Page 63 - 2019年10月第30卷第19期
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苗药黑骨藤醇提物乙酸乙酯部位对离体蛙心功能的影响 Δ
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杨婉珠 ,刘育辰 ,杨 虹 ,刘 刚 ,王 迪(1.贵州中医药大学药学院,贵阳 550025;2.贵州中医药大学
1*
基础医学院,贵阳 550025)
中图分类号 R285.5 文献标志码 A 文章编号 1001-0408(2019)19-2650-06
DOI 10.6039/j.issn.1001-0408.2019.19.12
摘 要 目的:研究黑骨藤醇提物乙酸乙酯部位对离体蛙心功能的影响,并对其可能的作用机制进行初步考察。方法:采用斯氏
蛙心插管法制备离体蛙心标本,分别用任氏液(空白对照)和质量浓度为1.74、3.48 mg/mL的黑骨藤醇提物乙酸乙酯部位进行灌
流,用BL-420生物机能实验系统记录离体心脏的心率和心肌收缩力变化,以考察黑骨藤醇提物乙酸乙酯部位对离体蛙心功能的
影响。先分别用10 mg/L的阿托品、异丙肾上腺素20 µL或1 µL低钙(每1 000 mL纯水中含CaCl2 0.06 g)、高钙(每1 000 mL纯水
中含CaCl2 0.24 g)任氏液进行灌流,然后再分别加入1.74 mg/mL的黑骨藤醇提物乙酸乙酯部位,用BL-420生物机能实验系统记
录离体心脏的心肌收缩力变化;并取用任氏液(空白对照)和质量浓度为1.74、3.48 mg/mL的黑骨藤醇提物乙酸乙酯部位灌流后的
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心肌组织,测定其中Na -K -ATP酶、Ca -Mg -ATP酶和乙酰胆碱酯酶(AChE)活性,以考察黑骨藤醇提物乙酸乙酯部位影响心脏
功能的可能作用机制。结果:加入质量浓度为1.74、3.48 mg/mL黑骨藤醇提物乙酸乙酯部位后,蛙心的心肌平均收缩力较空白对
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照明显降低(P<0.001),但心率的变化不明显(P>0.05)。随着细胞外Ca 浓度的逐渐增大,黑骨藤醇提物乙酸乙酯部位对离体蛙
心收缩的抑制作用也逐渐增大;加入阿托品、异丙肾上腺素后,黑骨藤醇提物乙酸乙酯部位对离体蛙心收缩的抑制作用有所降低;
经过 1.74、3.48 mg/mL 黑骨藤醇提物乙酸乙酯部位灌流后的蛙心心肌组织中 Na -K -ATP 酶活性较空白对照改变不明显(P>
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0.05),但Ca -Mg -ATP酶活性明显升高(P<0.05)、AChE活性明显降低(P<0.05)。结论:黑骨藤醇提物乙酸乙酯部位可抑制离
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体蛙心的收缩活动,具有一定的负性肌力作用;其作用机制可能与提高心肌组织中Ca -Mg -ATP酶活性,抑制AChE活性,同时阻
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断细胞膜上Ca 通道,兴奋M受体和阻断β受体有关。
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关键词 苗药;黑骨藤醇提物;乙酸乙酯部位;离体蛙心;心肌收缩力
Effects of Ethyl Acetate Part from Ethanol Extract of Miao Medicine Periploca forrestii on Cardiac Function
of Isolated Frog Heart
YANG Wanzhu ,LIU Yuchen ,YANG Hong 1,2 ,LIU Gang ,WANG Di (1.College of Pharmacy,Guizhou
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University of TCM,Guiyang 550025,China;2.College of Basic Medicine,Guizhou University of TCM,
Guiyang 550025,China)
ABSTRACT OBJECTIVE:To study the effects of ethyl acetate part form the ethanol extract of Periploca forrestii on cardiac
function of isolated frog heart,and to primarily investigate its potential mechanism. METHODS:The isolated frog heart samples
were prepared by using the intube method of steinmann. The Ren’s solution(blank control),1.70 mg/mL and 3.48 mg/mL ethyl
acetate part from ethanol extract of P. forrestii were used to perfuse the sample. The BL-420 biological function experimental system
was used to record the changes in heart rate and myocardial contractility. The effects of ethyl acetate part from ethanol extract of
P. forrestii on cardiac function of isolated frog heart were investigated. After perfused with 10 mg/L atropine,20 µL isoproterenol,
1 µL low calcium(per 1 000 mL pure water contain 0.06 g CaCl2 ),high calcium Ren’s solution(per 1 000 mL pure water contain
0.24 g CaCl2 ),adding 1.74 mg/mL ethyl acetate part from ethanol extract of P. forrestii,the changes of myocardial contractility in
isolated hearts were recorded by BL-420 biological function
Δ 基 金 项 目 :国 家 自 然 科 学 基 金 资 助 项 目(No.81860700,
experimental system. Myocardial tissue was collected after
No.81560618,No.U1812403);贵州省科技厅合作计划项目(No.黔科合
perfused with Ren’s solution(blank control)and ethyl acetate
LH 字〔2015〕7279 号);贵州省科学技术厅-中药现代化科技产业研究
开发专项项目(No.黔科合ZY字〔2013〕3003号);贵州省中医药管理局 part from ethanol extract of P. forrestii with 1.74 and 3.48
+
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中医药、民族医药科学技术研究课题(No.QZYY2017-114);贵州省国 mg/mL. The activity of Na -K -ATPase,Ca -Mg -ATPase and
内一流建设学科项目(No.黔教科研发〔2017〕85 号);贵阳中医学院科 AChE were detected to investigate the potential mechanism of
研项目(No. 贵中医科院内〔2017〕90号) the effects of ethyl acetate extract from ethanol extract of
*硕士研究生。研究方向:中药及民族药化学及中药新药。 P. forrestii on cardiac function. RESULTS: Compared with
E-mail:1585443523@qq.com
blank control,mean myocardial contractility was significantly
# 通信作者:副教授,硕士生导师,博士。研究方向:中药及民族
decreased (P<0.001) after adding 1.74,3.48 mg/mL ethyl
药资源分类鉴定与质量控制。E-mail:790441561@qq.com
·2650 · China Pharmacy 2019 Vol. 30 No. 19 中国药房 2019年第30卷第19期