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1.
藏药波棱瓜子中亚油酸和α-亚麻酸的含量测定方法研究   总被引:1,自引:0,他引:1  
目的拟建立一种适合藏药波棱瓜子中不饱和脂肪酸类成分亚油酸和α-亚麻酸含量的测定方法。方法在以往不饱和脂肪酸测定方法的基础上,对提取方法、提取溶剂以及影响测定结果的其他参数进行比较研究。结果经过方法学验证,线性关系良好,平均回收率亚油酸为98.99%,RSD=2.59%;α-亚麻酸为98.63%,RSD=2.55%。结论所改进的方法,可准确测定波棱瓜子中亚油酸和α-亚麻酸的含量,为其质量标准的制定提供了实验依据。  相似文献   

2.
藏药波棱瓜子的血清药物化学初步研究   总被引:1,自引:0,他引:1  
目的:对波棱瓜子乙酸乙酯提取物进行血清药物化学研究,为筛选确定波棱瓜子的药效成分奠定基础。方法:建立波棱瓜子乙酸乙酯提取物及大鼠含药血浆、空白血浆的HPLC指纹图谱分析方法;通过比较波棱瓜子乙酸乙酯提取物、含药血浆及空白血浆指纹图谱,确定其血浆移行成分。结果:在含药血浆中发现了5个移行成分,其中1个为原型成分,3个是代谢产物,另外一个在其提取物、空白血浆和含药血浆中均有出现,有待进一步研究。结论:血中移行成分和代谢产物可能成为波棱瓜子的体内直接作用物质,对其进行更深入的研究有助于探索其药效物质基础及作用机制。  相似文献   

3.
李海波  姚军  张顺 《右江医学》2023,(8):673-677
牡丹籽油富含多种不饱和脂肪酸,其中α-亚麻酸(α-linolenic acid, ALA)含量占比高达42%以上,ALA隶属于n-3多不饱和脂肪酸(n-3 PUFAs)家族,文献报道其对雄性动物的精子生成、精液质量、精液品质、生育力等有明显的促进作用,该文对牡丹籽油及其主要成分ALA对雄性动物的生育能力的影响进行综述,为牡丹籽油的保健功能开发提供新的思路。  相似文献   

4.
藏医药已有2000多年的历史,在吸收中医药、印度医学和阿拉伯医学的基础上自成体系。近年来,作为传统医学的一部分,其独特疗效日益受到国内外的关注。色吉美多,是藏药波棱瓜子的藏药名,始载于现存最早的藏药学著作《月王药诊》“波棱瓜子与纤毛婆婆纳、藏茵陈、止泻木煎汤,治疗‘赤巴’炎症;波棱瓜子与玉石等配伍治疗各种肝病”,著名藏医著作《晶珠本草》《四部医典》均有记载,《中华人民共和国药典》1985—2000年版附录和《中华人民共和国卫生部药品标准》(藏药)第一册均有收载,色吉美多主产于西藏、云南、四川,亦产于印度、尼泊尔,其性寒,…  相似文献   

5.
目的:研究波棱瓜子乙酸乙酯提取物对四氯化碳所致小鼠急性肝损伤的保护作用.方法:建立四氯化碳(CCl4)诱导小鼠肝损伤模型,以测定血清谷丙转氨酶(ALT)、谷草转氨酶(AST)和肝组织丙二醛(MDA)含量为指标来观察波棱瓜子乙酸乙酯提取物对四氯化碳所致小鼠急性肝损伤的保护作用.结果:波棱瓜子乙酸乙酯提取物高中低剂量组均能不同程度的降低动物模型的血清ALT、AST和肝脏MDA的含量.结论:渡棱瓜子乙酸乙酯提取物对化学性肝损伤具有明显的保护作用.  相似文献   

6.
脂肪酸与免疫功能的关系   总被引:2,自引:0,他引:2  
多不饱和脂肪酸有两类:n-3多不饱和脂肪酸与n-6多不饱和脂肪酸,其中最常见的n-3脂肪酸为亚麻酸,而最常见的n-6脂肪酸为亚油酸[1].研究表明,食物中的脂肪酸可以影响免疫系统的功能.它具有调整吞噬作用、促进细胞因子的产生和白细胞迁移的作用,也干预巨噬细胞的抗体表达[2].  相似文献   

7.
茺蔚子脂肪酸成分的研究   总被引:2,自引:2,他引:2  
目的:通过对茺蔚子脂肪酸成分的研究,为其资源开发利用提供科学依据.方法:采用气相色谱、气相色谱-质谱联用仪的分析方法,分析了茺蔚子中脂肪油的化学成分.结果:从中确定了10种化合物,其主要成分是亚油酸甲酯(51.48%),其次还含有γ-亚麻酸甲酯(11.31%)、油酸甲酯(27.79%)等,茺蔚子中含有大量的脂肪油,且脂肪油中含有大量人体所需的不饱和脂肪酸.结论:茺蔚子及其种子油具有较高的营养价值和医疗保健功效,具有较大开发利用的价值.  相似文献   

8.
脂肪酸与维生素、氨基酸一样,是人体必需的营养素,尤其是不饱和脂肪酸具有广泛而重要的生物学功能。根据不饱和脂肪酸分子的甲基端起第一个不饱和双键所联结的碳原子在碳链中的位置不同,分为n-3、n-6、n-7、n-9等,其中具有重要生物学功能的通常是n-3组和n-6组。n-3多不饱和脂肪酸(polyunsaturaed fatry acids,PUFAs)属长链不饱和脂肪酸(长链具有18—22个碳原子),  相似文献   

9.
目的提取、鉴定野生马齿苋脂肪酸有效成分的种类和含量,研究马齿苋脂肪酸的生物活性成份。方法对马齿苋鲜品全草(茎、叶及种子)脂肪油进行提取,经皂化-甲酯化处理,应用气相色谱-质谱分析法鉴定分析马齿苋脂肪酸有效成分的种类和含量。结果结果显示,马齿苋脂肪酸气质谱解析出16种成分,含亚油酸(22.57%)、ω-3脂肪酸(ω-3FA)—α-亚麻酸(α-LNA)(1.35%)、油酸(1.27%)、14-十八烯酸(24.37%)等不饱和脂肪酸共计49.57%。结论研究表明,马齿苋脂肪油富含多不饱和脂肪酸,其有效成分亚油酸、ω-3脂肪酸(ω-3FA)—α-亚麻酸(α-LNA)、油酸比较丰富,马齿苋作为一种新型的含有各种营养成分的绿色食品,在药品、食品、保健品等方面具有广阔的开发利用前景。  相似文献   

10.
吴健全 《开卷有益》2004,(12):24-25
脂肪酸是膳食脂肪的重要组成部分,也是体内脂肪代谢的中间产物。脂肪酸种类繁多,分类也相应复杂一些,按其碳链长短可分为长链脂肪酸(14碳以上)、中链脂肪酸(含6~12碳)和短链脂肪酸(5碳以下),按其饱和程度可分为饱和脂肪酸、单不饱和脂肪酸(碳链中只含有一个不饱和双键)、多不饱和脂肪酸(碳链中含有两个以上双键)。各种脂肪酸结构不同,功能也不一样。营养学上最具价值的脂肪酸有两类:n-3系列不饱和脂肪酸,即从甲基端数,第一个不饱和键在第三和第四碳原子间的各种不饱和脂肪酸;n-6系列不饱和脂肪酸,从甲基端数,第一个双键在第六和第七碳之间…  相似文献   

11.
时皎皎  糜漫天  韦娜  王斌  易龙  张乾勇 《重庆医学》2012,41(13):1252-1254
目的探讨不同膳食脂肪酸构成比对大鼠脂质代谢相关基因FAS及PPARαmRNA表达的影响。方法将48只雌性SD大鼠随机分成6组,喂养6种不同膳食脂肪酸构成的饲料,即饱和脂肪酸组(SFA组)、单不饱和脂肪酸组(MUFA组)、n-6多不饱和脂肪酸组(n-6PUFA组)、n-3多不饱和脂肪酸组(n-3PUFA组)、1∶1n-6/n-3组及对照组,持续喂养18周。在实验末提取大鼠肝脏组织,利用逆转录-聚合酶链反应(RT-PCR)技术检测大鼠肝脏组织中FAS及PPARαmRNA表达。结果 SFA、MUFA对PPARα的表达无明显影响。与对照组比较,SFA能显著地升高FAS mRNA的表达,而MUFA能显著降低FAS mR-NA表达(P<0.05)。对于PUFA,它们调节血脂的效应更加全面,能够显著降低脂质合成中的关键酶FAS的表达同时升高PPARα的表达。结论 PUFA调节血脂的作用机制可能与脂代谢基因FAS和PPARα有关。  相似文献   

12.
高温加热对食用油中α—亚麻酸等含量的影响   总被引:2,自引:0,他引:2  
本文用羟肟酸快速测定法对高温加热后常用食用油中α-亚麻酸和亚油酸等重要不饱和脂肪酸含量变化进行了研究。揭示了食用油的种类、品质及烹调方式与营养学的关系和对人民健康的意义。  相似文献   

13.
槐花、槐米和槐叶脂肪酸成分的GC-MS分析   总被引:3,自引:1,他引:2  
目的:研究槐花、槐米和槐叶中的脂肪酸成分。方法:采用索氏提取法分别提取槐花、槐米和槐叶中的脂溶性成分,用气相色谱-质谱联用检测其化学成分。结果:从槐花中分离鉴定了22个化学成分,占色谱总馏分出峰面积的86.73%,从槐米中分离鉴定了16个化学成分,占色谱总馏分出峰面积的55.74%,从槐叶中分离鉴定了14个化学成分,占色谱总馏分出峰面积的66.5%。结论:有7种化合物:硬脂酸、肉豆蔻酸、亚油酸、亚麻酸、花生酸、山嵛酸和植醇是槐花、槐米和槐叶所共有的。  相似文献   

14.
N-3 polyunsaturated fatty acids and inflammation in the arterial wall   总被引:1,自引:0,他引:1  
Atherosclerosis, leading to cardiovascular disease, is a chronic condition involving a strong inflammatory component. There is evidence that the n-3 polyunsaturated fatty acids (PUFA) present in oily fish and fish oils protect against cardiovascular disease. While these fatty acids have well-recognised effects on plasma triacylglycerol concentrations, it is likely that they exert beneficial effects through other mechanisms in addition. A large body of evidence suggests that the n-3 PUFA have anti-inflammatory properties, some of which may be manifested in the arterial wall, either directly or indirectly, to modulate the progression of atherosclerosis. This review critically evaluates the evidence for the anti-inflammatory effects of the n-3 PUFA in cells and on pathways which have a direct influence on atherogenesis in the arterial wall.  相似文献   

15.
目的分析中链饱和脂肪酸(MC-SFA,MCF组)、长链饱和脂肪酸(LC-SFA,LCF组)、n-6多不饱和脂肪酸(n-6 PUFA,SUF组)和n-3多不饱和脂肪酸(n-3 PUFA,TUF组)四种脂肪酸对大鼠血清脂肪酸及胰岛素抵抗的影响。方法雄性SD大鼠40只随机分为5组,对照组给予普通日粮,高脂组给予脂肪热量比相同的高脂日粮。喂养10周,每18 d测定空腹血糖(GLU)、血清脂肪酸、血清胰岛素水平,根据胰岛素敏感性指数(ISI)=ln1/(FPG×FINS)评定大鼠的胰岛素敏感性。结果10周后,LCF组和SUF组大鼠体重显著高于对照组和其它高脂组;LCF组血清胰岛素显著高于对照组(P﹤0.05);LCF组、TUF组ISI显著低于对照组(P﹤0.05);各组间血糖无明显差异(P0.05)。SUF组、TUF组血清LC-SFA浓度显著低于LCF组(P﹤0.05);TUF组血清(n-3 PUFA)显著高于对照组和其它高脂组(P﹤0.05)。结论不同类型脂肪酸的高脂饲料对SD大鼠的血清脂肪酸组成和含量有显著的影响,SD大鼠脂肪沉积及胰岛素抵抗程度随血清脂肪酸代谢作用的不同而变化。  相似文献   

16.
《中国现代医生》2019,57(25):42-47+53+169
目的探讨不同比例的n-6和n-3多不饱和脂肪酸对急性心肌梗死大鼠心肌细胞的保护作用。方法采用连续注射异丙基肾上腺素的方法构建急性心梗大鼠模型。通过酶联免疫法检测大鼠血清中NT-proBNP、h FABP和cTn I的水平;TTC和TUNEL染色评估心肌梗死面积和心肌细胞凋亡程度。Western blot和QPCR检测心梗标记基因和凋亡因子的表达。通过向心脏注射干扰NT-proBNP、hFABP、cTn I的慢病毒,进一步检测AMI心肌细胞的凋亡情况。结果日粮中添加n-6/n-3多不饱和脂肪酸比例1∶5和1∶10导致AMI大鼠在心梗发生后0、4、8和12 h的NT-proBNP、hFABP和cTnI水平、心梗面积和心肌细胞凋亡均明显低于基础日粮饲喂的AMI大鼠;且1∶10比例的n-6/n-3多不饱和脂肪酸抑制效果最为明显。干扰AMI大鼠心肌NT-proBNP和hFABP导致cTn I、Bax表达降低,Bcl-2表达升高。结论日粮添加1∶10比例的n-6/n-3多不饱和脂肪酸能有效缓解急性心肌梗死的发生,且NT-pro BNP和hFABP的表达水平是参与心梗后心肌细胞凋亡的重要因子。  相似文献   

17.

Objective:

To re-investigate the composition of ackee oil and unequivocally determine its principal fatty acid components.

Methods:

Oil was extracted from the edible portion of ackees harvested in three different studies (I–III) by several analysts; studies I and II utilized composite samples from several trees while study III consisted of ackees from seven separate trees. The oils were either saponified and methylated or trans-methylated and the fatty acid methyl ester content analysed by gas chromatography-mass spectrometry (GC-MS). Relative fatty acid composition was quantified based on chromatographic peak areas while fatty acids were identified by mass spectrometry. The degree of unsaturation of the ackee oils was characterized by determination of the iodine value.

Results:

Gas chromatography-mass spectrometry data from the three studies were assessed. Relative fatty acid composition for the ackee oils was consistent across the three studies. The major fatty acid components were oleic acid (55.44%), palmitic acid (25.57%) and stearic acid (12.59%); linoleic acid was present in minor to undetectable amounts. An iodine value of 49 was determined which is consistent with the high oleic acid content of the ackee oil.

Conclusion:

The ackee samples analysed were rich in the monounsaturated fatty acid (MUFA) oleic acid. Consideration should be given to potential protective health effects of diets which include ackee.  相似文献   

18.
茅小燕  张爱珍  李铎 《中国全科医学》2007,10(18):1508-1510
目的探讨2型糖尿病患者血清磷脂脂肪酸谱及其与血脂的相关性。方法采用高效气相色谱法测定2型糖尿病组和健康对照组的血清磷脂脂肪酸谱,酶法测定血脂,分析二者的相关性。结果2型糖尿病组C16:0、C18:0、C18:1、C20:0、C20:2n-6、C20:1、饱和脂肪酸(SFA)、单不饱和脂肪酸(MUFA)、n-6/n-3显著高于健康对照组(P〈0.05);C18:2n-6、C20:3n-6、C22:6n-3、多不饱和脂肪酸(PUFA)、PUFA/SFA、n-6PUFA、n-3PUFA显著低于健康对照组(P〈0.05)。2型糖尿病患者的C16:1、C20:1、C22:2n-6与总胆固醇(TC)呈负相关(P〈0.05);C22:2n-6、n-3PUFA与三酰甘油(TG)呈负相关(P〈0.05);n-6PUFA、PU-FA、PUFA/SFA与高密度脂蛋白胆固醇(HDL-C)呈正相关(P〈0.05);C18:0与低密度脂蛋白胆固醇(LDL-C)呈正相关(P〈0.01);C16:1、C22:2n-6与LDL-C呈负相关(P〈0.05)。结论2型糖尿病患者血清磷脂脂肪酸谱与健康者不同。2型糖尿病患者SFA、MUFA高于健康者,而PUFA低于健康者。SFA与LDL-C呈正相关,MUFA与TC、LDL-C呈负相关,PUFA与TC、TG、LDL-C呈负相关,PUFA与HDL-C呈正相关。  相似文献   

19.
Abstract

Background. The interest in n-3 polyunsaturated fatty acids (PUFAs) has expanded significantly in the last few years, due to their many positive effects described. Consequently, the interest in fish oil supplementation has also increased, and many different types of fish oil supplements can be found on the market. Also, it is well known that these types of fatty acids are very easily oxidized, and that stability among supplements varies greatly.

Aims of the study. In this pilot study we investigated the effects of two different types of natural fish oils containing different amounts of the n-3 PUFAs eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) and antioxidants on plasma and brain fatty acids, blood lipids, vitamin E, and in vivo lipid peroxidation, as well as brain nitric oxide synthase (NOS) activity, an enzyme which has been shown to be important for memory and learning ability.

Methods. Sprague-Dawley rats were divided into four groups and fed regular rat chow pellets enriched with 5% (w/w) of butter (control group), a natural fish oil (17.4% EPA and 11.7% DHA, referred to as EPA-rich), and a natural fish oil rich in DHA (7.7% EPA and 28.0% DHA, referred to as DHA-rich). Both of the fish oils were stabilized by a commercial antioxidant protection system (Pufanox®) at production. The fourth group received the same DHA-rich oil, but without Pufanox® stabilization (referred to as unstable). As an index of stability of the oils, their peroxide values were repeatedly measured during 9 weeks. The dietary treatments continued until sacrifice, after 10 days.

Results. Stability of the oils varied greatly. It took the two stabilized oils 9 weeks to reach the same peroxide value as the unstable oil reached after only a few days. Both the stabilized EPA- and DHA-rich diets lowered the triacylglycerols and total cholesterol compared to control (-45%, P < 0.05 and -54%, P < 0.001; -31%, P < 0.05 and -25%, P < 0.01) and so did the unstable oil, but less efficiently. Only the unstable oil increased in vivo lipid peroxidation significantly compared to control (+40%, P < 0.001). Most of the fatty acids in the plasma phospholipids were significantly affected by both the EPA- and DHA-rich diets compared to control, reflecting their specific fatty acid pattern. The unstable oil diet resulted in smaller changes, especially in n-3 PUFAs. In the brain phospholipids the changes were less pronounced, and only the diet enriched with the stabilized DHA-rich oil resulted in a significantly greater incorporation of DHA (+13%, P < 0.01), as well as total n-3 PUFAs (+13%, P < 0.01) compared to control. Only the stabilized DHA-rich oil increased the brain NOS activity (+33%, P < 0.01).

Conclusions. Both the EPA- and DHA-rich diets affected the blood lipids in a similarly positive manner, and they both had a large impact on plasma phospholipid fatty acids. It was only the unstable oil that increased in vivo lipid peroxidation. However, the intake of DHA was more important than that of EPA for brain phospholipid DHA enrichment and brain NOS activity, and the stability of the fish oil was also important for these effects.  相似文献   

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