CN105147660A - 白藜芦醇低聚体在制备药物中的用途 - Google Patents
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Abstract
本发明公开了白藜芦醇低聚体或其药学上可接受的盐在制备降低脂肪酸合成酶表达量类药物或脂肪酸合成酶抑制剂类药物中的用途。本发明还公开了一种药物组合物,它是以所述的白藜芦醇低聚体或其药学上可接受的盐为活性成分,加上药学上可接受的辅料制备而成的制剂。本发明的白藜芦醇低聚体可以有效降低脂肪酸合成酶表达量,并且还能抑制脂肪酸合成酶的活性,可以作为抗肿瘤或者防治肥胖的药物,具有广泛的应用前景。
Description
技术领域
本发明涉及白藜芦醇低聚体或其药学上可接受的盐在制备降低脂肪酸合成酶表达量类药物或脂肪酸合成酶抑制剂类药物中的用途。
背景技术
脂肪酸合成酶(Fattyacidsynthase,FAS)是生物体内源性脂肪酸合成过程的关键酶,它通过催化乙酰辅酶A和丙二酰辅酶A而生成长链脂肪酸。
研究发现,在正常情况下,FAS可在肝脏和脂肪等各种组织中表达,其功能是将碳水化合物合成脂肪酸,以甘油三酯的形式储存。同时,FAS还与肥胖密切相关。这是因为FAS在人的肝脏和脂肪组织中有较高的表达,特别是在肝脏中,其脂肪酸合成能力较脂肪组织高8~9倍,同时其表达水平受摄食成分和激素水平的影响,含碳水化合物的饮食通过刺激FAS的高表达诱导脂肪的生成。
已有研究发现,在乳腺癌、结直肠癌、前列腺癌、卵巢癌、子宫内膜癌等组织中的FAS表达远高于正常组织。进一步的研究证明,抑制FAS的表达或者活性,可以有效控制肿瘤细胞的增生或诱导其凋亡。
因此,抑制FAS的表达或者活性对于抑制内源性脂肪酸的生物合成,进而有效控制肿瘤、肥胖及各种相关代谢综合症等的发生、发展有着重要的意义(徐晓伟等,脂肪酸合成酶抑制剂的研究进展,国际药学研究杂志,2009年4月第36卷第2期,第105-120页;赵励彦等,脂肪酸合成酶抑制剂减肥作用机制的研究进展,中国药理学通报,2006,22(7),第780-784页)。
白藜芦醇(resveratrol)是存在于多种植物中的一种二苯乙烯化合物,其结构如下所示:
白藜芦醇分子结构中含有酚羟基和一个双键,相互之间易发生羟基间缩合脱水或双键加成,从而形成二聚体至多聚体。例如:
ε-viniferin是一种白藜芦醇的二聚体,其结构如下所示:
vitisinA是一种白藜芦醇的四聚体,其结构如下所示:
vitisinB是一种白藜芦醇的四聚体,其结构如下所示:
目前已有研究报道,白藜芦醇的二聚体或多聚体具有多种药理活性。其中,对于白藜芦醇的低聚体,已有抗菌、抗病毒、抗氧化、镇痛等活性的报道。
例如,叶勇等人报道了白藜芦醇低聚体具有一定的镇痛活性,同时发现,二、三聚体的活性优于四聚体(叶勇等,白藜芦醇低聚体对Fos/Jun分子作用的虚拟分析及其镇痛活性,中国新药杂志2014年第23卷第1期,第80-85页)。
目前,尚未有白藜芦醇低聚体抑制FAS的表达或者活性的报道。
发明内容
本发明提供了白藜芦醇低聚体或其药学上可接受的盐在制备降低脂肪酸合成酶表达量类药物或脂肪酸合成酶抑制剂类药物中的用途。
优选地,所述白藜芦醇低聚体是白藜芦醇二聚体或白藜芦醇四聚体。
优选地,所述白藜芦醇低聚体选自vitisinA、vitisinB和ε-viniferin中的任一种:
优选地,所述药物是抗肿瘤药物或防治代谢综合征的药物。
进一步优选地,所述抗肿瘤药物是治疗乳腺癌、结直肠癌、前列腺癌、卵巢癌或子宫内膜癌的药物。
进一步优选地,所述防治代谢综合征的药物是防治肥胖或肥胖并发症的药物;更进一步优选地,所述防治肥胖或肥胖并发症的药物是防治非胰岛素依赖型糖尿病、高血压或冠状动脉栓塞的药物。
本发明还提供了一种药物组合物,它是以上述的白藜芦醇低聚体或其药学上可接受的盐为活性成分,加上药学上可接受的辅料制备而成的制剂。
本发明还提供了所述的药物组合物在制备降低脂肪酸合成酶表达量类药物或脂肪酸合成酶抑制剂类药物中的用途。
优选地,所述药物是抗肿瘤药物或防治代谢综合征的药物;进一步优选地,所述抗肿瘤药物是治疗乳腺癌、结直肠癌、前列腺癌、卵巢癌或子宫内膜癌的药物。
优选地,所述防治代谢综合征的药物是防治肥胖或肥胖并发症的药物;进一步优选地,所述防治肥胖或肥胖并发症的药物是防治非胰岛素依赖型糖尿病、高血压或冠状动脉栓塞的药物。
本发明的实验结果显示,本发明的白藜芦醇低聚体可以有效降低脂肪酸合成酶表达量,并且还能抑制脂肪酸合成酶的活性,可以作为抗肿瘤或者防治肥胖的药物,具有广泛的应用前景。
在本发明的含义之内,“防治”表示预防和/或治疗。
在本发明的含义之内,“治疗”也包括复发性(relapse)预防或阶段性(phase)预防,以及急性或慢性体征、症状和/或功能失常的治疗。治疗可以是对症治疗,例如抑制症状。它可以在短期内实现,在中期内调整,或者可以说是长期治疗,例如在维持疗法里面。
显然,根据本发明的上述内容,按照本领域的普通技术知识和惯用手段,在不脱离本发明上述基本技术思想前提下,还可以做出其它多种形式的修改、替换或变更。
以下通过实施例形式的具体实施方式,对本发明的上述内容再作进一步的详细说明。但不应将此理解为本发明上述主题的范围仅限于以下的实例。凡基于本发明上述内容所实现的技术均属于本发明的范围。
附图说明
图1为本发明化合物的抑制细胞活力试验结果;
图2为本发明化合物的抑制FAS表达量试验结果;
图3为本发明化合物的抑制细胞内FAS试验结果;
图4为vitisinA在不同浓度下的抑制FAS活性试验结果;
图5为ε-viniferin在不同浓度下的抑制FAS活性试验结果;
图6为vitisinB在不同浓度下的抑制FAS活性试验结果。
具体实施方式
实施例1本发明vitisinA、ε-viniferin、vitisinB的制备
本实施例所用仪器与试剂如下所示:
TBE-300C高速逆流色谱仪(上海同田生物技术有限公司);同时配有TBP5002恒流泵(上海同田生物技术有限公司),DC-0506低温恒温槽(上海舜宇恒平科学仪器有限公司),UV-2000D检测器(上海同田生物技术有限公司)和EasyChrom-1000色谱数据工作站(上海同田生物技术有限公司)。Agilent1260高效液相色谱仪(安捷伦公司),配有G1311C四级泵,G1329B自动进样器,G1316A柱温箱和G1315D二极管阵列检测器。
本实施例中采用HPLC法对各流分进行纯度检测(峰面积归一法)其色谱条件为:EclipseXDBC18柱(250mm×4.6mm,5μm);流动相:甲醇-乙腈-水溶液;梯度洗脱程序具体如下:0-20min,流动相为30-50%的甲醇,的5%-5%乙腈;21-35min,流动相为50-65%的甲醇,5%-5%乙腈;流速:1.0ml/min;柱温箱温度为30℃;检测波长为325nm。
(1)将马蔺子粉碎后,用85%乙醇提取3次,过滤,减压浓缩回收溶剂后得到乙醇粗提物,即待分离样品
(2)将含有正己烷、乙酸乙酯、甲醇和水的有机溶剂体系混合均匀后静置分层,分别取上层溶剂和下层溶剂,超声脱气20min,以上层溶剂作为固定相,下层溶剂作为流动相,向高速逆流色谱仪的分离管中泵入所述固定相,保持分离管温度25℃,以900rpm的转速正转20min后,泵入流动相,待体系平衡后,从进样阀进样,并以1.5ml/min的流速进行高速逆流色谱分离,检测波长为325nm,依次接收流分1,流分II和流分2,减压浓缩干燥至恒重,得到高纯度的vitisinA(流分1)和ε-viniferin(流分2),其中流分II为一组混合物;其中正己烷、乙酸乙酯、甲醇和水的体积比为3:6.5:4.2:5.5;流分1,流分II和流分2的出峰时间依次为60~80min、115~135min、140~155min;
(3)取流分II,采用高速逆流色谱进行分离,分离方法如下:将含有石油醚、乙酸乙酯、甲醇和水的有机溶剂体系混合均匀后静置分层,分别取上层溶剂和下层溶剂,超声脱气20min,以下层溶剂作为固定相,上4层溶剂作为流动相,向高速逆流色谱仪的分离管中泵入所述固定相,保持分离管温度35℃,以800rpm的转速正转20min后,泵入流动相,待体系平衡后,从进样阀进样,并以3.5ml/min的流速进行高速逆流色谱分离,检测波长为325nm,依次接收流分4和流分3,减压浓缩干燥至恒重,得到高纯度的vitisinC(流分4)和vitisinB(流分3);其中石油醚、乙酸乙酯、甲醇和水的体积比为5:5:3:6;流分4和流分3的出峰时间依次为135~142min和145~155min。
实施例2本发明化合物的药效试验
材料:
乳腺癌细胞株MDA-MB-231,vitisinA、ε-viniferin、vitisinB通实施例1中的方法制备得到。
乙酰辅酶A、丙二酸单酰辅酶A、还原型烟酰胺腺嘌呤二核苷酸磷酸(Triphosphopyridinenucleotide,NADPH)购自美国Sigma公司;
CellCountingKit购自日本同仁化学;
Dulbecco’smodifiedEagle’smedium(DMEM)和青霉素,链霉素购自美国Invitrogen公司;
FAS和β-actin单克隆抗体购自美国CellSignalingTechnology(CST)公司;
辣根过氧化物酶标记山羊抗鼠二抗购自中杉金桥生物技术公司;
ECL发光液和聚偏二氟乙烯膜(PolyvinylideneFluoride,PVDF)膜、胎牛血清(Fetaibovineserum)购自浙江天航生物技术有限公司(北京);
其他化学试剂购自北京试剂厂。
1.抑制细胞活力试验
MDA-MB-231细胞均匀得接种在直径微微10cm的培养皿中培养至80%-90%,传代于96孔板,每孔约104个细胞,置于37℃,5%CO2恒温细胞培养箱中培育24h后,分别加入不同浓度的化合物处理,每个处理6个平行,于细胞培养箱中处理24h。弃培养基,加入含有体积比为1/10的CCK-8的无血清培养基,37℃孵育1-4h,于450nm处测吸光度。未有细胞的孔为空白对照,有细胞却没有加药的孔为实验对照。试验结果如图1所示。
结果显示,vitisinA、ε-viniferin、vitisinB均可使乳腺癌细MDA-MB-231的细胞活力下降,说明白藜芦醇低聚体对肿瘤细胞具有抑制作用。其中,四聚体vitisinB无论高低浓度,抑制效果均十分明显。
2.抑制FAS表达量试验
将细胞均匀的铺于六孔板中,待细胞融合至80%-90%,移去培养基,分别加入不同浓度的药物的无血清培养基于恒温培养箱中24h。后用预冷的PBS洗两遍,加入200-300μLRIPA裂解液于冰上裂解细胞,5-10min后收集细胞裂解液,12000rpm、4℃离心15min,取上清。用BCA试剂盒测蛋白浓度,通过计算,补入PBS或裂解液,将各样品的总蛋白浓度调至一致。按比例加入5×Loadingbuffer(含DTT),95℃加热10min,即可进行SDS-PAGE电泳分离蛋白,后将蛋白转到PVDF膜上。电转后的膜用5%(w/v)脱脂奶粉的TBST溶液(封闭液)4℃封闭2h,根据一抗说明书用封闭液稀释一抗,于4℃杂交过夜。经过处理的膜经TBST清洗3次,每次10min,用二抗室温杂交1h后,用ECL发光法检测定免疫反应条带,并以β-actin作为内参,并比较目的蛋白含量。试验结果如图2所示。
结果显示,经vitisinA处理的MDA-MB-231细胞在4和8μg/mL处的FAS表达量显著下降;ε-viniferin在2μg/mL处表达量降低;而vitisinB处理过的细胞随着浓度的增加,FAS的表达量逐渐降低。
可见,本发明的化合物均具有降低FAS表达量的效果。
3.抑制细胞内FAS试验
将细胞均匀的铺于六孔板中,待细胞融合至80%-90%,移去培养基,分别加入含不同浓度化合物的无血清培养基于恒温培养箱中24h。用预冷的PBS洗两遍。用含有0.6mMPMSF的FAS测活缓冲液在冰上超声破碎细胞(超声2秒,间歇5秒,5-10个循环),于4℃12000g离心30min,取上清,以该裂解上清代替FAS酶溶液进行活性测定。500μL的测活体系其中含有25mMKH2PO4-K2HPO4测活缓冲液,0.25mMEDTA,0.25mMDTT,30μM乙酰辅酶A,100μM丙二酸单酰辅酶A,350μMNADPH(pH7.0),及20μL离心后的上清液。采用BCA法测定蛋白浓度,FAS的活性以U/mg计算。每个样品重复测定2-5次,每组由3个或以上的样本组成。试验结果如图3所示
结果显示,vitisinA、ε-viniferin、vitisinB均能在一定程度上,而vitisinB处理过的细胞FAS活力逐渐降低,且具有剂量的依赖性。
4、抑制FAS活性试验
FAS自鸡肝中提取(保存于-80℃),测活反应体系为100mMKH2PO4-K2HPO4测活缓冲液,pH7.0;1mMEDTA,1mMDTT,3μM乙酰辅酶A,10μM丙二酸单酰辅酶A,35μMNADPH(pH7.0),反应总体系为2ml;分别加入不同浓度的三种化合物,并补足相同体积的DMSO(化合物溶解在DMSO中),以含有不同浓度化合物的缓冲液为本底调零;测活条件为37℃恒温,加入6μgFAS启动的反应,采用岛津UV-1800紫外-可见分光光度计(日本)连续监测340nm处的吸光度变化,FAS的活性以U/mg计算。每个样品重复测定2-5次,每组由3个或以上的样本组成。
vitisinA测定了以下几个浓度:0、0.3、0.6、1、1.3、1.6、2μg/ml;
ε-viniferin测定了以下几个浓度:0、0.5、1、1.5、2、2.5、3μg/ml;
vitisinB测定了以下几个浓度:0、0.3、0.6、1、1.3、1.6、2μg/ml;
结果分别如图4-6所示。
经计算,上述三个化合物的IC50值如下:vitisinA为0.458μg/ml;ε-viniferin为2.94μg/ml;vitisinB为0.617μg/ml。
可见,本发明的化合物均表现出了显著的抑制FAS活性。其中,vitisinA和vitisinB抑制活性较强。
综上所述,本发明的白藜芦醇低聚体可以有效降低脂肪酸合成酶表达量,并且还能抑制脂肪酸合成酶的活性,可以作为抗肿瘤或者防治肥胖的药物,具有广泛的应用前景。
Claims (10)
1.白藜芦醇低聚体或其药学上可接受的盐在制备降低脂肪酸合成酶表达量类药物或脂肪酸合成酶抑制剂类药物中的用途。
2.根据权利要求1所述的用途,其特征在于:所述白藜芦醇低聚体是白藜芦醇二聚体或白藜芦醇四聚体。
3.根据权利要求1所述的用途,其特征在于:所述白藜芦醇低聚体选自vitisinA、vitisinB和ε-viniferin中的任一种:
4.根据权利要求1-3任一项所述的用途,其特征在于:所述药物是抗肿瘤药物或防治代谢综合征的药物。
5.根据权利要求4所述的用途,其特征在于:所述抗肿瘤药物是治疗乳腺癌、结直肠癌、前列腺癌、卵巢癌或子宫内膜癌的药物。
6.根据权利要求4所述的用途,其特征在于:所述防治代谢综合征的药物是防治肥胖或肥胖并发症的药物;优选地,所述防治肥胖或肥胖并发症的药物是防治非胰岛素依赖型糖尿病、高血压或冠状动脉栓塞的药物。
7.一种药物组合物,其特征在于:它是以权利要求1-3任一项所述的白藜芦醇低聚体或其药学上可接受的盐为活性成分,加上药学上可接受的辅料制备而成的制剂。
8.权利要求7所述的药物组合物在制备降低脂肪酸合成酶表达量类药物或脂肪酸合成酶抑制剂类药物中的用途。
9.根据权利要8所述的用途,其特征在于:所述药物是抗肿瘤药物或防治代谢综合征的药物;优选地,所述抗肿瘤药物是治疗乳腺癌、结直肠癌、前列腺癌、卵巢癌或子宫内膜癌的药物。
10.根据权利要求9所述的用途,其特征在于:所述防治代谢综合征的药物是防治肥胖或肥胖并发症的药物;优选地,所述防治肥胖或肥胖并发症的药物是防治非胰岛素依赖型糖尿病、高血压或冠状动脉栓塞的药物。
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CN106667994A (zh) * | 2016-12-22 | 2017-05-17 | 河南科技大学 | 低聚多酚类化合物在制备抗革兰氏阳性耐药菌产品的应用 |
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CN112236136B (zh) * | 2018-10-04 | 2023-12-01 | Ms健康科学实验室株式会社 | 改善肠道菌群的组合物 |
CN109662962A (zh) * | 2018-10-26 | 2019-04-23 | 中国科学院西北高原生物研究所 | 低聚茋类化合物的用途 |
CN109662962B (zh) * | 2018-10-26 | 2022-02-11 | 中国科学院西北高原生物研究所 | 低聚茋类化合物的用途 |
CN110590881A (zh) * | 2019-09-23 | 2019-12-20 | 中国科学院西北高原生物研究所 | 马蔺子种仁中的新低聚茋类化合物及其提取方法和用途 |
CN113521055A (zh) * | 2021-05-31 | 2021-10-22 | 中国科学院西北高原生物研究所 | 低聚茋类单体化合物VitD在制备提高动物脂肪沉积的产品中的用途 |
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