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Spheroid Cell Aggregation Enhanced by Enzyme-Free Ultrasound-Detached Cells.

Julien van Delft1, Chikahiro Imashiro2, Yuta Kurashina3

  • 1Department of Mechanical Engineering, Keio University, 3-14-1 Hiyoshi Kohoku-ku, Yokohama, 223-8522, Japan.

Advanced Biology
|August 5, 2025
PubMed
Summary
This summary is machine-generated.

Ultrasound detachment accelerates spheroid formation by preserving cell surface proteins, reducing aggregation time and variability. This enzyme-free method yields robust spheroids with improved cell distribution, suitable for organ engineering and drug screening.

Keywords:
3D aggregatesenzyme‐freespheroidstissue engineeringultrasound

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Area of Science:

  • Bioengineering
  • Cell Biology
  • Biomaterials Science

Background:

  • Spheroids are crucial for organ engineering, drug screening, and cancer research.
  • Spheroid formation time, limited by ECM construction, hinders large-scale applications.
  • Current enzyme-based detachment methods can affect cell surface proteins, impacting aggregation.

Purpose of the Study:

  • To investigate ultrasound detachment as an alternative to enzyme detachment for spheroid formation.
  • To evaluate the impact of enzyme-free detachment on spheroid formation time, cell aggregation, and spheroid properties.
  • To assess the therapeutic potential and robustness of spheroids formed using ultrasound detachment.

Main Methods:

  • Utilized ultrasound detachment to replace conventional enzyme-based detachment for spheroid formation.
  • Compared cell aggregation efficiency and spheroid formation time between ultrasound and enzyme detachment.
  • Assessed cell surface protein preservation and spheroid engraftment properties post-detachment.
  • Evaluated the impact on co-cultured spheroid applications, focusing on cell distribution and potential therapeutic effects.

Main Results:

  • Ultrasound detachment significantly reduced spheroid formation time and variability compared to enzyme detachment.
  • Enzyme-free detachment via ultrasound preserved cell surface proteins, enhancing intrinsic cell aggregation capabilities.
  • Spheroids formed using ultrasound detachment demonstrated successful engraftment properties in rat transplantations.
  • Co-cultured spheroids exhibited improved localized cell grouping, suggesting enhanced therapeutic potential and vascularization.

Conclusions:

  • Ultrasound detachment is a viable, enzyme-free alternative to conventional methods for spheroid production.
  • This method accelerates spheroid formation, improves robustness, and enhances cell distribution without compromising final spheroid quality.
  • The findings open new avenues for efficient and scalable spheroid generation in diverse bioengineering applications.