抵抗素与病理性心肌肥厚的研究进展

心力衰竭是各种心血管疾病的终末阶段，而病理性心肌肥厚是心力衰竭进程的一个关键时期。研究发现抵抗素与病理性心肌肥厚的进展密切相关，其内在涉及多条信号传导通路。详细了解其相关机制，有助于寻找新的治疗靶点，延缓病理性心肌肥厚的进展。     

RELMs家族及其生物学功能研究进展

1RELMs家族成员及其结构特征自2001年发现小鼠抵抗素(resistin)具有胰岛素抵抗的生物学功能以来[1],RELMs家族成员相继被发现。目前,已发现的RELMs成员包括:小鼠和大鼠resistin、RELMα、RELMβ及RELMγ;猪resis-tin[2];人类resistin和RELMβ[3,4]。RELMs由105-114个氨基酸组成     

抵抗素在类风湿关节炎中的作用

虽然类风湿关节炎的发生与炎症有着密不可分的关系,但肥胖现象越来越多的发生在类风湿关节炎患者身上,随着进一步研究发现,肥胖也是一种初级炎症状态,类风湿关节炎、脂肪、炎症三者之间的关系引起了人们的重视。因此,从与炎症相关的脂肪因子——抵抗素入手,作为构建肥胖与类风湿关节炎疾病关系的桥梁,分析其在类风湿关节炎中的作用。     

2型糖尿病患者血清抵抗素水平与血糖及炎症因子的相关性研究

目的 分析2型糖尿病(DM)患者血清抵抗素与血糖及炎症因子水平的关系.方法 选取本院住院部和门诊于2014年8月至2015年8月收治的患有2型DM的患者作为研究对象,将其分为4组,分别为未采用任何降糖措施的初诊2型DM患者为A组(n=32);血糖已得到控制的2型DM患者为B组(n=28),呼吸道感染的患者为C组(n=24)及健康受试者为D组(n=25),采用酶联免疫分析法对其空腹时血清抵抗素、肿瘤坏死因子-α(TNF-α)和白细胞介素-6(IL-6)水平进行测定,并监测空腹时的胰岛素、血糖和体重指数(BMI)及其C反应蛋白(CRP)水平.结果 A组患者的胰岛素、血清抵抗素、各种炎症因子及血糖含量均明显高于D组(P＜0.01),而B组患者的抵抗素和IL-6含量与D组受试者不具有显著性差异;C组患者的血清抵抗素和各种炎症因子水平均明显高于其余各组(P＜0.05).经相关分析,抵抗素水平与患者性别、BMI及胰岛素水平等均不相关,但与空腹血糖及炎症因子IL-6、TNF-α和CRP均呈显著的正相关性,而与TC呈显著的负相关性.结论 2型DM患者空腹时的血清抵抗素水平明显升高,且与其血糖水平相关,并可受炎症因子的影响,但与肥胖的相关性不显著.     

肥胖人群网膜脂肪中抵抗素mRNA的表达及相关因素的研究

目的了解肥胖人群网膜脂肪中抵抗素mRNA的表达以及相关因素。方法43例患者分为肥胖组和正常对照组,用逆转录-聚合酶链反应（RT-PCR）法检测大网膜脂肪组织抵抗素表达情况;测定血清胰岛素、血糖、血脂、肿瘤坏死因子-α（TNF-α）、游离脂肪酸（FFA）、抵抗素。结果肥胖组网膜脂肪抵抗素mRNA表达以及血清抵抗素水平均显著高于正常对照组。相关分析显示,网膜脂肪抵抗素mRNA表达与血清TNF-α、FFA、抵抗素、体重指数（BMI）、腰臀比（WHR）、胰岛素抵抗指数（HOMA-IR）呈显著正相关;逐步回归分析示对抵抗素表达有显著影响的因素为WHR、BMI。结论肥胖患者的网膜脂肪组织中抵抗素表达以及血清抵抗素均明显增高,两者之间存在明显相关性。肥胖可能是网膜脂肪组织抵抗素表达水平的独立影响因素。     

Relations of Serum Visfatin and Resistin Levels with Endometrial Cancer and Factors Associated with its Prognosis

Background: The aims of this study were compare the serum visfatin and resistin levels between endometrialcancer (EC) patients and controls and evaluate their power to predict prognosis. Materials and Methods: Thisprospective study was conducted between March 2013 to June 2014 on the Gynecologic Oncology Departmentof the University of Selcuk, Konya, Turkey. A total of 42 EC patients and 42 controls were included and assessedfor differences in serum visfatin and resistin levels, along with prognostic factors. Results: Endometrial cancerpatients had significantly higher visfatin levels than control s (p: 0.011), associated with deep myometrial invasion(p: 0.019). In contrast the serum level of resistin did not significantly differ between EC patients and controls (p:0.362). However, high resistin level in EC patients was associated with increase lymph node metastasis (p: 0.009).On logistic regression analysis, we found that serum visfatin elevation was associated with risk of myometrialinvasion (OR: 1,091; 95%CI: 1.021- 1.166; p: 0.010) and serum resistin with risk of lymph node metastasis(OR: 1.018; 95%CI: 1.000- 1.035; p: 0.046). For myometrial invasion prediction, a serum visfatin level greaterthan 26.8 ng/mL demonstrated a sensitivity and specificity of 66.6 % and 96.4%, respectively. For lymph nodemetastasis prediction, the best cut-off for serum resistin level was 599ng/mL. A serum resistin level greater thanthis demonstrated a sensitivity and specificity of 87.5% and 77.1%, respectively. Conclusions: Our data suggestthat serum visfatin is elevated in patients with EC and serum visfatin and resistin levels could be used to predictthe risk of advance stage lesions.     

Circulating Levels of Adipocytokines as Potential Biomarkers for Early Detection of Colorectal Carcinoma in Egyptian Patients

Background: Early detection of various kinds of cancers nowadays is needed including colorectal cancerdue to the highly significant effects in improving cancer treatment. The aim of this study was to evaluate thepotential value of adiponectin, visfatin and resistin as early biomarkers for colorectal cancer patients. Materialsand Methods: Serum levels of adiponectin, visfatin and resistin were measured by a sandwich-enzyme-linked(ELISA) assay technique in 114 serum samples comprising 34 patients with colorectal cancer (CRC), 27 withcolonic polyps (CP), 24 with inflammatory bowel disease (IBD) and 29 healthy controls .The diagnostic accuracyof each serum marker was evaluated using receiver-operating characteristic (ROC) curve analysis. Results:The mean concentration of adiponectin was significantly higher in CRC and CP groups than IBD and controlgroups (P-value <0.05). Also the mean concentration of serum resistin was significantly elevated in the IBD andcontrol groups compared to CRC and CP groups (P-value = 0.014). However, no significant difference was notedin patients of the CRC and CP groups. On the other hand, the mean concentration of visfatin was significantlyelevated in CRC and control groups compared to CP and IBD groups (P-value = 0.03). ROC analysis curves forthe studied markers revealed that between CRC and IBD groups serum level of adiponectin had a sensitivity of76.7% and a specificity of 76% at a cut off value of 3940, +LR being 3.2 and –LR 0.31 with AUC 0.852, while serumlevel of adiponectin between CP and IBD had a sensitivity of 77.8% and a specificity of 75% at a cut off value of3300, with +LR=3.11 and -LR = 0.3 with AUC 0.852. On the other hand the serum level of visfatin between CRCand CP groups had a sensitivity of 65.5% and a specificity of 66.7 at a cut off value of 2.4, +LR being 1.67 and-LR 0.52 with AUC 0.698. Also the serum level of resistin had a sensitivity of 62.5% and a specificity of 70.3%at a cut off value of 24500, with +LR=2.1 and -LR = 0.53 with AUC 0.685 between control and other groups.On the other hand by comparing control vs CP groups resistin had a sensitivity of 81.8% and a specificity of70.8% at a cut off value of 17700, with +LR=2.8 and -LR = 0.26 with AUC 0.763 while visfatin had a sensitivityof 68.2% and a specificity of 70.8% at a cut off value of 2.7, with +LR=2.34 and -LR = 0.0.45 with AUC 0.812.Conclusions: These findings support potential roles of adiponectin, visfatin and resistin in early detection ofCRC and discrimination of different groups of CRC, CP or IBD patients from normal healthy individuals.     

肥胖人群脂联素、抵抗素和胰岛素抵抗水平的研究

目的 探讨肥胖患者血清脂联素、抵抗素和胰岛素抵抗水平的变化及意义.方法 分别测定106例肥胖者和107名健康对照者的体重指数(BMI)、腰围、臀围、空腹胰岛素、空腹血糖、血脂、脂联素和抵抗素水平,计算胰岛素抵抗指数(HOMA-IRI). 结果 肥胖者的体重指数(BMI)、体脂分布百分比(BF)、HOMA-IRI、抵抗素...     

肉桂油对胰岛素抵抗小鼠糖脂代谢的影响

目的:研究肉桂油对胰岛素抵抗小鼠糖脂代谢的影响,探讨其作用机制.方法:采用高脂饲料喂养建立小鼠胰岛素抵抗模型,经肉桂油治疗后测定口服糖耐量及胰岛素耐受,观察体质量、血糖、血清胰岛素、甘油三酯、总胆固醇、瘦素、抵抗素、脂联素的变化.结果:肉桂油能降低胰岛素抵抗小鼠的体质量(30.3±3.6vs34.6±3.1,P<0.05)、血糖(7.6±2.2vs9.2±1.3,P<0.05)、血清胰岛素(1.3±0.1vs1.7±0.2,P<0.05)、甘油三酯(70.1±10.9vs65.4±19.5,P<0.05)、总胆固醇(93.2±13.8vs102.3±21.5,P<0.05)、瘦素、抵抗素水平,同时改善口服糖耐量,降低胰岛素抵抗.结论:肉桂油能有效改善胰岛素抵抗小鼠糖脂代谢,其作用与降低血清瘦素、抵抗素水平,增加胰岛素敏感性有关.     

颅脑外伤合并SIRS患者血清抵抗素与C-反应蛋白的动态变化

目的通过监测颅脑外伤合并全身炎症反应综合征(SIRS)患者血清抵抗素与C-反应蛋白(CRP)的动态变化,探讨其在观察颅脑外伤患者病情变化中的价值。方法 78例颅脑外伤患者分为两组,SIRS组(颅脑外伤合并SIRS)37例和非SIRS组(颅脑外伤不合并SIRS)41例,分别于伤后24h内、第3天、第5天、第7天上午8时抽取静脉血,分离血清后抵抗素采用酶联免疫吸附双抗体夹心方法测定,CRP采用免疫速率散射比浊法检测二者水平。结果两组颅脑损伤患者伤后24h血清抵抗素、CRP含量均显著高于对照组(P均0.01)。非SIRS组患者血清抵抗素、CRP水平在第3天开始下降。SIRS组患者血清抵抗素和CRP水平虽经治疗仍持续上升,两组上述指标同时间比较,差异有统计学意义(P0.01或P0.05),两组患者血清抵抗素与CRP呈正相关(r=0.689,P0.01)。结论抵抗素和CRP水平可以用于评估颅脑外伤是否合并SIRS,对于监测SIRS的发生具有较好的临床意义,并有助于准确及时地评估病情和判断预后。