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Journal of Biomedical Optics

Changes induced by peripheral nerve injury in the morphology and nanomechanics of sensory neurons
Author(s): Ouafa Benzina; Vivian Szabo; Olivier Lucas; Mari-Belle Saab; Thierry Cloitre; Frédérique Scamps; Csilla Gergely; Marta Martin
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Paper Abstract

Peripheral nerve injury in vivo promotes a regenerative growth in vitro characterized by an improved neurite regrowth. Knowledge of the conditioning injury effects on both morphology and mechanical properties of live sensory neurons could be instrumental to understand the cellular and molecular mechanisms leading to this regenerative growth. In the present study, we use differential interference contrast microscopy, fluorescence microscopy, and atomic force microscopy (AFM) to show that conditioned axotomy, induced by sciatic nerve injury, does not increase somatic size of sensory neurons from adult mice lumbar dorsal root ganglia but promotes the appearance of longer and larger neurites and growth cones. AFM on live neurons is also employed to investigate changes in morphology and membrane mechanical properties of somas of conditioned neurons following sciatic nerve injury. Mechanical analysis of the soma allows distinguishing neurons having a regenerative growth from control ones, although they show similar shapes and sizes.

Paper Details

Date Published: 28 October 2013
PDF: 7 pages
J. Biomed. Opt. 18(10) 106014 doi: 10.1117/1.JBO.18.10.106014
Published in: Journal of Biomedical Optics Volume 18, Issue 10
Show Author Affiliations
Ouafa Benzina, Univ. Montpellier 2 (France)
Vivian Szabo, Univ. Montpellier 2 (France)
Olivier Lucas, INSERM (France)
Mari-Belle Saab, Univ. Montpellier 2 (France)
Thierry Cloitre, Univ. Montpellier 2 (France)
Frédérique Scamps, INSERM (France)
Csilla Gergely, Univ. Montpellier 2 (France)
Marta Martin, Univ. Montpellier 2 (France)

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