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A Microfluidic System with Surface Patterning for Investigating Cavitation Bubble(s)–Cell Interaction and the Resultant Bioeffects at the Single-cell Level
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Theoretical study of microbubble dynamics in sonoporation.

Hao Yu1, Zhongshi Lin2, Liang Xu2

  • 1Biomedical Engineering Department, Shenzhen Polytechnic, Shenzhen 518055, China.

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|May 10, 2015
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Summary

This study models ultrasound-mediated microbubble dynamics for cell membrane poration, revealing key factors governing sonoporation efficiency for drug and gene delivery.

Keywords:
Boundary element methodCell membraneMicrobubbleNumerical modelSonoporation

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Area of Science:

  • Biophysics
  • Biotechnology
  • Acoustic Medicine

Background:

  • Sonoporation utilizes ultrasound-activated microbubbles to temporarily permeabilize cell membranes, facilitating intracellular drug and gene delivery.
  • Understanding the precise mechanics of microbubble-cell membrane interactions is crucial for optimizing sonoporation efficacy.

Purpose of the Study:

  • To develop and analyze a computational model simulating ultrasound-mediated microbubble dynamics near a cell membrane.
  • To elucidate the fundamental mechanisms driving sonoporation and identify key influencing parameters.

Main Methods:

  • Utilized unsteady Bernoulli equations to determine fluid velocity potentials at the microbubble and cell membrane surfaces.
  • Employed boundary integral equations for solving the fluid dynamics model.
  • Performed numerical analysis to investigate microbubble behavior under various conditions.

Main Results:

  • Identified typical microbubble dynamics near cell membranes, primarily influenced by the mechanical index of ultrasound exposure.
  • Established quantitative relationships between ultrasound parameters, microbubble properties, and cell membrane characteristics in the sonoporation process.

Conclusions:

  • The developed model provides insights into the physics of sonoporation.
  • Findings highlight the critical role of mechanical index and offer a framework for optimizing ultrasound-based drug and gene delivery systems.