MediWound (MDWD) Phase 3 Pediatric Study (CIDS) of NexoBrid for Eschar Removal of Severe Thermal Burns Mets Primary Endpoints

MediWound Ltd. (Nasdaq: MDWD), a fully-integrated biopharmaceutical company focused on next-generation bio-therapeutics solutions for tissue repair and regeneration, today announced positive topline results from its pivotal phase 3 pediatric clinical study (CIDS - Children Innovation Debridement Study) with NexoBrid^® to treat children with severe thermal burns, evaluating the efficacy and safety compared with standard-of-care (SOC).

The study met its three primary endpoints with a high degree of statistical significance. NexoBrid demonstrated a significant reduction in time to achieve complete eschar removal and significant reduction in wound area requiring surgical excision (surgical need) while demonstrating non-inferiority to SOC in quality of scars. The study also met certain secondary endpoints showing statistically significant reduction in the incidence of surgical excision and reduction in need for autograft in deep partial burns, as well as a favorable trend in reduction of blood loss during the eschar removal process. In addition, the study showed that NexoBrid was safe and well-tolerated.

“We are thrilled to see such robust results across all primary endpoints, which corroborate the positive results of our pivotal phase 3 clinical studies in adult patients, and clearly demonstrate the significant beneficial impact NexoBrid has on the lives of pediatric burn patients,” said Sharon Malka, Chief Executive Officer of MediWound. "It is gratifying to know that NexoBrid, with these highly compelling top-line results, is one step closer to becoming available as a treatment option for pediatric patients with severe burns."

Dr. Lior Rosenberg, MediWound's Chief Medical Technology Officer, added, “This study is one of the most comprehensive randomized controlled studies ever conducted in burn care generally and within the pediatric population specifically. We thank all the Principal Investigators and their teams, as well as the patients and their families, for their work and commitment to advance burn care. We also thank the U.S. Biomedical Advanced Research and Development Authority (BARDA) for their continued support for this project. The current mode of pediatric burn management requires intensive medical therapy, which poses challenges due to the surgical complexities in treating young patients with severe burns. Having NexoBrid as a non-surgical option provides a minimally invasive alternative to the current surgical standard of care for treating severe burns in pediatric patients.”

CIDS Study Design and Objectives

The NexoBrid CIDS study is a multicenter, multinational, randomized, controlled, open label study, performed in children with deep partial thickness (DPT) and full thickness (FT) thermal burns. The study's objectives are to evaluate the efficacy and safety of treatment with NexoBrid compared with standard of care (SOC) in hospitalized children with severe thermal burns of 1 percent to 30 percent Total Body Surface Area (TBSA). The study enrolled 145 pediatric patients, from newborn to eighteen years of age, randomized to either NexoBrid or SOC at a ratio of 1:1, across 36 burn centers worldwide. Topline results include acute phase and twelve-month follow-up data analysis. The long-term follow-up for cosmesis and function, quality of life and safety measurements is ongoing, and data is expected in the first half of 2023.

The European Medicines Agency (“EMA”) endorsed the study design as part of the agreed-upon Pediatric Investigational Plan (“PIP”) to support the indication label expansion to include pediatric patients. The primary endpoints included early eschar removal, reduction of wound area surgically excised (surgical need) and non-inferiority cosmesis and function at twelve months follow-up from wound closure. Secondary endpoints included reduction in the need for surgical excision for eschar removal (surgical need), blood loss, reduction of the need for autograft in DPT wounds and non-inferiority in cosmesis and function at twenty-four months follow-up from wound closure. Non-inferiority of the time to complete wound closure and other standard safety measurements were also compared with the SOC control arm.

The study was expanded to include burn centers in the United States following agreement with the FDA, under the same protocol with alignment to the U.S. phase 3 study (DETECT) protocol for adult population. The non-inferiority of cosmesis and function at twelve months and twenty-four months from wound closure were defined as safety measurements. In addition, reduction in surgical need was measured only by reduction in incidence of surgical excision for eschar removal.

Funding and support for this pivotal pediatric Phase 3 clinical study (CIDS) with NexoBrid is provided by the Biomedical Advanced Research and Development Authority (BARDA), under the office of the Assistant Secretary for Preparedness and Response (ASPR), within the U.S. Department of Health and Human Services (HHS), under ongoing contract number HHSO100201500035C.

Summary of Study Topline Results

Demographics and other baseline characteristics

The overall patient demographics and wound baseline characteristics were comparable across study arms.

Primary Endpoints

The study met its three primary endpoints with highly statistical significance. Patients treated with NexoBrid demonstrated a significantly shorter time to achieve complete eschar removal compared with patients treated with SOC (median time to complete eschar removal - NexoBrid: 0.99 days vs. SOC: 5.99 days, p=0.0008¹).

Patients treated with NexoBrid demonstrated a significant reduction in surgical need for excisional eschar removal as measured by an analysis of percent wound area surgically excised for eschar removal. Patients treated with NexoBrid incurred a significantly lower percent of wound area surgically excised for eschar removal compared with patients treated with SOC (NexoBrid: 1.5% vs. SOC: 48.1%, p<0.0001).

The non-inferiority analysis of cosmesis and function of scars (quality of scars) measured by MVSS (modified Vancouver scar scale) at twelve-months from wound closure, demonstrated that NexoBrid was non-inferior to SOC (p<0.0001).

Secondary Endpoints

The study included several secondary endpoints that provided further insight on additional efficacy parameters.

Patients treated with NexoBrid demonstrated a statistically significant lower incidence of surgical excision for eschar removal compared with patients treated with SOC (NexoBrid: 8.33% (6/72) vs. SOC: 64.38% (47/73), p<0.0001).

Patients treated with NexoBrid incurred lower blood loss during the eschar removal procedure compared with patients treated with SOC, demonstrating a clear trend in favor of NexoBrid (mean volume – NexoBrid: 32.36 ml vs. SOC: 202.55 ml, p=0.134).

Patients treated with NexoBrid demonstrated significant reduction of incidence of autograft performed in DPT wounds (on a target wounds level analysis) compared with patients treated with SOC (NexoBrid: 25.93% (21/81) vs. SOC: 37.63% (26/69), p=0.05).

Patients treated with NexoBrid incurred a numerically lower percent area of DPT wound autografted compared with patients treated with SOC (NexoBrid: 15.9% vs. SOC: 22.8%, p=0.5).

Safety

No deleterious effect on wound healing was observed. Patients treated with NexoBrid had a non-inferior time to complete wound closure compared with patients treated with SOC (p=0.0149¹). Estimated median time to complete wound closure, using Kaplan Meier analysis, was 32 days for patients treated with NexoBrid and 34 days for patients treated with SOC.

The study DSMB (Data Safety Monitoring Board) reviewed the data of all subjects and found NexoBrid to
be safe and well tolerated. No safety concerns were identified in the study population.

About NexoBrid

NexoBrid (concentrate of proteolytic enzymes enriched in Bromelain) is a topically administered biological product that enzymatically removes nonviable burn tissue, or eschar, in patients with deep partial and full-thickness thermal burns within four hours of application without harming viable tissue. NexoBrid is approved in the European Union and other international markets and has been designated as an orphan biologic drug in the United States, European Union, and other international markets. Vericel holds an exclusive license for North American commercial rights to NexoBrid. In January 2019, MediWound announced positive top-line results from the acute phase of the pivotal Phase 3 U.S. clinical study (DETECT) of NexoBrid in adult patients with deep partial-and full-thickness thermal burns up to 30 percent of total body surface area. The study met its primary endpoint of complete eschar removal compared to gel vehicle as well as all secondary endpoints compared to standard of care (SOC), including shorter time to eschar removal, a lower incidence of surgical eschar removal and lower blood loss during eschar removal. Safety endpoints, including the key safety endpoint of non-inferiority in time to complete wound closure compared with patients treated with SOC, were also achieved. In addition, the twelve-month and twenty- four-month follow-up safety data of cosmesis and function were found to be comparable between the treatment and SOC arms, and no new safety signals were observed. NexoBrid is currently an investigational product in the United States.

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