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安息香和乳香化学成分及抗肿瘤活性研究

Chemical Constituents of Benzoin and Olibanum and Their Antitumor Activity

【作者】 王峰

【导师】 华会明;

【作者基本信息】 沈阳药科大学 , 药物化学, 2007, 博士

【摘要】 安息香为安息香科植物越南安息香(Styrax tonkinensis)的树脂,为乔木,主要分布于东南亚泰国和越南等几个国家和地区。在中国,安息香(benzoin)主要用于祛痰。乳香为橄榄科植物卡氏乳香(Boswellia carterii)的树脂,乔木,分布于索马里和埃塞俄比亚,乳香(olibanum)用于治疗冠心病、心绞痛和溃疡。本文在综述了安息香属和乳香属植物化学成分和药理活性的基础上,对这两种树脂类药材进行了系统的化学成分和抗肿瘤活性研究。从安息香的95%乙醇提取液中,分离得到17个化合物。通过各种理化常数测定、波谱分析等方法,鉴定了其结构。它们分别是:6β-羟基-3-氧代-11α,12α-环氧齐墩果-28,13β-内酯(6β-hydroxy-3-oxo-11α,12α-epoxyolean-28,13β-olide,1),3β,6β-二羟基-11α,12α-环氧齐墩果-28,13β-内酯(3β,6β-dihydroxy-11α,12α-epoxyolean-28,13β-olide,2),3β,6β-二羟基-11-氧代-齐墩果-12-烯-28-酸(3β,6β-dihydroxy-11-oxo-olean-12-en-28-oic acid,3),3β-羟基-12-氧代-13Hα-齐墩果-28,19β-内酯(3β-hydroxy-12-oxo-13Hα-olean-28,19β-olide,4),19α-羟基-3-氧代齐墩果-12-烯-28-酸(19α-hydroxy-3-oxo-olean-12-en-28-oic acid,5),6β-羟基-3-氧代齐墩果-12-烯-28-酸(6β-hydroxy-3-oxo-olean-12-en-28-oic acid,6),苏门答腊树脂酸(sumaresinolic acid,7),泰国树脂酸(siaresinolic acid,8),齐墩果酸(oleanolic acid,9),trans-(四氢-2-(4-羟基-3-甲氧基苯基)-5-氧代呋喃-3-基)甲基苯甲酸酯[trans-(tetrahydro-2-(4-hydroxy-3-methoxyphenyl)-5-oxofuran-3-yl)methyl benzoate,10],3-(4-羟基-3-甲氧基苯基)-2-氧代丙基苯甲酸酯[3-(4-hydroxy-3-methoxyphenyl)-2-oxopropylbenzoate,11],4-((E)-3-乙氧基丙-1-烯基)-2-甲氧基苯酚[4-((E)-3-ethoxyprop-1-enyl)-2-methoxyphenol,12],苯甲酸(benzoic acid,13),香草醛(vanillin,14),去氢双香草醛(dehydrodivanillin,15),香草酸(vanillic acid,16),松柏醛(coniferyl aldehyde,17)。其中,化合物1,2,3,4,10,11为未见文献报道的新化合物;化合物12为一新的天然产物。利用多种色谱技术,从乳香的氯仿提取物中,分离得到22个化合物。通过各种理化常数测定、波谱分析等方法,鉴定了其中21个化合物的结构。它们分别是:α-香树素(α-amyrin,B1),β-乳香酸(β-boswellic acid,B2),乙酰11α-甲氧基-β-乳香酸(acetyl 11α-methoxy-β-boswellic acid,B3),11-羰基-β-乳香酸(11-keto-β-boswellic acid,B4),乙酰11-羰基-β-乳香酸(acetyl 11-keto-β-boswellic acid,B5),9,11-去氢-β-乳香酸(9,11-dehydro-β-boswellic acid,B6),乙酰β-乳香酸和乙酰α-乳香酸(acetylβ-boswellic acid和acetylα-boswellic acid,B7),α-乳香酸(α-boswellic acid,B8),9,11-去氢-α-乳香酸(9,11-dehydro-α-boswellic acid,B9),3β,20β-18Hα-乌苏烷二醇(3β,20β-18Hα-ursanediol,B10),乙酰α-榄香醇酸(acetylα-elemolic acid,B11),3β-羟基甘遂-8,24-二烯-21-酸(3β-hydroxytirucalla-8,24-dien-21-oic acid,B12),榄香酮酸(elemonic acid,B13),3-氧代-甘遂-7,9(11),24-三烯-21-酸[3-oxotirucalla-7,9(11),24-trien-21-oic acid,B14],3α-羟基甘遂-7,24-二烯-21-酸(3α-hydroxytirucalla-7,24-dien-21-oic acid,B15),3α-羟基甘遂-24-烯-21-酸(3α-hydroxytirucall-24-en-21-oic acid,B16),incensole(B17),acetyl incensole(B18),incensole-oxide(B19),acetyl incensole-oxide(B20),α-棕榈酸甘油酯(α-glyceryl palmitate,B21)。其中,化合物B10和B14为新化合物。对从安息香和乳香中分离得到的部分化合物的抗肿瘤活性进行了研究。安息香中分离得到的三萜类化合物1-9对HL-60细胞具有一定的生长抑制作用,IG50值为8.9μM到99.4μM之间,其中化合物9活性最强;虽然化合物3(3β,6β-二羟基-11-氧代-齐墩果-12-烯-28-酸)细胞生长抑制作用最弱,但该化合物却是9个三萜中唯一一个具有分化诱导作用的化合物。乳香中分离得到的四环(B11、B13、B15)、五环三萜(B3、B4、B5、B6、B7、B9)及二萜(B18)在不同浓度下对白血病细胞HL-60都具有细胞生长抑制作用,IG50值位于12.3μM到21.8μM之间。通过吖啶橙(AO)和溴化乙啶(EB)染色后的形态计数,对这些化合物的诱导HL-60细胞凋亡作用进行了考察,所有这些三萜对HL-60细胞都具有凋亡诱导作用。研究了对HL-60细胞具有较强生长抑制作用的化合物对PC-3细胞生长抑制活性,结果表明,化合物B3-5,B7和B11对PC-3细胞具有很强的生长抑制活性,IG50为16.5到62.3μM之间。对三萜抑制HL-60细胞生长活性的构效关系进行了初步探讨。通过对乳香中甘遂烷型三萜的研究,结合文献检索,总结了甘遂烷型三萜的结构及波谱特征。

【Abstract】 Styrax tonkinensis (Pier.) Craib (Styracaceae) is an arbor distributed in severalregions of South-East Asia. Its resin, benzoin, has been used as an expectorant inChina. Boswellia carterii Birdw (Burseraceae) is also an arbor distributed in Somaliaand Ethiopia. Its resin, olibanum, was used to treat aoronary disease, angina pectoris,and ulcer in China. Based on the review on the chemical constituents andpharmacological research of Styrax and Boswellia, the chemical constituents and theirantitumor activities of the two resins were researched.By means of many different chromatographic methods such as silica gel,Sephadex LH-20, reversed phase ODS column chromatography and preparative TLC,17 compounds were isolated from benzoin. By physico-chemical data and spectralmethods, all the compounds were identified as 6β-hydroxy-3-oxo-11α,12α-epoxyolean-28, 13β-olide (1), 3β, 6β-dihydroxy-11α, 12α-epoxyolean-28,13β-olide (2), 3β, 6β-dihydroxy-11-oxo-olean-12-en-28-oic acid (3), 3β-hydroxy-12-oxo-13Hα-olean-28, 19βolide (4), 19α-hydroxy-3-oxo-olean-12-en-28-oic acid(5), 6β-hydroxy-3-oxo-olean-12-en-28-oic acid (6), sumaresinolic acid (7),siaresinolic acid (8), oleanolic acid (9), trans-(tetrahydro-2-(4-hydroxy-3-meth0xyphenyl)-5-oxofuran-3-y1)methyl benzoate (10), 3-(4-hydroxy-3-methoxypheny1)-2-oxopropyl benzoate (11), 4-((E)-3-ethoxyprop-1-enyl)-2-methoxyphenol(12), benzoic acid (13), vanillin (14), dehydrodivanillin (15), vanillic acid (16) andconiferyl aldehyde (17). Among them, compounds 1-4, 10 and 11 were determined asnew compounds and compound 12 was a new natural product.By means of many different chromatographic methods such as silica gel,Sephadex LH-20, reversed phase ODS column chromatography and preparative TLC,22 compounds were isolated from olibanum. 21 of them were authenticated byphysico-chemical data and spectral methods, and they wereα-amyrin (B1),β-boswellic acid (B2), acetyl 11α-methoxy-β-boswellic acid (B3), 11-keto-β-boswellic acid (B4), acetyl 11-keto-β-boswellic acid (BS), 9,11-dehydro-β-boswellic acid (B6), acetylβ-boswellic acid and acetylα-boswellic acid (B7),α-boswellic acid (BS), 9,11-dehydro-α-boswellic acid (B9), 3β20β-18Hα-ursanediol(B10), acetylα-elemolic acid (B11), 3β-hydroxytirucalla-8,24-dien-21-oic acid (B12),elemonic acid (B13), 3-oxotirucalla-7, 9(11), 24-trien-21-oic acid (B14), 3α- hydroxytirucalla-7, 24-dien-21-oic acid (B15), 3α-hydroxytirucall-24-en-21-oic acid(B16), incensole (B17), acetyl incensole (B18), incensole-oxide (B19), acetylincensole-oxide (B20) andα-glyceryl palmitate (B21). Among them, compounds B10and B14 were determined as new compounds.The antitumor activities of the triterpenes and diterpenes isolated from benzoinand olibanum were researched. By testing in human leukemia HL-60 cells, it wasfound that all triterpenoids 1-9 isolated from benzoin inhibited cell growth withdifferent activity. Compound 9 was the most potent with an IG50 of 8.9μM, whilecompound 3 was the least effective growth inhibitor with an IG50 of 99.4μM. The celldifferentiation ability of these triterpenoids was measured in HL-60 cells using NBTreduction assay. Only compound 3 showed differentiation induction in HL-60 cells atnon-toxic concentrations. Tetracyclic triterpenoids (B11, B13, B15), pentacyclictriterpenoids (B3, B4, B5, B6, B7, B9) and diterpenoid (B18) isolated from olibanumwere effective cell growth inhibitors with IG50s ranged from 12.3μM to 21.8μM. Theapoptotic effects in HL-60 cells were also examined by morphological observationafter AO and EB staining. All these triterpenoids induced HL-60 cells undergoapoptosis in a dose-and time-dependent manner. Some triterpenes with stronger cellgrowth inhibition ability in HL-60 cells were selected to test their growth inhibitoryeffect in PC-3 cells. The data indicated that compounds B3-5, B7 and B11 hadinhibitory effect on growth of PC-3 cells, with the IG50s ranged from 16.5 to 62.3μM.Based on the growth inhibition activity, the structure-activity relationship oftriterpenes was discussed.In term of the research on tirucallane-type triterpenoid isolated from olibanumadding to the related literatures, an overview on the spectral and structuralcharacteristics of tirucallane-type tfiterpenoid was taken.

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