Review extension for Krystal Gene Therapy BLA

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FDA has extended by three months a Krystal Biotech BLA for B-Vec (beremagene geperpavec), a gene therapy indicated for treating patients with dystrophic epidermolysis bullosa (DEB), after it submitted manufacturing data pursuant to an agency information request. The topical gene therapy is designed to treat DEB at the molecular level by providing the patient’s skin cells with two copies of the COL7A1 gene to make functional COL7 protein, which addresses the underlying disease-causing mechanism, according to the company. The user fee review action target date has been revised to 5/19.

Krystal says the manufacturing information submitted included “additional information about a replaced hardware unit in the concentration step of the manufacturing process and comparability data supporting the use of the unit. The unit did not affect processing parameters or product contact materials. The FDA considered this new information as a major amendment to the application that will require additional time for review.”

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