指数、腰围、腰臀围比、收缩压之间呈显著负相关;IL-6与收缩压之间呈显著正相关。结论脂联素水平下降与超重肥胖、血压之间存在一定的相关性;IL-6含量升高可能与高血压病有关。     

Adiponectin levels in women with polycystic ovary syndrome

Serum adiponectin levels were evaluated in 60 women with polycystic ovary syndrome (PCOS), 30 normal-weighted and 30 obese women, and 60 healthy women age and body mass index (BMI) matched with the patients. The homeostasis model assessment (HOMA) score was also calculated. Both in PCOS and controls, serum adiponectin levels were significantly (P < 0.05) lower in obese than normal-weight women, without any difference between PCOS and controls. The HOMA score was significantly (P < 0.05) higher in obese than normal-weight women both in PCOS and controls; additionally, the HOMA score was significantly (P < 0.05) higher in normal-weight PCOS than normal-weight controls. Both in PCOS and controls, adiponectin levels were significantly correlated with BMI (r = -0.51, P < 0.01 in PCOS; r = -0.45, P < 0.01 in controls) and HOMA values (r = -0.39, P < 0.05 in PCOS; r = -0.35, P < 0.05 in controls); HOMA was correlated with BMI (r = 0.51, P < 0.01 in PCOS, r = 0.61, P < 0.001 in controls). In conclusion, our results confirm that adiponectin concentrations change according to variations of fat mass. They further suggest that insulin sensitivity per se probably does not play any pivotal role in the control of adiponectin levels in PCOS women.     

非酒精性脂肪性肝病患者血清瘦素和脂联素与胰岛素抵抗的关系

目的 探讨非酒精性脂肪性肝病(NAFLD)患者血清瘦素、脂联素的变化及其与胰岛素抵抗的关系. 方法 选取NAFLD患者60例,同期门诊体检健康者60名为对照组,ELJSA法测定血清瘦素、脂联素水平,并检测体质量指数、腰臀比、甘油三酯、总胆固醇、高密度脂蛋白胆固醇(HDL-C)、空腹血糖、ALT、AST、γ-谷氨酰转肽酶(GGT),稳态模型评估的胰岛素抵抗指数(HOMA-IR).采用SPSS10.0软件包进行统计学分析,计量资料差异性比较用方差分析和t检验,多因素相关性用Spearman分析和Logistic回归分析. 结果 血清瘦素、脂联素水平NAFLD组分别为(12.37±1.99)μg/L和(12.69±2.83)mg/L,对照组分别为(5.20±1.03)μg/L和(22.83±4.61)mg/L,t值分别为24.661和14.516,P值均<0.01;HOMA-IR,NAFLD组为4.86±0.63,对照组为1.91±0.41,t值为30.451,P<0.01.Logistic多因素回归分析显示瘦素与腰臀围之比、HOMA-IR、空腹血糖呈独立正相关,β值分别为8.175、0.974和0.564,P值均<0.01;脂联素与HOMA-IR、体质量指数呈独立负相关,β值分别为-0.495和-0.314,P值均<0.01.结论 NAFLD患者血清瘦素、脂联素的变化与胰岛素抵抗有关.     

Adiponectin, insulin resistance, and C-reactive protein in postpubertal Asian Indian adolescents

High-sensitivity C-reactive protein (hs-CRP) levels are closely associated with adiposity and predict coronary heart disease and type 2 diabetes mellitus. However, relationships of CRP to adiponectin and other markers of insulin resistance have been inadequately researched in children. We measured fasting serum levels of adiponectin, insulin, hs-CRP, and lipoproteins, and recorded the anthropometric profile and percentage of body fat (%BF; bioimpedance method) in 62 (36 normal weight, 26 overweight) healthy, urban, postpubertal Asian Indian males (aged 14 to 18 years). Serum levels of adiponectin were lower (P = not significant [NS]), whereas those of fasting insulin (P = .01) and hs-CRP (P = .02) were higher in overweight subjects. Adiponectin levels inversely correlated with body mass index (BMI; r = -0.26, P < .05), %BF (r = -0.24, P < .05), fasting insulin (r = -0.32, P < .05) and insulin resistance measured by the homeostasis model of assessment (HOMA-IR; r = -0.31, P < .05), but not with hs-CRP levels. Fasting insulin and hs-CRP levels correlated significantly with BMI, %BF, waist circumference (WC), waist-to-hip circumference ratio (W-HR), and triceps and subscapular skinfold thickness. The correlation of adiponectin with insulin sensitivity was independent of abdominal obesity, but became nonsignificant after controlling for BMI and %BF. Further, BMI was an independent predictor of adiponectin levels and the ratio of adiponectin and %BF was an independent predictor of fasting insulin levels. Although adiponectin levels did not correlate with hs-CRP levels, we observed dichotomous relationships of adiponectin and hs-CRP levels with generalized and abdominal obesity, respectively. We conclude that generalized obesity affects the adiponectin-insulin relationship in postpubertal Asian Indian males; however, the relationship of adiponectin with hs-CRP needs further evaluation.     

Relationship of thyroid function with body mass index, leptin, insulin sensitivity and adiponectin in euthyroid obese women

BACKGROUND: A possible relationship between thyroid hormones and adipose tissue metabolism in humans has been suggested. Aim of the study We sought to evaluate thyroid function and its possible relationship with body mass index (BMI), leptin, adiponectin and insulin sensitivity in euthyroid obese women. MATERIALS AND METHODS: Eighty-seven uncomplicated obese women (mean age 34.7 +/- 9 years, mean BMI 40.1 +/- 7 kg/m(2)) were studied. Levels of TSH, free thyroxine (FT4), free triiodothyronine (FT3), plasma adiponectin and leptin were evaluated. Insulin sensitivity was assessed by euglycaemic hyperinsulinaemic clamp (M index), fasting insulin and HOMA-IR. RESULTS: Uncomplicated obese women with BMI > 40 kg/m(2) showed higher serum TSH than obese subjects with BMI < 40 kg/m(2) (P < 0.01). TSH was correlated with BMI (r = 0.44, P = 0.01) leptin (r = 0.41, P = 0.01), leptin/BMI ratio (r = 0.33, P = 0.03), body surface area (r = 0.26, P = 0.05), HOMA-IR (r = 0.245, P = 0.05) and inversely with adiponectin (r = -0.25, P = 0.05) and M index (r = -0.223 P = 0.05). CONCLUSIONS: Our data show that, although thyroid function was normal in the studied obese population, TSH and BMI were positively related. TSH has been found to be correlated also with leptin adjusted for BMI. TSH could represent a marker of altered energy balance in severe, but uncomplicated obese women.     

超重/肥胖与2型糖尿病患者血清热休克蛋白70水平及其相关因素分析

目的 探讨热休克蛋白70（HSP70）在T2DM及肥胖发生发展中的可能作用. 方法 选取T2DM组71例和糖调节正常（NGR）组63名,根据BMI分为超重/肥胖（OW/OB）及体重正常（NW）亚组,检测各亚组SBP、DBP、WC、FPG、2 hPG、FIns和HSP70等指标,计算BMI、WHR、体内脂肪含量（BF％）和胰岛素抵抗指数（HOMA-IR）. 结果 T2DM组血清HSP70水平低于NGR组[（545.89±165.27） vs （666.49±251.73） pg/ml,P＜0.01].OW/OB组血清HSP70水平低于NW组[（544.72±147.39） vs （658.75±258.56） pg/ml,P＜0.01].血清HSP70水平与BMI、SBP、DBP、WC、FPG、2 hPG、BF％和HOMA-IR均呈负相关（r=-0.403、-0.301、-0.328、-0.327、-0.256、-0.259、-0.349、-0.244,P均＜0.01）.BMI、FPG是血清HSP70水平的独立相关因素. 结论 肥胖及新诊断T2DM患者血清HSP70水平降低,与FPG、BMI独立相关.     

Relationship of adiponectin to serum paraoxonase 1

Correlation of the plasma levels of insulin-sensitizing, anti-inflammatory and anti-atherosclerotic adiponectin with HDL has been demonstrated. However, its relation to HDL-bound paraoxonase 1 (PON1) has not been clarified. The association of serum PON1 activity with findings of metabolic syndrome was investigated in three age and sex-matched groups: (1) non-diabetic overweight subjects with BMI 28-39.9 kg/m(2) (n=25); (2) non-diabetic obese subjects with BMI>or=40 kg/m(2) (n=25); and (3) healthy, normal-weight controls (n=24). Of the parameters investigated, PON1 activity correlated positively with concentrations of HDL-C and adiponectin, and correlated negatively with BMI, waist circumference, systolic BP, levels of HbA(1C), and insulin, HOMA-IR, and TBARS. The positive correlation between adiponectin and PON1 remained significant even after adjustments for age, gender, BMI, blood pressure, HOMA-IR, HDL-C, LDL-C, and lipid peroxidation. CONCLUSIONS: PON1 activity shows negative association with markers of metabolic syndrome. We demonstrate that adiponectin is an independent variable of serum PON1, which may contribute to the anti-atherosclerotic effect of adiponectin.     

Relationship of salivary adipocytokines,diet quality,physical activity,and nutrition status in adult Emirati females in United Arab Emirates

AimsThe United Arab Emirates (UAE) ranks as the fifth most obese country with increasing cardio-metabolic risks. In this paper, relationships of salivary adipocytokines (markers of cardio-metabolic syndrome), diet quality and physical activity in 90 normal-weight, overweight and obese (30 subjects in each group) Emirati adult females were investigated.MethodsA cross-sectional research design was adopted. Anthropometric measurements, diet quality and physical activity questionnaires were administered. Overnight fasting saliva was collected to determine levels of adiponectin, interleukin-10 (IL-10) and tumor necrosis factor-alpha (TNF-α).ResultsSalivary adiponectin was significantly lower, while TNF-α was higher in obese than normal-weight subjects. IL-10 displayed a lower trend in obese subjects. Though diet quality and physical activity did not exhibit significant differences among the three groups, better diet quality and higher physical activity level were reported among normal-weight subjects. Salivary TNF-α correlated positively with body mass index (BMI) (r = 0.37; p < 0.001) and waist circumference (r = 0.31; p < 0.001), while adiponectin correlated negatively with BMI (r = −0.28; p < 0.05). IL-10 showed negative trend in correlation with obesity measures. Correlations were not observed between diet quality and physical activity with salivary adipocytokines. Interestingly, a significant negative correlation emerged between diet quality and neck circumference (r = −0.24; p < 0.05).ConclusionOur findings demonstrate that salivary adipocytokines correlate with obesity measures and can serve as convenient adjunct method in predicting cardio-metabolic risks in the population.     

Adiponectin is independently associated with insulin sensitivity in women with polycystic ovary syndrome

OBJECTIVE: The polycystic ovary syndrome (PCOS) is associated with obesity and insulin resistance predisposing to diabetes mellitus type 2 and atherosclerosis. Adiponectin is a recently discovered adipocytokine with insulin-sensitizing and putative antiatherosclerotic properties. The aim of the study was to elucidate determinants of circulating adiponectin levels and to investigate the potential role of adiponectin in insulin resistance in PCOS women. PATIENTS AND MEASUREMENTS: Plasma adiponectin and parameters of obesity, insulin resistance and hyperandrogenism were measured In 62 women with PCOS and in 35 healthy female controls. RESULTS: Both in PCOS and controls, adiponectin levels were lower in overweight or obese women than in normal-weight women, without any difference between PCOS and controls after adjustment for body mass index (BMI). In PCOS and in controls there was a significant correlation of adiponectin with BMI (r = -0.516, P < 0.001), fasting insulin (r = -0.404, P < 0.001), homeostasis model sensitivity (HOMA %S) (r = -0.424, P < 0.001) and testosterone (r = -0.279, P < 0.01), but no correlation with androstenedione (r = -0.112, P = 0.325), 17-OH-progesterone (r =-0.031, P = 0.784) or the LH/FSH ratio (r =-0.033, P = 0.753). Multiple linear regression analysis revealed that BMI and HOMA %S but not testosterone were independently associated with adiponectin plasma levels, explaining 16% (BMI) and 13% (HOMA %S) of the variability of adiponectin, respectively. In PCOS patients insulin sensitivity, as indicated by continuous infusion of glucose with model assessment (CIGMA %S) was significantly correlated with adiponectin (r = 0.55; P < 0.001), BMI (r =-0.575; P < 0.001), waist-to-hip ratio (WHR) (r =-0.48; P = 0.001), body fat mass assessed by dual-energy X-ray-absorptiometry (DEXA) [Dexa-fat (total) (r = -0.61; P < 0.001) and Dexa-fat (trunk) (r = -0.59; P < 0.001)] and with testosterone (r = -0.42; P = 0.001). Multiple linear regression analysis demonstrated that markers of obesity such as BMI, total or truncal fat mass, age and adiponectin were independently associated with CIGMA %S, and that circulating adiponectin accounted for about 18% of the degree of insulin resistance in PCOS. By contrast, testosterone was not a significant factor, suggesting that PCOS per se did not affect insulin sensitivity independent from obesity, age and adiponectin. Metformin treatment for 6 months in insulin-resistant PCOS women (n = 9) had no effect on plasma adiponectin (P = 0.59) despite significant loss of weight and fat mass and improvement in hyperandrogenaemia. CONCLUSIONS: PCOS per se is not associated with decreased levels of plasma adiponectin. However, circulating adiponectin is independently associated with the degree of insulin resistance in PCOS women and may contribute to the development and/or maintenance of insulin resistance independent from adiposity.     

Changes of serum omentin-1 levels in normal subjects,type 2 diabetes and type 2 diabetes with overweight and obesity in Chinese adults

Purpose

Omentin-1 has been identified as interesting novel adipokines that may modulate insulin action. Its exact biological function is unclear. The aim of this study is to assay the levels of serum omentin-1 in normal subjects and type 2 diabetes mellitus (T2DM) with normal weight, overweight and obesity and to analyze the relationship between serum omentin-1 levels with body mass index (BMI), waist to hip ratio (WHR), glycosylated hemoglobin (HbA1c), plasma glucose, insulin resistance index (HOMA-IR) and serum lipid levels.

Methods

There are eighty newly diagnosed type 2 diabetes patients, thirty-five type 2 diabetes patients with normal weight, twenty-nine type 2 diabetes patients with overweight, sixteen type 2 diabetes patients with obesity, and forty healthy control subjects were enrolled in this study. The levels of plasma glucose at fasting and 2-hour postprandial blood glucose and fasting serum levels of insulin, omentin-1and HbA1c were measured. HOMA-IR was calculated.

Results

Serum omentin-1 levels were found to be significantly decreased in type 2 diabetes patients with normal weight (821.16 ± 312.50 ng/L), in type 2 diabetes patients with overweight (748.00 ± 322.51 ng/L), and in type 2 diabetes patients with obesity (530.44 ± 357.35 ng/L) compared with healthy control subjects (994.71 ± 435.90 ng/L) at P < 0.05. The level of serum omentin-1 was negatively correlated to BMI, HOMA-IR, WHR, fasting insulin (FINS), fasting plasma glucose (FPG), 2-hour postprandial blood glucose (2HPG), triglycerides (TG), and positively correlated to high-density lipoprotein (HDL). BMI was independent related factor that influenced the levels of serum omentin-1.

Conclusion

Decreased omentin-1 levels may contribute to the development of insulin resistance, T2DM and particularly to obesity in Chinese adults, however, its role in these diseases needs to be fully elucidated.