Syntaxin 4 is essential for hearing in human and zebrafish.
Journal
Human molecular genetics
ISSN: 1460-2083
Titre abrégé: Hum Mol Genet
Pays: England
ID NLM: 9208958
Informations de publication
Date de publication:
20 03 2023
20 03 2023
Historique:
received:
19
04
2022
revised:
22
08
2022
accepted:
11
11
2022
pubmed:
11
11
2022
medline:
22
3
2023
entrez:
10
11
2022
Statut:
ppublish
Résumé
Congenital hearing impairment (HI) is a genetically highly heterogeneous disorder in which prompt recognition and intervention are crucial to optimize outcomes. In this study, we used exome sequencing to investigate a large consanguineous Pakistani family with eight affected individuals showing bilateral severe-to-profound HI. This identified a homozygous splice region variant in STX4 (c.232 + 6T>C), which causes exon skipping and a frameshift, that segregated with HI (two-point logarithm of odds (LOD) score = 5.9). STX4, a member of the syntaxin family, is a component of the SNARE machinery involved in several vesicle transport and recycling pathways. In silico analysis showed that murine orthologue Stx4a is highly and widespread expressed in the developing and adult inner ear. Immunofluorescent imaging revealed localization of STX4A in the cell body, cell membrane and stereocilia of inner and outer hair cells. Furthermore, a morpholino-based knockdown of stx4 in zebrafish showed an abnormal startle response, morphological and developmental defects, and a disrupted mechanotransduction function in neuromast hair cells measured via FM1-43 uptake. Our findings indicate that STX4 dysfunction leads to HI in humans and zebrafish and supports the evolutionary conserved role of STX4 in inner ear development and hair cell functioning.
Identifiants
pubmed: 36355422
pii: 6820909
doi: 10.1093/hmg/ddac257
pmc: PMC10026253
doi:
Substances chimiques
Qa-SNARE Proteins
0
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Research Support, N.I.H., Extramural
Langues
eng
Sous-ensembles de citation
IM
Pagination
1184-1192Subventions
Organisme : NIDCD NIH HHS
ID : R01 DC011651
Pays : United States
Informations de copyright
© The Author(s) 2022. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oup.com.
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