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- W2904263934 abstract "Microbubbles in combination with ultrasound provide a new and promising way to deliver drugs into living cells. It is believed that the stable vibration or the collapse of the bubbles under ultrasound are the two main mechanisms that induce the formation of pores in the cell membranes, through which drugs may get inside the cell cytoplasm. The bubble collapse hypothesis is not only intuitive since released shock waves can easily penetrate and create pores in the membrane, but it is also confirmed by both experiment and theory. In contrast, the molecular mechanism of stable vibration is not well-understood because of experimental difficulties resulting from the fragility of bubbles and the lack of molecular dynamics simulation studies. To obtain a better understanding of this mechanism, we developed a lipid-coated bubble model that we applied to simulate the stable cavitation of the bubble in the presence of a lipid bilayer. We show that the wall shear stress generated by the bubble vibration does not induce the membrane pore formation. Instead, the bubble fuses with the membrane and subsequent cavitation pulls lipid molecules out of the membrane, creating pores. This could help one to choose the best combination of the bubble shell materials, the ultrasound frequency, and intensity, so that the opening and closing of pores will be optimized." @default.
- W2904263934 created "2018-12-22" @default.
- W2904263934 creator A5019636088 @default.
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- W2904263934 date "2018-12-12" @default.
- W2904263934 modified "2023-10-17" @default.
- W2904263934 title "Molecular Mechanism of the Cell Membrane Pore Formation Induced by Bubble Stable Cavitation" @default.
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- W2904263934 doi "https://doi.org/10.1021/acs.jpcb.8b09391" @default.
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- W2904263934 hasPublicationYear "2018" @default.
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