腹部和大腿皮下脂肪组织抵抗素蛋白的表达

背景:抵抗素是脂肪细胞分泌的一种多肽激素。而中心性肥胖时可引起胰岛素抵抗和导致2型糖尿病。目的:比较正常人腹部和大腿皮下脂肪组织抵抗素蛋白表达的情况,探讨抵抗素在中心性肥胖引起胰岛素抵抗中的作用。设计:对照观察实验。单位:华中科技大学同济医学院附属同济医院内分泌科。对象:选择2003-01/04华中科技大学同济医学院附属同济医院外科住院患者20例,根据留取脂肪组织的部位分腹部皮下脂肪组织组12例和大腿皮下脂肪组织组8例。方法:①所有患者测量血压、身高、体质量,计算体质量指数,体内脂肪百分比(按白种人数据推导的公式):男性=1.2×体质量(kg) 身高-2(m-2) 0.23×年龄-16.2;女性=1.2×体质量(kg) 身高-2(m-2) 0.23×年龄-5.4。②葡萄糖氧化酶法测定空腹血糖。③留取的脂肪组织标本用单去污裂解液提取脂肪组织中的蛋白质,考马斯亮蓝法测定蛋白质浓度,Western-blot测量脂肪组织抵抗素蛋白的表达水平。主要观察指标:两组患者的血压、体质量指数,体内脂肪百分比,空腹血糖,抵抗素蛋白的表达水平。结果:纳入患者20例,均进入结果分析。①两组的空腹血糖、收缩压、舒张压、体质量指数、体内脂肪百分比差异无显著性(P>0.05)。②腹部皮下脂肪组织抵抗素蛋白表达(A)为14942±6076,明显高于大腿皮下脂肪组织组39421±6087,二者比较差异显著(P<0.01)。结论:抵抗素蛋白在腹部皮下脂肪组织的表达高于腿部皮下脂肪组织,此结果对中心性肥胖并引起胰岛素抵抗和2型糖尿病的发生具有参考价值。

Expression of resistin protein in abdominal and thigh subcutaneous adipose tissues

BACKGROUND: Resistin is an adipocyte-derived polypeptides. While central obesity can result in insulin resistance and type 2 diabetes mellitus.OBJECTIVE: To compare the expression of resistin protein in subcutaneous adipose tissue of normal human abdominal and thigh, and to investigate the role of resistin in central obesity bringing insulin resistance.DESIGN: Controlled observational experiment.SETTING: Department of Endocrinology, Tongji Hospital Affiliated to Tongji Medical College, Huazhong University of Science and Technology.PARTICIPANTS: Totally 20 patients hospitalized between January and April 2003 at the Department of Surgery of Tongji Hospital Affiliated to Tongji Medical College, Huazhong University of Science and Technology were selected. All cases were divided into abdominal fat group with 12 cases and thigh fat group with 8 cases based on the site of fat tissue.METHODS: ①Blood pressure, height, body mass were measured and body mass index (BMI), percentage of body fat (BF%) in vivo (according to formulas induced by data from white people) were calculated: Male=1.2×body mass (kg)+height-2 (M-2)+0.23×age-16.2; Female =1.2× body mass (kg)×height-2 (m-2)+0.23×age-5.4. ②Fasting blood glucose was measured with glucose oxidase assay. ③Protein was isolated with lysis buffer and protein concentration was identified with Bradford method; The expression of resistin protein was measured with Western-blot method.MAIN OUTCOME MEASURES: Blood pressure, BMI, BF%; fasting blood glucose and expression of resistin protein of all cases of the two groups.RESULTS: Totally 20 patients were involved the result analysis. ①There were no significant difference in fast blood glucose, systolic blood pressure (SBP), diastolic blood pressure (DBP), body mass index (BMI) and BF%between two groups (P ＞ 0.05). ②Expression levels (A) of resistin protein in abdominal subcutaneous adipose tissues was (14 942±6 076), which was more higher than that in thigh subcutaneous adipose tissues (39 421±6 087). There was markedly significant difference (P ＜ 0.01).CONCLUSION: The expression of resistin protein is much greater in abdominal fat depots than in thigh fat depots, which has evaluative value for studying the episode of central obesity-induced insulin resistance and type 2 diabetes mellitus.