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黄酮类化合物对肿瘤细胞信号转导通路的影响 总被引:1,自引:1,他引:1
黄酮类化合物(flavonoes compounds),是指具有色酮环与苯环为基本结构的一类化合物的总称,是色原酮或色原烷的衍生物,以黄酮(2-苯基色原酮)为母核而衍生。黄酮类化合物包括黄酮类、黄酮醇类、异黄酮类、黄烷酮类等,具有抗氧化、抗炎、抗肿瘤、改善心血管功能、提高免疫力等生物学活性。目前其抗肿瘤作用是国内外研究的热点和焦点。肿瘤的发生机制较复杂。 相似文献
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目的设计合成一系列NO供体黄酮类化合物,考察其药理活性.方法以单羟基取代黄酮为母体,使羟基与NO供体片段相连,得到NO供体型黄酮衍生物.结果与讨论目标化合物的组成、结构经红外光谱、质谱和核磁共振氢谱确认,其抗炎活性不及相应的羟基黄酮化合物. 相似文献
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综述了近10年来从槐属植物中分离得到的黄酮类化合物及其药理活性,为该属植物的开发利用提供参考。新分得的黄酮类化合物包括二氢黄酮、二氢黄酮醇、异黄酮、二氢异黄酮和多环系黄酮等,药理活性包括抗菌、抗肿瘤、抗炎、抗病毒、抗雄性激素样作用等。 相似文献
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结构与非结构因素对黄酮类化合物抗氧化活性作用的影响 总被引:1,自引:0,他引:1
目的:为黄酮类化合物作为抗氧剂使用提供依据。方法:查阅国内、外近年来的相关文献,对结构与非结构因素对黄酮类化合物抗氧化活性作用的影响的研究进行综述。结果:黄酮类化合物B环取代羟基的数量和位置以及骨架的共轭情况对其抗氧化活性有影响;同时,疏水性、聚合度、浓度、体内的氧环境及与其他抗氧剂的协同作用等非结构因素对其抗氧化活性也有影响。结论:黄酮类化合物在生物体内具有显著的抗氧化效应,其抗氧化活性除受到自身的化学结构影响之外,还与其他非结构因素密切相关。 相似文献
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目的 研究藏药翁布中11种黄酮类化合物的体外抗氧化作用.方法 采用DPPH自由基清除活性、FRAP总抗氧化能力、ABTS总抗氧化能力和酪氨酸酶活性抑制等4种实验方法对11种黄酮化合物的自由基清除能力及抗氧化活性进行体外评价.结果 3,5,4'-三羟基-7-甲氧基黄酮、3,5,7-三羟基-4'-甲氧基黄酮、柽柳素、山奈酚、槲皮苷对DPPH自由基的清除较强(半数抑制浓度IC50低于维生素C);3,5,4 '-三羟基-7,3'-二甲氧基黄酮、山奈酚、5,7,4'-三羟基-3-O-β-D-葡萄糖醛酸、5,7,3',4'-四羟基-3-O-β-D-葡萄糖醛酸的ABTS总抗氧化值相对于Trolox标准溶液>0.01 mmol· L-1;FRAP法测得11种黄酮类化合物具有总抗氧化能力,但均低于阳性对照Trolox;11种黄酮类化合物对酪氨酸酶活性具有抑制活性,但IC50均高于阳性对照曲酸.结论 11种黄酮类化合物中,3,5,4'-三羟基-7-甲氧基黄酮、3,5,7-三羟基-4'-甲氧基黄酮、柽柳素、山奈酚、槲皮苷具有较强的抗氧化活性. 相似文献
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A new triterpenoid, namely, lanost-25-en-3-beta-ol, and two known flavonoids (kaempferol-3,6-dimethyl ether and kaempferol 7- O-glucoside) were isolated from the aerial parts of Chamaesyce prostrate (Euphorbiaceae). The structure of the new compound was established based on spectral evidences. 相似文献
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盾木酮类化合物是一类黄酮类衍生物,结构类型主要有黄烷醇型、黄酮醇型、二氢黄酮醇型及花色素型,主要分布在豆科云实亚科Umtiza属、角刺豆属、紫心苏木属、短盖豆属、仪花属、粗豆树属、云实属及两蕊苏木属,含羞草亚科的金合欢属,蝶形花亚科鱼藤属、鸡血藤属、灰毛豆属中,零星分布在鸢尾科、蓼科、大戟科、卫矛科、蓝雪科、楝科、藤黄... 相似文献
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Bagalkotkar G Sagineedu SR Saad MS Stanslas J 《The Journal of pharmacy and pharmacology》2006,58(12):1559-1570
This review discusses the medicinal plant Phyllanthus niruri Linn. (Euphorbiaceae), its wide variety of phytochemicals and their pharmacological properties. The active phytochemicals, flavonoids, alkaloids, terpenoids, lignans, polyphenols, tannins, coumarins and saponins, have been identified from various parts of P. niruri. Extracts of this herb have been proven to have therapeutic effects in many clinical studies. Some of the most intriguing therapeutic properties include anti-hepatotoxic, anti-lithic, anti-hypertensive, anti-HIV and anti-hepatitis B. Therefore, studies relating to chemical characteristics and structural properties of the bioactive phytochemicals found in P. niruri are very useful for further research on this plant as many of the phytochemicals have shown preclinical therapeutic efficacies for a wide range of human diseases, including HIV/AIDS and hepatitis B. 相似文献
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Thirty kinds of medicinal plants were screened to examine inhibitory activities on rat brain monoamine oxidase A, using serotonin as a substrate. As active principles, various kinds of stilbenes were isolated from Veratri Rhizoma, Reynoutriae Radix and Rhei undulati Rhizoma, and several kinds of flavonoids from Sophorac Flos, Chrisanthemi Flos andGlycine max. Among the compounds isolated, resveratrol(I) strongly inhibited MAO-A competitively, and its IC50 and Ki values were 2 μM and 2.5 μM, respectively. Inhibitory potencies towards MAO-A of some stilbenes and flavonoids were also compared. 相似文献
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The family Euphorbiaceae is widely distributed throughout both hemispheres and ranges in morphological form from large desert succulents to trees and even small herbaceous types. Many species contain a milky juice which is more or less toxic, especially for cold-blooded animals, and can produce a dermatitis similar to that from poison ivy. Separation procedures and characterization of the less polar fractions of the plant extracts have been widely described in the literature for their content in diterpene derivatives. In the continuing research on biologically active compounds from Euphorbiaceae, a series of studies on the isolation and structure elucidation of glyceroglycolipids (GGLs) and glycosphingolipids (GSLs) have been carried out in order to develop the novel medicinal resources from natural Euphorbiaceae products. Glyceroglycolipids are major constituents of the chloroplast membrane in the plant kingdom. Recently, glycolipids were found to possess antitumor-promoting activity while glyceroglycolipids isolated from Euphorbiaceae have shown an interesting anti-inflammatory activity in vivo. Glycosphingolipids are present at the outer layer of the lipid-bilayer in biological membranes and are thought to participate in antigen-antibody reactions and transmission of biologically informations. Sphingolipid breakdown products, sphingosine and lysosphingolipids, inhibit protein kinase C, a pivotal enzyme in cell regulation and signal transduction. Sphingolipids and lysosphingolipids affect significantly cellular responses and exhibit antitumor promoter activities in various mammalian cells. These molecules may function as endogenous modulators of cell function and possibly as second messengers. 相似文献
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目的 研究半枝莲中黄酮类化合物的体片抗肿瘤活性.方法 采用MTT法,测定半枝莲药材中的5个黄酮类化合物(木犀草素、野黄苓苷、黄苓素、芹莱素,4'-羟基汉黄苓素)休外分别对人肝癌细胞株HepG-2、人结肠癌细胞株SW480、人胃癌细胞株MGC-803、急性早幼拉细胞白血病细胞株HL-60、人红白血病细胞株K562的增殖抑... 相似文献
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黄酮类化合物抗肿瘤作用及其相关机制研究进展 总被引:1,自引:0,他引:1
黄酮类化合物种类繁多并广泛分布于自然界中,具有丰富的药理学活性。近年来,关于黄酮类化合物抗肿瘤作用的药理学研究日趋深入。大量研究结果表明,多种黄酮类化合物具有良好的体内外抗肿瘤活性,具有广阔的开发前景。该文综述了近年来国内外关于黄酮类化合物抗肿瘤作用及其相关机制的研究进展。 相似文献