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Near-infrared upconversion controls photocaged cell adhesion.

Wen Li1, Jiasi Wang, Jinsong Ren

  • 1Division of Biological Inorganic Chemistry, State Key Laboratory of Rare Earth Resource Utilization, Laboratory of Chemical Biology, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences , Changchun, Jilin 130022, China.

Journal of the American Chemical Society
|January 29, 2014
PubMed
Summary

Researchers developed a new method for controlling cell adhesion using near-infrared (NIR) light and upconversion nanoparticles (UCNPs). This technique allows for precise, deep-tissue manipulation of cell interactions for regenerative medicine applications.

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Area of Science:

  • Biomaterials Science
  • Regenerative Medicine
  • Nanotechnology

Background:

  • Dynamic control of cell-surface interactions is crucial for regenerative medicine and cell-based therapies.
  • Existing methods for light-based cell manipulation often lack deep-tissue penetration or precise control.

Purpose of the Study:

  • To develop a programmable substrate for near-infrared (NIR) light-controlled cell adhesion.
  • To demonstrate the feasibility of deep-tissue photocontrol of cell adhesion using upconversion nanoparticles (UCNPs).

Main Methods:

  • Utilized upconversion nanoparticles (UCNPs) integrated into a substrate.
  • Employed NIR light to activate UCNPs, generating localized UV light.
  • Used UV light to cleave photocaged linkers, enabling controlled cell release.

Main Results:

  • Successfully achieved NIR-controlled cell adhesion and release using the UCNP-based substrate.
  • Demonstrated the capability for deep-tissue photocontrol of cell adhesion.
  • Validated the on-demand release of adhesive cells.

Conclusions:

  • The developed UCNP-based substrate enables dynamic, NIR-controlled cell adhesion.
  • This strategy offers a new approach for deep-tissue manipulation of cell-matrix and cell-cell interactions.
  • Potential applications in regenerative medicine and advanced cell-based therapies.