动脉粥样硬化高脂饲料对小鼠糖脂水平的作用研究

目的 研究动脉粥样硬化高脂饲料对小鼠体重、血糖血脂水平及动脉粥样硬化斑块形成的作用,并且明确禁食时间对血脂检测结果的影响.方法 对10周龄雄性ApoE基因敲除(ApoE-/-)小鼠分别给予高脂饲料及普通饲料,4个月后观察动脉粥样硬化斑块情况;对10周龄雄性C57BL/6J小鼠分别给予普通饲料4周、普通饲料2周+高脂饲料...     

交泰丸对2型糖尿病大鼠糖脂代谢及肾脏保护作用的实验研究

目的:探讨交泰丸对于2型糖尿病大鼠(T2DM)糖脂代谢及肾脏保护作用。方法:采用尾静脉注射小剂量链脲佐菌素(STZ)同时喂养高脂饮食的方法建立大鼠T2DM模型,将大鼠随机分为模型组、交泰丸组、二甲双胍组、正常对照组,给予相应药物治疗8周,分别称取大鼠体质量以及肾湿重,检测空腹血糖(FPG)、空腹胰岛素(FINS)、血脂(TC、TG、HDL-C、LDLC、NEFA)、血肌酐(Cr)、尿素氮(BUN)、氧化应激相关指标(MDA、SOD、T-AOC)水平,肾脏组织TG含量,计算胰岛素抵抗指数(HOMA-IR),光镜下观察肾脏组织病理变化。结果:与正常组比较,模型组大鼠体质量、肾湿重、空腹血糖(FPG)、空腹胰岛素(FINS)、血脂(TC、TG、LDL-C、NEFA)、血肌酐(Cr)、尿素氮(BUN)、肾脏组织TG含量、MDA水平均升高,HDL-C、SOD、T-AOC水平下降,肾脏组织结构紊乱,可见脂肪沉积;与模型组比较,各治疗组体质量、肾湿重、FPG、FINS、HOMA-IR、血脂(TC、TG、LDL-C、NEFA)、肾脏组织TG含量降低,肾功能及氧化应激相关指标好转,肾脏组织病理学变化改善。结论:交泰丸能够有效改善2型糖尿病大鼠糖脂代谢,并对早期肾脏损害有保护作用,推测其机制可能与改善氧化应激有关。     

Comparative evaluation of the hypolipidemic effects of hydroxyethyl methylcellulose (HEMC) and hydroxypropyl methylcellulose (HPMC) in high fat-fed mice

The effect of hydroxyethyl methylcellulose (HEMC), in comparison with hydroxypropyl methylcellulose (HPMC), on the body weight and lipid metabolism in mice fed with high fat diet was investigated. The animals were given normal control diet (NC group), high fat diet (HF group), or high fat diet supplemented with either HEMC (HF+HEMC group) or HPMC (HF+HPMC group) for 6weeks. At the end of the experimental period, both HF+HEMC and HF+HPMC groups showed reduced body weight, body fat, plasma triglyceride and total cholesterol contents, atherogenic index and free fatty acid level, and increased HDL-cholesterol concentration relative to the HF group. The hypolipidemic effect was partly due to the inhibition of lipogenesis and regulation of adipokine production. These findings demonstrate that compared with HPMC, HEMC was similarly effective in improving the lipid metabolism under high fat diet condition and may be useful in the prevention and treatment of high fat diet-induced hyperlipidemia.     

Implitapide, a microsomal triglyceride transfer protein inhibitor, reduces progression of atherosclerosis in apolipoprotein E knockout mice fed a Western-type diet: involvement of the inhibition of postprandial triglyceride elevation

Microsomal triglyceride transfer protein (MTP) is essential for the synthesis of both chylomicron in the intestine and very low-density lipoprotein in the liver. An MTP inhibitor, (2S)-2-cyclopentyl-2-[4-[(2,4-dimethyl-9H-pyrido[2,3-b]indol-9-yl)methyl]phenyl]-N-[(1S)-2-hydroxy-1-phenylethyl]ethanamide (implitapide), has been shown to suppress atherosclerosis in apolipoprotein E knockout (apoE KO) mice. To elucidate the antiatherosclerotic mechanisms of implitapide in the mice, we examined the effects on plasma lipid levels, triglyceride (TG) elevation after oral fat loading, and development of atherosclerosis in apoE KO mice fed a Western-type diet. Implitapide at a dosage of approximately 3.2 mg/kg/day significantly reduced both total cholesterol and TG levels during the 8-week treatment period. In addition, implitapide significantly inhibited the increase in plasma TG levels after oral olive oil loading tests conducted after 4 weeks of treatment. After the treatment, implitapide significantly suppressed the atherosclerotic lesion area by 83% compared with a control group. These results provide direct evidence that the antiatherosclerotic effects of implitapide in apoE KO mice are associated with the inhibition of postprandial TG elevation, in addition to the reduction of both plasma total cholesterol and TG levels.     

甘草酸对动脉粥样硬化斑块的消退作用

目的:探讨甘草酸对高脂血症模型鼠,载脂蛋白E基因敲除(apoE^-/-)小鼠,血管壁动脉粥样硬化(As)斑块的消退作用及可能机制。方法:9周龄的雄性apoE^-/-小鼠16只,经高脂饮食加重高脂血症,8周后更换为普食,随机分组,甘草酸组采用160 mg·kg^-1·d^-1的剂量灌胃,对照组给予同等生理盐水灌胃,6周后小鼠安乐死,采取眼球后静脉血测量血浆总胆固醇(TC)、三酰甘油(TG)水平,酶联免疫吸附法(ELISA)检测血中单核细胞趋化因子(MCP-1)的水平,取小鼠胸腹主动脉分析血管内壁As斑块面积,主动脉窦部组织冰冻切片进行油红O染色分析斑块面积;利用原代培养的小鼠腹腔巨噬细胞检测甘草酸对炎症因子及脂代谢相关因子mRNA表达的调控作用。结果:高脂饮食明显加重小鼠血脂紊乱,改为普食后,对照组血脂水平仍高于基础值,而甘草酸组则明显降低了血清TC、TG水平及血MCP-1水平,甘草酸组小鼠主动脉窦As斑块的面积比对照组下降23%,主动脉血管内壁斑块减少约40%,同时细胞实验表明甘草酸能显著降低脂多糖(LPS)刺激下巨噬细胞IL-6的水平,并可诱导细胞膜上ATP结合盒转运体A1(ABCA1)的表达升高。结论:甘草酸可通过改善小鼠血脂水平,降低炎症反应,而表现出较强的消退早期As斑块的作用。     

大黄酸固体分散体的制备及对大鼠血脂的影响

目的以聚乙烯吡咯烷酮为载体制备大黄酸固体分散体,考察其对大鼠血脂及抗氧化能力的影响。方法差示扫描量热法和红外光谱法对固体分散体进行分析。利用高脂饲料及脂肪乳剂建立SD大鼠高脂血症动物模型,大鼠分别灌胃给予大黄酸及大黄酸固体分散体,连续给药8周后测定总胆固醇(TC)、甘油三酯(TG)、高密度脂蛋白胆固醇(HDL-C)、低密度脂蛋白胆固醇(LDL-C)和丙二醛(MDA)含量,测定超氧化物岐化酶(SOD)和谷胱甘肽过氧化物酶(GSH-Px)的活力。结果大黄酸固体分散体能显著降低高脂血症大鼠血清中TC、TG、LDL-C含量(P<0.05);升高血清中HDL-C含量(P<0.05);提高SOD和GSH-Px活力;降低MDA含量(P<0.05)。结论以聚乙烯吡咯烷酮为载体制备的大黄酸固体分散体对高脂血症大鼠有降血脂及抗氧化作用。     

四氢普伐他汀钠对高血脂模型新西兰兔脂质代谢的影响

目的通过高脂饮食兔高血脂模型考察四氢普伐他汀钠(H4PV-Na)的降血脂和调节脂质代谢的作用。方法新西兰白兔,雄性,100只,适应性饲养2周后,随机分为空白对照组、高脂模型组、阳性对照组P(普伐他汀钠组2.5mg·kg~(-1))、阳性对照组A(阿托伐他汀钙组2.5mg·kg~(-1))和给药组(低剂量1.25mg·kg~(-1)、中剂量2.5mg·kg~(-1)、高剂量5mg·kg~(-1))。高脂饲料喂饲2周形成高脂模型后,阳性药物和供试药物强制经口灌胃给药,10mL·kg~(-1),每天上午给药1次,每周给药6d,连续10周。最后1次给药后24h,禁食过夜,取血和肝脏组织,进行血脂和肝脂相关指标检测:血清总胆固醇(TC)、三酰甘油(TG)、低密度脂蛋白胆固醇(LDL-C)、高密度脂蛋白胆固醇(HDL-C)、全血超氧化物歧化酶(SOD)活力和血清丙二醛(MDA)含量。横纹肌溶解毒性检测指标:测定血清磷酸肌酸激酶(CK)含量。取心脏、肝脏、脾脏、肺脏、肾脏、肾上腺等器官经HE染色检测脂肪组织的病理学变化。结果新西兰兔用高脂饲料喂养10周后,TC,TG和LDL-C水平升高,HDL-C水平降低,给予H4PV-Na后,TC、TG和LDL-C水平降低,HDL-C水平升高。结论 H4PV-Na具有明确的降血脂和胆固醇作用,在肝脏组织中降低胆固醇能力高于在血液中,无横纹肌溶解毒性,但在同等剂量下,H4PV-Na降脂效果稍弱于普伐他汀钠和阿托伐他汀钙。     

岩黄连总碱对代谢相关脂肪性肝病小鼠的治疗作用及分子机制研究

目的 研究岩黄连总碱对高糖高脂饮食诱导的代谢相关脂肪性肝病（MAFLD）小鼠的治疗作用。方法 随机取C57BL/6小鼠7只设置为对照组,喂以正常饲料;造模小鼠给予高脂饮食和高糖饮水（含20%果糖水）,连续喂养10周;将造模小鼠按体质量随机分为模型组、盐酸二甲双胍（阳性药,200 mg/kg）组和岩黄连总碱低、高剂量（25、100 mg/kg）组,继续饲以高脂高糖饮食,连续ig给药5周。记录小鼠体质量,取肝脏并拍照,测定小鼠肝脏质量,计算肝脏指数;应用血糖仪测定小鼠空腹血糖（FBG）及口服糖耐量（OGTT）;试剂盒法测定血清总胆固醇（TC）、三酰甘油（TG）、低密度脂蛋白胆固醇（LDL-C）、高密度脂蛋白胆固醇（HDL-C）及游离脂肪酸（NEFA）的水平;取肝组织进行HE染色、油红O染色和Masson染色;Western blotting检测肝组织中AMP依赖的蛋白激酶（AMPK）、p-AMPK、磷脂酰肌醇3-激酶（PI3K）、p-PI3K、蛋白激酶B （Akt）、p-Akt蛋白表达情况。结果 与对照组比较,模型组小鼠体质量、肝脏指数显著升高;给药后小鼠体质量及肝脏指数显著下降（P<0.05、0.01）。与模型组比较,岩黄连总碱显著降低小鼠的FBG及OGTT水平（P<0.01）;显著降低血清TC、TG、LDL-C及NEFA水平（P<0.01）;显著改善小鼠肝组织脂肪变及纤维化;显著上调MAFLD小鼠肝组织p-AMPK、p-PI3K、p-Akt蛋白水平（P<0.01）。结论 岩黄连总碱对MAFLD发挥显著治疗作用,其作用机制可能与通过激活AMPK/PI3K/Akt信号通路,减轻肝脏脂质沉积有关。     

In vitro screening for antihyperlipidemic activities in foodstuffs by evaluating lipoprotein profiles secreted from human hepatoma cells

We screened the antihyperlipidemic effects of seven edible plants by evaluation of the triglyceride (TG) and cholesterol profiles secreted from HepG2 cells. We found that the water- and ethanol-extracts of Brasenia schreberi at 100 μg/ml exhibited strong inhibitory activities against TG and cholesterol secretions from HepG2 cells stimulated with sodium oleate. Real-time RT-PCR analysis demonstrated that ethanol extract of B. schreberi (BSET) attenuated the expression of the sterol regulatory element binding protein-1c and -2, fatty acid synthase and HMG CoA synthase-1 genes, which are involved in lipid synthesis in hepatocyte/hepatoma cells. Furthermore, we studied the action of BSET on adipose tissue accumulation and serum parameters in mice fed a high-fat diet (HFD). BSET suppressed mesenteric and epididymal adipose tissue accumulation and normalized serum TG and glucose, but not cholesterol levels in HFD-fed mice.     

益气养阴活血法改善2型糖尿病病人脂质代谢紊乱的临床观察

目的 观察益气养阴活血中药对2型糖尿病合并脂质代谢紊乱病人血糖、血脂水平的影响.方法 将48例2型糖尿病合并脂质代谢紊乱的病人随机数字表法为对照组和治疗组,两组病人在饮食、运动等生活方式干预的基础上,对照组继续使用西药降糖治疗;治疗组在西药基础上加用益气养阴活血中药丹蛭降糖胶囊.观察治疗前后血糖、糖化血红蛋白、血脂总胆固醇(TC)、三酰甘油(TG)、高密度脂蛋白胆固醇(HDL-C)、低密度脂蛋白胆固醇(LDL-C)等指标的变化.结果 与对照组比较,给予丹蛭降糖胶囊干预后治疗组病人血糖、糖化血红蛋白、TC、TG、LDL-C水平显著降低(P<0.05),HDL-C 水平显著升高(P<0.05).结论 益气养阴活血中药可能通过改善脂肪细胞的分化功能,降低血清脂质,减小脂肪细胞体积,增强脂肪细胞的贮脂能力,临床能获得较好的疗效.     

非酒精性脂肪肝患者血脂、血糖与肝功能的检验结果分析

目的分析非酒精性脂肪肝患者血脂、血糖与肝功能的血生化水平的关联,以期指导临床。方法选取同期入院检查的非酒精性脂肪肝患者（研究组）及健康者（对照组）各78例,对其进行血生化检验,检验指标为三酰甘油（TG）、总胆固醇（TC）、空腹血糖（Glu）、高密度脂蛋白胆固醇（HDL—C）、低密度脂蛋白胆固醇（LDL—C）、谷酰转肽酶（GGT）、丙氨酸氨基转移酶（ALT）、天冬氨酸氨基转移酶（AST）。检测完成后对比两组指标的水平。结果研究组的TG、TC、G1u及LDL—C水平显著高于对照组（P〈0．05）,HDL—C显著低于对照组（P〈0．01）。研究组的GGT、ALT及AST水平显著高于对照组,差异有统计学意义（P〈0．05）。结论非酒精性脂肪肝患者其肝功能显著受损．进而使其血糖及血脂代谢发生紊乱,应结合临床予以进一步处置。     

Effects of conjugated linoleic acid supplementation on blood lipids and adiposity of rats fed diets rich in saturated versus unsaturated fat

Conjugated linoleic acid (CLA) may decrease adiposity and improve blood lipid profiles under some conditions. The goal of this study was to determine the effects of CLA supplementation on blood lipid profiles and adiposity of rats fed a diet containing a primarily saturated fat versus a diet containing a primarily unsaturated fat. Twenty-eight male Sprague-Dawley rats were randomly assigned to one of four diets containing coconut oil, coconut oil with CLA, corn oil or corn oil with CLA. After 28 days, blood was collected and serum concentrations of total cholesterol (TC), HDL-cholesterol (HDL-C), and triacylglycerols (TG) were assessed. Food intake, body weights, and epididymal fat pads were measured. No significant differences (p>0.05) were noted among groups for amount of food consumed, weight gained, food efficiency ratio or serum TG concentrations. TC concentrations were lower (p<0.05) in the CLA-supplemented rats that were fed coconut oil but not those consuming corn oil. Serum HDL-C was lower (p<0.05) in rats consuming corn oil but was not significantly different (p>0.05) for CLA supplemented groups. Epididymal fat pads weighed significantly more (p<0.05) in the coconut oil fed group compared to the corn oil fed group, but there was no significant difference (p>0.05) between the corn oil and coconut oil + CLA group. Overall, this study suggests that CLA is more beneficial for control of blood lipids and adiposity when supplemented to a diet rich in saturated versus unsaturated fat.     

生命早期使用头孢曲松对小鼠后期糖脂代谢的影响及两歧双歧杆菌TMC3115的改善效果研究

目的 探究生命早期使用头孢曲松和两歧双歧杆菌TMC3115(TMC3115)对小鼠后期糖脂代谢的影响以及TMC3115可能的改善作用。方法 36只2周龄雌性BALB/c小鼠随机分为空白组、抗生素组和实验组(n=12),分别以生理盐水、头孢曲松(100mg/kg)、头孢曲松(100mg/kg)+TMC3115(含菌量为109CFU/d)持续灌胃至4周龄后停止灌胃,继续喂养至16周龄。最后一周测定空腹血糖并进行口服糖耐量实验,实验结束后测定血清和肝脏的甘油三酯(TG)、总胆固醇(TC)、血清空腹胰岛素水平,并计算内脏脂体比和胰岛素抵抗指数。结果 各组间体重、血糖、糖耐量、血脂和胰岛素的结果无统计学差异(P＞0.05);与空白组相比,抗生素组的卵巢脂体比、肠系膜脂体比和总脂体比分别上升45.5%、35.8%和39.1%(P＜0.05),而实验组与抗生素组相比无统计学差异;抗生素组的肝脏TG和TC水平与空白组相比分别升高44.4%和6.5%,而实验组的肝脏TG与抗生素组相比降低28.4%(P＜0.05)。结论 生命早期头孢曲松干预可引起小鼠后期脂体比和肝脏甘油三酯增加,而TMC3115可能有一定的改善作用。     

脂肝乐抗大鼠脂肪肝脂质过氧化的研究

目的:研究脂肝乐(ZGL)对高脂高胆固醇饲料所致大鼠脂肪肝的治疗作用及其作用机制。方法:Wistar大鼠随机分为6组,即正常对照、模型、东宝肝泰及ZGL低、中、高剂量组。除正常对照组外,其余各组均给予高脂高胆固醇饲料,连续12周。第13周开始各给药组分别灌胃给药(ZGL1.5、3.0、4.5g.kg-1;东宝肝泰0.3g.kg-1),每天1次,持续12周,测定大鼠血液生化指标并观察其病理学变化。结果:ZGL能显著降低血清总胆固醇、三酰甘油和肝脏丙二醛含量(P<0.01或P<0.05);升高肝脏谷胱甘肽、金属硫蛋白、细胞色素P450含量(P<0.01或P<0.05);ZGL低、中剂量组可升高肿瘤坏死因子含量(P<0.01或P<0.05);病理学变化可得到显著改善。结论:ZGL有显著抗脂质过氧化、促进脂质从肝脏排除、减少脂质在肝内蓄积的作用,因而具有显著抗脂肪肝作用。     

人参皂苷Compound K通过AMPK及SREBP1途径改善非酒精性脂肪肝的机制研究

目的：研究人参皂苷Compound K（CK）对非酒精性脂肪肝的改善作用及其与腺苷酸激活蛋白激酶（AMPK）及固醇调节元件结合蛋白（SREBP1）信号转导通路的关系。方法：采用高脂饲料喂养C57BL/6J雄性小鼠9周,建立非酒精性脂肪肝动物模型;9周后随机分为5组,正常饲料组（RD）,高脂饲料组（HFD）,给药组（HFD+CK 3,9,27 mg·kg^-1）,每天灌胃给药1次,每周测2次体质量,连续11周。实验结束后,分别称量小鼠体质量和肝质量;检测三酰甘油（TG）、胆固醇（cholesterol）、非游离脂肪酸（NEFA）、谷草转氨酶（AST）和谷丙转氨酶（ALT）水平。苏木素-伊红（HE）染色观察肝脏病理变化,Western blot法检测AMPK和乙酰辅酶A羧化酶（ACC）的磷酸化表达,PCR法检测脂肪合成转录因子SREBP1及其靶基因（FAS、SCD1）的基因表达。结果：治疗11周后,与RD组比较, HFD组小鼠肝质量及肝质量与体质量的比值显著增加（P<0.001,P<0.05）,HE染色显示HFD组较RD组肝细胞明显增大且伴有大泡性脂肪变,说明高脂饲料诱导非酒精性脂肪肝模型的建立。与HFD组比较,给药组小鼠体质量、肝质量显著降低（P<0.05）,血脂（TG、CHO、NEFA）和肝功（sAST和sALT）指标也显著降低（P<0.05,P<0.01,P<0.001）;HE染色也说明给药组能够明显改善肝脏病理状态,从而改善肝细胞脂肪变性;Western blot结果显示HFD组较RD组,AMPK和ACC磷酸化均被抑制,给药组较HFD组,AMPK和ACC均被磷酸化,且随药物浓度的增加,磷酸化越明显;PCR法结果显示HFD较RD组,脂肪合成转录因子SREBP1及其靶基因表达显著增强,而在给药组上述基因表达均显著被抑制。结论：CK对非酒精性脂肪肝具有改善作用,其机制之一可能是通过激活AMPK和ACC的磷酸化、抑制脂肪合成转录因子SREBP1及其靶基因的表达来实现的。     

中药红曲对高脂饮食大鼠血脂的影响作用

目的探讨不同剂量红曲对高脂饮食大鼠血脂水平的影响。方法雄性SD大鼠造高脂血症模型2周后,将造模成功的大鼠随机分为0．5、1．0、2．0g／kg体重3组,同时设置模型对照组、空白对照组（5组,共50只）,干预28d。干预组每日相应浓度的红曲灌胃,模型对照组和空白对照组等剂量的生理盐水灌胃。实验末期,眼内眦采血（不禁食）,测血清总胆固醇（TC）、三酰甘油（TG）、高密度脂蛋白胆固醇（HDL—C）、低密度脂蛋白胆固醇（LDL—C）。结果实验干预前,高脂喂养模型组与正常对照组相比,TC、TG、LDL均有升高,差异有统计学意义（P〈0．05）;干预结束后2．0g／ks体重剂量组可降低血清中TC（P〈0．05）,而0．5g／kg体重和1．0g／kg体重剂量组对血清中TC的影响差异无统计学意义（P〉0．05）。结论红曲可以降低高脂饮食大鼠的TC水平。     

高脂饲料诱发非酒精性脂肪肝实验研究

目的探讨正常饮食和高脂肪饮食对小鼠体重、血糖、葡萄糖耐受、血脂、脂肪肝的影响。方法雄性C57BL/6小鼠随机分为MD10%和MD45%脂肪含量饲料组,喂养3个月,检测动物体重、血糖、葡萄糖耐受、血脂,以及主要脏器重量及肝脏脂质含量。结果与正常组（MD10%脂肪含量）相比,高脂组（MD45%脂肪含量）动物体重显著增加,出现明显的糖耐量异常和血脂水平升高,同时伴有肝脏脂质含量增加。结论高脂饮食对非酒精性脂肪肝有较强的诱导作用。     

Rosuvastatin reduces plasma lipids by inhibiting VLDL production and enhancing hepatobiliary lipid excretion in ApoE*3-leiden mice

The present study was designed to investigate the lipid-lowering properties and mechanisms of action of a new HMG-CoA reductase inhibitor, rosuvastatin, in female ApoE*3-Leiden transgenic mice. Mice received a high fat/cholesterol (HFC) diet containing either rosuvastatin (0 [control], 0.00125%, 0.0025%, or 0.005% [w/w]) or 0.05% (w/w) lovastatin. The highest dose of rosuvastatin reduced plasma cholesterol and triglyceride levels by 39% and 42%, respectively, compared with the HFC control. Lovastatin had no effect on plasma cholesterol and triglyceride levels. In ApoE*3-Leiden mice on a chow diet, rosuvastatin (0.005% [w/w]) decreased plasma cholesterol levels by 35% without having an effect on triglyceride levels. On a chow diet, expression of genes involved in cholesterol biosynthesis and uptake in the liver was increased by rosuvastatin. Further mechanistic studies in HFC-fed mice showed that rosuvastatin treatment resulted in decreased hepatic VLDL-triglyceride and VLDL-apolipoprotein B production. VLDL lipid composition remained unchanged, indicating a reduction in the number of VLDL particles secreted. Lipolytic activity and expression of genes involved in cholesterol and triglyceride synthesis and beta-oxidation of fatty acids in the liver were not affected by rosuvastatin treatment, and hepatic lipid content did not change. However, activity of hepatic diacylglycerol acyltransferase was significantly decreased by 25% after rosuvastatin treatment. Moreover, biliary excretion of cholesterol, phospholipids, and bile acids was increased during treatment. The results indicate that rosuvastatin treatment in ApoE*3-Leiden mice on a HFC diet leads to redistribution of cholesterol and triglycerides in the body, both by reduced hepatic VLDL production and triglyceride synthesis and by enhanced hepatobiliary removal of cholesterol, bile acids, and phospholipids, resulting in substantial reductions in plasma cholesterol and triglyceride levels.     

Antihyperlipidemic effects of different molecular weight sulfated polysaccharides from Ulva pertusa (Chlorophyta).

Ulvan, a sulfated polysaccharide from Ulva pertusa, was degraded to yield two low molecular weight fractions U1 and U2. The molecular weights of ulvan and its fractions were determined and varied from 151.6 to 28.2 kDa. They were fed to rats on a hypercholesterolemic diet for 21 days to evaluate and compare the antihyperlipidemic actions. Ulvan-based diet significantly lowered the levels of serum total cholesterol (-45.2%, P<0.05) and low density lipoprotein cholesterol (LDL-cholesterol, -54.1%, P<0.05). While U1- and U2-based diets significantly elevated the levels of serum high density lipoprotein cholesterol (HDL-cholesterol, +22.0% for U1, not significant; +61.0% for U2; P<0.05) and reduced triglyceride (TG, -82.4% for U1, -77.7% for U2; P<0.05) in rats as compared to control diet. In addition, consumptions of various ulvans significantly increased fecal bile acid excrement. The results indicated that ulvans with different molecular weights exhibited diverse effects on lipid metabolism. The high molecular weight ulvan was effective in serum total and LDL-cholesterol, whereas low molecular weight fractions were in TG and HDL-cholesterol. The fractions were considered to be more beneficial to hyperlipidemia associated with diabetes over ulvan.     

314例2型糖尿病患者血脂及用药情况分析

目的了解糖尿病人血脂控制及用药情况。方法对314例2型糖尿病(T2DM)患者三酰甘油(TG)、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)、糖化血红蛋白(HbA1c)及用药情况进行回顾性分析。结果血脂指标中三酰甘油与T2DM相关性最强;T2DM病人血脂控制情况不理想。结论高三酰甘油与胰岛素抵抗互为相关,临床对高三酰甘油血症引起的危害重视度远远不够,必须依照相关指南对高三酰甘油血症进行规范化治疗。