Benitec Biopharma Reports Positive Interim Clinical Trial Data for First OPMD Subject Treated with BB-301 in Phase 1b/2a Study

-First efficacy signals demonstrated for a gene therapy under development for Oculopharyngeal Muscular Dystrophy (OPMD) which affects ~15,000 patients worldwide-

- BB-301 facilitated improvements across multiple measures of swallowing function in the first Phase 1b/2a clinical study subject as compared to pretreatment assessments conducted during the observational natural history portion of the study-

-Virtual R&D Day being held today at 9:00 am EDT, details below-

HAYWARD, Calif., April 18, 2024 (GLOBE NEWSWIRE) -- Benitec Biopharma Inc. (NASDAQ: BNTC) (“Benitec” or “Company”), a clinical-stage, gene therapy-focused, biotechnology company developing novel genetic medicines based on its proprietary “Silence and Replace” DNA-directed RNA interference (“ddRNAi”) platform, today announces positive interim clinical data from the 90-day timepoint following the administration of BB-301 to the study’s first subject (Subject 1) treated in the BB-301 Phase 1b/2a single-arm, open-label, sequential, dose-escalation cohort study (NCT06185673) in Oculopharyngeal Muscular Dystrophy (OPMD). BB-301 has been granted Orphan Drug designation by the US Food and Drug Administration (FDA) and European Medicines Agency (EMA) Committee for Orphan Medicinal Products (COMP).

“To date, no clinical studies have systematically demonstrated a clinical improvement in OPMD patients across both objective and subjective measures of swallowing. We are, therefore, pleased to report positive interim clinical data from multiple radiographic measures as well as subject-reported outcome measures from the first subject treated with BB-301,” said Jerel A. Banks, M.D., Ph.D., Executive Chairman and Chief Executive Officer of Benitec. “We are highly encouraged by these early clinical trial results and for the hope that they may offer to patients and caregivers, and we look forward to reporting additional results and continuing to treat patients as they enter the dosing portion of the study from the Natural History observational lead-in period.”

BB-301 Interim Clinical Study Results:

During the OPMD Natural History Study, which represents the pre-dose observational period for each subject, Subject 1 experienced progressive worsening of dysphagia as demonstrated by the results of the videofluoroscopic swallowing studies (VFSS), the cold water timed drinking test, and the key subject-reported outcome measure (the Sydney Swallow Questionnaire). Videofluoroscopic swallowing studies represent the gold standard analytical method for the quantitative assessment of dysphagia (swallowing difficulty) in the clinical setting.