In vitro quantification by image analysis of inotropic and chronotropic effects of drugs on cultures of cardiac myocytes |
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Authors: | V. Gervais-Pingot J. J. Legrand G. Nasr D. Schoevaert |
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Affiliation: | (1) Department of In Vitro Toxicology, Biologie Servier, Gidy, 45403 Fleury les Aubrais, France;(2) Unité de Microscopie Quantitative, Hôpital Kremlin Bicêtre, 94270 Kremlin Bicêtre, France |
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Abstract: | Quantitative image analysis is used to measure the inotropic and chronotropic effects of drugs on cultured heart cells maintained at 37°C on the stage of an inverted light microscope, and sequentially superfused with control and treatment media. The beating of the cardiac myocytes is evaluated by simultaneously selecting up to eight areas, including cell edges, from digitized video image. The sizes and positions of these areas are controlled by the operator. To analyze the motion of cell edges in each area, the computer measures the shift of the mass center of pixels' grey levels. Finally, a few parameters are calculated for the eight areas and displayed graphically. In order to assess treatment effects, appropriate statistical tests are performed on the data. Image analysis is an efficient screening test for evaluating the pharmacologic or toxic effects of a substance on isolated or cultured cardiac myocytes from various species.Abbreviations MEM Minimum Essential Medium |
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Keywords: | cardiac myocytes cell culture chicken embryonic cells contractility digital image analysis |
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