US FDA Again Asked To Hold Off On Approval Of Ryoncil Pediatric Cell Therapy

Attorney says new information Mesoblast submitted following ‘complete response’ letter does not include data from randomized controlled trial, which he says is needed to provide substantial evidence of efficacy in treatment of children with graft-versus-host disease.

Graft-versus-host disease
Additional study is needed for approval of cell therapy for pediatric graft-versus-host disease, petitioner tells FDA • Source: Shutterstock

Two years after receiving a ‘complete response’ letter from the US Food and Drug Administration on its biologics license application for Ryoncil (remestemcel-L) for treatment of pediatric steroid-refractory acute graft-versus-host-disease, Mesoblast Limited submitted new information to the agency. But an attorney contends that the submission is inadequate because Mesoblast did not conduct a randomized controlled study of the allogeneic cell therapy product.

The Australian company announced on 3 October that it had submitted “substantial new information on clinical and potency assay items identified in the

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