The Isolated Mouse Atria as a New Model for Testing Cardioactive Drugs with Special Reference to Doxorubicin (Adriamycin®)
- 1 April 1990
- journal article
- Published by Wiley in Basic & Clinical Pharmacology & Toxicology
- Vol. 66 (4), 299-302
- https://doi.org/10.1111/j.1600-0773.1990.tb00751.x
Abstract
Spontaneously beating isolated atria from mice were used as a new in vitro model to characterize the mechanism of the cardiotoxic action of the anthracycline cytostatic doxorubicin (Adriamycin). After stabilization at 28 degrees the atria showed a contractile rate and--force of 284 +/- 31 (S.D.) beats/min. and 49 +/- 6.5 mg. Doxorubicin (Dox) (10(-6)-10(-5) M) had a positive chronotropic action per se and decreased the pD2 for the chronotropic action of isoprenaline in a dose-dependent way. However only the effect of the higher concentration proved statistically significant, a concentration which also caused a marked decrease (63%) of the Emax. Pretreatment with Dox 15 mg/kg intraperitoneally 72 hr previously did not influence the pD2 but caused a significant increase in the Emax of the isoprenaline concentration response curve. The results indicate that Dox in vitro interferes with the beta-adrenoceptor function of isolated mouse atria in an unspecific way and that the subacute cardiotoxicity of Dox in mice is probably not due to interference with the beta-adrenoceptor system. Further it is concluded that isolated atria from mice may be a useful model for testing cardioactive drugs.Keywords
This publication has 10 references indexed in Scilit:
- Cardiotoxic Effects and the Influence on the β‐Adrenoceptor Function of Doxorubicin (Adriamycin®) in the RatBasic & Clinical Pharmacology & Toxicology, 1989
- Modulation of the calcium release channel of sarcoplasmic reticulum by adriamycin and other drugsCell Calcium, 1989
- Effects of three new anthracyclines and doxorubicin on the rat isolated heartJournal of Pharmacy and Pharmacology, 1987
- Effect of doxorubicin-enhanced hydrogen peroxide and hydroxyl radical formation on calcium sequestration by cardiac sarcoplasmic reticulumBiochemical and Biophysical Research Communications, 1985
- Mitochondrial membrane modifications induced by adriamycin-mediated electron transportBiochemical Pharmacology, 1983
- Indication of reduced doxorubicin-induced cardiac toxicity by additional treatment with antioxidative substancesCellular and Molecular Life Sciences, 1983
- Adriamycin cardiotoxicity: Possible pathogenic mechanismsJournal of Molecular and Cellular Cardiology, 1981
- Adriamycin: The Role of Lipid Peroxidation in Cardiac Toxicity and Tumor ResponseScience, 1977
- Alterations in DNA synthesis in cardiac tissue induced by adriamycin in vivo—Relationship to fatal toxicityBiochemical Pharmacology, 1975
- Versuche mit Acetyl-, Propionyl- und Butyrylcholin am isolierten Herzvorhofpr paratNaunyn-Schmiedebergs Archiv für experimentelle Pathologie und Pharmakologie, 1955