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1.
目的观察黄瓜香等对糖尿病大鼠脂质代谢的影响,并进一步探讨其调脂机制。方法选取糖尿病大鼠灌胃给予黄瓜香提取液120mg/(kg.d),共8周,检测其空腹血脂变化,及其肠道菌群变化。结果(1)经黄瓜香提取物治疗后,治疗组较糖尿病组,甘油三脂、低密度脂蛋白和胆固醇明显降低(P〈0.01);(2)糖尿病组肠道菌群较正常组有明显变化(P〈0.01),尤其双歧杆菌、乳杆菌等明显减少,而治疗后肠道菌群得到调整。结论黄瓜香提取物可能通过扶植肠道菌群生长繁殖,对脂质代谢发挥作用,从而达到其调脂目的。  相似文献   

2.
目的:观察银杏叶提取物对糖尿病大鼠脂质代谢的影响,同时进一步探讨调脂机制.方法:选取糖尿病大鼠灌胃给予银杏叶提取物120 mg/(kg·d),共8周,检测其空腹血脂变化,及其肠道菌群变化.结果:(1)银杏叶提取物治疗后,治疗组较糖尿病对照组,总胆固醇、甘油三脂、低密度脂蛋白、胆固醇明显降低(P<0.01);(2)糖尿病组肠道菌群较正常组明显变化(P<0.01),尤其双歧杆菌、乳杆菌等明显减少,而治疗后肠道菌群得到调整.结论:银杏叶提取物可能通过扶植肠道菌群有益菌生长繁殖,对脂质代谢发挥作用,从而达到其调脂目的.  相似文献   

3.
目的 本研究拟对比两种不同高脂饮食方式诱导的高脂血症大鼠肠道菌群变化与短链脂肪酸代谢特征,以宿主-肠道菌群-代谢角度探讨高脂血症可能的微观机制。方法 SPF级SD大鼠分为:正常饮食组(CG组):饲喂大鼠维持饲料;高脂饮食组(HFD1组):每天足量饲喂高脂饲料;限饲高脂饮食组(HFD2组):每天限量饲喂高脂饲料80 g,不限量饲喂维持饲料。8周后检测血清总胆固醇(TC)、甘油三酯(TG)、低密度脂蛋白胆固醇(LDL-C)和高密度脂蛋白胆固醇(HDL-C)水平;苏木精-伊红(HE)染色观察大鼠肝组织和肾周脂肪病理学变化;取结肠内容物进行16S rDNA高通量测序,观察肠道菌群结构与功能的变化,并检测结肠内容物中短链脂肪酸的含量。结果 与CG组相比,HFD1组和HFD2组大鼠摄食量下降,体重升高;血清中TC、TG、LDL-C均显著升高;肝组织发生明显脂肪变性,肾周脂肪出现炎性病变;高脂干预后大鼠肠道菌群相对丰度显著变化,其中乳杆菌属相对丰度明显降低,菌群结构和功能变化明显,总短链脂肪酸、乙酸、丁酸、异丁酸下降显著。结论 两种高脂饮食方式均能引起大鼠高脂血症,且发病机制基本一致,均与脂质代谢以...  相似文献   

4.
目的研究糖尿病小鼠粪便中肠道菌群代谢产物与血糖之间的相关性,探讨肠道菌群与糖尿病之间的关系。方法采用高脂饮料喂养加腹腔注射链脲佐菌素(STZ)的方法建立糖尿病小鼠模型;将实验动物随机分为正常组、高脂组、糖尿病组及模型给药组,连续给药5周后,采血测血糖血脂,同步收集动物粪便,测粪便中短链脂肪酸(Short-chain fatty acids,SCFA)及D-乳酸。SCFA的检测使用气相色谱法,D-乳酸的检测使用紫外酶促法。结果糖尿病组小鼠粪便中乙酸、丙酸和正丁酸含量明显低于正常组及高脂组(P<0.01),D-乳酸含量明显高于正常组及高脂组(P<0.01);给药组乙酸、丙酸和正丁酸含量明显高于糖尿病组(P<0.01),D-乳酸含量明显低于糖尿病组(P<0.01)。给药组丙酸、正丁酸的含量与正常组间差异无统计学意义(P>0.05),但乙酸的含量仍低于正常组(P<0.01),D-乳酸的含量仍高于正常组(P<0.01)。结论糖尿病小鼠粪便中的肠道菌群代谢产物与血糖之间存在着密切的关系,代谢产物的差异性,提示肠道菌群的差异性,反映出糖尿病小鼠存在肠道菌群紊乱。  相似文献   

5.
【目的】本研究通过构建大鼠高脂结构模型来探究一株植物乳杆菌Lp3的益生作用。【方法】植物乳杆菌Lp3筛选自青藏高原地区传统发酵的牦牛酸奶,初步认定Lp3是一株具有良好耐受力的降胆固醇菌株,且体外益生特性突出,本研究通过建立高脂SD大鼠模型,在饲喂试验动物高脂饲料的同时灌胃植物乳杆菌Lp3,来确定该菌株对试验动物血脂的影响效果,并同时研究其对大鼠肠道菌群、粪便水分、粪便中胆固醇和胆汁酸含量的影响,以及对肝脏组织中的胆固醇(TC)和甘油三酯(TG)的影响。【结果】结果表明,植物乳杆菌Lp3对大鼠没有任何明显的毒副作用,对高脂模型大鼠具有良好的降血脂效果。饲喂高脂饲料并灌喂乳酸菌Lp3组大鼠(HL)的血清总胆固醇、甘油三酯和低密度脂蛋白胆固醇含量较饲喂高脂饲料组(HC)显著减少(P0.05),但是高密度脂蛋白胆固醇的含量变化并不明显。HC组大鼠与HL组及饲喂普通日粮组(对照组)大鼠相比较,HC组大鼠粪便中大肠杆菌数量明显增加,双歧杆菌、乳杆菌数量明显减少。但是灌胃乳酸菌的HL组大鼠的粪便中乳杆菌数略高于对照组,大肠杆菌和双歧杆菌数量和对照组大鼠的基本一致。表明植物乳杆菌Lp3具有维持肠道菌群平衡的作用。此外灌胃乳酸菌后HL组大鼠粪便含水量比HC组要高6.44%。HC组大鼠肝脏组织中胆固醇和甘油三酯要显著高于HL组(P0.05),说明Lp3可以减少脂类物质在肝脏组织中的沉积。从肝脏组织切片来看,也可以得出上述结论。【结论】结果表明本研究所筛选的植物乳杆菌Lp3对高脂大鼠具有值得深入研究的益生作用。  相似文献   

6.
目的研究泽泻对高脂高糖饮食大鼠的降血脂作用与肠道菌群多样性的相关性,并测定高脂高糖饮食大鼠肠道菌群丰度与多样性的变化。方法将32只健康雄性SD大鼠随机分成正常组(control group,CON)、高脂高糖模型组(high-fat and high-sucrose diet group,HFS)、高脂高糖饲料加二甲双胍干预组(metformin treatment group,MET)和高脂高糖饲料加泽泻醇提取物干预组(Alisma orientale extract group,AOE)。每组8只,造模4周后分别灌胃给予相应药物,连续4周。CON组和HFS组灌胃给予生理盐水。检测血清TC、TG、LDL-C及HDL-C水平及其他指标,提取肠道菌群总DNA,分析肠道微生物的变化。结果 HFS组的TC、LDL-C水平明显高于CON组(Ps0.05),给药4周后,AOE组TC、LDL-C水平均显著性降低(Ps0.05)。高通量测序结果显示,AOE组中与脂质代谢、多聚糖生物合成与代谢相关的肠道菌群多样性及丰度增加显著,肠道菌群的生态环境得以改善,形成了新的肠道菌群稳态。结论泽泻醇提取物可以有效降低高脂高糖饮食大鼠的血脂水平,对其肝脏具有保护作用。泽泻醇提取物也能通过改变肠道菌群的丰度、多样性和功能类群等靶标进行脂质代谢调节。  相似文献   

7.
目的:探讨饮用啤酒与运动对糖尿病(DM)大鼠血糖和血脂代谢的影响。方法:将造模成功的DM大鼠分成饮用啤酒组、运动组、饮用啤酒加运动组和单纯DM组(n=10),8周后进行相关指标的测定。结果:DM运动组血糖、甘油三酯(TC)、总胆固醇(TG)和低密度脂蛋白(LDL-C)含量显著低于DM组(P〈0.05),胰岛素、高密度脂蛋白(HDL-C)含量明显高于DM组(P〈0.05);DM饮啤酒组血糖含量非常显著高于DM组(P〈O.01),1℃和TG含量显著低于DM组(P〈0.05);DM饮啤酒加运动组TG含量非常显著低于DM组(P〈O.01),LDL-C含量显著低于DM组(P〈O.05),HDL-C含量非常显著高于DM组(P〈0.01)。结论:运动可有效降低DM大鼠血糖和血脂含量,增强胰岛素和HDL-C的合成;饮用啤酒可使DM大鼠血糖极显著升高,但可促进DM大鼠血脂的代谢;运动对降低饮用啤酒导致的DM大鼠血糖升高具有良好作用,并可显著升高HDL-C含量,降低TG和LDL-C含量。改善DM大鼠的血脂代谢。  相似文献   

8.
目的建立运动改善Ⅱ型糖尿病大鼠糖代谢模型,为Ⅱ型糖尿病运动处方的建立提供理论参考。方法 SPF级雄性8周龄Wistar大鼠45只,随机抽取32只在高糖高脂饲料喂养7周的基础上腹腔注射小剂量链脲佐菌素(STZ)缓冲液,建立Ⅱ型糖尿病大鼠模型。将正常大鼠和造模成功的大鼠分为4组:空白对照组(C组)、单纯运动组(CE组)、糖尿病对照组(DM组)、糖尿病运动组(DME组)。运动组采用改进的Ploug训练方案,60min/d,每周训练6 d,共训练8周。分别在高脂饲料喂养7周后尾静脉取血测定空腹血糖和血清胰岛素,造模后基线时间和运动8周末尾静脉取血测定空腹血糖(FBG),运动8周末眶后取血测定血清胰岛素(FINS),并计算胰岛素抵抗指数(HOMA-IR)。结果 (1)7周高糖高脂喂养后,与正常组相比,高脂组FBG、FINS和HOMA-IR含量显著升高。(2)8周运动干预后,DM组和DME组FINS水平显著低于C组和CE组,FBG和HOMA-IR显著高于C组和CE组;DME组FINS水平显著高于DM组,FBG和HOMA-IR显著低于DM组。DM组和DME组体重显著低于C组和CE组;DME组与DM组、CE组与C组组间体重差异无显著性。结论 (1)7周高糖高脂喂养联合一次性腹腔注射STZ(30 mg/kg)成功建立Ⅱ型糖尿病大鼠模型;(2)60 min/d共8周的游泳运动模式能够改善Ⅱ型糖尿病大鼠糖代谢,是研究运动锻炼预防和改善糖尿病机理的理想动物模型。  相似文献   

9.
目的探讨干预脂毒性改善糖尿病大鼠胰岛分泌功能及氧化应激损害的机制。方法将大鼠分为4组①正常组(NC),全程普通饲料喂养;②高脂组(HF),全程高脂饲料喂养。糖尿病组,高脂饲料喂养8周后腹腔注射低剂量STZ(30mg/kg),48h后行OGTT试验判断成模情况后分组。③糖尿病对照组(DM),不给予药物干预;④血脂干预组(SIM),灌胃辛伐他汀5mg/(kg.d)4周干预脂毒性。通过免疫组化染色观察胰岛B、A细胞形态学特点,RT-PCR测定胰腺内胰岛素原mRNA表达水平,DHE荧光染色检测胰岛中活性氧化产物ROS水平。结果与糖尿病对照组相比,干预脂毒性4周后血清胆固醇(TC)和甘油三酯(TG)水平分别下降了22.9%(P〈0.01)和57.0%(P〈0.05)。OGTT血糖水平均显著下降(P〈0.01)。胰岛中B细胞相对量是对照组的2.6倍(P〈0.01),B细胞胞质内胰岛素水平增加了26.5%(P〈0.05),胰岛素原mRNA表达升高18.3%(P〈0.01);A细胞相对量减少了50%(P〈0.01)。血清丙二醛(MDA)水平和胰腺中ROS表达显著下降。结论辛伐他汀干预脂毒性4周可以显著改善糖尿病大鼠胰岛分泌功能和氧化应激损害。  相似文献   

10.
目的高脂饮食加低剂量链脲霉素(Streptozotocin,STZ)建立小鼠2型糖尿病模型。方法5周的雄性C57BL/6J小鼠,随机分为正常饲料组、正常饲料加STZ组、高脂饲料组和高脂饲料加STZ组。相应饲料喂养5周后,按照100 mg/Kg的剂量腹腔注射STZ,然后继续喂养4周。在第5周和第9周末测定小鼠的体重、收缩压、血糖、血胰岛素、血甘油三脂和胆固醇水平。结果STZ注射前各组小鼠的体重、血压、血糖、血胰岛素、血脂和血甘油三脂无明显差异(P〉0.05)。STZ注射后4周时,高脂饲料加STZ组小鼠的体重、血糖、血胰岛素、血压和血脂水平明显升高(P〈0.05);而其他三组的这些指标无明显改变或仅部分升高。结论高脂饮食加低剂量链脲霉素可建立小鼠2型糖尿病模型,该模型具有人2型糖尿病的主要表型特征和相似的发病过程。  相似文献   

11.
We evaluated the protective effects of gallic acid (3,4,5-trihydroxybenzoic acid) on hepatic lipid peroxidation products, antioxidants, glycoprotein components, and lipids in streptozotocin-induced type II diabetic rats. To induce type II diabetes, rats were injected with streptozotocin intraperitoneally at a single dose of 40 mg/kg. Gallic acid (10 and 20 mg/kg) treatment was given to diabetic rats orally using an intragastric tube daily for 21 days. Streptozotocin-induced diabetic rats showed a significant increase in the levels of blood glucose, hepatic lipid peroxidation products, glycoprotein components, lipids, and the activity of HMG-CoA reductase and a significant decrease in the levels of plasma insulin and liver glycogen. In addition to this, the activities/levels of hepatic antioxidants were decreased in diabetic rats. Gallic acid (10 and 20 mg/kg) treatment showed significant protective effects on all the biochemical parameters studied in diabetic rats. Thus, our study shows the antihyperglycemic, antilipid peroxidative, antioxidant, and antilipidemic effects of gallic acid in streptozotocin-induced type II diabetic rats. A diet containing gallic acid may be beneficial to type II diabetic patients.  相似文献   

12.
The effect of clofibrate (CPIB) on lipid metabolism was studied in male rats rendered diabetic by intravenous injection of 80 mg/kg of streptozotocin. After 1 wk, the rats received by gastric intubation 242 mg/kg/day of CPIB for 7 days. Liver lipid concentration remained unchanged in experimental diabetes and after treatment with CPIB; however, due to decreased liver weight, total liver lipids were lower in diabetic rats. Elevation of cholesterol, phospholipids, and triglycerides in the serum of diabetic rats was reversed by CPIB treatment. Hepatic cholesterol synthesis in diabetic rats was suppressed to approximately 1/10 of that in normal rats. Treatment with CPIB abolished this residual cholesterogenic activity. Diabetes had no effect on intestinal cholesterol synthesis; a slight increase was noted after CPIB treatment. Basal and norepinephrine-induced lipolysis in fat pads was elevated in diabetic rats; CPIB had no effect on these changes. The data show that the elevated serum lipids in diabetic rats are lowered by treatment with C-IB. It was concluded that the hypocholesterolemic activity of clofibrate in rats is not caused by its suppression of hepatic cholesterol synthesis.  相似文献   

13.
目的探讨中药提取物水苏糖对肝硬化大鼠血浆内毒素及肠道菌群的影响.方法36只SD大鼠随机分为正常对照组(n=6),模型组,预防组,晚期治疗组.采用CCL4复合因素法建立肝硬化模型;实验第9周末处死所有大鼠,观察药物对肝硬化大鼠内毒素,肠道菌群,AST、ALT肝功能及肝组织病理学等的影响.结果中药提取物水苏糖对内毒素及其它指标都有明显的改善,预防组,晚期治疗组病理都有改善,预防组优于治疗组.结论中药提取物水苏糖能有效调整肝硬化肠道菌群失调,并降低血浆内毒素.对肝脏有保护作用.  相似文献   

14.
通过高糖高脂饲料联合小剂量链脲佐菌素和去卵巢手术制备2型糖尿病合并骨质疏松大鼠模型,探讨2型糖尿病合并骨质疏松大鼠肝组织胰岛素信号通路相关因子的表达及意义。结果表明:随着时间延长,2型糖尿病合并骨质疏松组(DOVX组)肝组织IGF-1、IRS-1较其他组mRNA及蛋白表达减少,单纯去卵巢组(NOVX组)IGF-1、IRS-1 mRNA及蛋白表达较假手术对照组(NS组)降低;糖尿病组(DS组)IRS-2较NS组mRNA及蛋白表达下降,但NOVX组与NS组IRS-2 mRNA及蛋白表达比较无明显差别。以上结果表明,2型糖尿病合并骨质疏松的发生可能与肝脏胰岛素信号通路受抑制有关。  相似文献   

15.
目的研究小檗碱对2型糖尿病中国地鼠肝脏葡萄糖激酶(GcK)、葡萄糖-6-磷酸酶(G6P)和磷酸烯醇式丙酮酸羧激酶(PEPCK)mRNA表达的影响,探讨小檗碱影响糖代谢的分子机制。方法以高脂高热量饲料喂养结合腹腔注射小剂量链脲佐菌素(STZ)的方法制作2型糖尿病中国地鼠模型,成模后随机分成模型组、小檗碱组、二甲双胍组,各药干预9周。同时设立对照组。观察小檗碱疗效及对肝脏GcK、G6P、PEPCK mRNA表达的影响。结果与模型组相比,小檗碱增强胰岛素敏感性,降低血糖血脂,增高肝脏GcK的mRNA表达,降低肝脏G6P、PEPCK mRNA的表达。结论小檗碱降低2型糖尿病血糖的作用机制可能与提高肝脏GcK mRNA的表达和降低G6P、PEPCK mRNA的表达有关。  相似文献   

16.
The Zn metabolism in experimental diabetic rats after maximal exercise was investigated. Forty male wistar rats were used, weighing 240±10 g at the beginning of this experiment. The animals were assigned to one of four experimental groups (n=10): control at rest (CR), control plus exercise (CE), diabetic at rest (DR), and diabetic plus exercise (DE). Experimental diabetes was produced by a single intraperitoneal injection of streptozotocin (STZ) (60 mg/kg). Thirty days after injection of streptozotocin, the animals of groups CE and DE were forced to acute exercise (swimming) until exhaustion. Glucose, rectal temperature (RT), pH, swimming time (ST), hematocrit (Hct), serum, and tissue (heart, liver, kidney, and muscle) Zn concentrations were measured. The streptozotocin treated animals used in the current experiment were diabetic. Increases in hepatic, renal muscle, and serum levels Zn at rest and after exercise until exhaustion were found in normal and diabetic rats. ST decreased (?180%) in the diabetic rat group. In conclusion, the results of the present study indicate that STZ-induced diabetes was associated with altered tissue Zn concentration, both at rest and after exercise.  相似文献   

17.
Diabetes mellitus (DM) is commonly associated with metabolic and cardiac dysfunctions. The aim of this study was to examine the effect of ghrelin on metabolic and cardiac dysfunctions in a type-2 diabetes mellitus (T2DM) rat model. For this, 48 male adult Sprague-Dawley rats were divided equally into 4 groups: Group I, fed normal chow, served as normal control group; Groups II-IV, were fed a high-fat diet for 2?weeks followed by injection of streptozotocin (STZ) (35?mg/kg body mass) to create a model of T2DM; Group II, were not treated; Group III, were treated with the vehicle (saline); Group IV, were treated with ghrelin (40?μg/kg body mass) twice daily for 10 days. The untreated diabetic rats showed a significant increase in serum fasting blood glucose, insulin homeostasis model assessment (HOMA) index, triglycerides (TGs), low-density lipoprotein cholesterol (LDL-C), total serum cholesterol (TC), and body mass, with a decrease in high-density lipoprotein cholesterol (HDL-C) (p?< 0.05). Hearts isolated from diabetic rats showed a significant increase in myocardial fat content, a significant decrease in GLUT4, and an increase in acyl-CoA oxidase enzyme mRNA (p?< 0.05). Ghrelin administration for 10?days caused a significant improvement in lipid profile, HOMA index, and body mass, and significantly corrected the myocardial mass, significantly reduced the fat content of the myocardium, significantly increased GLUT4, and decreased acyl CoA oxidase mRNA (p?< 0.05). Thus, ghrelin improves both the metabolic functions and the disturbed energy metabolism in the cardiac muscle of obese diabetic rats.  相似文献   

18.
The aim of this study was to examine the effect of caffeic acid phenethyl ester (CAPE) on lipid peroxidation (LPO) and the activities of antioxidant enzymes such as superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GSH-Px) in the liver of streptozotocin (STZ)-induced diabetic rats. Twenty-seven rats were randomly divided into three groups: group I, control non-diabetic rats (n = 9); group II, STZ-induced, untreated diabetic rats (n = 8); group III, STZ-induced, CAPE-treated diabetic rats (n = 10), which were intraperitoneally injected with CAPE (10 microM kg(-1) day(-1)) after 3 days followed by STZ treatment. The liver was excised after 8 weeks of CAPE treatment, the levels of malondialdehyde (MDA) and the activities of SOD, CAT, and GSH-Px in the hepatic tissues of all groups were analyzed. In the untreated diabetic rats, MDA markedly increased in the hepatic tissue compared with the control rats (p < 0.0001). However, MDA levels were reduced to the control level by CAPE. The activities of SOD, CAT, and GSH-Px in the untreated diabetic group were higher than that in the control group (p < 0.0001). The activities of SOD and GSH-Px in the CAPE-treated diabetic group were higher than that in the control group (respectively, p < 0.0001, p < 0.035). There were no significant differences in the activity of CAT between the rats of CAPE-treated diabetic and control groups. Rats in the CAPE-treated diabetic group had reduced activities of SOD and CAT in comparison with the rats of untreated diabetic group (p < 0.0001). There were no significant differences in the activity of GSH-Px between the rats of untreated diabetic and CAPE-treated groups. It is likely that STZ-induced diabetes caused liver damage. In addition, LPO may be one of the molecular mechanisms involved in STZ-induced diabetic damage. CAPE can reduce LPO caused by STZ-induced diabetes.  相似文献   

19.
Autoimmune hepatitis (AIH) is an immune-mediated type of chronic liver inflammation accompanied by intestinal flora imbalance. Probiotics have been reported to ameliorate imbalances in the intestinal flora. This study aimed to investigate the effects of compound probiotic in the AIH mouse model. AIH mice were gavaged with compound probiotic and injected intraperitoneally with dexamethasone (dex) for 42 days. The results showed that these treatments suppressed hepatic inflammatory cell infiltration, serum transaminase, and Th1 and Th17 cells. However, Treg cells were increased only in the probiotics group, which indicates an immunomodulatory role of the compound probiotic. The compound probiotic maintained intestinal barrier integrity, blocked lipopolysaccharide (LPS) translocation, and inhibited the activation of the TLR4/NF-κB pathway and the production of inflammatory factors in the liver and ileum. Moreover, the compound probiotic treatment increased the abundance of beneficial bacteria and reduced the abundance of potentially harmful bacteria in gut. Compound probiotic may improve ileal barrier function while increasing the diversity of the intestinal flora, blocking the translocation of gut-derived LPS to the liver and therefore preventing activation of the TLR4/NF-κB pathway. The resulting inhibition of pro-inflammatory factor production facilitates AIH remission.  相似文献   

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