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• W3206639596 abstract "Tebuconazole (TEB) is an important fungicide that belongs to the triazole family. It is largely applied in agriculture and its use has increased in the last decade. Since TEB is stable in water and soil, long-term exposure of humans to this pesticide is a real threat. Acute toxicological studies to uncover the toxicity of TEB are limited, and there is evidence of an association between long-term exposure to TEB and damage of several biological systems, including hepatotoxicity and cardiotoxicity. In this paper, the effects of acute exposure of cardiomyocytes and murine hearts to TEB were addressed to elucidate its impact on electromechanical properties of the cardiac tissue. In whole-cell patch-clamp records, TEB inhibited both the total outward potassium current (IC50=5.7±1.5 μmol.l−1) and the L-type calcium current (IC50=33.2±7.4 μmol.l−1). Acute exposure to TEB at 30 μmol.l−1 prolonged the action potential duration as well as an induced out-of-pace action potential, and increased the sodium/calcium exchanger current in its forward and reverse modes. Moreover, sarcomere shortening and calcium transient in isolated cardiomyocytes was enhanced when cells were exposed to TEB at 30 μmol.l−1. In ex vivo experiments, TEB 30 μmol.l−1 caused significant electrocardiogram remodeling with prolonged PR, QRS, and QT interval duration. Accordingly, TEB exposure was prone to the appearance of arrhythmias. Combined, our results demonstrate that acute TEB exposure affects the cardiomyocyte's electro-contractile properties and triggers the appearance of ECG abnormalities, including conduction defects and arrhythmias." @default.
• W3206639596 created "2021-10-25" @default.
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• W3206639596 date "2021-10-13" @default.
• W3206639596 modified "2023-10-16" @default.
• W3206639596 title "The fungicide Tebuconazole induces electromechanical cardiotoxicity in murine hearts" @default.
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• W3206639596 doi "https://doi.org/10.1101/2021.10.13.464222" @default.
• W3206639596 hasPublicationYear "2021" @default.
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