CN101653447A - 三七中原人参二醇型皂苷在制备抗动脉粥样硬化药物中的应用 - Google Patents
三七中原人参二醇型皂苷在制备抗动脉粥样硬化药物中的应用 Download PDFInfo
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- CN101653447A CN101653447A CN200910139993A CN200910139993A CN101653447A CN 101653447 A CN101653447 A CN 101653447A CN 200910139993 A CN200910139993 A CN 200910139993A CN 200910139993 A CN200910139993 A CN 200910139993A CN 101653447 A CN101653447 A CN 101653447A
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Abstract
本发明公开了中药三七中原人参二醇型皂苷在制备抗动脉粥样硬化药物的应用,通过实验证明,三七中原人参二醇型皂苷能够有效对抗血管炎症,明显降低血清总胆固醇含量,提高血清中HDL,舒张血管,降低动脉粥样硬化指数,是一种很有潜力的抗动脉粥样硬化药物。
Description
技术领域
本发明涉及医药技术领域,具体是中药三七中的原人参二醇型皂苷在制备抗动脉粥样硬化药物的应用。
背景技术
近年来,随着我国经济的发展,心脑血管疾病的发病率和死亡率逐年增加,已被称为危害人类健康和生命的头号杀手。动脉粥样硬化(Atherosclerosis,AS)为多种心脑血管疾病的病理基础,主要累及大中动脉,可导致心、脑等多个重要器官的组织缺血和坏死,引发心肌梗死、脑梗塞等。动脉粥样硬化是一个复杂的过程,包括内皮损伤,低密度脂蛋白(LDL)氧化修饰,单核细胞黏附,平滑肌细胞增殖及纤维斑块形成。在多种危险因素(高血压、高脂血症、糖尿病、衰老、病毒、吸烟和酗酒等)的作用下,动脉内皮损伤坏死剥脱,产生和释放各种细胞粘附分子和生长因子并在它们的作用下,血小板和单核细胞在该处粘附,进而单核细胞进入内皮下间隙转化为巨噬细胞;中膜平滑肌细胞移行至内膜,并大量增殖或凋亡;巨噬细胞和平滑肌细胞摄取胆固醇转化为泡沫细胞,形成AS的早期病变即脂纹。在此基础上,逐步发展为由坏死细胞碎片、胆固醇及其酯、血管平滑肌、巨噬细胞、T-淋巴细胞以及致密的纤维组织构成的纤维斑块。斑块形成后不稳定因素导致纤维帽破裂,形成血管堵塞,淤滞等。
三七为五加科人参属植物三七(Panax notoginseng(Burk.)F.H.Chen)的干燥根,有散瘀止痛,消肿定痛的功效。现代药理学表明,三七对血液系统、心血管系统、免疫系统均有不同的作用。皂苷为三七的主要活性成分,包括三七皂苷R1,人参皂苷Rb1,Rg1,Re和Rd等。通过之前的体内药理学研究已经发现三七总皂苷(PNS)为三七抗动脉粥样硬化的主要活性成分。而三七总皂苷又可进一步分为三醇型总皂苷(PTS)和二醇型总皂苷(PDS)两大类,分别以人参皂苷Rg1(ginsenoside Rg1)和人参皂苷Rb1(ginsenoside Rb1)为主要单体成分。本发明中对三七的提取物:i)总皂苷提取物(PNS);ii)人参二醇型皂苷提取物(PDS);iii)人参三醇型皂苷提取物(PTS)的抗动脉粥样硬化作用进行研究。
发明内容
本发明的目的是提供一种能从各个方面防治动脉粥样硬化的药物。
本发明的目的是这样实现的:中药三七中原人参二醇型皂苷在制备抗动脉粥样硬化药物的应用。
所述抗动脉粥样硬化包括对抗血管炎症、降低血清胆固醇含量或舒张血管中一种或以上。
中药三七中原人参二醇型皂苷在制备治疗血管炎症的药物的应用。
中药三七中原人参二醇型皂苷在制备降低血清总胆固醇含量,提高血清中高密度脂蛋白含量的药物的应用。
中药三七中原人参二醇型皂苷在制备舒张血管的药物的应用。
所述的药物剂型为医学上认可的任何一种剂型。
所述的药物剂型为粉剂、注射液、胶囊、片剂或口服液。
为系统的研究三七的抗动脉粥样硬化效果,首先比较了PNS、PTS和PDS在人冠状动脉内皮细胞(Human Coronary Artery Endothelial Cells,HCAEC)体外模型上的抗炎作用。实验采用肿瘤坏死因子α(TNF-α)刺激的HCAEC表达黏附分子,再给药保护。用细胞黏附实验观测PNS、PTS、PDS对THP-1单核细胞黏附TNF-α刺激的HCAEC的影响;用cell-ELISA检测PNS、PTS和PDS对细胞内黏附分子(ICAM-1)和细胞间黏附分子(VCAM-1)的抑制作用;另外,real-time PCR和Western Blotting用于观察PNS、PTS和PDS对ICAM-1和VCAM-1基因和蛋白表达的抑制。
另外,通过采用体内模型,观测了PNS、PTS和PDS对膳食诱导的高胆固醇血症大鼠的血脂调节作用。SD大鼠随机分为5组,正常组、模型组、PNS给药组、PTS给药组。模型组和给药组均给予富含胆固醇的饲料4周,给药组每天灌胃给一定浓度的PNS、PTS或PDS。检测血清总胆固醇(total cholesterol,TC)、甘油三酯(triglyceride,TG)、葡萄糖(Glucose)、高密度脂蛋白胆固醇(HDL-c)和低密度脂蛋白胆固醇(LDL-c)的含量。
此外还考察了PNS、PTS和PDS的血管舒张作用。实验中,苯丙肾上腺素预处理的大鼠胸主动脉环,造成血管舒张。给PNS、PTS和PDS处理后,观察它们的舒张血管作用。
附图说明
图1是三七的HPLC-ELSD图谱:(A)为混合标准品,(B)三七甲醇提取物,1为三七皂苷R1,2-11分别是人参皂苷Rg1,Re,Rf,Rb1,Rg2,Rc,Rb2,Rb3,Rd和Rg3;
图2是11种三七皂苷化学结构:1-11分别是三七皂苷R1、Rg1、Re、Rf、Rb1、Rg2、Rc、Rb2、Rb3和Rg3;Glc,β-D-glucose;Rha,α-L-rhamnose;Arap,α-L-arabinose(pyranose);Araf,α-L-arabinose(furanose);Xyl,β-D-xylose;
图3是用DS-401大孔树脂分离得到的20(S)-原人参二醇型三七皂苷和20(S)-原人参三醇型三七皂苷的HPLC图谱:1、三七皂苷R1,2-10分别是人参皂苷Rg1,Re,Rf,Rb1,Rg2,Rc,Rb2,Rb3和Rd,11为三七皂苷K;
图4是显示不同的皂苷部分和由三七分离得到的人参皂苷单体对THP-1与被TNF-α刺激的HCAEC细胞的粘附影响的图表:HCAECs用不同的皂苷部分和人参皂苷单体预处理24小时,接着再用10ng/ml的TNF-α刺激6小时,其中,以NF-κB的抑制剂PDTC作为阳性对照;数据±SEM来自3次不同的实验;与对照组比较##P<0.01;与TNF-α组比较*P<0.05,**P<0.01;
图5是显示三七皂苷及其人参皂苷对被TNF-α刺激的HCAECs的膜蛋白(a)ICAM-1和(b)VCAM-1表达的抑制作用的图表:HCAECs用特定浓度的PNS,PDS,PTS,Rb1和Rg1预处理24小时,然后加入10ng/ml的TNF-α再培养6小时;其中,PDTC作为阳性对照;数据±SEM来自3次不同的实验;与对照组比较##P<0.01;与TNF-α组比较*P<0.05,**P<0.01;
图6是显示三七皂苷部分及其人参皂苷对(a)ICAM-1和(b)VCAM-1粘附小分小子的mRNA水平的影响的图表:HCAECs先用不同浓度的PNS,PDS,PTS,人参皂苷Rb1和Rg1预处理24小时,再加入10ng/ml的TNF-α培养4小时。分离得到的总RNA量以及ICAM-1,VCAM-1与GAPDH的mRNA量用RT-PCR进行定量。GAPDH是一保守基因;数据±SEM来自3次不同的实验;与对照组比较##P<0.01;与TNF-α组比较*P<0.05,**P<0.01;
图7显示的是三七皂苷及其人参皂苷对被TNF-α刺激的HCAECs膜蛋白ICAM-1和VCAM-1表达的影响:HCAECs先用不同浓度的三七皂苷及其人参皂苷预处理24小时,再加入10ng/ml的TNF-α培养6小时;处理过后,从HCAECs中提取到的总蛋白和膜蛋白ICAM-1与VCAM-1用western blot进行分析;
图8显示的是三七皂苷及其人参皂苷对NF-κB/p65核转运的影响:HCAECs分别用300μg/ml的PNS,50μg/ml的PDS,100μg/ml的PTS,50μM的Rb1和30μM的Rg1预处理24小时,再加入10ng/ml的TNF-α培养0.5小时;通过观察有Alexa fluor 488绿色荧光标记的NF-κB/p65抗体来检测NF-κB/p65的表达(放大倍数为400);
表1是实施例3对比试验中大鼠血脂水平对比数据表;
图9是不同药物处理的胸主动脉环血管张力对乙酰胆碱的量效曲线图;数据±SEM来自4~7次不同的实验;与对照组比较**p<0.01;
图10是动脉粥样硬化指数,数据±SEM来自5~7次不同的实验;与对照组比较##p<0.01 and ###p<0.001;与高胆固醇饮食组比较***p<0.001。
具体实施方式
发明所述的含三七中原人参二醇型皂苷药物的制备可参考常规的药物配置方法,在知道了所需药物的给药剂量以后,药物的配置是本技术领域人员所熟知的。药物剂型为医学上认可的任何一种剂型,例如为粉剂、注射液、胶囊、片剂或口服液。
实施例1:三醇型总皂苷(PTS)和二醇型总皂苷(PDS)的分离鉴定
为了进一步研究三七皂苷的抗动脉粥样硬化活性成分,需对三七总皂苷进行分离。本发明提供一个能简便有效的利用大孔吸附树脂分离PNS的方法。依次用纯水,一定浓度的乙醇和高浓度的乙醇洗脱装了PNS的大孔吸附树脂分离柱,能依次得到高极性物质(如多糖、氨基酸)、PTS、PDS。
三七药材水提物或三七药材醇提物水溶部位或三七总皂苷PNS[本试验PNS购自万方(玉溪,中国云南)]经苯乙烯为骨架的大孔吸附树脂吸附后(原料与树脂比为1∶8-20;w/w),先用水或者25%以下的乙醇溶液洗脱1-3个柱体积,再用30-40%的乙醇溶液洗脱1-5个柱体积,最后用50-95%的乙醇溶液洗脱1-5个柱体积。分别回收30-40%和50-95%乙醇溶液洗脱物,即得三醇型总皂苷(PTS)和二醇型总皂苷(PDS)。Rb1和Rg1用制备液相色谱分离纯化,分离得到的三七皂苷类成分用对应的标准品比较保留时间和质谱的图谱来确认,见图1-3,PNS,PDS和PTS用Mill-Q水配置检验浓度为1mg/ml,Rb1和Rg1浓度为1μM的溶液,并用0.22μm的滤膜(Agilent Technologies)过滤。
实施例2:比较PNS,PTS和PDS在人冠状动脉内皮细胞(Human Coronary ArteryEndothelial Cells,HCAEC)体外模型上的抗炎作用
人冠状动脉内皮细胞培养人冠状动脉内皮细胞(HCAECs,from Cambrex Corporation,NJ,USA)采用EGM-2MV培养液培养,其中包含集中细胞生长必需因子(SingleQuots试剂盒,包含Hydrocortisone,hFGF,VEGF,IGF-1,Ascorbic acid,hEGF,R3-IGF-1 and GA)(Cambrex)和5%胎牛血清,培养温度37℃,培养气体含5%CO2.细胞长满视野85%~90%时可用于实验,2~6代细胞可用。THP-1细胞从美国ATCC公司购买(ATCC;Rockville,MD,USA),用RPMI-1640培养液培养(GIBCO,Grand Island,NY)其中富含10%(v/v)热灭活胎牛血清(FBS)。
细胞黏附实验(cell adhesion assay)细胞黏附实验采用被荧光染色物质Calcein-AM(10μM)染色30分钟作为标记了的THP-1细胞完成。人冠状动脉内皮细胞(5×103cells/well)于不同浓度的PNS,PDS,PTS,Rg1 and Rb1混合种于96孔板,37℃培养24小时,然后用10ng/mlTNF-α刺激6小时。然后将Calcein-AM标记了的THP-1细胞(5×103cells/well)与人冠状动脉内皮细胞共同培养30分钟。用多功能荧光读数仪(fluorescence multiwell plate reader,Wallac 1420,Germany)读数,激发光和放射光检测波长485和530nm。用PBS清洗细胞3次,以去除未黏附的THP-1细胞,并再次测量吸收值。结果如图4所示。
细胞酶联免疫荧光法实验(cell-ELISA) 人冠状动脉内皮细胞表面ICAM-1和VCAM-1Cell的表达用细胞酶联免疫荧光法检测。人冠状动脉内皮细胞(5×103cells/well)于不同浓度PNS,PDS,PTS,Rg1 and Rb1混合种于96孔板,37℃培养24小时,然后用溶解于05%FBS的10ng/ml TNF-α刺激6小时。在用冷却的PBST(含0.05%吐温-20的PBS)和80%乙醇混合液冰浴处理15分钟。加入含1%BSA的PBS减少非特异性结合。用PBST清洗3次后,在37℃下将细胞与anti-ICAM-1和anti-VCAM-1单抗混合培养1小时,再用PBST清洗后,加入过氧化物酶标记的羊抗-鼠二抗。再次用PBST清洗后,向其中加入底物显色液,在暗室中培养15分钟,最后用50μl/well的2N H2SO4终止反应。用多功能荧光读数仪在490nm下测量荧光吸收值。结果如图5所示。
RNA提取和即时聚合酶链反应(real-time PCR)分析试验 内皮细胞中总RNA提取采用试剂盒RNeasy mini Kit(QIAGEN,Valencia,CA)完成.根据说明书,在即时RT-PCR(Invitrogen Corp.,Carlsbad,CA)系统上采用SuperScript IIIFirst-strand合成系统完成,每个提取样品中将有0.7μg的mRNA被反转录成cDNA。GAPDH,VCAM-1 andICAM-1(Roche,Foster City,CA,USA)用的寡核苷酸引物和TaqMan探针由AppliedBiosystems设计和提供,通用PCR master mix从TaqMan购买,用于定量检测。所有的待测样品都依照GAPDH含量进行均一化,并重复测量三次。结果如图6所示。
Western免疫印迹法(Western blotting) 人冠状动脉内皮细胞(50×104cells/dish)于不同浓度的PNS,PDS,PTS,Rg1 and Rb1混合种于96孔板,37℃培养24小时,然后用溶解于05%FBS的10ng/ml TNF-α刺激6小时。然后将细胞用含有1%PMSF,1%蛋白酶抑制剂混合物和1%原钒酸钠的RIPA裂解液(RIPA lysis buffer,Santa Cruz,CA)裂解。在冰浴处理30分钟后,在4℃、11419×g下离心30分钟去除细胞残余物,采用BCA蛋白试剂盒(PIERCE,Rockford,IL)测量蛋白含量。将裂解物均分,上样到10%SDS-PAGE(with 5% stacking gel)并转移到PVDF膜(Bio-Rad,Hercules,CA)上。在膜上加入抗ICAM-1(1∶1000)and VCAM-1(1∶500)的单抗,再分别加入1∶7500和1∶2000稀释的辣根过氧化物酶修饰的二抗。最后按说明书加入ECL advanced检测试剂盒(Amersham,UK)显影。结果如图7所示。
免疫染色法(Immunostaining assay) 将人冠状动脉内皮细胞种于24孔板,并用80%乙醇固定10分钟。将细胞与鼠抗P65(1∶100)单抗混合室温下培养1小时,再用抗鼠IgG Alexa488抗体(1∶100)混合培养30分钟。PBS清洗3次后,再加入propidium iodide(PI)(1∶1000)混合10分钟。最后用荧光显微镜拍照并进行图形处理。结果如图8所示。
单核细胞黏附实验、cell-ELISA、real-time PCR和western blotting的结果都表明PNS、PTS和PDS都能不多程度的缓解TNF-α刺激的HCEAC的炎症反应,且PDS能比PNS和PTS更有效的对抗血管炎症。结果还表明,虽然人参皂苷Rb1是PDS的主要成分,但它的抗炎效果远远低于PDS。这提示PDS中的各个成分间可能存在协同作用。对PNS、PTS和PDS抗血管炎症作用的机制研究表明,抑制NF-κB通路是他们发挥抗炎作用的原因。这些结果表明,PNS、PTS和PDS能够不同程度对抗血管炎症,保护血管内皮细胞,从而对抗动脉粥样硬化的形成。
实施例3:采用体内模型,观测PNS,PTS和PDS对膳食诱导的高胆固醇血症大鼠的血脂调节、血管舒张作用和动脉粥样硬化指数的影响
高胆固醇是引发动脉粥样硬化及相关心血管疾病的主要危险因子之一。因此,通过采用体内模型,观测了PNS、PTS和PDS对膳食诱导的高胆固醇血症大鼠的血脂调节作用。
1 动物 SPF级健康雄性SD大鼠,220~250g,由广州中医药大学试验动物中心提供,动物合格证号:0016120。
2 药品与仪器 总胆固醇(TC)、甘油三酯(TG)、高密度脂蛋白(HDL)和低密度脂蛋白(LDL)检测试剂盒均购自北京中生北控;全自动生化仪为ALYCON。
3 动物分组与模型的建立 SD大鼠,适应环境1周后,眼眶取血,测定血脂水平,血脂水平不正常动物剔除。然后随机分为3组,每组8只。正常组给予正常饲料(蛋白质14%,脂肪10%,碳水化合物76%);模型组和治疗组给予添加有2%胆固醇、1%胆酸、5%花生油的饲料;治疗组每天灌服不同剂量PNS、PDS、PTS溶液。
4 血脂测定 4周后,禁食过夜,乙醚麻醉后心脏取血。在全自动生化仪上测定总胆固醇TC、甘油三脂TG、高密度脂蛋白HDL和低密度脂蛋白LDL,结果见表1。
5 由于血管舒张也是防治动脉粥样硬化的一重要手段,因此还考察了PNS、PTS和PDS的血管舒张作用。血管环制备及张力测定:动物放血后,迅速开胸,分离出胸主动脉,置于95%O2和5%CO2混合气预饱和的4℃K-H液中。小心剔除血管周围结缔组织,剪成3~4mm的血管环。用棉签磨擦血管环内表面去除内皮细胞,以制备内皮去除的血管环。将血管环悬挂于预置10ml K-H液的浴槽内,37℃恒温,持续通以95%O2和5%CO2混合气体。血管环静息张力2g,平衡60min,期间每15min换液一次。苯丙肾上腺素预处理大鼠胸主动脉环,造成血管舒张。给PNS、PTS和PDS处理后,观察它们的舒张血管作用。用PowerLab生物功能实验系统记录血管环张力变化。结果见图9。
结果表明,PNS、PTS和PDS均能显著降低高胆固醇膳食引起的血清胆固醇升高,提高LDL含量,降低动脉粥样硬化指数,且PNS、PDS的效果明显优于PTS。PNS、PTS和PDS也均能有效的缓解苯丙肾上腺素诱导的血管紧张。这些数据表明PNS和PDS能够降低血清胆固醇,降低动脉粥样硬化发生的危险。
结论:PDS能够有效对抗血管炎症,明显降低血清总胆固醇含量,提高血清中HDL,舒张血管,降低动脉粥样硬化指数。这些数据表明PDS能从各个方面防治动脉粥样硬化,是一种很有潜力的抗动脉粥样硬化药物。
Claims (7)
1.中药三七中原人参二醇型皂苷在制备抗动脉粥样硬化药物的应用。
2.根据权利要求1所述的中药三七中原人参二醇型皂苷在制备抗动脉粥样硬化药物的应用,其特征在于:所述抗动脉粥样硬化包括对抗血管炎症、降低血清胆固醇含量或舒张血管中一种或以上。
3.中药三七中原人参二醇型皂苷在制备治疗血管炎症的药物的应用。
4.中药三七中原人参二醇型皂苷在制备降低血清总胆固醇含量,提高血清中高密度脂蛋白含量的药物的应用。
5.中药三七中原人参二醇型皂苷在制备舒张血管的药物的应用。
6.根据权利要求1-5中任一权利要求所述的中药三七中原人参二醇型皂苷的应用,其特征在于:所述的药物剂型为医学上认可的任何一种剂型。
7.根据权利要求1-5中任一权利要求所述的中药三七中原人参二醇型皂苷的应用,其特征在于:所述的药物剂型为粉剂、注射液、胶囊、片剂或口服液。
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CN108309999A (zh) * | 2018-05-04 | 2018-07-24 | 南方医科大学 | 一种防治动脉粥样硬化的药物组合物 |
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