葡萄糖和胰岛素对3T3-L1脂肪细胞内脏脂肪素mRNA表达的影响

目的研究不同浓度葡萄糖和胰岛素对3T3-L1脂肪细胞中内脏脂肪素（Visfatin）mRNA表达的影响。方法通过real—time RT-PCR方法检测不同浓度葡萄糖和胰岛素培养下3T3-L1脂肪细胞Visfatin mRNA的表达。结果葡萄糖增加了3T3-L1脂肪细胞Visfatin mRNA的表达;胰岛素降低其表达。结论葡萄糖和胰岛素对3T3-L1脂肪细胞中Visfatin mRNA的表达有凋控作用。     

血浆内脂素水平与成人肥胖及其代谢指标的相关性研究

目的研究血浆内脂素浓度与成人单纯性肥胖及其代谢指标的相关性.方法对171例健康体检者分为肥胖组（BMI≥25 kg/m）2和非肥胖组（BMI〈25 kg/m）2,分别测量身高、体重、腰围、臀围和血压,计算BMI和WHR;测定血清空腹葡萄糖（FPG）、空腹胰岛素（Fins）、总胆固醇（TC）、甘油三酯（TG）、低密度脂蛋白胆固醇（LDL-c）和高密度脂蛋白胆固醇（HDL-c）水平.采用酶免疫分析法测定空腹血浆内脂素水平,分析其与BMI、WHR和代谢指标间的相关性.结果 （1）肥胖组的BMI、WHR、FPG、Fins、UA均显著高于非肥胖组,HDL-c显著低于非肥胖组;（2）肥胖组空腹血浆内脂素浓度高于非肥胖组,差异无统计学意义（P〉0.05）;（3）肥胖组血浆内脂素水平与臀围、收缩压呈正相关.多元逐步回归分析结果表明,臀围是肥胖者血浆内脂素浓度的独立影响因素.结论肥胖者血浆内脂素浓度与非肥胖者无显著差异.臀围是肥胖者空腹血浆内脂素浓度的主要影响因素.     

Visfatin基因多态性与2型糖尿病、冠心病的相关性研究

目的:探讨内脂素(Visfatin)rs12537455位点单核苷酸多态性(SNPs)与2型糖尿病、冠心病的相关性。方法:收集陕西西安地区汉族人群286例受试对象,其中包括106例单纯2型糖尿病(T2DM)患者,40例2型糖尿病伴发冠心病(T2DM+CHD)患者,54例冠心病(CHD)患者和86例健康对照着(Control),采用标准化的聚合酶链反应-限制性片段长度多态性(PCR-RLFP)的方法进行rs12537455/Alu基因型的检测,比较各基因型检出率在上述人群中的差别。结果:以限制性内切酶Alu1酶切扩增含rs12537455片段,可产生CC,CT两种基因型和C,T两种等位基因,未能产生TT基因型,四组间基因型分布及等位基因频率比较有显著性差异;组间两两比较(采用Bonferroni法,校正检验水准α=0.05/6=0.008)显示T2DM+CHD组和CHD组与Control组和T2DM组rs12537455的基因型分布和等位基因频率比较有显著性差异。结论:rs12537455在陕西西安地区汉族人群中存在遗传变异,T等位基因频率越高,2型糖尿病患者并发冠心病的可能越小。T等位基因可能有心血管保护作用。     

Novel adipokines: links between obesity and atherosclerosis

Today, cardiovascular diseases (CVD) remain the principal cause of death in industrialized countries and are linked to obesity and metabolic syndrome. Metabolic syndrome is characterized by changes in arterial blood pressure, glucose metabolism, lipid and lipoprotein profiles in addition to inflammation. Adipose tissue produces many cytokines and secretory factors termed adipokines. Intra-abdominal (visceral) adipose tissue in particular, rather than peripheral, appears to be associated with global cardiometabolic risk. The present article summarizes information on five recently discovered adipokines: vaspin, visfatin, apelin, acylation stimulating protein (ASP) and retinol-binding protein 4 (RBP4) and their potential beneficial or deleterious roles in obesity and atherosclerosis. Vaspin may have antiatherogenic effects through its potential insulin-sensitizing properties. Similarly, visfatin has been suggested to enhance insulin sensitivity, but its potential role in plaque destabilization may counteract this. Apelin, via inhibition of food intake, and increases in physical activity and body temperature, may promote weight loss, resulting in a beneficial antiatherogenic effect. Further, favourable effects on vasodilatation and blood pressure add to this positive effect. Considering its increased levels in subjects with demonstrated atherosclerosis, RBP4 may constitute a biomarker. Lastly, ASP, often increased in obesity and metabolic disorders, may be contributing to efficient lipid storage, and decreasing or blocking ASP may provide a potential antiobesity target. Adipokines may further contribute to obesity-atherosclerosis relationships, the full understanding of which will require further research.     

重症肺炎患者血浆内脂素的变化及临床意义

目的 通过观察重症肺炎患者血浆内脂素(Visfatin)浓度变化,探讨Visfatin在重症肺炎中的作用以及在判断病情严重程度上的价值.方法 采用前瞻性观察研究,选取2009年6月至2010年6月期间住复旦大学附属上海市第五人民医院急诊科 ICU、普通病房的70例肺炎患者,其中重症肺炎组(A组)40例、非重症肺炎组(B组)30例,另选30名健康体检者为对照组(C组).所有入选者均排除严重心、脑、肾疾病,以及肿瘤、自身免疫系统疾病、1个月内特殊治疗史者.所有人群采用ELISA法检测血浆中Visfatin、白介素6(IL6)、白介素8(IL-8)、肿瘤坏死因子-α(TNF-α),采用免疫浊度法检测血浆CRP并测定血常规.肺炎患者再进行血气分析,并计算急性生理与慢性健康状况Ⅱ评分(APACHEⅡ评分).组间资料比较用采用成组t检验、方差分析或非参数检验,相关性分析用Pearson相关或Spearman秩相关.结果 A组血浆Visfatin显著高于B组和C组(P<0.01),B组高于C组(P<0.01).A组血浆中Visfatin水平与CRP、TNF-α、APACHEⅡ评分、PMN%呈正相关(rha=0.653,r=0.554,r=0.558,r=0.484,均P<0.05),与PaO2、PaO2/FiO2呈负相关(rha=-0.422,r=-0.543,均P<0.05).结论 Visfatin可能作为促炎因子参与重症肺炎的全身炎症反应,在重症肺炎病情严重程度判断中具有一定价值.

Abstract：

Objective To discuss the value of Visfatin in severity evaluation in patients with severe pneumonia via observation on the variations of the plasma level of Visfatin. Method Seventy subjects including 40 patients with severe pneumonia ( group A) and 30 patients with non-severe pneumonia (group B) admitted to the ICU of emergency department and general wards from June 2009 to June 2010, were enrolled in this prospective study, and another 30 healthy individuals from physical examinees were included as subjects in control group (group C). Patients with severe diseases of heart, brain and kidney, cancers, autoimmune disease, or under special treatment in latest one month were excluded. For the subjects of all three groups, the plasma levels of Visfatin, IL-6, IL-8 and TNF-α were measured by using ELISA, while the level of CRP was assayed by using immunoturbidimetry, and the routine blood test was performed as well. The blood gas analysis and Acute Physiology and Chronic Health Evaluation Ⅱ ( APACHE Ⅱ) were carried out in patients with pneumonia. Comparisons between groups were made by t-tests, ANOVA or nonparametric test. Correlation analysis was carried out by Pearson correlation coefficient or Spearman rank correlation test. Results The plasma level of Visfatin in patients with severe pneumonia (group A) was significantly higher than that in patients with non-severe pneumonia (group B) and in the control subjects (group C) (P < 0. 01) , and the level of Visfatin in pneumonia ( group B) and in control group (group C) , and that in group B was significantly higher than that in the controls (group C) (P <0. 01). In group A, the plasma level of Visfatin was positively correlated with CRP, TNF-α, APACHE Ⅱ and PMN% (rha =0. 653, r = 0.554, r = 0.558, r= 0.484, P <0. 05), while negatively correlated with PaO2 and PaO2/FiO2 ( rha = -0.422, r= -0.543, P <0. 05). Conclusions Visfatin may be involved in the systemic inflammation response in severe pneumonia as a pro-inflammatory cytokine which is valuable in assessing the severity of pneumonia.     

内脂素与肥胖和2型糖尿病的相关性研究进展

内脂素（visfatin）是新近发现的脂肪细胞因子,由内脏脂肪组织合成、分泌,与淋巴细胞分泌的前B细胞克隆增强因子结构相同,具有类胰岛素的降血糖作用,参与炎症应答、调节糖脂代谢和自分泌、旁分泌和内分泌等作用。研究发现内脂素与2型糖尿病密切相关,与肥胖、胰岛素抵抗及胰岛素分泌方面关系尤为显著。内脂素与2型糖尿病的关系可能是治疗肥胖和糖尿病的靶点,为研究胰岛素抵抗、糖尿病、肥胖提供新的思路和方法。     

血浆内脏脂肪素和脂肪细胞型脂肪酸结合蛋白与冠心病的关系

目的探讨血浆内脏脂肪素和脂肪细胞型脂肪酸结合蛋白浓度与冠心病的关系。方法经冠状动脉造影选取120例患者,用病变血管支数表示冠状动脉病变程度,酶联免疫吸附法测定患者血浆内脏脂肪素和脂肪细胞型脂肪酸结合蛋白浓度。结果血浆内脏脂肪素和脂肪细胞型脂肪酸结合蛋白浓度在冠心病组高于非冠心病组（P〈0．05）,在冠心病组双支病变高于单支病变（P〈0．05）,三支病变明显高于双支病变和单支病变（P〈0．05）。结论血浆内脏脂肪素和脂肪细胞型脂肪酸结合蛋白可能成为预测人类冠心病及冠状动脉病变程度的有用指标。     

Hormones of adipose tissue and their biologic role in lung cancer

Introduction

Adipose tissue secretes numerous bioactive peptides, collectively termed “adipocytokines” or “adipokines”. Adipokines act in a paracrine, autocrine, or endocrine manner and regulate several physiological and pathological processes. Increasing evidence indicates that adipokines are implicated also in several malignancies, including lung cancer as well.

Aim

The aim of this study is to summarize data concerning adipokines in lung cancer pathogenesis, prognosis and survival; the role of adipokines in lung cancer cachexia is also examined.

Materials and Methods

A systematic literature search was performed in the electronic database of Medline. Several studies and review articles met the inclusion criteria.

Results

Leptin and adiponectin are the best studied adipokines. The majority of the relevant studies has investigated the potential correlations mainly between leptin, adiponectin, and sometimes also resistin, and nutritional status, systemic inflammation of lung cancer or lung cancer cachexia and have also assessed their prognostic significance. Few other studies have studied genetic variations in leptin, leptin receptor and adiponectin genes and their association with lung cancer susceptibility and prognosis. The ongoing list of adipokines associated with lung cancer also includes resistin, chemerin, and visfatin.

Conclusions

Increasing evidence points to the involvement of certain adipocytokines in lung cancer development, progression and prognosis. No conclusive evidence exists so far with regards to the role of adipocytokines in lung cancer cachexia. Future, longitudinal studies are warranted in order to clarify the role of adipocytokines in lung cancer and also uncover adipocytokines as novel therapeutic targets.     

实验性糖尿病大鼠视网膜中Visfatin mRNA及蛋白表达研究

目的:研究糖尿病大鼠视网膜中Visfatin mRNA及蛋白表达情况,探讨Visfatin与糖尿病视网膜病变的关系。方法:建立链脲佐菌素(streptozotocin,STZ)诱导的糖尿病大鼠模型(实验组),同时设立正常对照组。饲养12wk后处死大鼠并取视网膜组织,采用冰冻切片免疫荧光染色法和RT-PCR法观察和检测Visfatin和VEGF mRNA及蛋白的表达情况。结果:对照组中Visfatin主要在神经纤维层中少量表达,但在实验组视网膜中Visfatin及VEGF的蛋白表达明显增强,特别是在Müller细胞中。Visfatin及VEGF表达部位一致。RT-PCR显示实验组中Visfatin及VEGF mRNA水平较正常对照组明显增高(P<0.01)。结论:糖尿病大鼠视网膜中Visfa-tin的表达增加,可能是导致增生性糖尿病视网膜病变(PDR)发展的重要因素之一,提示Visfatin在糖尿病视网膜病变发生过程中可能起重要作用。     

BVT.2733影响饮食诱导肥胖小鼠中Visfatin表达的研究

目的:构建高脂饮食诱导肥胖小鼠模型,观察BVT.2733在改善胰岛素抵抗中的作用及对Visfatin表达的影响?方法:构建高脂饮食诱导的肥胖小鼠模型,分为肥胖对照组和BVT.2733治疗组,肥胖对照组给予安慰剂?治疗组给予BVT.2733灌胃2周,同时设正常饮食的小鼠为正常对照组?放射免疫法测小鼠空腹胰岛素水平,生化法检测血糖,实时定量RT-PCR 检测内脏脂肪组织Visfatin的mRNA表达?观察各组小鼠脂肪组织的形态学变化?结果:与正常对照组相比,肥胖对照组小鼠脂肪细胞明显增大,体重增加,空腹血糖?血清胰岛素水平升高(P < 0.05)?与肥胖对照组相比,BVT.2733治疗组小鼠脂肪细胞体积减小,空腹血清胰岛素水平明显下降(P < 0.01),脂肪组织Visfatin mRNA表达显著降低(P < 0.05)?结论:BVT.2733能够降低体重,减少脂肪组织,并且降低Visfatin的表达水平?