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‹ Sat · 20 Jun 2026
Promising but preliminary

Efficacy and safety of SENS-501, a dual-AAV otoferlin gene therapy, for DFNB9 congenital deafness.

A gene therapy restored hearing in deaf mice within weeks and is now being tested in people with a common genetic form of deafness.

SENS-501, a dual-AAV8 otoferlin gene therapy, restored hearing in congenitally deaf mice within 3 weeks with effects sustained to 10 months, and demonstrated acceptable safety in NHP GLP toxicology studies; a phase 1/2 clinical trial in DFNB9 patients is underway. DFNB9 (caused by OTOF mutations) is one of the most prevalent forms of genetic non-syndromic sensorineural hearing loss.

What the study was

Study design
Preclinical study with GLP toxicology in NHP
Population
Otof-/- mouse model; non-human primate toxicology
Category
Drug Development
Maturity
Exploratory
Journal
Molecular Therapy Advances

Why it surfaced

Promising gene therapy with NHP safety data and active phase 1/2 trial for rare congenital deafness. Preclinical, so capped at 6.

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