Article (Scientific journals)
Hypervulnerability to Sound Exposure through Impaired Adaptive Proliferation of Peroxisomes.
Delmaghani, Sedigheh; Defourny, Jean; Aghaie, Asadollah et al.
2015In Cell, 163 (4), p. 894-906
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Abstract :
[en] A deficiency in pejvakin, a protein of unknown function, causes a strikingly heterogeneous form of human deafness. Pejvakin-deficient (Pjvk(-/-)) mice also exhibit variable auditory phenotypes. Correlation between their hearing thresholds and the number of pups per cage suggest a possible harmful effect of pup vocalizations. Direct sound or electrical stimulation show that the cochlear sensory hair cells and auditory pathway neurons of Pjvk(-/-) mice and patients are exceptionally vulnerable to sound. Subcellular analysis revealed that pejvakin is associated with peroxisomes and required for their oxidative-stress-induced proliferation. Pjvk(-/-) cochleas display features of marked oxidative stress and impaired antioxidant defenses, and peroxisomes in Pjvk(-/-) hair cells show structural abnormalities after the onset of hearing. Noise exposure rapidly upregulates Pjvk cochlear transcription in wild-type mice and triggers peroxisome proliferation in hair cells and primary auditory neurons. Our results reveal that the antioxidant activity of peroxisomes protects the auditory system against noise-induced damage.
Disciplines :
Anatomy (cytology, histology, embryology...) & physiology
Author, co-author :
Delmaghani, Sedigheh
Defourny, Jean  ;  Université de Liège - ULiège > Département des sciences de la vie > GIGA-R : Biologie cellulaire
Aghaie, Asadollah
Beurg, Maryline
Dulon, Didier
Thelen, Nicolas  ;  Université de Liège - ULiège > Département des sciences de la vie > GIGA-R : Biologie cellulaire
Perfettini, Isabelle
Zelles, Tibor
Aller, Mate
Meyer, Anais
Emptoz, Alice
Giraudet, Fabrice
Leibovici, Michel
Dartevelle, Sylvie
Soubigou, Guillaume
Thiry, Marc  ;  Université de Liège > Département des sciences de la vie > GIGA-R : Biologie cellulaire
Vizi, E. Sylvester
Safieddine, Saaid
Hardelin, Jean-Pierre
Avan, Paul
Petit, Christine
More authors (11 more) Less
Language :
English
Title :
Hypervulnerability to Sound Exposure through Impaired Adaptive Proliferation of Peroxisomes.
Publication date :
November 2015
Journal title :
Cell
ISSN :
0092-8674
eISSN :
1097-4172
Publisher :
Cell Press, United States - Massachusetts
Volume :
163
Issue :
4
Pages :
894-906
Peer reviewed :
Peer Reviewed verified by ORBi
Commentary :
Copyright (c) 2015 Elsevier Inc. All rights reserved.
Available on ORBi :
since 04 January 2016

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