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Related Experiment Videos

Visualizing protein-protein interactions in living animals.

Gary D Luker1, Vijay Sharma, David Piwnica-Worms

  • 1Department of Molecular Biology, Molecular Imaging Center, Mallinckrodt Institute of Radiology, Washington University Medical School, 510 South Kingshighway Boulevard, 63110, St. Louis, MO, USA.

Methods (San Diego, Calif.)
|January 25, 2003
PubMed
Summary

This study introduces a novel positron emission tomography (PET) imaging method to track protein-protein interactions in living mice. This technique allows researchers to study these interactions in vivo during disease and development.

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Area of Science:

  • Molecular Biology
  • Biochemistry
  • Medical Imaging

Background:

  • Existing methods for studying protein-protein interactions are limited to in vitro and cell culture settings.
  • These methods fail to capture how physiological and pathophysiological conditions in living animals regulate these interactions.
  • There is a need for in vivo methodologies to assess protein interactions within their native biological context.

Purpose of the Study:

  • To describe a methodology for detecting and quantifying protein-protein interactions in living mice.
  • To adapt an inducible two-hybrid system for positron emission tomography (PET) imaging.
  • To enable the study of protein interactions in vivo under various physiological and pathological conditions.

Main Methods:

  • Establishment of stably transfected cells expressing components of the inducible two-hybrid system.

Related Experiment Videos

  • Creation of tumor xenografts for in vivo studies.
  • Synthesis of PET radiopharmaceuticals for imaging reporter visualization.
  • Performance of microPET imaging and subsequent data analysis.

    • Main Results:

    • Successful development and implementation of a PET-based imaging system for in vivo protein-protein interaction analysis.
    • Demonstration of the methodology's capability to detect and quantify protein interactions in living animals.
    • Validation of the system for use in tumor xenograft models.

    Conclusions:

    • The described methodology enables molecular imaging of protein-protein interactions in living mice.
    • This technology facilitates the investigation of protein binding specificities during normal development and disease progression.
    • The system aids drug development by allowing direct interrogation of molecular targets within intact animals.