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HomeInternational Approvalsindex/list_13470_1Topical Treatment for EB Recommended for Approval in the EU

Topical Treatment for EB Recommended for Approval in the EU

A topical gel that contains birch bark extract as the active ingredient — Filsuvez (Oleogel-S10) — has been recommended for approval for the treatment of skin wounds in patients with epidermolysis bullosa (EB) by the European Medicines Agency’s (EMA’s) Committee for Medicinal Products for Human Use.

“The benefit of Filsuvez is its ability to promote healing of EB partial thickness wounds,” the EMA said in an announcement on April 22. “It is thought to work by modulating inflammatory mediators and stimulating keratinocyte differentiation and migration, thereby promoting wound health and closure,” the statement adds.

The recommended indication for the product — developed by Amryt Pharmaceuticals DAC and currently designated as an orphan drug — is for the treatment of partial-thickness wounds associated with dystrophic and junctional EB in patients aged 6 months and older. The recommendation for approval came after the EMA sought and received external advice from independent physicians treating EB and from patients with the rare disease.

The most common side effects, according to the EMA announcement, are wound complications, application site reactions, wound infections, pruritus, and hypersensitivity reactions.

In February 2022, the US Food and Drug Administration (FDA) declined to approve the company’s new drug application as it was presented and asked the company to submit additional evidence of effectiveness for Oleogel-S10 in EB, the company announced at that time. The company is currently working with the FDA “to identify the most expeditious pathway towards a potential approval,” said Patrick Bursey, of LifeSci Communications, a spokesperson for Amryt.

The company’s pivotal phase 3 trial enrolled 223 patients with EB, including 156 pediatric patients. The patients variously had three types of EB. The trial has two components: a 3-month, double-blind, randomized controlled phase, which has been completed, and an ongoing 24-month open-label, single-arm phase. The trial is being performed at 58 sites in 28 countries.

Results from the randomized controlled phase, reported in 2020, include a statistically significant increase in the proportion of patients achieving complete closure of an EB target wound within 45 days: 41.3% in the Oleogel-S10 group and 28.9% in the control group (P = .013). (Target wounds measured 10 cm² to 50 cm² and were present for at least 21 days but less than 9 months.) The safety profile of the treatment gel was acceptable and was well tolerated compared with the control gel, according to Amryt’s press release. The results were presented at the European Academy of Dermatology and Venereology Congress in October 2020.

Data from a 12-month interim analysis of the follow-up phase were presented at the annual meeting of the American Academy of Dermatology in March 2022. Results showed further reductions in total body surface area percentage wounding to 5.4% among (from 7.4% at the end of the double-blind period and 12.1% at the beginning of the study) among the patients who continued treatment and who underwent assessment, according to a company press release. Treatment was well tolerated, and no new safety signals were identified, the release said.

A decision by the European Commission is expected within the next 2 months.

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