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Related Experiment Videos

Multi-photon excitation microscopy in intact animals.

Emily C Rothstein1, Michael Nauman, Scott Chesnick

  • 1Laboratory of Cardiac Energetics, National Heart, Lung and Blood Institute, National Institutes of Health, Department of Human Health Services, Bethesda, MD 20892, USA. emilyr@nih.gov

Journal of Microscopy
|June 1, 2006
PubMed
Summary

This study presents a stable microscopy system for imaging subcellular events in living animals using two-photon excitation fluorescence and second harmonic generation microscopy. The optimized setup minimizes motion artifacts, enabling high-quality imaging in various organs.

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Area of Science:

  • Biomedical Optics
  • Microscopy Techniques
  • In Vivo Imaging

Background:

  • Traditional microscopy has limitations for in vivo subcellular imaging in live animals.
  • Optimizing microscope geometry, motion control, and optical coupling is crucial for advanced imaging modalities.

Purpose of the Study:

  • To develop and validate a stable microscopy system for in vivo imaging of living animals.
  • To enable high-resolution subcellular investigations using two-photon excitation fluorescence and second harmonic generation microscopy.

Main Methods:

  • A modified inverted LSM510 microscope was adapted with a rotating periscope for an upright format.
  • A water immersion objective was coupled to tissue via saline or transparent gel.
  • A specialized animal holder with ventilation was designed to minimize motion.

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Main Results:

  • The system successfully acquired quality images from peripheral and body cavity organs in living animals.
  • The setup facilitated imaging of endogenous reduced nicotinamide adenine dinucleotide and exogenous dyes.
  • Micrometer-scale motion remains a significant challenge for physiological studies.

Conclusions:

  • The developed microscopy system provides a stable platform for advanced in vivo imaging in rodents.
  • Further strategies for motion compensation are necessary to enhance physiological study capabilities.
  • This approach advances the potential for subcellular event investigation in living organisms.