Mouse (Otof-Q828X hom disease model) and cynomolgus monkey
“Single-dose toxicology studies were conducted in Otof-Q828X hom mice and cynomolgus monkeys.”
✓ VerifiedFDA pharmacology/toxicology review, p. 3Source ↗
Why that species
Otof-Q828X mice recapitulate human deafness phenotype; monkey inner ear anatomy similar to human, clinical surgical approach
“This study provides the most clinically relevant procedural safety data, as it utilized the same RWM surgical approach intended for clinical use and was performed in monkeys with inner ear anatomy similar to humans.”
✓ VerifiedFDA pharmacology/toxicology review, p. 26Source ↗
Surrogate molecule
No surrogate; clinical-process DB-OTO (non-GMP lot B564TOXP1) used in all GLP studies
“The same non-GMP lot (B564TOXP1) was used across all three GLP studies to ensure consistency in the pivotal safety and activity studies.”
✓ VerifiedFDA pharmacology/toxicology review, p. 7Source ↗
Species: general tox
Otof-Q828X homozygous mouse and cynomolgus monkey (single-dose studies)
“Single-dose toxicology studies were conducted in Otof-Q828X hom mice and cynomolgus monkeys.”
✓ VerifiedFDA pharmacology/toxicology review, p. 3Source ↗
Species: DART
Not conducted (intracochlear route, limited systemic exposure, target population, no toxicology concerns)
“Developmental and reproductive toxicity, genotoxicity, and carcinogenicity studies were not conducted with DB-OTO. These studies were not warranted based on the IC route of administration, limited systemic exposure, target patient population, and absence of safety concerns in the toxicology studies.”
✓ VerifiedFDA pharmacology/toxicology review, p. 3Source ↗
Species: carcinogenicity
Not conducted
“No carcinogenicity studies have been conducted with DB-OTO.”
✓ VerifiedFDA pharmacology/toxicology review, p. 17Source ↗
Surrogate used in
No surrogate used; clinical-process DB-OTO lot used across all GLP studies
“The same non-GMP lot (B564TOXP1) was used across all three GLP studies to ensure consistency in the pivotal safety and activity studies.”
✓ VerifiedFDA pharmacology/toxicology review, p. 7Source ↗