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研究了灌胃中链甘油三酯(MCT)不同时程对小鼠抗疲劳作用的影响,并探讨MCT抗疲劳作用的最短有效时间。选取健康雄性昆明小鼠120只,随机分成6组:安静对照组(CC_1和CC_2)、游泳对照组(SC_1和SC_2)、3 h组(TH1和TH2)、3 d组(TD_1和TD_2)、5 d组(FD_1和FD_2)、7 d组(SD_1和SD_2),每组20只。每组再随机分成两个小组,每小组10只。1小组小鼠在灌胃相应时程后用于无负重游泳60 min实验,测定无负重游泳60 min后的各生化指标; 2小组小鼠在灌胃相应时程后用于负重游泳力竭实验,测定负重游泳力竭时间。结果表明:急性灌胃MCT和短期灌胃MCT均可以显著延长小鼠负重游泳力竭时间,在一定程度上降低BUN含量,增加肝脏GSH含量,且随着灌胃时程的延长,MCT维持血糖和肝糖原含量稳定、降低血清乳酸含量、提高肝脏游离脂肪酸含量的效果越明显。综上所述,急性灌胃MCT和短期灌胃MCT均可以提高小鼠运动耐力及抗疲劳,且短期灌胃MCT 7 d抗疲劳效果较好。 相似文献
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采用喷雾干燥技术制备中链甘油三酯微胶囊,将中链甘油三酯固态化,方便食品添加和储运;以人工胃液模拟体外释放,初步研究了中链甘油三酯微胶囊的缓释特性;并以基础合成饲料、长链甘油三酯微胶囊高脂饲料(长链甘油三酯供能占总能量30%左右)和中链甘油三酯微胶囊高脂饲料(中链甘油三酯供能占总能量30%左右)分别饲喂小鼠,并观察5周内小鼠健康状况和体质量、血清甘油三酯(TG)、总胆固醇(TC)、高密度脂蛋白胆固醇(HDL-C)含量、低密度脂蛋白胆固醇(LDL-C)含量、饲料消耗量的变化,研究中链甘油三酯对小鼠脂质代谢的影响。结果表明,中链甘油三酯微胶囊在人工胃液中可缓慢释放6h,能够缓解中链甘油三酯一次性摄入量超标引起的腹痛腹泻问题,膳食中添加中链甘油三酯微胶囊后,能降低体内TC和LDL-C的含量,中链甘油三酯微胶囊的高脂膳食具有预防肥胖、减少体质量增长和体脂累积、减轻肝脏脂肪沉积的作用,且其抑制体质量增长的机制与减少能量摄入量无关。 相似文献
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响应面分析法优化中链甘油三酯微胶囊的制备 总被引:1,自引:1,他引:0
为优化以麦芽糊精为壁材制备中链甘油三酯微胶囊的工艺条件,在单因素试验的基础上,选取芯材与壁材质量比、乳化剂用量、乳状液固形物质量分数为自变量,微胶囊化效率为响应值,根据Box-Benhnken中心组合试验设计原理采用三因素三水平的响应面试验,依据回归分析确定最佳制备条件.结果表明,中链甘油三酯微胶囊最佳制备条件为:芯材与壁材质量比3.56:6.44,乳化剂用量3.59%,乳状液固形物质量分数27.6%.在此条件下微胶囊化效率预测值为96.58%,验证值为96.53%. 相似文献
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近些年来,作为一种新型的功能性油脂,中链脂肪酸甘油三酯(MCT)的理化、保健特性愈发受到关注。目前国内食用油脂几大厂家不约而同地将MCT作为研发重点和热点。详细介绍了MCT的总体研究进展、专利技术发展态势、重点申请人和重点专利技术,以期为国内食用油脂行业与油脂企业提供一份详实的MCT专利技术发展态势报告。 相似文献
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为了研究中链甘油三酯(MCT)对延缓阿尔茨海默病(AD)发生的有效性,分析了MCT在体内的代谢过程,综述了MCT对AD的作用机制,介绍了MCT食品针对AD的应用状况。MCT可能通过抗氧化作用、抗炎作用、减少脑淀粉样蛋白-β沉积、保护线粒体功能以及改善脑能量代谢等方面延缓AD的发生。目前已有基于MCT的食品用于缓解AD患者的病情,如Axona?(由MCT组成)、Ketonformula?(基于MCT配方的奶粉)等。MCT对AD有一定的改善作用,在日常饮食中合理运用MCT可以延缓AD发生。 相似文献
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旨在阐明中链甘油三酯产品中的主要副产物甘油二酯类杂质的化学成分,以中链甘油三酯为原料,通过硅胶柱层析和半制备高效液相色谱法分离其中的甘油二酯,并通过核磁谱、质谱、红外光谱、紫外光谱和气相色谱对甘油二酯的结构进行鉴定。结果表明:从中链甘油三酯中分离出6种甘油二酯(DG-1~DG-6),结构依次被鉴定为1,3-二辛酸甘油二酯、1,2-二辛酸甘油二酯、1,3-辛酸癸酸甘油二酯、1,2-辛酸癸酸甘油二酯、1,3-二癸酸甘油二酯、1,2-二癸酸甘油二酯。了解中链甘油三酯中甘油二酯的结构有助于中链甘油三酯的质量控制和临床应用。 相似文献
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Igho Onakpoya Katherine Hunt Barbara Wider Edzard Ernst 《Critical reviews in food science and nutrition》2014,54(1):17-23
Background : Several slimming aids being sold as food supplements are widely available. One of them is pyruvate. Its efficacy in causing weight reduction in humans has not been fully established. The objective of this systematic review was to examine the efficacy of pyruvate in reducing body weight. Methods: Electronic and nonelectronic searches were conducted to identify all relevant human randomized clinical trials. The bibliographies of all located articles were also searched. No restrictions in language or time were applied. Two independent reviewers extracted the data according to predefined criteria. A fixed-effect model was used to calculate mean differences (MD) and 95% confidence interval (CI). Results: Nine trials were identified and 6 were included. All had methodological weaknesses. The meta-analysis revealed a statistically significant difference in body weight with pyruvate compared to placebo (MD: ?0.72 kg; 95% CI: ?1.24 to ?0.20). The magnitude of the effect is small, and its clinical relevance is uncertain. Adverse events included gas, bloating, diarrhea, and increase in low-density lipoprotein (LDL) cholesterol. Conclusion: The evidence from randomized clinical trials does not convincingly show that pyruvate is efficacious in reducing body weight. Limited evidence exists about the safety of pyruvate. Future trials involving the use of this supplement should be more rigorous and better reported. 相似文献
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中链甘油三酯在动物体内的代谢及应用研究 总被引:3,自引:0,他引:3
中链甘油三酯(MCT)是由6~12个碳原子的脂肪酸组成的甘油三酯,它们在体内具有消化、吸收、转运、代谢快的特点.MCT能迅速提供能量,但同时也产生大量的酮体,进入血液,使血液中酮体水平升高.MCT用于仔猪的饲养效果不一致,但用于母猪和鸡的饲养中有明显的正效果.如何消除MCT在肝细胞内氧化产生的大量酮体带来的不利影响,以及寻找一种简便的饲喂方法,都有待今后进一步的研究. 相似文献
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Manije Darooghegi Mofrad Hadis Mozaffari Seyed Mohammad Mousavi Ali Sheikhi 《Critical reviews in food science and nutrition》2020,60(5):859-872
AbstractBackground: Previous studies reported inconsistent findings regarding the effects of psyllium supplementation on obesity measures. This systematic review and meta-analysis was performed to summarize data from available randomized clinical trials (RCTs) on the effect of psyllium supplementation on body weight, body mass index (BMI), and waist circumference (WC) in adults.Methods: PubMed, SCOPUS, Cochrane Library, and Google Scholar were searched to identify relevant articles up to August 2018. The effect sizes were presented as weighted mean difference (WMD) and 95% confidence intervals (CI) by using random effects model. To detect dose-response relationships, we used fractional polynomial modeling.Results: A total of 22 RCTs were included. Meta-analysis did not find any significant effect of psyllium supplementation on body weight (MD: ?0.28?kg, 95% CI: ?0.78, 0.21, p?=?0.268), BMI (MD: ?0.19?kg/m2, 95% CI: ?0.55, 0.15, p?=?0.27) and WC (MD: ?1.2?cm, 95% CI: ?2.6, 0.2, p?=?0.09). Subgroup analysis showed that psyllium dosage, kind of psyllium administration, duration of trial, study design, sample size, and gender were potential sources of heterogeneity. Moreover, there was nonlinear association between duration of psyllium consumption, BMI and WC.Conclusion: Psyllium supplementation does not reduce body weight, BMI, and WC significantly. 相似文献
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Igho Onakpoya Jack O'Sullivan Carl Heneghan Matthew Thompson 《Critical reviews in food science and nutrition》2017,57(3):602-612
The aim of this systematic review was to evaluate the evidence for or against the effectiveness of grapefruits (Citrus paradisi) on body weight, blood pressure, and lipid profile. Electronic searches were conducted in MEDLINE, EMBASE, AMED, and the Cochrane Clinical Trials databases to identify relevant human randomized clinical trials (RCTs). Hand searches of bibliographies were also conducted. Only overweight and obese subjects were included. The reporting quality was assessed using the CONSORT checklist, and the strength of the overall body of evidence was rated based on the GRADE criteria. One hundred and fifty four citations were identified and three RCTs with a total of 250 participants were included. The RCTs were of moderate quality. A meta-analysis for change in body weight failed to reveal a significant difference between grapefruits and controls, MD: ?0.45 kg (95% CI: ?1.06 to 0.16; I2 = 53%, but analysis revealed a significant decrease in systolic blood pressure, MD: ?2.43 mmHg (95% CI: ?4.77 to ?0.09; I2 = 0%). Paucity in the number of RCTs, short durations of interventions, and lack of an established minimum effective dose limit the conclusions that can be drawn about the effects of grapefruit on body weight and metabolic parameters. Further clinical trials evaluating the effects of grapefruit are warranted. 相似文献