OTOF -Related Hearing Loss

CLINICAL CHARACTERISTICS: OTOF -related hearing loss is an auditory synaptopathy that results from defective synaptic transmission from normally functioning cochlear inner hair cells (IHCs) to the auditory nerve. Thus, newborn hearing screening (NBHS) that relies on otoacoustic emission (OAE) testing, which primarily assesses function of outer hair cells (OHCs), is usually normal, whereas hearing tests that rely on...

✦ Clinical Takeaway ✦

Audiologists should recognise the OTOF/otoferlin auditory synaptopathy profile — normal OAEs with absent/abnormal ABR — as a distinct entity guiding genetic referral and cochlear implant candidacy evaluation; no change to standard CI protocols is required pending emerging gene-therapy trials.

✦ Why It Matters ✦

OTOF-related hearing loss is the most common form of auditory synaptopathy and a leading candidate for gene therapy, making accurate diagnosis increasingly consequential as treatment options emerge.

✦ Key Points ✦

01Caused by pathogenic variants in the OTOF gene encoding otoferlin, critical for synaptic vesicle release at inner hair cells.
02Hallmark audiological profile: present OAEs but absent or severely abnormal ABR (auditory brainstem response).
03Typically presents as congenital severe-to-profound bilateral sensorineural hearing loss.
04Cochlear implantation is currently the primary management and generally yields good outcomes.
05GeneReviews is a curated expert-authored reference, not a primary research study.

✦ Claims & Evidence ✦

ClaimEvidenceSupport

OTOF-related hearing loss is caused by biallelic pathogenic variants in the otoferlin (OTOF) gene.

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The condition produces an auditory synaptopathy pattern with preserved outer hair cell function (normal OAEs) but abnormal auditory nerve/brainstem response.

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Cochlear implantation is effective management for individuals with OTOF-related hearing loss.

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✦ Research metadata ✦

PMID: 20301429
Journal: GeneReviews (NCBI Bookshelf)
Publication type: review
Evidence level: 5
Population: Individuals with biallelic OTOF pathogenic variants presenting with congenital or prelingual severe-to-profound hearing loss
Intervention: Review of clinical characteristics, molecular diagnosis, and management of OTOF-related hearing loss

Primary outcomes

Clinical characterisation of OTOF-related auditory synaptopathy; Diagnostic criteria and genetic testing strategy; Management recommendations including cochlear implantation outcomes

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