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1.
瘦素及脂联素与非酒精性脂肪性肝病 总被引:1,自引:0,他引:1
非酒精性脂肪性肝病(NAFLD)作为代谢综合征在肝脏的表现,是一个多因素共同作用的结果,近年来已成为临床高发疾病之一。除了胰岛素抵抗(IR)在本病发生发展过程中起着重要作用外,脂联素(APN)、瘦素(LP)水平变化与胰岛素抵抗以及与NAFLD的关系受到关注。本文就脂联素(APN)、瘦素(LP)在NAFLD发病中的作用予以综述。 相似文献
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目的 探讨非酒精性脂肪性肝病(NAFLD)大鼠肝脏脂联素受体(AdipoR)mRNA的表达.方法 喂养高脂饲料建立NAFLD大鼠模型,分别于2、4、8、12周检测血清生化指标,并取肝组织测肝指数(肝湿重/体重),以RT-PCR法检测肝脏AdipoR1和AdipoR2 mRNA的表达,肝组织冰冻切片苏丹Ⅲ脂肪染色、石蜡切片苏木素-伊红常规染色和Masson三色纤维染色,镜下观察.结果 模型组大鼠2、4、8、12周肝脏AdipoR1 mRNA表达逐步上升,AdipoR2 mRNA表达逐步下降,两者分别于4周、2周开始显著差异于对照组(P均<0.01).模型组肝脏AdipoR2表达与肝指数(r=-0.431,P=0.006)、纤维化评分(r=-0.353,P=0.025)均呈显著负相关.结论 NAFLD大鼠肝脏AdipoR1 mRNA表达增加,AdipoR2 mRNA表达减少,提示肝脏AdipoR表达异常可能参与NAFLD的发病机制. 相似文献
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脂联素与非酒精性脂肪肝病 总被引:3,自引:1,他引:3
脂联素(adiponectin,ADP)作为一种新发现的脂肪激素,主要是由脂肪细胞分泌的,在肥胖者、糖尿病及非酒精性脂肪性肝病(nonalcoholic fatty liver disease,NAFLD)患者中血清ADP水平低于正常.ADP有胰岛素增敏作用,与胰岛素抵抗相关;能够使肝脏肿瘤坏死因子(tumor necrosis factor-alpha,TNF-α)分泌下降,减少肝中脂肪堆积和炎症介质作用,对ADP的研究将为探讨NAFLD的发病机制及治疗方案提供新的线索. 相似文献
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目的 观察血脂康对高脂血症大鼠的疗效,通过治疗前后脂联素、瘦素变化,探讨其保护内皮、抗动脉粥样硬化的机制.方法 实验用清洁级SD大鼠36只,随机分为3组,每组12只.正常对照组饲喂普通饲料,余各组饲喂高脂饲料.高脂血症大鼠造模成功后随机分为2组,每组12只.正常对照组灌胃纯净水2 mL,1次/日;实验对照组灌胃纯净水2 mL,1次/日;血脂康组灌胃血脂康1 000 mg/(kg·d),1次/日.观察6周后血脂、脂联素、瘦素水平的变化,并作病理切片观察动脉粥样硬化情况.结果 治疗6周后,血脂康组总胆固醇、低密度脂蛋白胆固醇、脂联素、瘦素与灌胃前比较有统计学意义(P<0.05),实验对照组灌胃前后差异无统计学意义(P>0.05).血脂康组动脉标本病理切片显示其病变情况较实验对照组明显减轻.结论 血脂康具有明确的调脂、抗动脉粥样硬化作用. 相似文献
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非酒精性脂肪肝胰岛素抵抗及血清瘦素和脂联素水平的研究 总被引:1,自引:0,他引:1
[目的]研究非酒精性脂肪肝(NAFLD)患者胰岛素抵抗指数(IRI)、瘦素和脂联素水平的变化,探讨疾病发病中胰岛素抵抗(IR)、瘦素和脂联素的作用.[方法]测定体检和住院人群中NAFLD并肥胖(NAFLD)组、单纯性肥胖(肥胖)组和正常对照组空腹血糖、空腹血清胰岛素,采用稳态模型法计算IRI,同时检测瘦素和脂联素水平.[结果]NAFLD组空腹胰岛素水平和IRI显著高于肥胖组和对照组(P<0.05);NAFLD组和肥胖组的瘦素水平显著高于对照组(P<0.05);NAFLD组和肥胖组的脂联素水平显著低于对照组(P<0.05);直线相关分析后,IRI与血清瘦素水平呈显著正相关(r=0.169 3,P<0.01);而与血清脂联素水平呈显著负相关(r=-0.218 7,P<0.01).[结论]IR可能是NAFLD发生、发展的基础,IR构成NAFLD患者基本特征之一,中央型肥胖是NAFLD的危险因素;NAFLD患者瘦素水平升高而脂联素水平降低,瘦素和脂联素通过不同机制参与了IR的发生、发展,进而影响NAFLD的发病. 相似文献
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瘦素、脂联素与高血压 总被引:3,自引:0,他引:3
瘦素和脂联素均为脂肪组织分泌的脂肪细胞因子,但是高血压患者的瘦素水平升高,而脂联素水平降低.现就瘦素、脂联素生物学特性及其与高血压关系的研究进展进行综述. 相似文献
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目的 观察大黄蛰虫丸对血脂异常大鼠血清脂联素、瘦素的影响,从中探讨大黄蛰虫丸调节血脂异常的机制.方法 雄性Wistar大鼠50只,体重220~300 g,随机分为5组,对照组、模型组、大黄蛰虫丸组高剂量、低剂量组,阳性药组,每组10只.采用高脂饲料喂养复制动物模型,用大黄蛰虫丸灌胃8 w后,观察各组大鼠血清血脂,脂联素、瘦素含量的变化.结果 模型组脂联素含量显著降低,瘦素含量显著升高,与对照组比较有显著差异(P<0.05),大黄蛰虫丸组较模型组血清脂联素含量明显升高,瘦素含量显著降低(P<0.05).结论 大黄蛰虫丸具有防治血脂异常的作用,其机制可能通过升高血清脂联素含量,降低血清瘦素含量发挥调节血脂作用. 相似文献
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脂联素是脂肪细胞特异分泌的细胞因子,有增强胰岛素敏感性、抗高血糖、抗动脉粥样硬化等效应.它在血清中有3种不同的低聚体形式,改变每种低聚体的相对量可以调节脂联素的活性.脂联素受体1(AdipoR1)在骨骼肌有丰富表达,脂联素受体2(AdipoR2)主要在肝脏表达.AdipoR1对脂联素球形结构域(gACRP30)有高度亲和性,AdipoR2对全长型脂联素及gACRP30有中度亲和性.已有研究表明脂联素通过激活腺苷酸活化蛋白激酶和增强胰岛素受体酪氨酸磷酸化作用等途径发挥作用.白介素-6、过氧化物酶体增殖物激活受体-γ影响脂联素的表达和分泌. 相似文献
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目的 探讨血管紧张素Ⅱ受体拮抗剂(ARB)厄贝沙坦对自发性高血压大鼠(SHR)瘦素、脂联素的影响及可能机制.方法 24只雄性SHR大鼠随机分为SHR模型组(SHR-C)、SHR氢氯噻嗪组(SHR-H)和SHR厄贝沙坦组(SHR-I),每组8只;另设同源雄性Wistar Kyoto(WKY)大鼠8只为对照组.SHR-I组应用厄贝沙坦30 mg·kg-1·d-1灌胃,SHR-H组应用氢氯噻嚷10 mg·kg-1·d-1灌胃,SHR-C和WKY组均配以等量蒸馏水灌胃,连续8周后,测尾动脉收缩压(SBP);颈动脉取血,检测血清血糖、胰岛素、瘦素和脂联素浓度;取大鼠附睾脂肪组织,通过反转录和聚合酶链反应(RT-PCR),分析附睾脂肪瘦素mRNA和脂联素mRNA表达水平.结果 与WKY组比较,SHR-C组大鼠收缩压显著升高(P<0.01);与SHR-C组比较,SHR-I组和SHR-H组大鼠收缩压显著降低(P<0.01).与WKY组比较,SHR-C组大鼠胰岛素抵抗指数(HOMA-IR)显著升高(P<0.01);与SHR-H组和SHR-C组比较,SHR-I组大鼠HOMA-IR明显降低(P<0.05).与WKY组比较,SHR-C组大鼠血清瘦素浓度和脂肪瘦素mRNA表达水平显著增高(P<0.01);与SHR-C组比较,SHR-I组大鼠血清瘦素浓度显著降低(P<0.01),脂肪瘦素mRNA表达水平明显降低(P<0.05).与WKY组比较,SHR-C组大鼠血清脂联素浓度和脂肪脂联素mRNA表达水平显著降低(P<0.01);与SHR-C组比较,SHR-I组大鼠血清脂联索浓度和脂肪脂联索mRNA表达水平显著升高(P<0.01).结论 厄贝沙坦能改善自发性高血压大鼠胰岛索的敏感性,减少其脂肪组织瘦素的合成和分泌,增加脂联素的合成和分泌. 相似文献
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目的了解体外胰岛素对原代培养大鼠骨骼肌细胞脂联素受体1表达的影响。方法体外原代培养骨骼肌细胞,应用SYBRGreenⅠ染料建立一种快速、可靠的实时定量PCR,对其主要要素进行优化。观察不同胰岛素浓度不同作用时间下,大鼠骨骼肌细胞脂联素受体基因表达水平的动态变化。结果建立敏感、特异、快速检测脂联素受体1mRNA的实时定量PCR方法,随着胰岛素浓度的增加,脂联素受体1表达逐渐降低。在较低浓度(胰岛素浓度〈1nmol/L)时,脂联素受体1表达的降低无统计学意义,当胰岛素浓度增加到10nmol/L及以上时,骨骼肌细胞脂联素受体1表达的降低有统计学意义(P〈0.05),这种抑制作用1h后出现,24h后达到高峰。结论成功地建立SYBRGreenⅠ实时定量PCR检测脂联素受体基因的表达方法,体外高胰岛素对骨骼肌细胞脂联素受体1mRNA表达有抑制作用,并呈时间和剂量依赖性。 相似文献
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目的 研究非酒精性脂肪性肝病(NAFLD)患者血清脂联素/瘦素(A/L)与胰岛素抵抗(IR)的关系,探讨血清A/L在NAFLD严重程度分级中的意义.方法 将78例确诊NAFLD患者,依据彩色超声诊断仪显像结果,分为轻度NAFLD组31例,平均年龄为(50±14)岁,男女比例为19∶12;中重度NAFLD组47例,平均年龄为(49±14)岁,男女比例为27∶20.同期观察体检健康志愿者30例作为对照组,平均年龄(48±10)岁,男女比例为18∶12.ELISA法测定血清瘦素(LP)、脂联素(APN)水平,并检测体质量指数(BMI)、谷丙转氨酶(ALT)、谷草转氨酶(AST)、三酰甘油(TG)、总胆固醇(CHO)、高密度脂蛋白胆固醇(HDL)、低密度脂蛋白胆固醇(LDL)、空腹血糖/胰岛素、稳态模型评估的胰岛素抵抗指数(HOMA-IR).采用SPSS17.0软件包进行统计学分析,计量资料差异性比较用方差分析,多因素相关性用Pearson分析.结果 血清LP与HOMA-IR、LDL和BMI均呈正相关(r=0.296,P=0.000;r=0.327,P=0.000;r=0.282,P=0.001),血清APN与HOMA-IR、LDL和BMI均呈负相关(r=-0.375,P=0.000;r=-0.368,P=0.000;r=-0.285,P=0.001).A/L与HOMA-IR、LDL和BMI均呈显著负相关(r=-0.398,P=0.000;r =-0.374,P =0.000;r=-0.307,P=0.000),且NAFLD轻度组的相关系数(r=-0.311)大于中重度组(r=-0.486).结论本研究对NAFLD患者检测发现,A/L与HOMA-IR呈显著负相关.初步提示血清A/L比值可作为一种非侵入性检测指标,有助于NAFLD严重程度的临床分级. 相似文献
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[目的]探讨活血燥湿汤对非酒精性脂肪肝大鼠的作用机制.[方法]以高脂肪、高胆固醇饲料喂养制作大鼠非酒精性脂肪肝模型.将30只SD大鼠随机分为对照组、模型组与中药干预组,每组10只,分别喂养16周后,测量动物的体重、肝重,常规苏木精-伊红染色观察肝组织病理变化,观察并比较对照组、模型组、干预组对肝组织羟脯氨酸(Hyp)、血清脂联素(APN)水平的影响.[结果]①病理学观察显示:模型组造模均成功,据肝细胞脂肪变性占所获肝组织标本量的范围分为4度(F0~F4),模型组炎症活动度积分(2.58±0.26),与对照组比较,差异有统计学意义(P<0.01);干预组炎症活动度积分(1.42±0.11),与模型组比较,差异有统计学意义(P<0.05).②模型组ALT、AST、TC、TG、Hyp含量均比对照组显著增高,模型组在ALT、AST、TC、Hyp含量上与干预组比较,差异有统计学意义;干预组ALT、AST、TC含量均比对照组增高,TG、Hyp含量与对照组比较,差异无统计学意义.③与对照组比较,模型组血清脂联素显著降低;干预组与模型组比较,血清脂联素差异有统计学意义;模型组及干预组肝组织脂联素含量与对照组比较均增高,差异有统计学意义.相关分析显示,血清脂联素水平与肝组织羟脯氨酸呈负相关.[结论]活血燥湿汤可能通过提高血清脂联素的含量、抑制肝组织羟脯氨酸的表达对非酒精性脂肪肝大鼠产生保护作用. 相似文献
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Huang XD Fan Y Zhang H Wang P Yuan JP Li MJ Zhan XY 《World journal of gastroenterology : WJG》2008,14(18):2888-2893
AIM: To determine the role of leptin system in non-alcoholic fatty liver disease (NAFLD) development by delineating the changes in serum levels of leptin and soluble leptin receptor (sOB-R).
METHODS: Blood samples were collected from 30 consecutive patients with liver-biopsy-proven NAFLD and 30 patients with cholecystolithiasis (stationary phase) as controls. Serum leptin levels were determined by radioimmunoassay and concentration of sOB-R was measured by ELISA. Body mass index (BMI) was calculated for all subjects, and serum insulin, C-peptide, and lipoprotein levels were also detected.
RESULTS: Mean serum leptin level and BMI in the NAFLD group were significantly higher than in the controls (both P 〈 0.001), but mean sOB-R level was lower in the NAFLD group when compared to the controls. Both men and women in the NAFLD group had higher mean serum leptin levels and lower sOB-R levels than did the men and women in the control group (all P 〈 0.001). There was a significant negative correlation between serum leptin and sOB-R levels (r = -0.725, P 〈 0.001). Multivariate analysis showed that the percentage of hepatocyte steatosis, sex, BMI, and homeostasis model assessment of insulin resistance (HOMA IR) were independently related to serum leptin levels.
CONCLUSION: Elevated serum leptin seems to be afeature of steatosis, and serum leptin seems to increase as hepatocyte steatosis develops. An enhanced release of leptin is accompanied by an decrease in sOB-R concentration, which suggests higher resistance of peripheral tissues towards the action of leptin. 相似文献
METHODS: Blood samples were collected from 30 consecutive patients with liver-biopsy-proven NAFLD and 30 patients with cholecystolithiasis (stationary phase) as controls. Serum leptin levels were determined by radioimmunoassay and concentration of sOB-R was measured by ELISA. Body mass index (BMI) was calculated for all subjects, and serum insulin, C-peptide, and lipoprotein levels were also detected.
RESULTS: Mean serum leptin level and BMI in the NAFLD group were significantly higher than in the controls (both P 〈 0.001), but mean sOB-R level was lower in the NAFLD group when compared to the controls. Both men and women in the NAFLD group had higher mean serum leptin levels and lower sOB-R levels than did the men and women in the control group (all P 〈 0.001). There was a significant negative correlation between serum leptin and sOB-R levels (r = -0.725, P 〈 0.001). Multivariate analysis showed that the percentage of hepatocyte steatosis, sex, BMI, and homeostasis model assessment of insulin resistance (HOMA IR) were independently related to serum leptin levels.
CONCLUSION: Elevated serum leptin seems to be afeature of steatosis, and serum leptin seems to increase as hepatocyte steatosis develops. An enhanced release of leptin is accompanied by an decrease in sOB-R concentration, which suggests higher resistance of peripheral tissues towards the action of leptin. 相似文献
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目的:探讨非酒精性脂肪性肝病(NAFLD)患者中医证型与胰岛素抵抗指数(HOMA—IR)、脂联素/瘦素比值(APN/LEP)的相关性。方法:对186例NAFLD患者辨证分为肝郁湿阻型、湿热蕴结型、痰瘀互结型和脾肾阳虚型,均进行空腹血糖(FPG)、胰岛素(FINS)、瘦素(LEP)和脂联素(APN)检测,比较HOMA—IR和APN/LEP在各组之间的差异。结果:痰瘀互结型和脾肾阳虚型患者HOMA-IR显著高于肝郁湿阻和湿热蕴结型(P〈0.05);湿热蕴结和痰瘀互结型患者APN/LEP显著低于肝郁湿阻和脾肾阳虚型(P〈0.05)。结论:综合HOMA—IR和APN/LEP对于判定NAFLD的中医证型有一定的应用价值。 相似文献
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研究瘦素抵抗和男性非酒精性脂肪肝(nonalcoholic fatty liver,NAFL)的关系。我们用放射免疫法检测52例NAFL患者和45例正常对照者血清中的瘦素水平,分析血清瘦素与男性NAFL患者以及与HOMA-IR(以HOMA模型计算胰岛素抵抗指数)、总胆固醇(TC)、甘油三酯(TG)、高密度脂蛋白胆固醇(HDL-C)和低密度脂蛋白胆固醇(LDL-C)等指标的关系。NAFL患者血清中的瘦素水平(6.75±1.32μg/ml)显著高于正常对照组(3.21±0.95μg/ml),P<0.01,且肥胖的NAFL患者血清中的瘦素水平(7.95±0.85ng/ml)显著高于非肥胖NAFL患者的瘦素水平(6.11±1.21μg/ml),P<0.01。NAFL患者血清中的FINS、HOMA-IR和TG水平均高于正常对照组,且NAFL患者血清瘦素水平与HOMA-IR呈负相关(r=0.521,P<0.05),与BMI呈正相关(r=0.718,P<0.00),与TG呈正相关(r=0.425,P<0.01)。男性NAFL患者存在着明显的瘦素抵抗,提示瘦素抵抗在NAFL的发病机制中具有十分重要的作用。 相似文献
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目的 探讨瘦素受体基因多态性与非酒精性脂肪肝患者临床表型间的关系.方法 以非酒精性脂肪肝患者和正常对照人群为研究对象,应用聚合酶链反应及限制性片段长度多态性方法(PCR-RFLP),对167例中国人(包括85例非酒精性脂肪肝患者和82例正常对照)的瘦素受体基因Gln223Arg进行研究,同时进行临床参数的检测.结果 (1)非酒精性脂肪肝患者和正常对照组人群中Gln223Arg基因型频率和等位基因频率差异无显著性(P>0.05).(2)非酒精性脂肪肝男性患者中AA AG基因型者TC、BMI高于GG基因型(P<0.05).(3)进一步用Logistic回归分析发现:在非酒精性脂肪肝男性患者中该基因变异与TC相关(P=0.019).结论 非酒精性脂肪肝男性患者瘦素受体基因Gln223Arg多态性与TC水平相关.瘦素受体基因Gln223Arg可能参与非酒精性脂肪肝的脂质代谢. 相似文献
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Yuan Ma Kewei Sun Jianzhong Cao Xiaowu Qin Jiaoling Shi Huiying Li Jun Zhang Tao Zhang 《Medicine》2021,100(51)
Background:Non-alcoholic fatty liver disease (NAFLD) is a global health burden. However, there are no approved drugs for NAFLD. A number of studies have shown that acupuncture combined with Chinese herbal medicine (CHM) can be beneficial for NAFLD. However, high-quality trials are still lacking. Therefore, we aimed to conduct a systematic review and meta-analysis to assess the effectiveness and safety of acupuncture combined with CHM for NAFLD.Methods:Eight electronic databases including PubMed, the Cochrane Library, Web of Science, EMBASE, China National Knowledge Infrastructure, Chinese Scientific and Technical Journals Database, and Wan-fang Database from inception to November 2021 will be searched. We will also search for Clinical Trials Registry Platforms as a supplement. Randomized controlled trials on acupuncture combined with CHM for NAFLD will be included. Literature screening, data extraction, and risk of bias assessment were independently conducted by 2 reviewers. All differences between the 2 reviewers will be discussed and resolved by a third reviewer. Revman5.3 software will be used for meta-analysis.Result:This study aimed to evaluate the effectiveness and safety of acupuncture combined with CHM for NAFLD.Conclusion:The findings of this study will provide more evidence to determine whether acupuncture combined with CHM for NAFLD is an effective and safe intervention for NAFLD. 相似文献