ArticleMolecular genetics & genomic medicine2024
Identification of rare missense variants in the BSN gene co-segregating with chronic otitis media in a consanguineous Pakistani family.
Article in Molecular genetics & genomic medicine, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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1 citing paper in PubMed.
- Identification of rare missense variants in the BSN gene co-segregating with chronic otitis media in a consanguineous Pakistani family.Molecular genetics & genomic medicine · 2024Article
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8 authors.
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Abstract
backgroundOtitis media (OM) is the most frequent and complex middle ear condition with multifactorial etiology including genetic predisposition. OM depicts a variable clinical spectrum, leading to speech, developmental delay, and hearing loss. Here, we report the clinical and genetic findings of chronic suppurative otitis media (CSOM) segregating in a six-generation consanguineous Pakistani family PKOM08.
methodsClinical evaluations, including audio and tympanometry, were conducted to assess OM manifestation and their impact on hearing function. Exome sequencing was performed to identify potential genetic variants underlying CSOM in the study participants.
resultsClinical evaluation of participating individuals revealed varying degrees of disease severity, with mild to moderate hearing loss. All the affected individuals had CSOM with no other apparent comorbidity. Whole exome followed by Sanger sequencing revealed two rare heterozygous variants [c.1867C>T, p.(Pro623Ser) and c.11015G>A, p.(Arg3672Gln)] of BSN gene in most of the affected individuals of family PKOM08. BSN encodes a scaffold bassoon protein involved in synaptic vesicle trafficking. The identified variants replaced evolutionary conserved amino acid residues in the encoded protein and are predicted to impact the ionic interactions in the secondary structure.
conclusionA deep intronic variant of BSN has been previously implicated in the etiology of childhood ear infections. Our study further supports a link between BSN-impaired function and ear infection and CSOM in children.
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