减肥运动处方对肥胖青年女性血浆瘦素及抵抗素水平的影响(英文)

研究16周减肥运动处方对肥胖青年女性身体成分及血浆瘦素及抵抗素水平的影响.选取呼和浩特市英派斯健身俱乐部女性会员18名,体重指数≥25 kg/m2,按设定的减肥运动处方锻炼16周(每周3次,每次70 min,最大心率的60%~70%),锻炼前后分别测体重(W)、体重指数(BMI)、体脂含量(FM),体脂百分比(F%)、血浆瘦素(leptin)和抵抗素(resistin)水平.结果显示,16周锻炼后,肥胖者的体重、体重指数、体脂含量、血浆瘦素和抵抗素水平均显著下降,并且锻炼前后血浆瘦素和抵抗素水平的下降与体重、体重指数、体脂含量、体脂百分比的下降呈正相关.16周减肥运动处方锻炼对肥胖青年女性的身体成分有很好的改善作用,对与肥胖有关的激素及因子的异常有一定的改善作用.血浆瘦素和抵抗素水平的变化可以作为评价减肥效果和运动处方有效性的一个指标.     

模拟高住低训对足球运动员血清瘦素和血脂的影响

探讨模拟高住低训对足球运动员体重、血脂及瘦素的影响.结果是实验前后实验组体重有显著性降低;血脂各项指标实验组和对照组都无显著性差异;瘦素含量实验组在第3周和第4周同入住前比较有显著性差异,但组间无显著性差异,对照组各时间点都无显著性差异.4周的间歇低氧和运动的双重刺激可明显降低足球运动员体重;对运动员血脂各项指标没有显著影响;可显著提高运动员的血清瘦素水平.     

Leptin, but not a β3-adrenergic agonist, upregulates muscle uncoupling protein-3 messenger RNA expression: short-term thermogenic interactions

The short-term effects of leptin and a β₃-adrenoceptor agonist on thermogenesis and expression of uncoupling proteins (UCPs) in brown adipose tissue (BAT) and muscle and their possible interactions were assessed. One hour after administration of the β₃-adrenoceptor agonist Trecadrine, a statistically significant increase in UCP1 messenger RNA (mRNA) expression in BAT was observed, whereas UCP2 and UCP3 in both BAT and gastrocnemius muscle were unaffected. Leptin induced an upregulation of UCP3 mRNA in muscle, with no changes in BAT UCP1 mRNA. A statistical interaction was found between leptin and Trecadrine in rectal temperature. The present study provides evidence, for the first time, of the induction of UCP3 mRNA expression in skeletal muscle by leptin in nongenetically obese animals. Received 5 March 1999; received after revision 19 April 1999; accepted 21 April 1999     

新生儿脐血瘦素水平的初步研究

目的:研究脐血瘦素水平与新生儿性别、孕周、出生体重、身高、体重指数及胎盘重量的关系。方法:应用酶联免疫法(ELISA)测定脐血瘦素水平,共测定了46份样本,运用统计学方法分析其与新生儿性别、孕周、出生体重、身高、体重指数BMI(即体重除以身高的平方,单位为kg·m~(-2)及与胎盘重量等的关系。结果:脐血瘦素水平与出生体重、身高、体重指数及胎盘的重量有着显著性相关,而男女性别间脐血瘦素水平无显著性差异。结论:脐血瘦素水平与新生儿孕周、出生体重、身高、体重指数及胎盘重量有密切关系,临床测定脐血瘦素水平对预测胎儿出生体重和生长发育有重要意义。     

酒精性肝病患者瘦素水平与肝功能的相关性

目的 探讨瘦素在酒精性肝病(ALD)及不同阶段中的变化规律及其与肝功能受损的关系.方法 采用放射免疫法分别测定22例酒精性脂肪肝(AFD)、11例酒精性肝炎(AH)、13例酒精性肝硬化(AC)患者的血清瘦素水平,同时生化检测46例患者的肝功能,选择30例健康体检者作对照.结果 酒精性肝病患者血清瘦素水平(10.63±4.06 μg/L)明显高于正常对照组(4.98±2.89 μg/L),P<0.05,酒精性肝病患者血清瘦素水平与肝功能受损呈明显相关性.结论 测定血清瘦素水平可用于评估酒精性肝病的病情,对判断预后有参考价值.     

肥胖SD大鼠骨骼肌组织中SOCS-3mRNA的表达

目的：初步探讨肥胖sD大鼠骨骼肌组织SOCS-3mRNA的含量与高leptin血症的关系。方法：用高脂饮食制备饮食诱导的肥胖（DIO）SD大鼠模型，应用放射免疫分析法检测血清leptin水平，应用RT-PCR半定量检测骨骼肌组织中SOGS-3mRNA的含量，并进行相关分析。结果：DIO大鼠存在高leptin血症，但其骨骼肌组织中SOCS-3mRNA的含量与对照大鼠没有差别，而且骨骼肌组织中SOCS-3mRNA的含量与大鼠的肥胖程度及血清leptin水平没有相关性。结论：DIO大鼠的leptin抵抗与骨骼肌组织中SOCS-3mRNA的含量无关。     

大豆异黄酮对卵巢切除大鼠糖脂代谢和血清瘦素、抵抗素表达的影响

为探讨大豆异黄酮对卵巢切除大鼠糖脂代谢和血清瘦素、抵抗素表达的影响,将12周SD大鼠分成3组,假手术(Sham)组、卵巢切除(OVX)组和大豆异黄酮(OVX+Gen)组,每组7只,卵巢切除术后10 d,OVX组和Sham组大鼠每天腹腔注射生理盐水0.1 ml/只,OVX+Gen组每天注射大豆异黄酮0.2 mg/只,连续注射30 d后处死取血,检测子宫病理改变、血糖血脂和胰岛素水平、血清瘦素和抵抗素含量.结果发现卵巢切除后大鼠总胆固醇、HDL和LDL均增加(P<0.05),但胰岛素、血糖、甘油三酯、血清瘦素和抵抗素水平变化不明显(P>0.05);卵巢切除后补充大豆异黄酮,可促进子宫内膜上皮部分增生,但胰岛素、血糖、总胆固醇、甘油三酯、LDL和HDL、血清瘦素和抵抗素水平均无明显变化(与OVX组相比,P>0.05),结果提示大豆异黄酮对卵巢切除大鼠糖脂代谢参数和血清瘦素、抵抗素水平影响不大.     

Pancreastatin,a chromogranin A-derived peptide,inhibits leptin and enhances UCP-2 expression in isolated rat adipocytes

Leptin, the ob gene product, is an adipocyte-secreted hormone that centrally regulates weight by decreasing caloric intake and increasing energy expenditure. Expression of leptin is regulated by dietary status, insulin, glucocorticoids and catecholamines. Pancreastatin (PST), a chromogranin A-derived peptide, correlates with catecholamine levels, and may play a role in the physiology of stress, modulating endocrine secretion and metabolism. Thus, PST has been found to exert a lipolytic and anti-insulin effect in white adipocytes. The aim of the present work was to investigate a possible role of PST modulating the expression of key genes involved in lipid storage and metabolism: leptin, PPAR-2, UCP-1 and UCP-2. We incubated isolated rat epididymal adipocytes with 100 nM PST for 16 and 24 h. Leptin, UCP-2 and UCP-1 mRNA levels were assessed by RT-PCR, followed by Southern blot. Leptin secretion was also measured by ELISA. PST inhibited leptin expression and secretion at 16-h incubation, but this effect was no longer observed after 24 h. On the other hand, PST stimulated the expression of UCP-2 after 16 h. However, the effect was still significant after 24 h. The inhibitory effect of PST on leptin expression and secretion and the stimulation of UCP-2 expression were prevented by blocking PKC. UCP-1 and PPR-2 expression did not change after PST stimulation. Leptin differentially regulates the expression of key genes in the rat adipocyte, upregulating the expression of UCP-2 and inhibiting the expression and secretion of leptin by a mechanism that involves PKC activity. These effects may contribute to the metabolic action of catecholamines in physiological and pathophysiological conditions with increased sympathetic activity.Received 5 September 2003; received after revision 6 October 2003; accepted 14 October 2003     

有氧运动对大鼠血清瘦素的时相性影响及与脂蛋白代谢的关系

探讨了有氧运动对大鼠血清瘦素(1eptin)的时相性影响及与脂蛋白代谢的关系.将SD大鼠分为安静对照组(C)和有氧运动后即刻组(T0)2、4h组(T1)、48h组(T2)、72h组(T3)进行比较.与C组相比,有氧运动后,血清瘦素含量在T1、T2、T3组显著下降,血清HDL-C均显著升高,血清LDL-C均显著下降;通过对各组中的Leptin与HDL-C、LDL-C进行偏相关分析发现,C、T0、T1和T3无显著相关性,而T2组Leptin与HDL-C呈显著负相关,与LDL-C呈显著正相关.结果表明,有氧运动可引起大鼠血清瘦素发生时相性下降,同时使脂蛋白代谢向有益方向改变,且可持续数天,是预防代谢综合症的较佳方案;血清瘦素与血清脂蛋白代谢密切相关.     

女性甲亢患者血清瘦素水平与身体成分的相关性

目的:探讨女性甲亢患者血清瘦素水平的变化与其身体成分的相关关系.方法:采用放射免疫分析法(RIA)检测33例女性甲亢患者和12例女性正常对照者血清瘦素水平,同时应用双能X线吸收法(DXA)测量全身的骨矿盐含量(简称骨量)、脂肪量和肌肉量.结果:女性甲亢组血清瘦素水平与正常对照组比较差异无显著意义(P＞0.05).血清瘦素水平与全身骨量呈显著正相关(r=0.447,n=33,P＜0.01),与全身脂肪量(r=0.501,n=33,P＜0.01)呈显著正相关,与全身肌肉量无明显相关性(r=0.101,n=33,P＞0.05).结论:女性甲亢患者身体骨量和脂肪量的变化与血清瘦素水平明显相关.