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Related Experiment Video

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Recombinant protein-stabilized monodisperse microbubbles with tunable size using a valve-based microfluidic device.

Francesco E Angilè1, Kevin B Vargo, Chandra M Sehgal

  • 1Department of Chemical and Biomolecular Engineering and ‡Department of Bioengineering, School of Engineering and Applied Science, University of Pennsylvania , Philadelphia, Pennsylvania 19104, United States.

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Summary

Researchers developed a new method to create uniform microbubbles for enhanced ultrasound imaging and therapy. This technique combines microfluidics and protein engineering for stable, functionalizable, and precisely sized microbubbles.

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Area of Science:

  • Biomedical Engineering
  • Materials Science
  • Ultrasound Technology

Background:

  • Microbubbles are crucial contrast agents in ultrasound sonography.
  • They also show promise as theranostic agents for combined diagnostics and therapy.
  • Conventional methods produce polydisperse microbubbles, limiting their effectiveness.

Purpose of the Study:

  • To develop a method for generating monodisperse and functionalizable microbubbles.
  • To overcome limitations of conventional microbubble production for improved ultrasound applications.

Main Methods:

  • Utilized a microfluidic device with an air-actuated membrane valve for precise microbubble generation.
  • Employed recombinant protein technology, specifically using the amphiphilic protein oleosin for stabilization.
  • Controlled microbubble size by dynamically adjusting channel dimensions.

Main Results:

  • Successfully generated monodisperse microbubbles with a narrow size distribution.
  • Demonstrated precise control over microbubble size via the microfluidic device.
  • Showcased the stability and echogenicity of protein-shelled microbubbles under ultrasound.

Conclusions:

  • The combination of microfluidics and recombinant protein technology offers a versatile platform for producing functionalized microbubbles.
  • These monodisperse, stable, and echogenic microbubbles are promising for advanced ultrasound-related diagnostics and therapeutics.