Frieß, Johannes L. ; Heselich, Anja ; Ritter, Sylvia ; Haber, Angelina ; Kaiser, Nicole ; Layer, Paul G. ; Thielemann, Christiane (2015)
Electrophysiologic and cellular characteristics of cardiomyocytes after X-ray irradiation.
In: Mutation research, 777
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
The aim of this study was to investigate possible effects of ionizing irradiation on the electrophysiological functionality of cardiac myocytes in vitro. Primary chicken cardiomyocytes with spontaneous beating activity were irradiated with X-rays (dose range of 0.5-7Gy). Functional alterations of cardiac cell cultures were evaluated up to 7 days after irradiation using microelectrode arrays. As examined endpoints, cell proliferation, apoptosis, reactive oxygen species (ROS) and DNA damage were evaluated. The beat rate of the cardiac networks increased in a dose-dependent manner over one week. The duration of single action potentials was slightly shortened. Additionally, we observed lower numbers of mitotic and S-phase cells at certain time points after irradiation. Also, the number of cells with γH2AX foci increased as a function of the dose. No significant changes in the level of ROS were detected. Induction of apoptosis was generally negligibly low. This is the first report to directly show alterations in cardiac electrophysiology caused by ionizing radiation, which were detectable up to one week after irradiation.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2015 |
| Autor(en): | Frieß, Johannes L. ; Heselich, Anja ; Ritter, Sylvia ; Haber, Angelina ; Kaiser, Nicole ; Layer, Paul G. ; Thielemann, Christiane |
| Art des Eintrags: | Bibliographie |
| Titel: | Electrophysiologic and cellular characteristics of cardiomyocytes after X-ray irradiation. |
| Sprache: | Englisch |
| Publikationsjahr: | 2015 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Mutation research |
| Jahrgang/Volume einer Zeitschrift: | 777 |
| Kurzbeschreibung (Abstract): | The aim of this study was to investigate possible effects of ionizing irradiation on the electrophysiological functionality of cardiac myocytes in vitro. Primary chicken cardiomyocytes with spontaneous beating activity were irradiated with X-rays (dose range of 0.5-7Gy). Functional alterations of cardiac cell cultures were evaluated up to 7 days after irradiation using microelectrode arrays. As examined endpoints, cell proliferation, apoptosis, reactive oxygen species (ROS) and DNA damage were evaluated. The beat rate of the cardiac networks increased in a dose-dependent manner over one week. The duration of single action potentials was slightly shortened. Additionally, we observed lower numbers of mitotic and S-phase cells at certain time points after irradiation. Also, the number of cells with γH2AX foci increased as a function of the dose. No significant changes in the level of ROS were detected. Induction of apoptosis was generally negligibly low. This is the first report to directly show alterations in cardiac electrophysiology caused by ionizing radiation, which were detectable up to one week after irradiation. |
| Fachbereich(e)/-gebiet(e): | 10 Fachbereich Biologie 10 Fachbereich Biologie > Developmental Biology and Neurogenetics |
| Hinterlegungsdatum: | 06 Mai 2015 06:25 |
| Letzte Änderung: | 06 Mai 2015 06:25 |
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