Fig. 1

Effect of tentacle extract (TE) from jellyfish Cyanea capillata on intracellular Ca²⁺ concentration in adult mouse cardiomyocytes. Intracellular Ca²⁺ concentration was recorded using the Ca²⁺ indicator Fluo-4 AM and frame scanning mode by laser scanning confocal microscope. a. The representative fluorescent Ca²⁺ scanning images of cardiomyocytes affected by 60 μg/ml TE within 10 min under 1.8 mM Ca²⁺ extracellular solution and Ca²⁺-free condition. b. The traces of F/F0 values after TE administration under 1.8 mM extracellular Ca²⁺ or Ca²⁺ free condition. Data are shown by mean ± SD (n = 6)