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Related Experiment Videos

Polymeric nanoparticles for protein kinase activity.

Jong-Ho Kim1, Seulki Lee, Kwangmeyung Kim

  • 1Biomedical Research Center, Korea Institute of Science and Technology, 39-1 Hawolgok-dong, Seongbuk-gu, Seoul 136-791, South Korea.

Chemical Communications (Cambridge, England)
|March 23, 2007
PubMed
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Novel nanoparticles utilizing poly-ion complexes enable high-throughput screening for kinase inhibitors. Phosphorylation triggers nanoparticle dissociation, releasing a detectable signal for drug discovery applications.

Area of Science:

  • Biotechnology
  • Nanomedicine
  • Chemical Biology

Background:

  • Kinase inhibitors are crucial for drug discovery.
  • Developing efficient screening methods for kinase inhibitors is essential.
  • Poly-ion complexes offer versatile platforms for developing novel diagnostic and therapeutic tools.

Purpose of the Study:

  • To develop a novel nanoparticle-based system for high-throughput screening of kinase inhibitors.
  • To utilize Förster resonance energy transfer (FRET) within poly-ion complexes for signal generation.
  • To demonstrate the utility of these nanoparticles in drug discovery.

Main Methods:

  • Preparation of poly-ion complex nanoparticles incorporating polyethyleneimine-fluorescein isothiocyanate (PEI-FITC) conjugated with a protein kinase A-specific substrate (kemptide) and poly-acrylic acid-tetramethylrhodamine (PAA-TRITC).

Related Experiment Videos

  • Induction of intermolecular FRET between FITC and TRITC within the nanoparticles.
  • Dissociation of nanoparticles triggered by phosphorylation.
  • Detection of released FITC intensity as a signal.

    • Main Results:

    • The prepared poly-ion complex nanoparticles exhibited intermolecular FRET.
    • Nanoparticle dissociation upon phosphorylation resulted in a strong FITC signal.
    • The system demonstrated potential for high-throughput screening applications.

    Conclusions:

    • Phosphorylation-triggered dissociation of FRET-containing poly-ion complex nanoparticles provides a sensitive detection method.
    • This approach is suitable for high-throughput screening of large chemical libraries.
    • The developed nanoparticles represent a promising tool for the discovery of kinase inhibitors.