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Polymer Microarrays for High Throughput Discovery of Biomaterials
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Selective cell retrieval method using light-responsive gas-generating polymer-based microarrays.

Hidetaka Ueno1, Yoshinori Akagi2, Shohei Yamamura1

  • 1Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 2217-14 Hayashi-cho, Takamatsu, Kagawa 761-0395, Japan. yamamura-s@aist.go.jp.

Lab on a Chip
|March 21, 2022
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Summary

This study introduces a novel light-responsive gas-generating polymer (LGP) microarray for selective cell retrieval. This method allows for easy, rapid, and damage-free isolation of single cells, crucial for cell analysis and regenerative medicine.

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Area of Science:

  • Biotechnology
  • Materials Science
  • Cell Biology

Background:

  • Selective cell retrieval is vital for cell analysis and regenerative medicine.
  • Conventional methods like micromanipulators struggle with rapid, damage-free single-cell retrieval from adhered surfaces.
  • Current techniques face challenges in retrieving single adhered cells easily and without damage.

Purpose of the Study:

  • To develop a novel method for selective cell retrieval using light-responsive materials.
  • To demonstrate the efficacy of a light-responsive gas-generating polymer (LGP) microarray for cell isolation.
  • To enable easy, rapid, and non-damaging retrieval of single cells and cell groups.

Main Methods:

  • Fabrication of a convex LGP microarray using a molding process with polystyrene chips.
  • Utilizing the LGP microarray's ability to generate N2 gas upon specific light exposure (365 nm).
  • Applying the LGP microarray to retrieve adhered human cervical cancer cells (HeLa).

Main Results:

  • Light irradiation of the LGP microarray induced N2 gas generation, selectively releasing target HeLa cells.
  • 100% of single HeLa cells were easily and rapidly retrieved from the LGP microarray.
  • Approximately 90% of retrieved single HeLa cells maintained viability and proliferated post-retrieval.

Conclusions:

  • The LGP microarray system offers an effective solution for selective cell retrieval.
  • This novel method facilitates easy, rapid, and harmless isolation of adhered cells and single cells using light.
  • The technology holds significant potential for advancing cell analysis and regenerative medicine applications.