樟树籽仁油对高脂诱导型肥胖小鼠体脂和血脂水平的影响

采用不同樟树籽仁油(CCSKO)含量的高脂饲料干预营养型肥胖小鼠,研究高脂饲料中樟树籽仁油的含量对樟树籽仁油降低营养型肥胖小鼠体脂和血脂效果的影响。正常C57BL/6小鼠饲喂基础饲料作为正常对照组(NC组),同时采用高脂饲料诱发C57BL/6小鼠产生营养型肥胖。将肥胖小鼠随机分为基础饲料恢复组(NR组)、高脂猪油组(HF组)、含21. 91%CCSKO(CCSKO替换25%猪油)的高脂饲料组(HF-25%CCSKO组)、含43. 83%CCSKO(CCSKO替换50%猪油)的高脂饲料组(HF-50%CCSKO组)、含87. 66%CCSKO(CCSKO替换100%猪油)的高脂饲料组(HF-100%CCSKO组),连续喂养10周,测定小鼠体重、体长、腹部脂肪质量及血清相关生化指标,分析肝脏组织切片。结果表明:HF-50%CCSKO组、HF-100%CCSKO组的体重、腹部脂肪质量和血清ALT、AST水平比HF组显著降低,HF-100%CCSKO组的TC、LDL-C、LDL-C/HDL-C水平比HF组显著降低。HF-50%CCSKO组的TC、LDL-C、LDL-C/HDL-C水平与HF组相...     

注射级玉米卵磷脂对高脂饮食大鼠的降血脂作用

探究注射级玉米卵磷脂（CLFI）对高脂膳食诱导的大鼠的降血脂作用。将60 只雄性SD大鼠随机分为6 组,即空白对照组、高脂模型组、阳性对照组（1.2 g/kg大豆卵磷脂）和CLFI高（2.4 g/kg）、中（1.2 g/kg）和低（0.6 g/kg）剂量组。除空白对照组给予基础饲料外,其余各组均给予高脂饲料,喂养2 周后开始对阳性对照组和CLFI各剂量组连续灌胃给药6 周,每天1 次。空白对照组和高脂模型组给予蒸馏水10 mL/kg。试验结束后考察大鼠血清血脂水平变化,检测大鼠体重、腹腔脂肪蓄积系数（AFC）、血清及肝脏中超氧化物歧化酶（SOD）活力和丙二醛（MDA）水平等指标,并观察肝脏的组织形态变化。结果表明：CLFI能有效抑制高脂膳食诱导大鼠的体重增长,降低血清中甘油三酯（TG）、总胆固醇（TC）、低密度脂蛋白胆固醇（LDL-C）、MDA水平和动脉粥样硬化指数（AI）、血脂综合指数（LCI）,并且降低AFC和肝脏中MDA水平;此外,高密度脂蛋白胆固醇（HDL-C）和SOD水平都有不同程度的提升,肝脏脂肪变性情况也得到改善。CLFI对高脂血症大鼠具有较好的降血脂和预防肝脏脂肪变性的作用,可为CLFI后续的开发和产业化应用提供一定的理论依据。     

Effects of haw pectic oligosaccharide on lipid metabolism and oxidative stress in experimental hyperlipidemia mice induced by high-fat diet

The anti-hyperlipidemic and antioxidant effects of haw pectic oligosaccharide (HPOS) were investigated using a model of hyperlipidemia induced by a high-fat diet in mice. HPOS significantly lowered the serum levels of total cholesterol (p < 0.01) and triglycerides (p < 0.05) and inhibited the accumulation of body fat in this model. It significantly enhanced the activity of superoxide dismutase to suppress oxidative reactions (p < 0.01) and inhibited the synthesis and accumulation of malondialdehyde in serum (p < 0.05). Thus, HPOS could be valuable in the development of nutritional and drug therapies to combat cardiovascular diseases.     

荞麦粉对高脂膳食大鼠体内抗氧化活性的影响

研究了荞麦粉（buckwheat,BW）对高脂膳食大鼠体内抗氧化活性的影响。将50只成年Wistar雄性大鼠随机分为基础对照组、高脂模型对照组、荞麦粉低、中、高剂量组（1、5、10g/kg·d）,喂养30d后,测定血清中超氧化物歧化酶（SOD）、谷胱甘肽过氧化物酶（GSH-PX）的活性及丙二醛（MDA）的含量和肝脏组织中超氧化物歧化酶（SOD）活性及丙二醛（MDA）的含量;并观察主动脉结构。结果显示,荞麦粉中、高剂量组与模型对照组相比,荞麦粉可使高脂膳食大鼠血清SOD、GSH-PX的活性增强（p<0.05）及MDA的含量显著减少（p<0.05）;可使肝脏中SOD活性显著增强（p<0.05）,但MDA的含量显著减少（p<0.05）;主动脉光镜结构显示荞麦粉对高脂膳食大鼠肝脏具有保护作用。说明荞麦粉具有调节高脂膳食大鼠抗氧化的能力。      

燕麦膳食纤维对食源性肥胖小鼠降脂减肥作用研究

深入研究水溶性及水不溶性燕麦膳食纤维降脂减肥作用的效果。60只昆明小鼠,饲喂高脂饲料构建肥胖模型后,分别饲喂添加低、高剂量(7.33、14.67 g·kg-1(BW)·d-1)的燕麦水溶性(SDF)水不溶性(IDF)膳食纤维的高脂饲料作为试验组,另设饲喂普通饲料和高脂饲料作为正常对照组和肥胖模型组。测定相关指标的变化。与肥胖模型组相比,肥胖小鼠在食用燕麦膳食纤维以后,Lee’s指数显著下降(P0.05),IDF效果最好;腹腔脂肪堆积显著减少(P0.05),激素敏感性脂肪酶显著升高(P0.05),同时胰岛素分泌减少促甲状腺激素分泌增加(P0.05),SDF作用效果高于IDF(P0.05);小鼠肝脏系数、肝脏总胆固醇(TC)和三酰甘油(TG)水平显著降低(P0.05),肝脏肝酯酶(HL)和脂蛋白酯酶(LPL)活性升高(P0.05),但是与正常组对照小鼠相比仍有显著差异(P0.05),SDF效果比IDF更显著。燕麦SDF和IDF都具有降脂减肥作用,存在剂量效应,但作用途径不同。     

亚麻籽饼对饲喂高脂日粮大鼠血浆中脂质及氧化应激改善作用的研究

研究了亚麻籽饼对饲喂高脂日粮大鼠血浆中血脂代谢和抗氧化能力的影响。将40只SD大鼠分成4组(n=10):正常组、高脂模型对照组、低剂量亚麻籽饼组(10%亚麻籽饼)、高剂量亚麻籽饼组(20%亚麻籽饼)。10周后处死SD大鼠,测定其血浆中总胆固醇(TC)、甘油三酯(TG)、低密度脂蛋白胆固醇(LDL-C)、高密度脂蛋白胆固醇(HDL-C)的水平,同时测定血浆中谷胱甘肽过氧化物酶(GSH-Px)、超氧化物歧化酶(SOD)、过氧化氢酶(CAT)的活性以及还原型谷胱甘肽(GSH)、丙二醛(MDA)的含量。结果表明:亚麻籽饼可以显著降低SD大鼠血浆中TC、TG、LDL-C的水平,但对HDL-C无显著影响;亚麻籽饼可以提高SD大鼠血浆中GSH-Px、SOD、CAT的活性,同时增加GSH水平,降低MDA的含量。研究表明:亚麻籽饼可以改善饲喂高脂日粮对SD大鼠机体产生的不良影响,能够有效地提高抗氧化能力,缓解氧化应激和调节血脂代谢。     

高氯酸盐对高脂膳食小鼠脂质代谢的影响

目的 探究高氯酸盐对高脂膳食小鼠脂质代谢的影响。方法 将C57BL/6J小鼠分为4组,分别为对照组(CG)、高氯酸盐低剂量组[LG,每天0.1 mg/(kg·bw)]、中剂量组[MG,每天1.0 mg/(kg·bw)]和高剂量组[HG,每天10.0 mg/(kg·bw)],连续暴露12周,通过对肝脏油红O染色、血生化指标检测、脂代谢调控酶测定和脂肪酸组成及含量测定进行高氯酸盐对高脂膳食小鼠脂质代谢的评估。结果 高于1.0mg/(kg·bw)的暴露剂量可在小鼠肝脏内形成脂滴累积,总胆固醇、甘油三酯和高密度脂蛋白胆固醇含量均显著性升高(P<0.05),并且HG组脂质代谢关键调控酶乙酰辅酶A羧化酶(acetyl-CoAcarboxylase,ACC)和脂肪酸合成酶(fattyacidsynthase,FAS)含量显著性升高(P<0.05),表明高氯酸盐可能会促进脂肪的合成。随着高氯酸盐暴露浓度的增加,棕榈酸(C16:0)、珍珠酸(C17:0)、硬脂酸(C18:0)、花生四烯酸(C20:4)和二十二碳六烯酸(C22:6)体内水平显著下降,而棕榈亚酸(C16:1)、油酸(C18:1)...     

高脂饮食诱导高脂血症大鼠及不同器官病理变化

通过高脂饮食建立高脂血症大鼠模型,观察高脂血症大鼠体内程序性死亡受体1(PD-1)的表达变化。将40只雄性SD大鼠分为2组,分别饲喂普通饲料和高脂饲料12周,计算大鼠的肝脏、脾脏和胰腺指数,测定大鼠全血血糖,检测大鼠血清中甘油三酯(TG)、总胆固醇(T-CHO)、高密度脂蛋白胆固醇(HDL-C)和低密度脂蛋白胆固醇(LDL-C)的含量,通过HE染色检测大鼠肝脏的病理变化,同时采用RT-q PCR检测PD-1 mRNA在大鼠肝脏、脾脏和胰腺组织内的表达变化。结果表明:高脂饲料组大鼠的肝脏、脾脏和胰腺指数显著高于普通饲料组;高脂饲料组大鼠的血糖显著升高;高脂饲料组大鼠血清中的TG、T-CHO、LDL-C的含量均显著高于普通饲料组,LDLC/HDL-C的比值也显著高于普通饲料组,高脂血症大鼠造模成功。HE染色显示高脂饲料组大鼠肝脏组织内均出现明显脂肪空泡。与普通饲料组相比,高脂饲料组大鼠肝脏、脾脏和胰腺组织内PD-1 mRNA的表达均显著降低,提示PD-1可能参与了高脂血症的发生和发展。     

Antihyperlipidemic effects of buckwheat leaf and flower in rats fed a high-fat diet

This study was conducted to investigate the hypolipidemic effects of a powdered whole buckwheat leaf and flower mixture in rats fed a high-fat diet. Male Sprague–Dawley rats were divided into three groups: normal control (NC), high-fat (HF), and high-fat supplemented with a mixture of powdered buckwheat leaf and flower (BLF; 5%, wt/wt) groups. The plasma total cholesterol and triglyceride concentrations were significantly lower in the BLF group than in the other groups. Hepatic cholesterol and triglyceride values of the BLF group were similar to those of the NC group. This plant part mixture elevated the faecal triglyceride and acidic sterol level in the BLF group. The result suggest that the beneficial effect of this buckwheat plant portion on plasma and hepatic lipid profiles in high-fat fed rats is partly mediated by higher excretion of faecal lipids and synergistic effect of phenolic compounds and fibre present in the BLF.     

Hypolipidemic and antioxidant effects of total flavonoids of Perilla Frutescens leaves in hyperlipidemia rats induced by high-fat diet

The leaves of Perilla frutescens are often used as a new source of additives for the food and pharmaceutical industries due to its unique bioactivities. This study was to evaluate the chemical composition and hyperlipidemic and antioxidant effects of total flavonoids of P. frutescens leaves (TFP) in the hyperlipidemia rats induced by a high-fat diet. By HPLC analysis, TFP mainly consisted of apigenin with a smaller amount of luteolin. At doses of 50-200 mg/kg, oral administration of TFP to hyperlipidemia rats was highly effective in decreasing the levels of serum total cholesterol (TC), triacylglycerols (TG), low-density lipoprotein-cholesterol (LDL-c), and adipose tissue lipid accumulation, increasing the levels of serum high-density lipoprotein-cholesterol (HDL-c), adjusting metabolic disturbance of lipoprotein, increasing antioxidant enzyme activity and repressing development of atherosclerosis. It suggested that TFP had significant health benefits and could be explored as a potentially promising food additive for the prevention of hyperlipidemia diseases.     

Antiatherogenic and antioxidative effects of Houttuynia cordata extracts in rats fed a high-fat diet

The purpose of this study was to evaluate the effects of ethanolic extracts from Houttuynia cordata on the serum lipid profile and hepatic lipid peroxidation in rats. Animals were fed either a normal or high-fat diet (HFD) containing 0, 1 or 5% H. cordata extracts for 8 weeks. Dietary supplementation of H. cordata extracts at 1 and 5% normalized the HFD-induced weight gain in rats without a significant change in food intake. The H. cordata extracts dose-dependently increased serum HDL cholesterol levels in HFD-fed rats, resulting in a more than 2.5-fold decrease in atherogenic index. Lipid hydroperoxide content in the liver was significantly increased by HFD feeding, and the supplementation of H. cordata extracts at 5% reversed the hydroperoxide content to the level in the normally fed control group. Consistent with reduced hepatic lipid hydroperoxide, animals fed H. cordata extracts exhibited reduced thiobarbituric acid reactive substances (TBARS) levels in the liver and serum. These findings suggest that the ethanolic extracts from H. cordata reduces atherogenic risk and hepatic oxidative damage induced by HFD consumption in rats.     

Dose dependent effects of lycopene enriched tomato-wine on liver and adipose tissue in high-fat diet fed rats

The functional effects of tomato-wine with varying lycopene content on high-fat diet (HFD) fed rats are unknown. Male Sprague–Dawley rats (n = 50) were randomly divided into five groups and fed a HFD (35% kcal fat) with ethanol (7.2% kcal alcohol), tomato-wine with varying lycopene content (0.425, 1.140 or 2.045 mg% lycopene) or an isocaloric control diet for 6 weeks. Morphological, toxicological and metabolic analysis was conducted in liver, adipose, plasma and faeces. Body weight gain, adipose and liver weight was reduced in HFD fed rats administered tomato-wine with varying lycopene content, although tomato-wine with higher lycopene was more effective. The anti-obesity effect of tomato wine appears to be partially mediated through the inhibition of fatty acid synthesis and lipid droplet formation. Furthermore, tomato-wine appears to have an anti-atherogenic effect via augmentation of plasma HDL-C levels. The present findings suggest tomato-wine fortified with lycopene may be an effective anti-obesity agent.     

Antioxidant effect of grapevine leaf extract on the oxidative stress induced by a high-fat diet in rats

This study was conducted to investigate the effect of grapevine leaf extract (GLE) on the oxidative stress of rats fed a high-fat diet. Rats were divided into six groups: a normal diet with 0% (NC), 1.0% (NG1.0), and 1.5% GLE (NG1.5); and a high-fat diet with 0% (HFC), 1.0% (HFG1.0), and 1.5% GLE (HFG1.5). Treatment with GLE to the high-fat diet reduced lipid peroxide concentrations in plasma and liver compared to those of HFC rats. Total glutathione and GSH/GSSG of the groups with GLE were higher than those of untreated groups. Hepatic glutathione peroxidase, glutathione-S-transferase, and glutathione reductase activities along with catalase and glutathione peroxidase activities in erythrocytes increased after GLE treatment to high-fat diet compared with HFC rats. Hepatic retinol and tocopherol increased in HFG1.5 group compared to those of HFC group. These results indicate that GLE can protect against oxidative stress induced by a high-fat diet in rats.     

Alterations in antioxidant status of rats following intake of ginger through diet

Ginger is known to possess potent antioxidant and anti-inflammatory properties. Therefore, in vivo studies in rats were initiated to investigate if ginger fed through diet can improve their antioxidant status. Inbred male Wistar/NIN rats were divided into four groups containing six animals per group. The 1st group received a stock diet whereas the 2nd, 3rd and 4th groups were fed with a diet incorporating ginger powder at 0.5%, 1% and 5% levels for a period of one month. After one month of feeding, rats were sacrificed and their livers and kidneys collected for the analysis of antioxidant enzymes like superoxide dismutase (SOD), catalase and glutathione peroxidase (GSHPx), and to estimate lipid peroxidation and protein oxidation. The levels of all the three enzymes, which are the important components of antioxidative defenses, were significantly stimulated in the livers of groups fed with ginger. The significant reduction in lipid peroxidation in livers and kidneys and inhibition of protein oxidative products in livers indicated the antioxidant potential of ginger when consumed naturally through diet. The findings reported suggest that regular intake of ginger through diet can protect against oxidative tissue damage.     

Repressive effects of red bean,Phaseolus angularis,extracts on obesity of mouse induced with high-fat diet via downregulation of adipocyte differentiation and modulating lipid metabolism

Food Science and Biotechnology - Obesity is generally caused by quantitative changes in adipocyte differentiation and fat metabolism. Only a few studies have been determined the effect of red beans...     

脱脂麦胚乙醇提取物对饲喂高脂日粮小鼠抗氧化能力和血脂代谢的影响

研究了脱脂麦胚50％和70％乙醇提取物对饲喂高脂日粮小鼠抗氧化能力和血脂代谢的影响.选取60只4周龄雄性C57BL/6小鼠,按体重随机分成6组,分别是正常组、高脂组、低剂量50％醇提组、高剂量50％醇提组、低剂量70％醇提组和高剂量70％醇提组.结果表明:在高脂日粮中添加脱脂麦胚50％醇提物和70％醇提物均能够显著提高小鼠各组织中总抗氧化能力以及超氧化物歧化酶、过氧化氢酶、谷胱甘肽过氧化物酶等抗氧化酶的活性,降低丙二醛含量;醇提物的添加可以有效提高小鼠机体血清中高密度脂蛋白胆固醇水平,降低甘油三酯、总胆固醇和低密度脂蛋白胆固醇水平.脱脂麦胚50％醇提物和70％醇提物可以改善饲喂高脂日粮对小鼠机体产生的不良影响,能够有效地缓解氧化应激和调节血脂代谢,呈现了降脂和抗氧化活性.     

不同粒径毛木耳粉对高脂诱导肥胖大鼠的作用研究

目的:比较不同目数毛木耳粉对高脂性营养饮食诱发性肥胖大鼠的减肥降脂功效。方法:利用高脂营养饲料诱发SD大鼠肥胖模型的同时,给予不同目数毛木耳粉混悬液,观察摄食量、动物体重的变化,检测动物血脂水平,计算脂体比。结果:在各组食物利用率无显著性差异情况下,100~200、200~300、300~400目和400目以上毛木耳粉组大鼠体重均低于模型对照组,从第4周开始有显著性差异(p<0.05或p<0.01);100~200、200~300、300~400目和400目以上毛木耳粉组体重增加量比模型对照组显著性降低(p<0.05或p<0.01),同时,400目以上毛木耳粉组大鼠的脂重、脂体比和低密度脂蛋白均明显低于模型对照组(p<0.05)。结论:100~200、200~300、300~400目和400目以上毛木耳粉有预防性减肥作用,其中300~400目和400目以上毛木耳粉的效果更显著。此外,400目以上毛木耳粉还有降脂功效。      

元宝枫籽油对高脂膳食小鼠脂代谢及肠道健康的影响北大核心CSCD

为了进一步开发与应用元宝枫籽油,研究了元宝枫籽油对高脂膳食小鼠脂代谢及肠道健康的影响。将60只小鼠分为空白组、模型组、元宝枫籽油高剂量组[1 200 mg/(kg·d)]和低剂量组[600 mg/(kg·d)],连续灌胃60 d。实验结束后,测定小鼠生长状况、血脂水平、盲肠微环境指标和盲肠内容物短链脂肪酸及微生物菌群。结果表明:与模型组相比,元宝枫籽油高剂量组能显著降低小鼠体质量、腰围、Lee′s指数、腹腔脂肪质量,显著降低小鼠盲肠内容物中游离氨、氨态氮、硫化氢和pH,显著增加盲肠内容物中丁酸、戊酸和丙酸的含量;元宝枫籽油高、低剂量组可显著降低小鼠血清中甘油三酯(TG)、总胆固醇(TC)和低密度脂蛋白胆固醇(LDL-C)的水平,显著升高高密度脂蛋白胆固醇(HDL-C)水平,显著促进肠道有益微生物的生长,抑制有害菌的生长。因此,元宝枫籽油具有改善因高脂膳食引起的小鼠脂代谢紊乱和促进肠道健康的作用。     

不同粒径毛木耳粉对高脂诱导肥胖大鼠的作用研究

目的:比较不同目数毛木耳粉对高脂性营养饮食诱发性肥胖大鼠的减肥降脂功效。方法:利用高脂营养饲料诱发SD大鼠肥胖模型的同时,给予不同目数毛木耳粉混悬液,观察摄食量、动物体重的变化,检测动物血脂水平,计算脂体比。结果:在各组食物利用率无显著性差异情况下,100~200、200~300、300~400目和400目以上毛木耳粉组大鼠体重均低于模型对照组,从第4周开始有显著性差异(p0.05或p0.01);100~200、200~300、300~400目和400目以上毛木耳粉组体重增加量比模型对照组显著性降低(p0.05或p0.01),同时,400目以上毛木耳粉组大鼠的脂重、脂体比和低密度脂蛋白均明显低于模型对照组(p0.05)。结论:100~200、200~300、300~400目和400目以上毛木耳粉有预防性减肥作用,其中300~400目和400目以上毛木耳粉的效果更显著。此外,400目以上毛木耳粉还有降脂功效。