title: A new model for the research into rhythmic contraction activity of cardiomyocytes in vitro.
abstract: Heart cells continue to contract rhythmically after isolation and in culture in vitro. We describe a model of heart preparation in vitro that permits quantitative research on the frequency of contractions of cardiomyocytes. The chick embryo heart explants placed on a network of elastic glass fibers continued beating for months, recorded and analyzed with the methods of computer-assisted image analysis. The efficacy of this experimental model for the screening of effects of various agents on the frequency of contractions was examined by following the effects of nifedipine, caffeine, ethanol, and benzamide. The reversibility of the effects and the reproducibility of results were demonstrated quantitatively. The significance of a mechanical elastic load provided by glass fibers for the preservation of long-lasting contractile activity of cardiomyocytes is discussed and the common occurrence of oscillatory contraction processes in various eucaryotic cells is noted.
authors.affiliation: Department of Cell Biology, Jagiellonian University, Kraków, Poland.
authors.forename: W
authors.initials: W
authors.lastname: Korohoda
authors.forename: A
authors.initials: A
authors.lastname: Jurkiewicz
authors.forename: I
authors.initials: I
authors.lastname: Figiel
authors.forename: J
authors.initials: J
authors.lastname: Czyz
mesh_terms: D000818:Animals; D001549:Benzamides / Q000494:pharmacology; D002110:Caffeine / Q000494:pharmacology; D002491:Central Nervous System Agents / Q000494:pharmacology; D002642:Chick Embryo; D004353:Drug Evaluation, Preclinical; D000431:Ethanol / Q000494:pharmacology; D006321:Heart / Q000187:drug effects / Q000196:embryology / Q000502:physiology*; D066298:In Vitro Techniques; D008954:Models, Biological; D009119:Muscle Contraction / Q000187:drug effects / Q000502:physiology*; D009206:Myocardium / Q000166:cytology; D010507:Periodicity; D015203:Reproducibility of Results
chemical_list: D001549:Benzamides; D002491:Central Nervous System Agents; D002110:Caffeine; D000431:Ethanol; C037689:benzamide