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Yuji Nashimoto1, Yukako Teraoka1, Ramin Banan Sadeghian1

  • 1Department of Micro Engineering, Kyoto University.

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Researchers developed a novel microfluidic method to create perfusable vascular networks within spheroids. This breakthrough supports long-term spheroid culture for better tissue modeling and drug development.

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Area of Science:

  • Biotechnology
  • Tissue Engineering
  • Microfluidics

Background:

  • Spheroids are valuable models for human tissues.
  • Long-term spheroid culture is limited by the lack of perfusable vascular networks.
  • Developing functional vascularization is crucial for spheroid applications.

Purpose of the Study:

  • To present a novel method for integrating a perfusable vascular network into spheroids using microfluidics.
  • To overcome the challenge of vascularization in spheroid cultures for enhanced functionality.
  • To create a platform that mimics in vivo conditions for spheroid development.

Main Methods:

  • Utilized a microfluidic device to guide angiogenic sprouts towards a spheroid.
  • Employed angiogenic factors from human lung fibroblasts within the spheroid to attract sprouts.
  • Co-cultured endothelial cells within the spheroid to facilitate vascular network formation.
  • Integrated microchannels with the spheroid for sprout connection.

Main Results:

  • Successfully induced angiogenic sprouts to connect with the spheroid.
  • Formed a continuous and perfusable vascular network within the spheroid.
  • Demonstrated successful perfusion of the spheroid interior without leakage.
  • Established a functional vascular network mimicking in vivo blood circulation.

Conclusions:

  • The novel method enables the creation of perfusable vascular networks in spheroids.
  • This technique provides a new platform for advanced spheroid culture.
  • The developed vascularized spheroids can better recapitulate living tissues for research and development.