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Published in: Journal of Neuroinflammation 1/2021

Open Access 01-12-2021 | Vestibulopathy | Research

Breaking a dogma: acute anti-inflammatory treatment alters both post-lesional functional recovery and endogenous adaptive plasticity mechanisms in a rodent model of acute peripheral vestibulopathy

Authors: Nada El Mahmoudi, Guillaume Rastoldo, Emna Marouane, David Péricat, Isabelle Watabe, Alain Tonetto, Charlotte Hautefort, Christian Chabbert, Francesca Sargolini, Brahim Tighilet

Published in: Journal of Neuroinflammation | Issue 1/2021

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Abstract

Background

Due to their anti-inflammatory action, corticosteroids are the reference treatment for brain injuries and many inflammatory diseases. However, the benefits of acute corticotherapy are now being questioned, particularly in the case of acute peripheral vestibulopathies (APV), characterized by a vestibular syndrome composed of sustained spinning vertigo, spontaneous ocular nystagmus and oscillopsia, perceptual-cognitive, posturo-locomotor, and vegetative disorders. We assessed the effectiveness of acute corticotherapy, and the functional role of acute inflammation observed after sudden unilateral vestibular loss.

Methods

We used the rodent model of unilateral vestibular neurectomy, mimicking the syndrome observed in patients with APV. We treated the animals during the acute phase of the vestibular syndrome, either with placebo or methylprednisolone, an anti-inflammatory corticosteroid. At the cellular level, impacts of methylprednisolone on endogenous plasticity mechanisms were assessed through analysis of cell proliferation and survival, glial reactions, neuron’s membrane excitability, and stress marker. At the behavioral level, vestibular and posturo-locomotor functions’ recovery were assessed with appropriate qualitative and quantitative evaluations.

Results

We observed that acute treatment with methylprednisolone significantly decreases glial reactions, cell proliferation and survival. In addition, stress and excitability markers were significantly impacted by the treatment. Besides, vestibular syndrome’s intensity was enhanced, and vestibular compensation delayed under acute methylprednisolone treatment.

Conclusions

We show here, for the first time, that acute anti-inflammatory treatment alters the expression of the adaptive plasticity mechanisms in the deafferented vestibular nuclei and generates enhanced and prolonged vestibular and postural deficits. These results strongly suggest a beneficial role for acute endogenous neuroinflammation in vestibular compensation. They open the way to a change in dogma for the treatment and therapeutic management of vestibular patients.
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Metadata
Title
Breaking a dogma: acute anti-inflammatory treatment alters both post-lesional functional recovery and endogenous adaptive plasticity mechanisms in a rodent model of acute peripheral vestibulopathy
Authors
Nada El Mahmoudi
Guillaume Rastoldo
Emna Marouane
David Péricat
Isabelle Watabe
Alain Tonetto
Charlotte Hautefort
Christian Chabbert
Francesca Sargolini
Brahim Tighilet
Publication date
01-12-2021
Publisher
BioMed Central
Keyword
Vestibulopathy
Published in
Journal of Neuroinflammation / Issue 1/2021
Electronic ISSN: 1742-2094
DOI
https://doi.org/10.1186/s12974-021-02222-y

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