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Histochemistry and Cell Biology

, Volume 133, Issue 5, pp 481–491 | Cite as

Intravital microscopy: a novel tool to study cell biology in living animals

  • Roberto WeigertEmail author
  • Monika Sramkova
  • Laura Parente
  • Panomwat Amornphimoltham
  • Andrius Masedunskas
Review

Abstract

Intravital microscopy encompasses various optical microscopy techniques aimed at visualizing biological processes in live animals. In the last decade, the development of non-linear optical microscopy resulted in an enormous increase of in vivo studies, which have addressed key biological questions in fields such as neurobiology, immunology and tumor biology. Recently, few studies have shown that subcellular processes can be imaged dynamically in the live animal at a resolution comparable to that achieved in cell cultures, providing new opportunities to study cell biology under physiological conditions. The overall aim of this review is to give the reader a general idea of the potential applications of intravital microscopy with a particular emphasis on subcellular imaging. An overview of some of the most exciting studies in this field will be presented using resolution as a main organizing criterion. Indeed, first we will focus on those studies in which organs were imaged at the tissue level, then on those focusing on single cells imaging, and finally on those imaging subcellular organelles and structures.

Keywords

Intravital microscopy Non-linear microscopy Live animal imaging Membrane traffic Two-photon microscopy 

Notes

Acknowledgments

This research was supported by the Intramural Research Program of the NIH, National Institute of Dental and Craniofacial Research. We apologize to those whose work could not be cited due to space limitations. We would like to thank Dr. Silvio Gutkind, Dr. Julie Donaldson and Dr. Omayma Al-Awar for critical reading of the manuscript and all the members of the Oral and Pharyngeal Cancer Branch for invaluable assistance.

Supplementary material

418_2010_692_MOESM1_ESM.mov (9.6 mb)
Supplementary movie 1: Blood flow in the liver of a live rat. 70 kDa Texas-red dextran (red), intrinsic fluorescence (cyan). Excitation wavelength 740 nm (MOV 9831 kb)
418_2010_692_MOESM2_ESM.mov (9.4 mb)
Supplementary movie 2: Blood flow in the kidney of a live rat. 70 kDa Texas-red dextran (red), intrinsic fluorescence (green). Excitation wavelength 740 nm (MOV 9610 kb)

Supplementary movie 3: Volume rendering of the vasculature (500 kDa FITC dextran, green) and the salivary ducts in a live rat (70 kDA Texas red dextran injected into the Wharton’s duct). Excitation wavelength 920 nm (MOV 9232 kb)

Supplementary movie 4: Endocytosis of fluorescently labeled dextran in the salivary glands of live rats. The nuclei are labeled with Hoechst (blue), the vasculature with a 500 kDa FITC dextran (green) and the endosomes with 70 kDa Texas red dextran (red). Time is expressed in min:sec. Excitation wavelength 820 nm (MOV 7925 kb)

Supplementary movie 5: Fusion of lysosomes and dynamics of mitochondria. Lysosomes are labeled with Alexa 488-dextran (green) and mitochondria with the vital dye mitotracker (red). Time lapse performed in single confocal microscopy. (MOV 16306 kb)

418_2010_692_MOESM6_ESM.mov (6.5 mb)
Supplementary movie 6 – Acinar cell expressing Lifeact GFP (green) and TG38-mcherry (red). A blood vessel is highlighted by a systemic injection of 70 kDa Texas-red dextran. Excitation wavelength 930 nm. (MOV 6669 kb)

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Copyright information

© US Government 2010

Authors and Affiliations

  • Roberto Weigert
    • 1
    Email author
  • Monika Sramkova
    • 1
  • Laura Parente
    • 1
  • Panomwat Amornphimoltham
    • 1
  • Andrius Masedunskas
    • 1
  1. 1.Intracellular Membrane Trafficking Unit, Oral and Pharyngeal Cancer BranchNational Institute of Dental and Craniofacial Research, National Institutes of HealthBethesdaUSA

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