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Gymnodimine-A and 13-desmethyl spirolide C are marine toxins belonging to the cyclic imine group produced by Karenia selliformis and Alexandrium ostenfeldii/peruvianum dinoflagellates, respectively. The aim of this work was to analyze the pharmacological properties of both toxins (at sub-lethal doses) on neuromuscular excitability, when injected locally to isoflurane-anesthetized mice, using a multimodal...
Hyperosmotic stress promotes rapid and pronounced apoptosis in cultured cardiomyocytes. Here, we investigated if Ca2+ signals contribute to this response. Exposure of cardiomyocytes to sorbitol [600 mosmol (kg water)−1] elicited large and oscillatory intracellular Ca2+ concentration increases. These Ca2+ signals were inhibited by nifedipine, Cd2+, U73122, xestospongin C and ryanodine, suggesting contributions...
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