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Basic studies on possible application of anti-oxidative fraction and constituents of crude drug origin to preventive medicine

抗氧化部位及药材来源成分在预防医学中的可能应用基础研究

基本信息

批准号：
10671998
负责人：
KINOSHITA Takeshi
金额：
$ 0.64万
依托单位：
Teikyo University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 1999
项目状态：
已结题

项目摘要

1. Chemical investigation was carried out intensively on the methylene chloride extract (PT ext.) of Glycyrrhiza glabra root (Russian licorice) to afford four minor phenolic constituents, two isoflavanones (RL-Q and RL-R), one 3-arylcoumarine (RL-U) and one chromenochromane (RL-V), all of which were undescribed literally, Structures of these compounds were elucidated as 2',4'-dihydroxy-[6",6"-dimethylpyrano(2",3":7,8)]-isoflavanone, [6",6"-dimethylpyrno(2",3":7,8)]-2'-hydroxy,4'-methoxy-isoflavanone, 4',7-dihydroxy-[6",6"-dimethylpyno(2",3":2',3')]-3-arylcoumarin [6',6' -dimethylpyrano(2', 3' : 7, 8)]-benzopyran-3-ol, respectively, on the spectroscopic basis.2. Constituents obtained from Russian licorice described above were tested for anti-microbial activity against gram-positive bacteria including MRSA, yeasts, moulds, and so on. Some of phenolic constituents of this licorice showed potent activity against wide variety of microorganisms.3. The above constituents were assayed for anti … More -oxidative activity on linoleic acid, scavenging activity of superoxide anion (SOィイD3-(/)2ィエD3) generated in both xanthine-xanthine oxidase and microsomal systems, and preventing activity of lipid peroxidation in both microsomal and mitochondrial systems. Many of licorice constituents exhibited outstanding anti-oxidative activity in various assay systems indicating that licorice extract (PT ext.) is a promising agent for the prevention of disease in which active oxygen species are suspected to be implicated on the in-vitro basis. It is of particular interest to note that RL-M showed the most potent anti-oxidative activity among licorice constituents tested though it does not possess catechol moiety that is fond very commonly in naturally occurring antioxidants, Licorice extract also showed significant inhibitory activity against oxidative hemolysis of human erythrocytes, but this assay failed to assess anti-oxidative hemolysis activity of purified constituents due to their direct action to erythrocyte membrane. Less

1. 对甘草根（俄罗斯甘草）二氯甲烷提取物（PT ext.）进行了深入的化学研究，得到了四种微量酚类成分，两种异黄酮（RL-Q和RL-R），一种3-芳基coumarine （RL-U）和一种chromenochromane (RL-V)，所有这些化合物的结构都被证实为2',4'-二羟基-[6 ',6 '-二甲基吡喃（2 ',3 ':7,8）]-异黄酮酮。[6',6' -二甲基吡喃（2',3':7,8）]-2'-羟基，4'-甲氧基异黄酮酮，4‘，7-二羟基-[6 ’，6' -二甲基吡喃（2',3':2',3‘）]-3-芳基香豆素[6’，6' -二甲基吡喃（2',3':7,8）]-苯并吡喃-3-醇]。从上述俄罗斯甘草中获得的成分对革兰氏阳性细菌（包括MRSA、酵母、霉菌等）的抑菌活性进行了测试。该甘草的某些酚类成分对多种微生物具有较强的抗微生物活性。测定了上述成分对亚油酸的抗氧化活性，对黄嘌呤-黄嘌呤氧化酶和微粒体系统中产生的超氧阴离子（SO γ γ γ D3-(/)2 γ γ γ γ γ D3）的清除活性，以及对微粒体和线粒体系统中脂质过氧化的抑制活性。许多甘草成分在各种检测系统中显示出出色的抗氧化活性，表明甘草提取物（PT ext.）是一种有希望的药物，可以预防在体外基础上涉及活性氧的疾病。值得注意的是，RL-M在甘草成分测试中显示出最有效的抗氧化活性，尽管它不具有天然抗氧化剂中非常常见的儿茶酚部分，甘草提取物也显示出对人红细胞氧化溶血的显著抑制活性，但由于纯化成分直接作用于红细胞膜，因此该试验未能评估其抗氧化溶血活性。少