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Subcellular imaging in the live mouse.

Robert M Hoffman1, Meng Yang

  • 1AntiCancer Inc., 7917 Ostrow Street, San Diego, California 92111, USA. all@anticancer.com

Nature Protocols
|April 5, 2007
PubMed
Summary
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This study details a method for in vivo imaging of cancer cells in live mice using dual-color fluorescent proteins. Researchers can now visualize subcellular details of cancer cell behavior, including trafficking and mitosis.

Area of Science:

  • Molecular Biology
  • Biotechnology
  • Cancer Research

Background:

  • Fluorescent proteins offer high brightness and quantum yield for in vivo imaging.
  • Subcellular resolution in live animals is crucial for understanding complex biological processes.

Purpose of the Study:

  • To develop a protocol for dual-color fluorescent labeling of cancer cells in live mice.
  • To enable high-resolution, subcellular imaging of cancer cell dynamics.

Main Methods:

  • Cancer cells were labeled with green fluorescent protein (GFP) in the nucleus (linked to histone H2B) and red fluorescent protein (RFP) in the cytoplasm (via retroviral vector).
  • Double-labeled cells were injected into live mice.
  • High-resolution microscopy with reversible skin flaps facilitated subcellular imaging.

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Main Results:

  • The protocol allows for clear visualization of dual-color labeled cancer cells at the subcellular level in live mice.
  • Imaging captured various cellular events, including trafficking, deformation, extravasation, mitosis, and cell death.

Conclusions:

  • This method provides a powerful tool for studying cancer cell behavior in vivo with unprecedented detail.
  • The protocol enables the observation of dynamic cellular processes critical to cancer progression and metastasis.