Restoration of vision III: soma swelling dynamics predicts neuronal death or survival after optic nerve crush in vivo.

Abstract:

:Predicting neuron death or survival after axonal injury is important in neurotrauma research. We now used in vivo confocal neuroimaging microscopy to repeatedly visualize retinal ganglion cells after optic nerve crush and studied their morphological alterations and ultimate fate. An intracollicular injection of a retrograde fluorescent tracer was made before or after optic nerve crush. Retinal ganglion cell sizes were then determined at different time points up to post-surgery day 75. Cell death was inevitable when soma swelling was fast and massive (86% above baseline or higher), but when it was slower and moderate (32% above baseline) long-term neuron survival could be predicted with high accuracy as early as post-operative day 5. Moderate swelling continued until day 15 (64%) and after about 3 weeks these cells started shrinking again, as a sign of recovery. We propose that moderate soma swelling is an adaptive rather than pathogenic post-traumatic reaction to axonal injury.

journal_name

Neuroreport

journal_title

Neuroreport

authors

Rousseau V,Engelmann R,Sabel BA

doi

10.1097/00001756-199911080-00024

subject

Has Abstract

pub_date

1999-11-08 00:00:00

pages

3387-91

issue

16

eissn

0959-4965

issn

1473-558X

journal_volume

10

pub_type

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