Fibered Confocal Fluorescence Microscopy (Cell-viZio™) Facilitates Extended Imaging in the Field of Microcirculation
Laemmel E.a · Genet M.b · Le Goualher G.b · Perchant A.b · Le Gargasson J.-F.c · Vicaut E.a
A Comparison with Intravital Microscopy
aLaboratoire d’Etude de la Microcirculation, Université Paris 7, bMauna Kea Technologies, et cLaboratoire de Physiopathologie cellulaire et moléculaire de la Rétine, INSERM U592, Paris, France
Eric Vicaut, MD, PhD
Laboratoire d’Etude de la Microcirculation
10 avenue de Verdun
FR–75010 Paris (France)
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This study investigated the capability of fibered confocal fluorescence microscopy (FCFM) to provide in vivo microvascular observations. FCFM is specifically designed for in vivo in situ observation thanks to a probe composed of a fiber bundle and micro-optics having a diameter as small as 650 µm. In the first part of the study, we compared the main characteristics of FCFM with those of intravital fluorescence microscopy (IFM). A mouse cremaster preparation was used as a common basis to allow for imaging with both modalities. We discussed the feasibility of obtaining quantitative measurements usually provided by IFM in the context of FCFM: morphometry, capillary permeability, functional capillary density, vasoconstriction and dilation effects. In addition, the possibility to visualize fluorescent red blood cells or leukocytes was also evaluated. Phototoxicity issues and limitations of FCFM were also discussed. We showed that FCFM allows observations and measurements usually provided by IFM and that the real-time capability of the system, as well as the flexibility and small diameter of the optical probe enable micro-invasiveness and can extend imaging capabilities for in vivo in situ observations when compared to IFM.
© 2004 S. Karger AG, Basel
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