FDA Grants Accelerated Approval for OTOF Gene Therapy - Summary - MDSpire

FDA Grants Accelerated Approval for OTOF Gene Therapy

  • By

  • Kathryn Wighton

  • April 23, 2026

  • 3 min

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Objective:

To provide a novel treatment for severe-to-profound sensorineural hearing loss associated with biallelic variants in the OTOF gene.

Key Findings:
  • 16 of 20 patients met the primary endpoint of improvement in pure tone audiometry thresholds to 70 decibel hearing level or better at 24 weeks.
  • 14 of 20 patients showed auditory brainstem responses at 90 decibel hearing level or better at 24 weeks.
  • 5 of 12 patients maintained hearing thresholds within the normal range by week 48.
Interpretation:

The therapy offers a potential breakthrough for patients with OTOF-related hearing loss, which currently lacks effective treatment options.

Limitations:
  • The therapy is not recommended for patients with inaccessible inner ear or those with prior cochlear implants.
  • Continued approval is dependent on further confirmation of clinical benefits.
Conclusion:

Lunsotogene parvec-cwha represents a significant advancement in treating a rare form of hearing loss, pending further validation of its long-term efficacy.

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