Oxidative stress-related parameters in the liver of non-alcoholic fatty liver disease patients

Oxidative stress is implicated in the pathogenesis of non-alcoholic fatty liver disease (NAFLD). In the present study, hepatic and plasma oxidative stress-related parameters were measured and correlated with clinical and histological findings in 31 NAFLD patients showing increased body mass index. Liver protein carbonyl content was enhanced by 403% in patients with steatosis (n=15) compared with control values (n=12), whereas glutathione content, superoxide dismutase (SOD) activity and the ferric reducing ability of plasma (FRAP) were decreased by 57%, 48% and 21% (P<0.05) respectively. No changes in microsomal p-nitrophenol hydroxylation and the total content of cytochrome P450 (CYP) or CYP2E1 were observed. Patients with steatohepatitis (n=16) exhibited protein carbonyl content comparable with that of controls, whereas glutathione content, SOD and catalase activities were decreased by 27%, 64% and 48% (P<0.05). In addition, FRAP values in patients with steatohepatitis were reduced by 33% and 15% (P<0.05) when compared with controls and patients with steatosis respectively, whereas p-nitrophenol hydroxylation (52%) and CYP2E1 content (142%) were significantly increased (P<0.05) compared with controls. It is concluded that oxidative stress is developed in the liver of NAFLD patients with steatosis and is exacerbated further in patients with steatohepatitis, which is associated with CYP2E1 induction. Substantial protein oxidation is followed by proteolysis of the modified proteins, which may explain the co-existence of a diminished antioxidant capacity and protein oxidation in the liver of patients with steatohepatitis.     

血清铁含量检测在酒精性脂肪性肝病和非酒精性脂肪性肝病中的临床意义

目的：探讨铁代谢相关血清学指标在酒精性脂肪性肝病(ALD)和非酒精性脂肪性肝病(NAFLD)中的意义及在肝损伤过程中的作用。方法脂肪性肝病患者406例,其中 ALD 组198例,NAFLD 组208例,另选健康对照组96例,检测血清铁(SF)、铁蛋白(Ferr)及转铁蛋白(TRF)。结果 NAFLD 组、ALD 组 SF、Ferr 水平均高于健康对照组(P <0.05);且 NAFLD 组 SF、Ferr 水平高于 ALD 组。NAFLD 组、ALD 组 TRF 水平均低于健康对照组(P <0.05);且 NAFLD 组 Ferr 水平低于 ALD 组。NAFLD、ALD 组肝硬化亚组血清 SF、Ferr 明显高于肝炎亚组(P <0.05),TRF 明显低于肝炎亚组,差异均有统计学意义(P <0.05)。结论 SF、Ferr 和 TRF 有助于了解脂肪性肝病患者肝损伤程度,特别是对 NAFLD 的预后有重要意义。     

Red blood cell status in alcoholic and non-alcoholic liver disease.

Macrocytosis is most commonly associated with vitamin B(12) and folic acid deficiency, followed by alcoholism, liver disease, and other pathologic conditions. We studied the red cell and vitamin status in 423 consecutive patients with various liver diseases, including 31 with acute viral hepatitis (AVH), 105 with chronic hepatitis (CH), and 134 with alcoholic liver disease (ALD), who consisted of 84 with non-cirrhotic alcoholic liver disease (NCALD) and 50 with alcoholic liver cirrhosis (ALC), 60 with non-alcoholic liver cirrhosis (NALC), and 93 with hepatocellular carcinoma (HCC). The mean corpuscular volume (MCV) and red cell distribution width (RDW) were significantly higher in patients with ALD and NALC, and among them macrocytosis occurred more frequently in patients with ALC. Macrocytic anemia was mostly found in cirrhotic patients, in which the Child-Pugh score was closely related to the development of macrocytic anemia. In ALD, the MCV was significantly correlated with the estimated alcohol consumption and inversely correlated with the serum folic acid level, which, however, was often maintained within the normal range in patients with macrocytic ALC. After abstinence from alcohol, the MCV and RDW were reduced significantly and were associated with an increasing serum folic acid level. This suggests that macrocytic anemia was a common feature of alcoholic and non-alcoholic liver cirrhosis and that alcohol abuse and folic acid deficiency play a secondary role in macrocytosis.     

黏弹性参数诊断非酒精性脂肪性肝病研究进展

正非酒精性脂肪性肝病(nonalcoholic fatty liver disease,NAFLD)是目前较为常见的慢性肝病,影响全球25%的人口~([1]),并且发病率随着肥胖相关疾病的流行而增加~([2])。NAFLD包括多种临床和组织病理学改变,包括单纯性脂肪变性、脂肪性肝炎、肝硬化和肝细胞癌~([3])。不同脂肪变性     

非酒精性脂肪性肝病的无创伤性诊断

非酒精性脂肪性肝病(nonalcoholic fatty liver disease,NAFLD)是与胰岛素抵抗(insulin resistance,IR)及遗传易感性密切相关的代谢应激性肝损伤,其疾病谱包括单纯性脂肪肝、非酒精性脂肪性肝炎     

非酒精性脂肪肝合并高血压患者血清脂联素水平的研究

目的 研究非酒精性脂肪肝(NAFLD)合并高血压患者血清脂联素水平与胰岛素抵抗(HO-MA)程度的相关性.方法 性别匹配的NAFLD合并高血压患者65例,单纯NAFLD患者51例,健康体检者54例作为对照组.测定体质指数(BMI),检测空腹血糖(FBS)、丙氨酸氨基转移酶(ALT)、胆固醇、甘油三酯(TG)等生化指标并行肝脏B超检查.放射免疫法测定空腹胰岛素(FINS)水平,计算胰岛素抵抗指数(HO-MA-IR).同时酶联免疫法测定血清脂联素水平.并用相关及多元回归分析血清脂联素水平与各参数的相关性.结果 NAFLD患者BMI[(27.12±2.63)kg/m2]、ALT[(35.86±20.16)U/L]、TG[(2.73±1.43)mmol/L]、FBS[(5.71±0.65)mmol/L]、FINS[(12.33±4.16)mIU/L]、HOMA-m(3.11±1.04)]水平较对照组高[(23.14±2.86)kg/m2、(19.72±8.90)U/L、(1.35±0.59)mmol/L、(5.19±0.78)mmol/L、(2.31±1.61)mIU/L、0.53±0.39]P＜0.05),脂联素水平较对照组低([(4.52±2.05)、(8.88±3.37)μg/ml]P＜0.05);NAFLD 合并高血压患者HOMA-IR较单纯NAFLD患者更高(4.47±2.87、3.11±1.04,P＜0.05),脂联素水平更低((3.19±1.52)、(4.52±2.05)μg/ml,P＜0.05).结论 NAFLD合并高血压患者HOMA-IR、FINS较NAFLD更为严重,脂联素水平更低.脂联素与BMI、ALT、FBS、FINS、TG、HOMA呈负相关,与性别相关,与年龄、胆固醇相关不明显.脂联素与TG以及HOMA相关.     

胰岛素抵抗与非酒精性脂肪性肝病和动脉粥样硬化

代谢综合征（MS）具有多种动脉粥样硬化（AS）和非酒精性脂肪性肝病（NAFLD）的危险因素,而胰岛素抵抗（IR）是MS重要的病理生理基础。NAFLD和AS为一多因素性疾病,IR、炎症、血脂异常和许多脂肪细胞因子作为危险因子促进AS和NAFLD的发生发展,它们相互作用参与多个病理生理过程。     

Relationship between non-alcoholic fatty liver disease and coronary heart disease

Non-alcoholic fatty liver disease (NAFLD) is the leading cause of chronic liver disease and considered a liver manifestation of metabolic syndrome. It is in close relationship with insulin resistance, obesity, diabetes mellitus, all of which increase risk of cardiovascular disease (CVD). Besides, many studies point out that NAFLD independently contributes to the development of atherosclerosis and CHD. On the other hand, CVDs are the leading cause of death in NAFLD patients. Many pathophysiological changes and molecular mechanisms play an important role in NAFLD for CVD formation. Atherosclerosis is common in NAFLD, which also mainly contributes to the CVD formation and CHD. Many studies linking atherosclerotic CHD and NAFLD are present in the literature. Subclinical CHD, mainly detected by coronary computed tomography views, have been detected more common in NAFLD patients. Presence of NAFLD has been found to be more common in patients with severe CHD and in stable CHD, NAFLD has been found to be associated with more diffuse disease. In acute coronary syndromes, especially in acute myocardial infarction, patients with NAFLD have been found to have poor prognosis when compared with NAFLD free patients. In this review, our aim is to evaluate the relationship between NAFLD and CHD in detail and go over the pathophysiological mechanisms underlying this relationship.     

血脂测定在非酒精性肝脂肪变性诊断中的应用

目的探讨血清脂质测定在非酒精性肝脏脂肪变性（NAFLD）诊断中的应用价值。方法测定169例NAFLD患者和123名健康者对照血清脂质、载脂蛋白水平,用受试者工作特征（ROC）曲线分析各参数的诊断价值。结果NAFLD患者的三酰甘油（TG）、载脂蛋白C3（apo C3）、载脂蛋白E（apo E）、apo C3／apo E、非高密度脂蛋白胆固醇（non-HDL-C）及胆碱酯酶（ChE）明显高于对照组（P〈0．05）,高密度脂蛋白胆固醇（HDL-C）、载脂蛋白A-I（apoA-I）明显低于对照组（P〈0．05）,ChE、apo C3、apo C3／apo E及apo C3／apo E＋ChE＋HDL-C ROC曲线下的面积分别为0．603、0．654、0．743和0．760。结论apo C3／apo E比值及其与ChE和HDL-C联合检测可提高对NAFLD的诊断效率。     

双源CT评价非酒精性脂肪肝与冠心病关系的研究

目的评估非酒精性脂肪肝和冠心病之间的关系。方法回顾性分析1 115例行双源CT(DSCT)冠状动脉造影和接受DSCT肝脏平扫的临床资料,根据有无脂肪肝分为脂肪肝组和非脂肪肝组。分析两组间冠脉CTA的结果差异。结果脂肪肝组和非脂肪肝组患者在冠状动脉单支、双支及多支病变发病率间均有显著差异(P<0.05),两组间在冠脉轻、中、重度狭窄方面也存在显著差异(P<0.05),脂肪肝组中度以上钙化发生率明显增加(P<0.05)。结论非酒精性脂肪肝与冠心病发病有关。     

胰岛素抵抗与非酒精性脂肪性肝病关系的认识

非酒精性脂肪性肝病(non-alcoholic fatty liver disease,NAFLD)是指除外酒精及其他明确的损肝因素所致的、以弥漫性脂肪变为特征的临床病理综     

Low-dose attenuation correction in diagnosis of non-alcoholic fatty liver disease

Abdominal Radiology - Non-enhanced computed tomography (CT) is a valuable modality in the diagnosis of non-alcoholic fatty liver disease (NAFLD). However, it is not clear if low-dose CT attenuation...     

非酒精性脂肪肝病与胰岛素抵抗的相关性

目的:探讨不同程度非酒精性脂肪肝病(NAFLD)与胰岛素抵抗(IR)的相关性.方法:测定非NAFLD组(A组60例)、轻度NAFLD组(B组60例)、中重度NAFLD组(C组52例)的体质量指数(BMI)、腰围(WC)、血压、三酰甘油(TG)、总胆固醇(TC)、低密度脂蛋白(LDL-C)、高密度脂蛋白(HDL-C)、空腹血糖(FPG)、餐后2h血糖(2hPG)、空腹胰岛素(FIns)等指标,采用稳态模型评估法计算胰岛素抵抗指数(HOMA-IR)并作统计分析.结果:B、C组的BMI、WC、SBP、DBP、TG、LDL-C、FPG、2hPG、HOMA-IR均高于A组(P＜0.05),B、C组HDL-C低于A组(P＜0.01);C组BMI、WC、TG、2hPG、HOMA-IR较B组明显升高(P＜0.01);相关分析显示,NAFLD的病变程度与BMI(r=0.212,P＜ 0.05)、WC(r=0.209,P＜0.05)、TG(r=0.547,P＜ 0.01)、2hPG(r=0.323,P＜ 0.01)、HOMA-IR(r=0.563,P＜ 0.01)呈正相关.多元逐步回归分析显示,BMI、2hPG、TG和有脂肪肝是胰岛素抵抗的主要危险因素.结论:NAFLD与胰岛素抵抗的发生发展密切相关,是胰岛素抵抗发生的独立危险因素之一.     

Portal vein hemodynamics in patients with non-alcoholic fatty liver disease

Paralleling the rise in the incidence of obesity and diabetes worldwide, nonalcoholic fatty liver disease (NAFLD) is being increasingly recognized as one of the major causes of chronic liver disease. Doppler sonography is used as a diagnostic method in the non-invasive assessment of the hemodynamics of hepatic vascular flow in liver diseases. We investigated the effects of fatty infiltration in the liver on the Doppler flow hemodynamics of the portal vein. Doppler sonography of the liver and portal vein was performed in 60 subjects with NAFLD and 20 healthy volunteers (control). The patients were grouped into mild (grade 1), moderate (grade 2), and severe (grade 3) according to sonographic appearance of hepatosteatosis (n = 20 for each group). The vein pulsatility index (VPI), mean flow velocity (MFV), peak maximum velocity (V(max)), and peak minimum velocity (V(min)) of the portal vein were significantly lower in patients with NAFLD than those of the controls (p < 0.001). The VPI was 0.20 in the patients and 0.31 in the control. The MFV was 12.3 cm/sec in the patients and 16.5 cm/sec in the control group. The portal vein flow was found to be decreased as the grade of fatty infiltration increased for VPI (r = -0.946, p < 0.001), MFV (r = -0.951, p < 0.001). The alteration in Doppler waveform pattern of portal vein with fatty liver population suggests reduced vascular compliance in the liver.     

Sex hormone changes in chronic liver disease: a matched study of alcoholic versus non-alcoholic liver disease

Men with liver disease are hypogonadal and feminized. European workers consider the liver disease itself to be the major factor but American workers blame alcohol consumption. We studied sexual dysfunction and sex hormones in three matched groups of men; controls (n = 22), those with alcoholic liver disease (n = 21), and those with non-alcoholic liver disease (n = 21). Men with alcoholic liver disease had more sexual dysfunction. Testosterone and androstenedione concentrations were lower and oestradiol and dehydroepiandrosterone sulphate levels were raised in the liver disease groups. The changes were greatest in the alcoholic liver disease group. In this, the first controlled study, liver disease per se appears to cause sexual dysfunction and sex hormone changes but these changes are amplified by ethanol.     

血清骨桥蛋白与非酒精性脂肪性肝病患者肝纤维化的相关性分析

目的探讨血清骨桥蛋白(OPN)水平在非酒精性脂肪性肝病(NAFLD)肝纤维化诊断中的价值。方法选择手术临床确诊NAFLD患者86例、健康对照者(正常对照组)60名。采用肝组织活检评估肝纤维化分期,酶联免疫吸附试验(ELISA)检测血清OPN水平,并与患者临床生化指标[包括丙氨酸氨基转移酶(AST)、天门冬氨酸氨基转移酶(ALT)、总胆固醇(TC)、高密度脂蛋白胆固醇(HDL-C)、低密度脂蛋白胆固醇(LDL-C)、甘油三酯(TG)与高敏C反应蛋白(hs-CRP)]进行相关分析。结果与正常对照组相比,NAFLD组的体重指数(BMI)、收缩压、舒张压、AST、ALT、稳态胰岛素评价指数(HOMA-IR)、TC、LDL-C及TG均明显增高,且罹患糖尿病、代谢综合征比例较高(P0.01);NAFLD组血清OPN水平较明显高于正常对照组,且与AST、ALT、hs-CRP、肝纤维化分期呈正相关(r值分别为0.224、0.265、0.192、0.219,P值分别为0.001、0.001、0.003、0.001),与性别、HDL-C呈负相关(r值分别为-0.213、-0.191,P值分别为0.01、0.041)。受试者工作特征(ROC)曲线显示当OPN以32μg/L作为临界值时,诊断肝纤维化≥3期NAFLD的曲线下面积(AUC)为0.897,灵敏度和特异性分别为0.821和0.855。结论作为促纤维化因子,OPN不仅可以反映NAFLD的纤维化程度,而且在NAFLD病变形成中也可能起到一定作用。     

新生大鼠低血糖与非酒精性脂肪性肝病的关系研究

目的本研究通过建立新生大鼠低血糖模型,然后再以此为基础,诱发非酒精性脂肪性肝病（NAFLD）,通过比较不同组间病变程度、胰岛素抵抗强弱、肝功能等指标的差异,了解新生大鼠低血糖和NAFLD易感性之间的关系,为了解NAFLD的发生机制和寻找有效的防治措施提供实验依据。方法购SPF级成熟Wistar雌性大鼠20只和雄性大鼠10只,合笼交配,从所生仔鼠中每窝随机抽取0—1只,总共12只作为正常血糖＋正常饮食组;然后将相同母鼠所生3只新生大鼠,随机分入正常血糖＋高脂饮食组、低血糖＋正常饮食组、低血糖＋高脂饮食组各12只,在第20周末处死,测血清空腹血糖（FBG）、血清空腹胰岛素（FINS）、脂肪酸、总胆固醇（TCH）、三酰甘油（TG）、丙氨酸氨基转移酶（ALT）、天门冬氨酸氨基转移酶（AST）等指标。肝组织石蜡切片染色判断肝脂变和炎症活动情况。结果20周末大鼠胰岛素抵抗指数（IRI）、脂肪酸、TG、ALT、AST在正常血糖＋高脂饮食组、低血糖＋正常饮食组中明显高于正常血糖＋正常饮食组,低血糖＋高脂饮食组中明显高于正常血糖＋高脂饮食组、低血糖＋正常饮食组;TCH在正常血糖＋高脂饮食组、低血糖＋高脂饮食组中明显高于正常血糖＋正常饮食组、低血糖＋正常饮食组。病理学指标检测中,肝脂变指数及炎症指数在正常血糖＋高脂饮食组、低血糖＋正常饮食组中明显高于正常血糖＋正常饮食组,低血糖＋高脂饮食组中明显高于正常血糖＋高脂饮食组、低血糖＋正常饮食组。结论新生大鼠低血糖所导致的代谢紊乱会导致NAFLD的发生。