Discriminating between inherited and non-inherited sporadic hearing loss is challenging. Here, we attempted to delineate genetic inheritance in simplex cases of severe-to-profound congenital hearing loss in Korean children. Variations in SLC26A4 and GJB2 in 28 children with bilateral severe-to-profound non-syndromic hearing loss (NSHL) without familial history were analyzed using Sanger sequenc...

Approximately one child per 1000 is diagnosed with severe, profound, or early onset hearing impairment, of whom approximately 50% are thought to have a genetic cause. 2 Associated clinical findings, if present and recognised neonatally, often facilitate the identification of a syndrome and the prediction that a hearing problem is likely to be part of the clinical profile. While the presence of ...

Perrault syndrome 5 is a rare autosomal recessive disorder that characterized by the association of sensorineural hearing loss and ovarian dysgenesis in females with diversity neurologic deficits due to variants twinkle mtDNA helicase (<i>TWNK</i>) gene. Since develop gradually, patient often misdiagnosed other neurological disease during early age. Herein, we report case geneticall...

We have studied 36 subjects in a large multigenerational Chinese family that is segregating for an autosomal dominant adult onset form of progressive non-syndromic hearing loss. All affected subjects had bilateral sensorineural hearing loss involving all frequencies with some significant gender differences in initial presentation. After excluding linkage to known loci for non-syndromic deafness...

BACKGROUND Audiological evaluation of parents of individuals with autosomal recessive hearing loss. AIM To study the audiological profile of parents of individuals with autosomal recessive hearing loss, inferred by family history or by molecular tests that detected heterozygous mutations in the GJB2 gene. This gene codes Connexin 26. METHOD Participants were 36 subjects, ranging between 30 ...

Non-syndromic mental retardation is one of the most serious neurodevelopmental disorders, which has a serious impact not only on the affected individuals and their families but also on the health care system and society. Previously research has been more focused on the X-linked mental retardation and only recently studies have shown that non-syndromic autosomal recessive mental retardation is e...

Mutations in the GJB2 gene encoding connexin26 (CX26) account for up to 50% of cases of autosomal recessive hearing loss. In contrast, only one GJB2 mutation has been reported to date in an autosomal dominant form of isolated prelingual hearing loss. We report here a novel heterozygous 605G-->T mutation in GJB2 in all affected members of a large family with late childhood onset of autosomal dom...

Mutations in the GJB2 gene encoding connexin26 (CX26) account for up to 50% of cases of autosomal recessive hearing loss. In contrast, only one GJB2 mutation has been reported to date in an autosomal dominant form of isolated prelingual hearing loss. We report here a novel heterozygous 605G→T mutation in GJB2 in all aVected members of a large family with late childhood onset of autosomal domina...