Studies on Heart. XVII. Effects of Frog Heart Inotropic Substances on Beating of Rat Myocardial Cells in Culture
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概要
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The effects of frog heart inotropic substances on beating phenomena in cultured myocardial cells of neonatal rats were investigated. The beating rate and percentage of trypsin-dissociated cells were determined in Eagle minimum essential medium (MEM) supplemented with 10% bovine serum at 2 days in culture. The attachment and the spreading of cells were observed in Eagle MEM supplemented with 0.5% bovine albumin. The positive inotropic glycoprotein, Fr. A from calf heart, and its cyanogen bromide peptide, Fr. A-1,significantly increased the beating rate and percentage of single cells in their dosages to be effective on frog heart assay as well as epinephrine. Another positive inotropic lipoprotein, Fr. I-B from calf thymus, also increased the rate, but did not effect on the percentage like acetylcholine. Negative inotropic dipeptide, anserine, decreased the rate but not the percentage of single cells. In the beating rate of cell-cluster, Fr. A, Fr. A-1 and Fr. I-B showed accelerating effects in their concentrations of 10^<-8>M, 10^<-7>M and 10^<-9>M, respectively. The effect of Fr. I-B on cell-cluster was transitory 5 to 20 min after sample addition, and those of Fr. A and Fr. A-1 were relatively continuous up to 40 min. The chronotropic actions on cell-cluster by these three samples were not affected by the addition of propranolol. Fr. A significantly increased the attached cells and Fr. I-B greatly decreased the spreading cells, but both of them did not promote the spreading process of myocardial cells in their doses of improving the beating properties.
- 公益社団法人日本薬学会の論文
- 1978-03-25
著者
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青沼 繁
Faculty of Pharmaceutical Sciences of Kinki University
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小浜 靖弘
Faculty of Pharmaceutical Sciences, Osaka University
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小浜 靖弘
大阪大学薬学部
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青沼 繁
Faculty Of Pharmaceutical Sciences Osaka University
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赤井 邦久
Faculty of Pharmaceutical Sciences, Osaka University
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藤岡 みどり
Faculty of Pharmaceutical Sciences, Osaka University
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赤井 邦久
Faculty Of Pharmaceutical Sciences Osaka University
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藤岡 みどり
Faculty Of Pharmaceutical Sciences Osaka University
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