CN102010396B - 具有抗肿瘤和抗菌活性的十元环内酯类化合物 - Google Patents
具有抗肿瘤和抗菌活性的十元环内酯类化合物 Download PDFInfo
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/30—Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change
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- Preparation Of Compounds By Using Micro-Organisms (AREA)
Abstract
本发明涉及医药技术领域,是从植物内生真菌Cytospora sp.发酵物中分离得到的16种具有抗肿瘤和抗菌活性的十元环内酯类化合物Cytospolides A~P。体外抗肿瘤试验表明,化合物Cytospolides A~P对HCT116(人结肠癌细胞)、A549(人肺癌细胞)、QGY-7703(人肝癌细胞)、A375(人黑色素瘤细胞)、U937(人白血病细胞)肿瘤细胞株有明显的抑制作用;体外抗菌试验表明,化合物Cytospolides A~P对花药黑粉菌、壳针孢叶枯病菌、大肠杆菌、巨大芽孢杆菌有明显的抑菌效果。因此可用于制备抗肿瘤或抗菌的药物。本发明为研制抗肿瘤和抗菌药物提供了新的先导化合物,为开发利用植物内生菌资源具有重要意义。
Description
技术领域
本发明涉及医药技术领域,是一类从植物内生真菌Cytospora sp.发酵物中分离得到的16种具有抗肿瘤和抗菌活性的十元环内酯类化合物Cytospolides A~P。
背景技术
内生真菌(endophytic fungus)是存在于健康植物的茎叶中,形成不明显侵染的一类真菌。内生真菌作为主要的微生物物种,种类及数量庞大,分布的宿主植物范围广,其所处的微生态系统的多样性,加上宿主植物本身所处生态环境的多样性,因而其次生代谢产物也具有丰富的多样性,能够为天然药物的研究提供丰富的潜在资源。内生真菌Cytospora sp.属于半知菌亚门(Deuteromycotina)、腔孢纲(Coelomycetes)、球壳孢目(Sphaeropsidales)、壳囊孢属(Cytospora)真菌。Cytosporasp.菌株分离自冬青目(Aquifoliales)、冬青科(Aquifoliaceae)、冬青属(Ilex)植物加那利冬青(Ilex canariensis),加那利冬青是一种常绿灌木,采自西班牙戈梅拉岛(Gomera)。已报道的从壳囊孢属真菌中分离的化合物约有35个。化合物类型有大环内酯类、聚酮类、二蒽醌类、异香豆素类、萘酮类等。部分化合物都具有较强的生物活性,如抗真菌、抗细菌、抗氧化、抗病毒等活性。但至今未见从内生真菌Cytospora sp.中分离到具有抗肿瘤和抗菌活性的十元环内酯类化合物Cytospolides A~P的报道。
发明内容
本发明提供从植物内生真菌Cytospora sp.发酵物中提取分离得到的16种具有抗肿瘤和抗菌活性的十元环内酯类新化合物,分别命名为CytospolidesA~CytospolidesP,化合物编号依次为1~16,它们的化学结构通式如下:
其中,R1基团为CH3 R2基团为OH或=O或OAc
R3基团为OH或H或双键 R4基团为OAc或-O-或双键
R5基团为OH或H或OAc或-O- R6基团为OH或H或OAc
R7基团为H或OAc
所说16种化合物的基团搭配分别如下:
本发明化合物CytospolidesA~P的制备和结构鉴定方法如下:
1.制备化合物Cytospolides A~P
将内生真菌Cytospora sp.发酵物(由德国不伦瑞克大学提供)用少量氯仿完全溶解,用正相硅胶色谱(200~300目)分离,以二氯甲烷∶丙酮体积比为100∶1,80∶20,50∶50,30∶70,1∶100的洗脱液进行梯度洗脱,根据薄层板监测,将各流份按照极性的差别从小到大共收集18个部分洗脱液Fr 1~Fr 18;然后每部分用不同条件的洗脱剂多次进行正向硅胶柱层析或Sephadex LH-20凝胶色谱。经过多次不同条件的分离之后得到一系列单体化合物,根据各种单体化合物的特性,分别再经重结晶或制备型HPLC纯化,最后得16种新化合物Cytospolides A~P。
2.结构鉴定
经NMR、HRMS、CD、UV、IR、X-射线单晶衍射等多种现代光谱技术,以及重结晶、乙酰化、Mosher反应等化学方法进行结构鉴定,确定了16种化合物Cytospolides A~P的化学结构及立体构型:
化合物1、2、3、5、10的绝对构型为(2R,3R,8S,9R);化合物4的绝对构型为(2S,3R,8S,9R);化合物6、7、8、9的绝对构型为(2R,3R,8S,9R,13S);化合物11的绝对构型为(2R,3R,9R);化合物12的绝对构型为(2R,3R,9R,13S);化合物13和14的绝对构型为(2R,3S,4R,5R,8S,9R);化合物15的绝对构型为(2R,5R,8S,9R);化合物16的绝对构型为(2S,5R,8S,9R)。
Cytospolides A:C17H28O5,淡黄色针状结晶。-119.25(c0.187,CHCl3);m.p.121-123℃;IR(film)vmax=3506,2930,2859,1741,1670,1510,1459,1376,1238,1177,1107,1066,1020,989,912cm-1;UV(CH3CN):λmax(ε):221(2455)nm;CD(CH3CN,c 2.0×10-4):λmax(Δε)=196(-18.27)nm,224.5(+0.99)nm;HRMS(ESI):m/z:calcd for C17H28O5Na:335.1834;found:335.1837[M+Na]+。1H and 13C NMR数据见表1。
Cytospolide B:C19H30O6,无色油状物。-54.76(c 0.042,CHCl3);IR(film)vmax=2928,2856,1740,1454,1372,1236,1169,1108,1064,1022cm-1;UV(CH3CN):λmax(ε):216(1581)nm;HRMS(ESI):m/z:calcd for C19H30O6Na,377.1940;found:377.1941[M+Na]+。1H and13C NMR数据见表1。
Cytospolide C:C15H26O4,无色油状物。-89.53(c 0.382,CHCl3);CD(CH3CN,c 2.4×10-4):λmax(Δε)=195(-10.19)nm;IR(film)vmax=3436,2954,2929,2861,1718,1456,1375,1181,1101,1067,989,910cm-1;UV(CH3CN):λmax(ε):222(2276)nm;HRMS(ESI):m/z:calcd for C15H26O4Na,293.1729;found:293.1731[M+Na]+。1H and13C NMR数据见表2。
Cytospolide D:C15H26O4,白色晶体。+33.33(c 0.093,CHCl3);m.p.124-125℃;CD(CH3CN,c 2.2×10-4):λmax(Δε)=200(+10.03)nm;IR(film)vmax=3360,3193,3003,2924,2854,1706,1660,1634,1463,1416,1265,1020,976cm-1;UV(CH3CN):λmax(ε):221(2280)nm;HRMS(ESI):m/z:calcd for C15H26O4Na,293.1729;found:293.1728[M+Na]+。1H and13C NMR数据见表3。
Cytospolide E:C17H28O5,无色油状物。-75.0(c 0.112,CHCl3);IR(film)vmax=3360,3196,2926,2854,1736,1664,1633,1461,1372,1238,1169,1102,1026,978cm-1;UV(CH3CN):λmax(ε):221(2156),246v(1418),256(1491)nm;HRMS(ESI):m/z:calcd for C17H28O5Na,335.1834;found:335.1831[M+Na]+。1H and13CNMR数据见表2。
Cytospolide F:C15H26O5,无色油状物。-72.73(c 0.077,CHCl3);CD(CH3CN,c 2.0×10-4):λmax(Δε)=195(-11.48)nm;IR(film)vmax=3415,3004,2920,1716,1656,1436,1410,1317,1185,1022,953,903,707cm-1;UV(CH3CN):λmax(ε):219(2449)nm;HRMS(ESI):m/z:calcd for C15H26O5Na,309.1678;found:309.1675[M+Na]+。1H and13C NMR数据见表4。
Cytospolide G:C17H28O6,无色油状物。-53.71(c 0.054,CHCl3);IR(film)vmax=3406,2930,2857,1737,1670,1457,1375,1240,1180,1106,1065,1024,990,943cm-1;UV(CH3CN):λmax(ε):221(1797)nm;HRMS(ESI):m/z:calcd for C17H28O6Na,351.1784;found:351.1785[M+Na]+。1H and13C NMR数据见Table 4。
Cytospolide H:C19H30O7,无色油状物。-88.89(c0.009,CHCl3);IR(film)vmax=3454,3360,3197,2924,2853,1736,1662,1462,1440,1375,1242,1176,1107,1065,1023,989cm-1;UV(CH3CN):λmax(ε):215(1829)nm;HRMS(ESI):m/z:calcd for C19H30O7Na,393.1889;found:393.1887[M+Na]+。1H and13C NMR数据见Table 5。
Cytospolide I and J(混合物):C17H28O6,无色油状物。-80.33(c0.061,CHCl3);CD(CH3CN,c 2.0×10-4):λmax(Δε)=196(-15.16)nm;IR(film)vmax=3443,2929,2855,1728,1668,1453,1373,1247,1177,1101,1068,1043,989cm-1;UV(CH3CN):λmax(ε):220(2413)nm;ESIMS:m/z:351.13[M+Na]+。1H and13CNMR数据见表5和表6。
Cytospolide K:C15H26O4,无色油状物。-40.91(c 0.066,CHCl3);CD(CH3CN,c 2.2×10-4):λmax(Δε)=195(-10.90)nm;IR(film)vmax=3429,2927,2856,1714,1455,1375,1242,1181,1101,1029,979,916cm-1;UV(CH3CN):λmax(ε):221(1110)nm;HRMS(ESI):m/z:calcd for C15H26O4Na,293.1729;found:293.1727[M+Na]+。1H and13C NMR数据见表7。
Cytospolide L:C17H28O5,无色油状物。-75.0(c 0.012,CHCl3);CD(CH3CN,c 2.0×10-4):λmax(Δε)=196(-14.48)nm;IR(film)vmax=3358,3196,2924,2853,1731,1660,1633,1463,1374,1245,1177,1135,1099cm-1;UV(CH3CN):λmax(ε):219(1133)nm;HRMS(ESI):m/z:calcd for C17H28O5Na,335.1834;found:335.1831[M+Na]+。1H and13C NMR数据见表7。
Cytospolide M:C15H26O5,白色晶体。-25.53(c0.094,CHCl3);m.p.136-137℃;CD(CH3CN,c 5.0×10-4):λmax(Δε)=190(+2.35),214(-3.07)nm;IR(film)vmax=3346,2928,2856,1731,1665,1459,1377,1184,1131,1098,1064,992,934cm-1;UV(CH3CN):λmax(ε):219(1828)nm;HRMS(ESI):m/z:calcd for C15H26O5Na,309.1678;found:309.1677[M+Na]+。1H and13C NMR数据见表8。
Cytospolide N:C17H28O7,白色晶体。-60.0(c0.010,CHCl3);CD(CH3CN,c5.0×10-4):λmax(Δε)=207(-3.01)nm;IR(film)vmax=3359,3205,2925,2854,1733,1661,1633,1462,1371,1241,1179,1099,1059,1028,989,935cm-1;UV(CH3CN):λmax(ε):214(1130)nm;HRMS(ESI):m/z:calcd for C17H28O7Na,367.1733;found:367.1732[M+Na]+。1H and13C NMR数据见表6。
Cytospolide O:C15H24O4,白色晶体。-6.35(c0.063,CHCl3);CD(CH3CN,c 5.0×10-4):λmax(Δε)=189(-6.63),216(-1.83),296(+1.14)nm;IR(film)vmax=3359,3194,2922,2852,1658,1633,1465,1416cm-1;UV(CH3CN):λmax(ε):226(2569),251(390),278(707)nm;HRMS(ESI):m/z:calcd for C15H24O4Na,291.1572;found:291.1570[M+Na]+。1H and13C NMR数据见表9。
Cytospolide P:C17H28O6,无色油状物。-105.88(c 0.017,CHCl3)m.p.103-104℃;CD(CH3CN,c 1.0×10-3):λmax(Δε)=198(-1.94),213(-1.57),290(-0.88)nm;IR(film)vmax=3408,2926,2855,1736,1708,1669,1459,1372,1242,1073,1030,987,953,890cm-1;UV(CH3CN):λmax(ε):223(2558)nm;HRMS(ESI):m/z:calcdfor C17H28O6Na,351.1784;found:351.1787[M+Na]+。1H and13C NMR数据见表9。
表1.化合物cytospolide A和cytospolide B的核磁共振数据
表2.化合物cytospolide C和cytospolideE的核磁共振数据
表3.化合物Cytospolides D(a)和Cytospolides D(b)的核磁共振数据
表4.化合物Cytospolide F and Cytospolide G的核磁共振数据
表5.化合物Cytospolide H和Cytospolide I的核磁共振数据
表6.化合物Cytospolide J和Cytospolide N的核磁共振数据
表7.化合物Cytospolide K和Cytospolide L的核磁共振数据
表8.化合物Cytospolide M的核磁共振数据
表9.化合物Cytospolide O和Cytospolide P的核磁共振数据
经体外抗肿瘤试验表明,化合物Cytospolides A~P对HCT116(人结肠癌细胞)、A549(人肺癌细胞)、QGY-7703(人肝癌细胞)、A375(人黑色素瘤细胞)、U937(人白血病细胞)肿瘤细胞株有明显的抑制作用;经体外抗菌试验,表明化合物Cytospolides A~P对花药黑粉菌、壳针孢叶枯病菌、大肠杆菌、巨大芽孢杆菌有明显的抑菌效果,因此可用于制备抗肿瘤或抗菌药物。
本发明为研制抗肿瘤和抗菌药物提供了新的先导化合物,为开发利用植物内生菌资源具有重要意义。
具体实施方式
实施例1.制备化合物Cytospolides A~P
将18.7g内生真菌Cytospora sp.发酵物(由德国不伦瑞克大学提供)用10ml氯仿完全溶解,按常规用正相硅胶色谱(200~300目)分离,以二氯甲烷∶丙酮体积比为100∶1,80∶20,50∶50,30∶70,1∶100的洗脱液进行梯度洗脱,根据薄层板监测,按照极性的差别从小到大共收集18个部分洗脱液Fr 1~Fr18。各部分再分别通过正相硅胶、反相硅胶、Sephadex LH-20和HPLC等多种现代色谱分离技术,得16种新化合物:Cytospolide A(5.0mg)、Cytospolide B(2.4mg)、Cytospolide C(600.0mg)、Cytospolides D(9.3mg)、Cytospolide E(6.0mg)、Cytospolide F(10.0mg)、Cytospolide G(5.4mg)、Cytospolide H(0.9mg)、CytospolideI and J(6.1mg)、Cytospolide K(6.6mg)、Cytospolide L(1.7mg)、Cytospolide M(9.4mg)、Cytospolide N(1.0mg)、Cytospolide O(4.0mg)、Cytospolide P(1.0mg)。
化合物Cytospolides A~P抗肿瘤药理实验:
一、实验方法
对本发明的化合物Cytospolides A~P进行了肿瘤细胞增殖抑制试验,试验方法采用常规的MTT法。
1.实验用细胞株:HCT116(人结肠癌细胞)、A549(人肺癌细胞)、QGY-7703(人肝癌细胞)、A375(人黑色素瘤细胞)、U937(人白血病细胞),均由中国科学院细胞所提供。
2.实验试剂、耗材和仪器:
DMEM培养液、1640培养液、McCoy′s 5a、血清和胰酶(均为Invitrigen公司产品);
DMSO和MTT(sigma公司);
CCK8(日本同仁);
培养皿、移液管和96孔板(Corning公司);
CO2孵箱(SANYO公司);酶标仪(Biotek76833)
3.实验用药:
样品:化合物CytospolidesA~P由实施例1制备
阳性对照品:阿霉素(Adriamycin公司)
4.细胞培养
人结肠癌细胞(HCT116),用含有10%胎牛血清的McCoy′s 5a培养液中,37℃5%CO2条件下培养,待细胞铺满培养皿底70%-80%后,用0.25%的胰酶进行消化,调整细胞密度至105个/ml,以每孔100μl接种于96孔板中,于18-24h后进行实验。
人肺腺癌细胞(A549)和人黑色素瘤细胞(A375)均用含有10%胎牛血清的DMEM培养液中,37℃5%CO2条件下培养,待细胞铺满培养皿底70%-80%后,用0.25%的胰酶进行消化,调整细胞密度至105个/ml,以每孔100μl接种于96孔板中,于18-24h后进行实验。
人肝癌细胞(QGY-7703),用含有10%胎牛血清的1640培养液中,37℃5%CO2条件下培养,待细胞铺满培养皿底70%-80%后,用0.25%的胰酶进行消化,调整细胞密度至105个/ml,以每孔100μl接种于96孔板中,于18-24h后进行实验。
人白血病细胞(U937),用含有10%胎牛血清的1640培养液中,37℃5%CO2条件下培养,待细胞达到106个/ml左右时,1000rpm 5min离心、传代,调整细胞密度至105个/ml,以每孔100μl接种于96孔板中,于18-24h后进行实验。5.细胞活力检测实验
HCT116、A549、A375和QGY-7703细胞活力检测实验:于实验前24h以104个/孔的细胞浓度接种96孔板。每孔分别给药1μl,终浓度分别达到30ug/ml和3μg/ml,同时设立复孔、DMSO对照和阿霉素(0.4μg/ml)阳性对照。给药后,37℃5%CO2条件下共孵育24h。每孔加入10μl 5mg/ml MTT(噻唑蓝),37℃5%CO2条件下共孵育4h。吸去培养板中的细胞培养液。每孔加入150μl DMSO溶液,于37℃下摇床震荡15min。用酶标仪检测570nm下的OD值。
U937细胞活力检测实验:于实验前24h以104个/孔的细胞浓度接种96孔板。每孔分别给药1μl,终浓度分别达到30μg/ml和3μg/ml,同时设立复孔、DMSO对照和阿霉素(0.4μg/ml)阳性对照。给药后,37℃5%CO2条件下共孵育24h。向每孔加入10ml的CCK-8溶液,37℃5%CO2条件下共孵育2h。用酶标仪检测450nm下的OD值。
二、实验结果
通过MTT法测定化合物Cytospolides A~P体外细胞毒活性,各化合物的肿瘤细胞抑制率见表10。
表10.化合物Cytospolides A~P的肿瘤细胞增殖抑制试验a
a样品浓度为3μg/ml,阿霉素浓度为0.4μg/ml。抑制率单位为%。
Cytospolides A~P抗菌药理实验
一、实验方法
对本发明化合物Cytospolides A~P进行了体外抗菌试验,试验方法采用琼脂扩散试验法。
1.实验用菌
真菌:花药黑粉菌(Microbotryum violaceum)、壳针孢叶枯病菌(Septoria tritici)
细菌:大肠杆菌(Escherichia coli)、巨大芽孢杆菌(Bacillus megaterium)
2.实验用药
样品:化合物1~16(Cytospolides A~P)由实施例1制备
阳性对照药:青霉素、链霉素、酮康唑
阴性对照品:丙酮
3.实验步骤
将青霉素、链霉素、酮康唑和化合物Cytospolides A~P分别用丙酮配制成浓度为1mg/ml的溶液,单次测试用量50μl。将上述3种真菌、2种细菌和1种藻类按无菌操作的要求分别用7ml灭菌水配制成菌液,各用喷雾器取4ml菌液,分别均匀喷洒于各自培养皿的培养基表面,再在每个培养皿内分别放置直径约1cm灭菌滤纸两块,覆盖于培养基表面,然后分别取上述配制的药液50μl滴于滤纸上,盖上培养基盖子进行培养。各培养皿盖子上均注明相应培养基种类、菌种、化合物名称、接种时间。花药黑粉菌室温4天,壳针孢叶枯病菌20℃4天,大肠杆菌37℃24小时,巨大芽孢杆菌37℃24小时。按时观察结果,测量抑菌圈的大小(直径),平行试验3次,结果见表11。
表11.琼脂扩散实验活性筛选(mm)
由表10可见,化合物6对HCT116(人结肠癌细胞)有明显的抑制作用;化合物4、6、11、13、14、16对A549(人肺癌细胞)有明显的抑制作用;化合物12对A375(人黑色素瘤细胞)有一定的抑制作用。
由表11可见,化合物5对花药黑粉菌有明显的抑制作用;化合物4、11、12对大肠杆菌有明显的抑制作用;化合物15对巨大芽孢杆菌有明显的抑制作用。
上述活性实验结果表明,本发明化合物Cytospolides A~P具有较好的抗肿瘤活性和抗菌活性,故可用于制备抗肿瘤和抗菌药物。本发明为深入研究和开发新的抗肿瘤和抗菌药物开辟了新的途径。
Claims (2)
1.十元环内酯类化合物Cytospolides A~P,其特征在于化学结构通式如下:
16种化合物Cytospolides A~P的基团搭配分别如下:
2.权利要求1所述的十元环内酯类化合物Cytospolides A~P在制备抗肿瘤药物或抗菌药物中的应用。
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US10144719B1 (en) | 2015-07-27 | 2018-12-04 | University Of South Florida | Antimicrobials from an epigenetics based fungal metabolite screening program |
CN109180635A (zh) * | 2018-09-21 | 2019-01-11 | 中南民族大学 | 化合物e1011及其制备方法与应用、马铃薯内生真菌的发酵产物及其乙酸乙酯萃取液 |
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US10144719B1 (en) | 2015-07-27 | 2018-12-04 | University Of South Florida | Antimicrobials from an epigenetics based fungal metabolite screening program |
CN109180635A (zh) * | 2018-09-21 | 2019-01-11 | 中南民族大学 | 化合物e1011及其制备方法与应用、马铃薯内生真菌的发酵产物及其乙酸乙酯萃取液 |
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