" class="no-js "lang="en-US"> PTC Therapeutics Achieves Endpoint with Sepiapterin in PKU
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PTC Therapeutics Announces APHENITY Trial Achieved Primary Endpoint with Sepiapterin in PKU Patients | MTA

May 18 2023

PTC Therapeutics Announces APHENITY Trial Achieved Primary Endpoint with Sepiapterin in PKU Patients

PTC Therapeutics has announced that the primary endpoint was achieved in the APHENITY, Phase 3 registration-directed clinical trial of sepiapterin in adult and pediatric patients with phenylketonuria (PKU).

“The positive results from the APHENITY trial bring us one step closer to providing a therapy that could deliver meaningful benefit to PKU patients,” said Matthew Klein, Chief Executive Officer, PTC Therapeutics. “The Phe reductions observed in the placebo-controlled portion of the study are consistent with, and, in some cases, exceed the magnitude of Phe reductions recorded in the open label portion of the study. We look forward to meeting with regulatory authorities to discuss the path to approval.”

The placebo-controlled portion of the study included 98 patients in the primary analysis population. The mean percent Phe reduction in sepiapterin-treated patients was 63%. In the subset of classical PKU patients, the mean percent Phe reduction was 69%. Minimal reductions in Phe levels were observed in the placebo treated patients resulting in a highly statistically significant sepiapterin treatment benefit (p<0.0001). Sepiapterin was generally well tolerated with no serious adverse events.

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