CN111228277A - 20(R)-25-羟基-达玛烷型-3β,12β,20-三醇的药物用途 - Google Patents

20(R)-25-羟基-达玛烷型-3β,12β,20-三醇的药物用途 Download PDF

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CN111228277A
CN111228277A CN202010168179.7A CN202010168179A CN111228277A CN 111228277 A CN111228277 A CN 111228277A CN 202010168179 A CN202010168179 A CN 202010168179A CN 111228277 A CN111228277 A CN 111228277A
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刘丽萍
张庆镐
李丹
赵余庆
曹瑀莹
杜丙秀
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Abstract

本发明涉及医药技术领域,具体是20(R)‑25‑羟基‑达玛烷型‑3β,12β,20‑三醇的药物用途。本发明提供的药物用途是20(R)‑25‑羟基‑达玛烷型‑3β,12β,20‑三醇在制备治疗和预防心率失常药物中的应用。20(R)‑25‑羟基‑达玛烷型‑3β,12β,20‑三醇对快速型心律失常具有抑制作用。

Description

20(R)-25-羟基-达玛烷型-3β,12β,20-三醇的药物用途
技术领域
本发明涉及医药技术领域,具体是20(R)-25-羟基-达玛烷型-3β,12β,20-三醇的药物用途。
背景技术
心律失常是心血管系统最常见的病症之一,它可突然发作而致猝死,亦可持续累及心脏而致其衰竭。近几年来,抗心律失常西药在临床应用的安全性不断被质疑,很多药物本身存在局限性及副作用,且有致心律失常作用。因此,纯天然、毒副作用小的中医药治疗心律失常的独特优势越来越被人们重视。
20(R)-25-羟基-达玛烷型-3β,12β,20-三醇(20(R)-25-OH-PPD,20(R)–dammarane-3β,12β,20,25-tetrol),简称AD2,是新近从人参茎叶中发现和提取的具有高活性的新型原人参二醇。现已证明,AD2可抑制胰腺癌、肺癌、乳腺癌等癌细胞增殖,诱导细胞凋亡,具有抗癌特性。此外,AD2还可通过氧化应激损伤途径保护高糖条件下的肾小球系膜细胞。目前关于AD2对心律失常的研究还未见报道。
发明内容
本发明的目的是提供20(R)-25-羟基-达玛烷型-3β,12β,20-三醇的药物用途。
为实现上述发明目的,本发明采用以下技术方案:
本发明提供了20(R)-25-羟基-达玛烷型-3β,12β,20-三醇在制备治疗心率失常药物中的应用。所述20(R)-25-羟基-达玛烷型-3β,12β,20-三醇(AD2)的结构式如下:
Figure BDA0002408207490000011
本发明提供了上述20(R)-25-羟基-达玛烷型-3β,12β,20-三醇在制备预防心率失常药物中的应用。
优选地,所述心律失常为快速型心律失常。
本发明的有益效果:本发明提供了20(R)-25-羟基-达玛烷型-3β,12β,20-三醇的新的医药用途,其具有抑制快速型心律失常的作用,且对正常心肌无影响,为开发和探索低毒、高效、多靶点的抗心律失常中药提供了药物基础。
附图说明
图1 64通道矩阵式电生理监测系统;图中,A.32通道电极,B.两个电极共64个通道分别贴在心外膜表面,C.64个通道电极在左右心室上对应的位置,D.各个通道的动作电位激活时间,E.根据D图中每个通道的单个激活时间进行色彩分级,最深的红色代表最早的激活,最深的蓝色代表最近的激活,右侧柱子色彩分级代表激活时间,左心室(LV)最早的激活点在64通道位置,最后的激活在37通道位置,动作电位由右下部向左上部方向传导,传导时间为1.94mm/ms;
图2实施例1中实验流程图;
图3不同实验组的心率图;
图4 Iso诱导离体灌流大鼠的动作电位传导图和心电图;a.对照组,b.Iso诱导心律失常组;
图5 AD2预处理后大鼠的动作电位传导图和心电图;a.对照组,b.AD2预处理;c.在AD2存在下,再灌流Iso;
图6对心率失常大鼠以AD2处理后大鼠的动作电位传导图和心电图;a.对照组,b.Iso诱导心律失常组;c.Iso诱导后灌流AD25uM,d.Iso诱导后灌流AD210uM;
图7对正常大鼠以AD2处理后大鼠的动作电位传导图和心电图;a.对照组,b.灌流AD2组。
具体实施方式
以下结合具体实施例对本发明作进一步说明,但不以任何方式限制本发明。
实验材料:本实验中所用的AD2由沈阳药科大学功能食品和葡萄酒学院提供;
Wistar大鼠:购自大连医科大学实验动物中心。
实验设备:64通道电极(EMS64-USB-1003,MappingLab,美国)
构建的模型:以异丙肾上腺素(Isoprenaline,Iso)进行快速型心律失常模型构建,实验动物采用Wistar大鼠,取其离体心脏进行灌流,采用64通道矩阵式电生理监测系统,实时观测AD2对Iso诱导离体大鼠快速型心律失常各项指标(心率、动作电位传导方向、传导速度及心电图)的影响。心脏被固定到langendorff灌流装置上,将两个32通道电极阵列覆盖左右心室外表面,连接到64通道矩阵式电生理监测系统上,对心脏电位进行多点同步标测(图1)。
实验过程见实验流程图(图2):心脏搏动稳定25min后,开始记录。
实验分组:对照组:心脏灌流Krebs-Ringer缓冲液;
Iso诱导心律失常模型组:心脏灌流Iso0.5μM;
药物预防组:先灌流AD25μM,再灌流Iso 0.5μM;
药物治疗组:先灌流Iso 0.5μM,再灌流AD25μM/AD210μM;
AD2单独处理组:心脏灌流AD2
实验过程中实时记录心率、传导速度和传导方向等指标。
根据以上实验设计,我们利用64通道矩阵式电生理标测技术(Mapping技术),监测Iso诱导离体大鼠快速型心律失常模型的电生理信息,测量AD2对心率、传导速度和传导方向的变化影响。
图3是不同实验组的心率图,由图3可以看出,窦性节律时,Iso给药会使心脏心率加快;预加5μMAD2药物,对Iso引起的心脏节律加快具有抑制效果;单独给予AD2,未观察到对心脏节律的明显作用。AD2对Iso诱发的快速心率具有逆转作用。
图4是Iso诱导离体灌流大鼠的动作电位传导图和心电图,本实验记录了左右心室64个通道mapping地图。图中最深的红色代表最早的激活,最深的蓝色代表最后的激活,箭头代表动作电位传导方向。对照组,从左心室最早的激活点到最后的激活点传导时间为1.46mm/ms,和对照组比较Iso诱导模型组传导加快,传导方向改变,心率明显增加,心电图呈现明显心律失常,这也说明Iso诱导离体灌流大鼠快速型心律失常的模型构建成功。
图5是AD2预处理后大鼠的动作电位传导图和心电图;和对照组比较,AD2预处理5min,传导方向没有改变,传导速度略微减慢,在AD2存在下,灌流Iso 5min,传导方向没有明显变化,传导速度稍有减慢,但不明显。心电图没有明显异常。以上结果显示:AD25μM明显逆转Iso所致心肌传导方向的改变,抑制Iso诱导快速型心律失常的发生。AD2预处理后对Iso所致离体灌流大鼠快速型心律失常具有抑制作用。
图6是对心率失常大鼠以AD2处理后大鼠的动作电位传导图和心电图;待心脏搏动稳定后,首先灌流Iso 5min,然后在Iso存在下,先后灌流AD25μM和AD210μM各5min,观察AD2对Iso诱导心律失常的抑制作用。结果显示,灌流Iso,心率明显增加,传导短时间内迅速增快,传导方向改变,心电图呈现明显心律失常;而灌流AD25μM和AD210μM明显逆转了Iso诱导的心律失常作用。AD2对Iso所致离体灌流大鼠快速型心律失常具有抑制作用。
图7是对正常大鼠以AD2处理后大鼠的动作电位传导图和心电图采用AD25μM单独灌流心脏。结果显示,与对照组相比,无论是传导速度、传导方向、心率以及心电图,单独灌流AD2的实验组基本没有变化。AD2对正常离体灌流大鼠心室肌电生理功能没有影响。
综上,心律失常是指心律起源部位、心搏频率与节律以及冲动传导等任一项异常,本实验利用离体大鼠灌流心脏,采用Iso造模,观察AD2对心律失常大鼠心室肌心律起源部位、心率及传导等指标的影响,结果显示,AD2预处理与后处理,都可明显逆转Iso诱导心律失常模型组大鼠心室肌传导加快、传导方向改变、心率明显增加、心电图呈现明显异常等现象。因此,20(R)-25-羟基-达玛烷型-3β,12β,20-三醇具有预防和治疗快速型心律失常作用。

Claims (3)

1.20(R)-25-羟基-达玛烷型-3β,12β,20-三醇在制备治疗心率失常药物中的应用。
2.20(R)-25-羟基-达玛烷型-3β,12β,20-三醇在制备预防心率失常药物中的应用。
3.根据权利要求1或2所述的应用,其特征在于,所述心率失常为快速型心率失常。
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Cited By (1)

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CN115364115A (zh) * 2022-06-24 2022-11-22 新乡医学院第一附属医院 红景天苷在制备干预缺血再灌注心律失常的药物中的应用

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US20080234208A1 (en) * 2005-07-14 2008-09-25 National Institute Of Pharmaceutical R&D Co., Ltd Medical Composition Containing Ginseng Secondary Glycosides, Its Preparation Method and Application
CN104586860A (zh) * 2013-11-01 2015-05-06 中国科学院上海药物研究所 达玛烷型三萜衍生物的用途
CN104666309A (zh) * 2013-11-29 2015-06-03 沈阳药科大学 达玛烷型皂苷元抗肝纤维化的医药用途
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115364115A (zh) * 2022-06-24 2022-11-22 新乡医学院第一附属医院 红景天苷在制备干预缺血再灌注心律失常的药物中的应用

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