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Intratympanic Administration of OTO-313 Reduces Tinnitus in Patients With Moderate to Severe, Persistent Tinnitus: A Phase 1/2 Study

2021; Lippincott Williams & Wilkins; Volume: 42; Issue: 10 Linguagem: Inglês

10.1097/mao.0000000000003369

1537-4505

Kenneth S. Maxwell, James M. Robinson, Ines Hoffmann, Huiying J. Hou, Grant D. Searchfield, David Baguley, Gordon McMurry, Fabrice Piu, Jeffery J. Anderson,

Hearing Loss and Rehabilitation

Objective: To evaluate the safety and exploratory efficacy of intratympanic administration of OTO-313 in patients with tinnitus. Study Design: Single intratympanic injection of OTO-313 evaluated in a randomized, double-blind, placebo-controlled Phase 1/2 clinical study. Setting: Tertiary referral centers. Patients: Patients with unilateral tinnitus (moderate–severe) with tinnitus duration 1 to 6 months. Interventions: Intratympanic OTO-313. Main Outcome Measures: Safety and change from baseline in tinnitus functional index (TFI), daily ratings of tinnitus loudness and annoyance, and patient global impression of change (PGIC). Results: OTO-313 was well-tolerated with lower incidence of adverse events than placebo. Mean TFI reduction from baseline favored OTO-313 at Week 2, 4, and 8. A clinically meaningful, 13-point improvement on the TFI was observed in 43% (6/14) of OTO-313 patients at both Weeks 4 and 8 versus 13% (2/16) of placebo patients (ad hoc responder analysis, p -value < 0.05). Reductions in daily ratings of tinnitus loudness and annoyance favored OTO-313 compared with placebo. In OTO-313 responders, a strong correlation existed between change from baseline in TFI score and changes in tinnitus loudness, tinnitus annoyance, and PGIC. Conclusions: OTO-313 was well-tolerated and demonstrated a higher proportion of responders than placebo across consecutive visits (Weeks 4 and 8) supporting further clinical development of OTO-313 for the treatment of tinnitus.