Bone Therapeutics SA : completes patient recruitment for pivotal interim analysis of Phase III Osteonecrosis trial with PREOB®

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Bone Therapeutics completes patient recruitment for pivotal interim analysis of Phase III Osteonecrosis trial with PREOB®

Positive results could lead to further validation of Company`s bone-cell therapy platform

Results of interim data analysis expected Q3 2018

Gosselies, Belgium, 8 June 2017, 7am CEST - BONE THERAPEUTICS (Euronext Brussels and Paris: BOTHE), the bone cell therapy company addressing high unmet medical needs in orthopaedics and bone diseases, today announces that it has completed the recruitment of the 44 treated patients required for the planned interim analysis of the Phase III trial for the treatment of osteonecrosis of the hip with its autologous bone cell therapy product, PREOB®. If results from this interim analysis, based on a 12-month follow up of patients document a strong efficacy signal for PREOB®, the study recruitment could be terminated prematurely. Results from the 12-month follow up are expected in Q3 2018.

The interim analysis will be based on an updated clinically relevant endpoint, endorsed by the European Medicines Agency, which reflects the value added to patients and uses a composite responder analysis combining the original co-primary variables, without impacting the design and data collection of the study. This more stringent primary endpoint criterion in the revised analysis has enabled a reduction of the number of patients to be enrolled, to 118 from 130. Also, as stated in the protocol approved by the Competent Authorities in the countries where the study is being conducted, a strong efficacy signal at the interim analysis could enable the early termination of the study. The study is underway at centres in Belgium, France, Germany, the Netherlands and the United Kingdom.

The Phase III study is a randomized, double-blind, placebo-controlled pivotal trial that aims to confirm the safety and efficacy of PREOB® in early-stage osteonecrosis of the femoral head over a 24-month period. The patients received either a single administration of PREOB®, or a placebo into the necrotic lesion using a core decompression procedure. Results from an earlier exploratory Phase IIB osteonecrosis study, presented at the Annual European Congress for Rheumatology (EULAR) in June 2016, demonstrated a strong and prolonged improvement in pain and function as well as a reduction in fracture risk after treatment with PREOB® compared to standard of care.

Osteonecrosis is a rare but severe and painful orthopaedic condition characterised by the death of bone tissue, eventually causing the bone to fracture. The most common form of osteonecrosis occurs in the hip where the disease causes femoral head collapse and joint destruction. If left untreated, the condition ultimately requires a total hip replacement but, due to the age of people affected (typically between 30 and 50) hip replacement is not an appropriate long-term solution due to the limited lifespan of prostheses.

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