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1.
Nonalcoholic fatty liver disease (NAFLD) is a major clinical consequence for people with obesity and metabolic syndrome and is also associated with enteral and parenteral nutrition. Early studies suggested that altered gut microbiota might contribute to obesity by affecting energy harvest from the diet and energy storage in the host. Recent evidence in humans as well as in animal models has linked gut microbiota to the development of NAFLD through the gut‐liver axis. With bacterial overgrowth and increased intestinal permeability observed in patients with NAFLD and in animal models, gut‐derived bacterial products such as endotoxin (lipopolysaccharide) and bacterial DNA are being delivered to the liver through the portal vein and then activate Toll‐like receptors (TLRs), mainly TLR4 and TLR9, and their downstream cytokines and chemokines, leading to the development and progression of NAFLD. Given the limited data in humans, the role of gut microbiota in the pathogenesis of NAFLD is still open to discussion. Prebiotics and probiotics have been attempted to modify the microbiota as preventive or therapeutic strategies on this pathological condition. Their beneficial effects on NALFD have been demonstrated in animal models and limited human studies. However, prospective, appropriately powered, randomized, controlled clinical trials are needed to determine whether prebiotics and probiotics and other integrated strategies to modify intestinal microbiota are efficacious therapeutic modalities to treat NALFD. 相似文献
2.
Objective: There is a promising perspective regarding the potential effect of resveratrol in preventing and treating metabolic disturbances similar to that of calorie restriction. The aim of this study was to evaluate the effects of calorie-restricted (CR) diet on metabolic parameters and then to investigate whether resveratrol supplementation has beneficial effects similar to CR diet in patients with nonalcoholic fatty liver disease (NAFLD). Methods: This randomized controlled clinical trial was conducted in 90 patients with NAFLD (males and females) aged 20 to 60 years with body mass index (BMI) ranging from 25 to 35 kg/m2. Participants were assigned to one of three intervention groups as follows: The CR diet group (n = 30) received a prescribed low-calorie diet, the resveratrol group (n = 30) received 600 mg pure trans-resveratrol (2 × 300 mg) daily, and the placebo group (n = 30) received placebo capsules (2 × 300 mg) daily for 12 weeks. Fasting blood samples, anthropometric measurements, and dietary intake and physical activity data were collected for all participants at baseline and at the end of the trial. Results: CR diet significantly reduced weight (by 4.5%); BMI; waist circumference; waist-to-hip ratio; and serum alanine aminotransferase (ALT), aspartate aminotransferase (AST), and lipid profiles in participants compared to resveratrol and placebo (all p < 0.05). Significant reductions in weight (by 1.1%) and BMI were found in the resveratrol group compared to the placebo group (p < 0.05). ALT, AST, and lipid profiles did not change significantly in the resveratrol group (all p > 0.05). No significant changes were seen in hepatic steatosis grade, serum glycemic parameters, and high-density lipoprotein cholesterol and sirtuin-1 levels in any group (all p > 0.05). Conclusions: CR diet with moderate weight loss has favorable effects on NAFLD, and resveratrol supplementation induced weight loss but failed to mimic other aspects of CR diet. Future studies are warranted to evaluate the long-term and dose-dependent effects of resveratrol on metabolic diseases. 相似文献
3.
Nonalcoholic fatty liver disease (NAFLD) is characterized by lipotoxicity and ectopic lipid deposition within hepatocytes. Sulforaphane (SFA), an active compound used for inhibiting tumors, was found to have the potency to improve lipid metabolism. However, its molecular mechanisms on ameliorating NAFLD are still incompletely understood. This research evaluated if SFA could inhibit hepatic steatosis and apoptosis. The effects of SFA on cell viability, lipid accumulation, triglyceride (TG) contents, apoptosis, ceramide contents, and reactive oxygen species (ROS) levels were analyzed in palmitic acid (PA)-treated HepG2 cells and high-fat diet (HFD)-fed mice. The related molecular mechanisms were further explored in hepatocytes. The results showed SFA alleviated lipid accumulation and regulated AMPK/SREBP1c/FAS signaling pathway in PA-stressed HepG2 cells. In addition, SFA alleviated PA-mediated apoptosis, downregulated the expressions of cleaved caspase 3, as well as reduced ceramide contents and ROS levels. Moreover, SFA treatment reduced HFD-induced body weight gain, alleviated insulin resistance, decreased serum TG, total cholesterol (TC), and alanine aminotransferase (ALT) levels, and prevented lipid deposition and apoptosis in the liver. This study showed SFA suppressed lipid deposition and apoptosis both in vitro and in vivo, indicating that SFA may be a potential candidate for preventing and treating NAFLD. 相似文献
4.
Objective: Nonalcoholic fatty liver disease (NAFLD) is considered by some to be the hepatic manifestation of the metabolic syndrome (MS). However, others believe NAFLD is a distinct entity that actually initiates MS. Whichever is true, a definite linkage exists between both is generally accepted based upon the frequency of common occurrence and realization that insulin resistance (IR) is and realization that. The objective is to better understand the relationship between NAFLD and MS. Specifically, is there any concrete evidence that development of NAFLD precedes MS or vice versa? Another goal was to better comprehend capabilities of circulating aminotransferases (aspartate aminotransferase [AST] and alanine aminotransferase [ALT]) and their ratio used commonly for diagnosis of NAFLD. Methods: Data from 288 participants with fasting blood glucose (FBG) levels below the diabetic level (<125 mg/dL) and AST and ALT values in the normal range (<40 U/L) were examined. Correlations between ALT and AST and their ratio as independent variables with a variety of metabolic parameter were evaluated and compared. Results: Like FBG, many significant positive correlations among glucose–insulin indices, body composition, blood pressure, dyslipidemias, and inflammation were discovered using ALT, and less so with AST, as the independent variable. In some cases, even stronger correlations in a negative direction with IR and MS were found with the ratio AST/ALT. Corroboration occurred when values in the lowest and highest quartiles of ALT and AST/ALT readings showed appropriate statistically significant differences. Conclusions: The findings here suggest that both NAFLD and the MS very early in development have a common inciting mechanism(s)—most likely IR. Accordingly, the early concurrent temporal results are consistent with the concept that NAFLD is a hepatic manifestation of the IR associated with the MS. They do not exclude the possibility that once some liver functional adjustments take place, several aspects of the MS are bolstered further, perhaps via intensified heightening of IR. 相似文献
5.
ABSTRACTObjective: Considering the high prevalence of nonalcoholic fatty liver disease and based on the evidence about the role of dietary cholesterol in liver inflammation, and also with regard to the effect of phytosterols on the metabolism of cholesterol, we aimed at exploring the therapeutic potential of phytosterol supplementation against nonalcoholic fatty liver disease. Method: Thirty-eight patients with nonalcoholic fatty liver disease were randomly divided into two groups: The phytosterol group (n = 19) received a 1.6-g phytosterol supplement daily and the control group (n = 19) received 1.6 g starch daily as placebo for an 8-week period. Blood samples of all patients were taken at baseline (week 0) and at the end of the study (week 8) for measurement of lipid profiles, liver enzymes, inflammatory markers, adiponectin, and leptin. Results: Phytosterol supplementation significantly improved the levels of low-density lipoprotein cholesterol, aspartate aminotransferase, alanine aminotransferase, and tumor necrosis factor alpha compared to the placebo group. On the other hand, there were no significant differences between the two groups in total cholesterol, triglycerides, high-density lipoprotein cholesterol, very-low-density lipoprotein cholesterol, ratios of low-density lipoprotein cholesterol/high-density lipoprotein cholesterol and total cholesterol/high-density lipoprotein cholesterol, gamma-glutamyl transferase, interleukin 6, high-sensitivity C-reactive protein, adiponectin, and leptin. Conclusions: The present study suggested that daily consumption of 1.6 g phytosterols efficiently lowers low-density lipoprotein cholesterol, aspartate aminotransferase, alanine aminotransferase, and tumor necrosis factor alpha in patients with nonalcoholic fatty liver disease. 相似文献
6.
目的探讨血清铁蛋白(sF)水平在成人非酒精性脂肪性肝病(NAFLD)患者中的临床意义。方法对入选的158例健康体检人群,进行血清铁蛋白、总胆固醇(TC)、甘油三酯(TG)、高密度脂蛋白(HDL—C)、低密度脂蛋白(LDL—C)、空腹血糖(FBG)、血尿酸(UA)、谷草转氨酶(AST)及谷丙转氨酶(ALT)等各指标检测及肝脏超声检查,根据肝脏超声结果分为NAFLD组(68例)及正常对照组(90例),比较两组间血清铁蛋白水平及血脂、血糖、尿酸、转氨酶等生化指标情况。结果NAFLD组中血清铁蛋白水平及甘油三酯、尿酸、转氨酶明显高于对照组,而高密度脂蛋白明显低于对照组(p〈0.01);进一步相关性分析显示.血清铁蛋白与谷草转氨酶及谷丙转氨酶显著相关(r=0.260、0.299,P〈0.01)。结论血清铁蛋白水平的升高可能提示NAFLD患者肝损的一个有效指标,并在NAFLD的进展过程中可能起一定的作用。 相似文献
7.
Nonalcoholic fatty liver disease (NAFLD) is a hepatic ailment with a rapidly increasing incidence due to dietary hypernutrition and subsequent obesity. Fatty liver disease can lead to steatohepatitis, fibrosis, cirrhosis, and even cancer, which is associated with various complications. Discovering effective natural materials and herbs can provide alternative and complementary medical treatments to current chemical pharmaceuticals. To develop an effective natural agent for NAFLD, we formulated a combination of four herb mixtures (KIOM2012H) and observed lipid-lowering efficacy. The inhibitory effects of KIOM2012H on free fatty acid-induced lipid accumulation, triglyceride contents, and gene expressions were analyzed in HepG2 cells. Using high fat diet-fed mice, body weight changes, gross liver appearances, hepatic triglyceride contents, and gene expressions were evaluated. KIOM2012H dose-dependently inhibited lipid accumulation and gene expressions involved in lipogenesis and related regulators. Experimental animals also showed a decrease in body weight changes and lipid-associated physiological parameters. This study shows that KIOM2012H has an alleviating effect on fatty acid and lipid accumulation, and therefore can be applied for development of new therapeutic pharmaceuticals for treatment of NAFLD using natural products and herbs. 相似文献
8.
Nonalcoholic fatty liver disease (NAFLD) encompasses a spectrum of liver diseases in the absence of significant alcohol consumption, and its incidence is paralleling the increasing numbers of overweight and obese individuals worldwide. This review discusses the pathogenesis of NAFLD, including the roles potentially played by specific adipokines, such as TNF-α, leptin, and adiponectin. Clinical features, diagnosis, and potential methods of management are also addressed to assist practitioners with the management of this growing population of patients. 相似文献
9.
Nonalcoholic fatty liver disease (NAFLD) is an emerging global health concern. It is the most common form of chronic liver disease in Western countries, affecting both adults and children. NAFLD encompasses a broad spectrum of fatty liver disease, ranging from simple steatosis (NAFL) to nonalcoholic steatohepatitis (NASH), and is strongly associated with obesity, insulin resistance, and dyslipidemia. First-line therapy for NAFLD includes weight loss achieved through diet and physical activity. However, there is a lack of evidenced-based dietary recommendations. The American Diabetes Association’s (ADA) recommendations that aim to reduce the risk of diabetes and cardiovascular disease may also be applicable to the NAFLD population. The objectives of this review are to: (1) provide an overview of NAFLD in the context of insulin resistance, and (2) provide a rationale for applying relevant aspects of the ADA recommendations to the nutritional management of NAFLD. 相似文献
10.
With the increasing prevalence of obesity and type 2 diabetes mellitus in the general population, nonalcoholic fatty liver disease (NAFLD) has become a common diagnosis in clinical practice. Insulin resistance and oxidative stress play an important role in NAFLD development and progression. NAFLD affects one in three adults and one in 10 children/adolescents in the United States. Mortality in patients with NAFLD is significantly higher than in the general population of same age and gender with liver-related complications. Lifestyle intervention may improve NAFLD, but medications that increase insulin sensitivity and the anti-oxidant defenses in the liver deserve evaluation in carefully controlled trials. 相似文献
11.
Objective: Nonalcoholic fatty liver disease (NAFLD) is a condition defined by exceeding triglycerides accumulation in the liver. The condition can develop into fibrosis, cirrhosis, and hepatocellular carcinoma. Considering the ever-increasing prevalence of NAFLD, the aim of the present study was to investigate the effects of probiotic supplementation on glycemic and inflammatory indices in patients with NAFLD. Methods: This randomized clinical trial was conducted on 42 patients with NAFLD who had been referred to a gastroenterology clinic. Subjects in the intervention and control groups consumed 2 capsules/day probiotic or placebo, respectively, for 8 weeks. Fasting blood sugar (FBS), insulin, insulin resistance, tumor necrosis factor alpha (TNF-α), and interleukin 6 (IL-6) were measured at baseline and at the end of the study. Results: Means of FBS, insulin, insulin resistance, and IL-6 were significantly different between groups after intervention (p < 0.05), whereas TNF-α was not significantly modified (p > 0.05). In the probiotic group, insulin, insulin resistance, TNF-α, and IL-6 decreased significantly at the end of the study compared to the beginning of study. Conclusion: Considering the effects of probiotic supplementation on the reduction of glycemic and inflammatory indices in patients with NAFLD, consumption of probiotics is recommended as a complementary therapy in these patients. 相似文献
12.
Background: Nonalcoholic fatty liver disease (NAFLD) is a chronic liver disorder related to inflammation. Coenzyme Q10 (CoQ10) is a natural compound that has recently been considered as an anti-inflammatory factor. In the current study we aimed to evaluate the effects of CoQ10 supplementation on liver enzymes, inflammation status, and adipokines in patients with NAFLD. Methods: Forty-one subjects with NAFLD participated in the current randomized, double-blind, placebo-controlled trial. The participants were randomly divided into 2 groups: one group received CoQ10 capsules (100 mg once a day) and the other received placebo for 12 weeks. Blood samples of each patient were taken before and after the 12-week intervention period for measurement of liver aminotransferases, inflammatory biomarkers, and adipokines (adiponectin and leptin). Results: Taking 100 mg CoQ10 supplement daily resulted in a significant decrease in liver aminotransferases (aspartate aminotransferase [AST] and gamma-glutamyl transpeptidase [GGT]), high-sensitivity C-reactive protein (hs-CRP), tumor necrosis factor α, and the grades of NAFLD in the CoQ10 group in comparison to the control group (p < 0.05). In addition, patients who received CoQ10 supplement had higher serum levels of adiponectin (p = 0.016) and considerable changes in serum leptin (p = 0.053). However, no significant changes occurred in serum levels of interleukin-6 in both groups. Conclusion: The present study suggested that CoQ10 supplement at a dosage of 100 mg could be effective for improving the systemic inflammation and biochemical variables in NAFLD. 相似文献
13.
Nonalcoholic fatty liver disease (NAFLD) is the most common chronic liver disease worldwide. It is a progressive disorder involving a spectrum of conditions that include pure steatosis without inflammation, nonalcoholic steatohepatitis (NASH), fibrosis and cirrhosis. The key factor in the pathophysiology of NAFLD is insulin resistance that determines lipid accumulation in the hepatocytes, which may be followed by lipid peroxidation, production of reactive oxygen species and consequent inflammation. Recent studies suggest that the characteristics of the gut microbiota are altered in NAFLD, and also, that small intestinal bacterial overgrowth (SIBO) contributes to the pathogenesis of this condition. This review presents the chief findings from all the controlled studies that evaluated SIBO, gut permeability and endotoxemia in human NAFLD. We also discuss the possible mechanisms involving SIBO, lipid accumulation and development of NASH. The understanding of these mechanisms may allow the development of new targets for NASH treatment in the future. 相似文献
14.
目的观察营养干预对肝炎后非酒精性脂肪肝(NAFL)的改善。方法52例肝炎后NAFL患者随机分为观察组(n=29)和对照组(n=23),两组给予相同的药物治疗,观察组另给予为期6个月的营养干预,对照组则自主选择食物。结果观察组经营养干预后人体各项测量值,天冬氨酸转移酶、丙氨酸转移酶、甘油三脂、血糖和胆固醇、低密度脂蛋白水平明显低于对照组(P<0.05~0.01),高密度脂蛋白较对照组明显上升(P<0.05),而总胆红素的水平两组间差异无显著性。B超结果显示,观察组干预后有17例患者脂肪肝得到改善,两组相比差异有显著性(P<0.01)。结论合理的营养干预可以稳定肝炎病情,并使患者脂肪肝得到改善。 相似文献
15.
目的 研究非酒精性脂肪肝模型大鼠的血清C-反应蛋白(CRP)水平变化,探讨其与肝功能之间的关系.方法 实验大鼠分为模型组(HF)、模型恢复组(FC)和对照组(NC).NC组采用基础饲料喂养,HF组采用高脂饲料喂养,FC组高脂喂养8周后改基础饲料喂养.模型建立后取大鼠空腹血测定血清肝酶系、血脂及CRP水平,肝脏标本作组织病理学检查.结果 高脂饲料喂养8周后,大鼠肝脏出现典型脂肪变性及炎症细胞浸润;12周后有重度脂肪变性伴大量炎症细胞浸润.HF组血清肝酶系(ALT、AST)、总胆固醇(TC)、高密度脂蛋白胆固醇(HDL-C)水平均较NC组升高,血清CRP水平(0.43±0.14)mg/L亦高于NC组(0.14±0.08)mg/L.采取饮食控制的FC组肝脏病变程度减轻,ALT、AST、TC和HDL-C水平下降,CRP水平亦较HF组降低(0.21±0.14)mg/L.相关性分析显示脂肪肝大鼠的血清CRP水平与ALT水平正相关(r=0.56,P<0.05).结论 非酒精脂肪肝模型大鼠血清CRP水平升高,并与肝功能指标(ALT水平)正相关,CRP可能是非酒精性脂肪肝的预测因素之一. 相似文献
16.
The present review aims to gather scientific evidence regarding the beneficial effects of microalgae and macroalgae extracts on non-alcoholic fatty liver disease (NAFLD). The described data show that both microalgae and macroalgae improved this alteration. The majority of the reported studies analysed the preventive effects because algae were administered to animals concurrent with the diet that induced NAFLD. The positive effects were demonstrated using a wide range of doses, from 7.5 to 300 mg/kg body weight/day or from 1 to 10% in the diet, and experimental periods ranged from 3 to 16 weeks. Two important limitations on the scientific knowledge available to date are that very few studies have researched the mechanisms of action underlying the preventive effects of microalgae on NAFLD and that, for the majority of the algae studied, a single paper has been reported. For these reasons, it is not possible to establish the best conditions in order to know the beneficial effects that these algae could bring. In this scenario, further studies are needed. Moreover, the beneficial effects of algae observed in rodent need to be confirmed in humans before we can start considering these products as new tools in the fight against fatty liver disease. 相似文献
17.
Dietary modification is essential for treating nonalcoholic fatty liver disease (NAFLD); however, the dietary components are less well defined. We enrolled 252 adults with no history of liver disease and excessive alcohol use to evaluate the relationship between macronutrients and NAFLD and insulin resistance. Participants took photographs of their meals and documented their food intake in a food diary for seven consecutive days. A dietitian estimated the type and portion size of food items and analyzed nutrients with INMUCAL-Nutrients software. Later, participants underwent transient elastography to diagnose NAFLD and blood tests to measure insulin resistance using the homeostasis model. Total energy intake and the proportion of carbohydrate, fat, and protein consumption did not differ between participants with NAFLD ( n = 41) and those without NAFLD ( n = 211). Using multiple logistic regression analysis, daily intake of protein < 1.0 g/kg (OR: 3.66, 95% CI: 1.41–9.52) and full-fat dairy product ≥ 50 g (OR: 0.42, 95% CI: 0.18–0.99) were associated with NAFLD. Insulin resistance was associated with a daily intake of protein < 1.0 g/kg (OR: 3.09, 95% CI: 1.59–6.05), full-fat dairy product ≥ 50 g (OR: 0.46, 95% CI: 0.25–0.82), and dietary fiber ≥ 8 g (OR: 0.41, 95% CI: 0.22–0.74). Our data show that a low protein intake increases the odds for NAFLD and insulin resistance. Contrarily, a high intake of full-fat dairy products and dietary fiber has been associated with a potential protective effect against NAFLD and insulin resistance. 相似文献
18.
目的研究瘦素与非酒精性脂肪肝(NAFL)肝纤维化发生与发展的关系。方法用ELISA方法测定30例NAFL患者血清瘦素水平,20例健康人作为对照组,同时检测NAFL患者的血清肝纤维化指标HA、LN、pcⅢ,对血清瘦素与肝纤维化指标的关系进行分析。结果NAFL患者血清瘦素水平明显高于对照组,轻、中、重度非酒精性脂肪肝患者血清瘦素水平依次增高.差异有显著性(p〈0.05);中、重度非酒精性脂肪肝患者血清瘦素水平与肝纤维化血清学指标呈正相关。结论瘦素在NAFL发病中具有独立的致病作用,并可能是NAFL肝纤维化形成中重要的调控因子之一。 相似文献
19.
目的研究瘦素与非酒精性脂肪肝(NAFL)肝纤维化发生与发展的关系。方法用ELISA方法测定30例NAFL患者血清瘦素水平,20例健康人作为对照组,同时检测NAFL患者的血清肝纤维化指标HA、LN、PCⅢ,对血清瘦素与肝纤维化指标的关系进行分析。结果NAFL患者血清瘦素水平明显高于对照组,轻、中、重度非酒精性脂肪肝患者血清瘦素水平依次增高,差异有显著性(p<0.05);中、重度非酒精性脂肪肝患者血清瘦素水平与肝纤维化血清学指标呈正相关。结论瘦素在NAFL发病中具有独立的致病作用,并可能是NAFL肝纤维化形成中重要的调控因子之一。 相似文献
20.
Objective: KAMUT khorasan is an ancient grain with widely acclaimed health benefits. The aim of this study was to investigate the effects of a replacement diet with ancient khorasan wheat products in patients with NAFLD, in comparison to a similar replacement diet with control products made from organic semi-whole-grain modern wheat. Methods: Forty NAFLD patients (12 M/28 F; age 55.2 ± 10.4 years) with mild to moderate liver steatosis were included. The experimental design was a randomized, double-blind, parallel-arm study with 20 participants assigned to consume either KAMUT khorasan or control wheat products (pasta, bread, crackers, biscuits) over a 3-month period. Anthropometric measurements, blood analyses, and ultrasonography examination were performed at both the beginning and end of each dietary intervention. Results: After the implementation of a general linear model for repeated measurements adjusted for baseline demographic details, risk factors, and medication, alanine aminotransferase (ALT) was significantly reduced by 12%, aspartate aminotransferase (AST) by 14%, alkaline phosphatase (ALP) by 8%, and cholesterol by 6% only in the khorasan group (p < 0.05 for all). Similarly, significant reductions in circulating proinflammatory tumor necrosis factor-alpha by 50%, interleukin l-receptor antagonist-alpha by 37%, interleukin-8 by 24%, and interferon gamma by 24% were evident only in participants who consumed the khorasan products (p < 0.05 for all). Finally, significant improvements in the liver steatosis grading, Doppler perfusion index values, and reactive oxygen species (ROS) production were evident after consumption of both the khorasan and control products. Conclusions: This study suggests that a short-term replacement diet with ancient KAMUT khorasan products is most effective in reducing metabolic risk factors and ameliorating the liver profile in patients with NAFLD. 相似文献
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