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Video 1. Live-cell imaging of calcium dynamics and membrane blebbing in HeLa cells upon olivetol treatment. Calcium dynamics were visualized using the fluorescent probe Fluo-4. HeLa cells were loaded with Fluo-4, washed, and then exposed to 300 µM olivetol for 1 h. Time-lapse imaging was performed at a rate of one frame per minute. Video 2. Live-cell imaging of calcium dynamics and membrane blebbing in HeLa cells under hypotonic stress. Calcium dynamics were visualized using the fluorescent probe Fluo-4. HeLa cells were loaded with Fluo-4, washed, and then exposed to hypotonic stress (OS; complete DMEM diluted 1:1 with water) for 1 h. Time-lapse imaging was performed at a rate of one frame per minute. Video 3. Live-cell imaging of plasma membrane blebbing in HeLa cells under hypotonic stress. HeLa cells were loaded with Calcein AM and then subjected to hypotonic stress for 1 h. Time-lapse imaging was performed at a rate of one frame per minute. Video 4. Live-cell imaging of plasma membrane blebbing in HeLa cells upon olivetol treatment. For live-cell imaging of membrane blebbing, HeLa cells were incubated with CF488-conjugated Concanavalin A and Hoechst 33342, followed by exposure to 300 µM olivetol for 1 h. Time-lapse imaging was performed at a rate of one frame per minute. Video 5. Live-cell imaging of plasma membrane blebbing and membrane rupture in HeLa cells upon olivetol treatment. For live-cell imaging of membrane blebbing, HeLa cells were incubated with CF488-conjugated Concanavalin A and Hoechst 33342, followed by exposure to 500 µM olivetol for 30 min. Time-lapse imaging was performed at a rate of one frame per minute. Video 6. Live-cell imaging of cell death caused by membrane rupture in HeLa cells upon olivetol treatment. HeLa cells were incubated with Calcein AM, propidium iodide (PI), and Hoechst 33342, followed by exposure to 500 µM olivetol for 40 min. Time-lapse imaging was performed at a rate of one frame per minute. Video 7. Live-cell imaging of calcium dynamics and membrane blebbing in HeLa cells upon treatment with mono-CH3-olivetol. Calcium dynamics were visualized using the fluorescent probe Fluo-4. HeLa cells were loaded with Fluo-4, washed, and then exposed to 300 µM mono-CH3-olivetol (3-butyl-5-methoxyphenol; BB0282781) for 10 min. Time-lapse imaging was performed at a rate of one frame per minute. Video 8. Live-cell imaging of calcium dynamics and membrane blebbing in HeLa cells upon treatment with di-CH3-olivetol. Calcium dynamics were visualized using the fluorescent probe Fluo-4. HeLa cells were loaded with Fluo-4, washed, and then exposed to 300 µM di-CH3-olivetol (1-butyl-3,5-dimethoxybenzene; BB0282782) for 30 min. Time-lapse imaging was performed at a rate of one frame per minute. Video 9. Live-cell imaging of calcium dynamics and membrane blebbing in HeLa cells upon ionomycin treatment. Calcium dynamics were visualized using the fluorescent probe Fluo-4. HeLa cells were loaded with Fluo-4, washed, and then exposed to 1 µM ionomycin for 30 min. Time-lapse imaging was performed at a rate of one frame per minute.