FDA Clinical Hold on BioMarin Phearless Study

FDA has placed a clinical hold on the BioMarin BMN 307 Phearless Phase 1/2 study evaluating an investigational AAV5-phenylalanine hydroxylase gene therapy in adults with phenylketonuria. A company statement says the clinical hold was based on interim safety findings from a pre-clinical, non-GLP (good laboratory practice) pharmacology study.

The statement says BioMarin is pausing further enrollment in the global Phase 1/2 study pending investigation of findings of cancers in some rodents treated with the drug.

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