PTC Therapeutics, Inc. announced the initiation of the PIVOT-HD Phase 2 clinical trial evaluating PTC518 in people with Huntington's disease (HD). PIVOT-HD is a global trial starting in the United States. PTC518 is an oral, small molecule splicing modifier that was specifically designed to selectively lower huntingtin mRNA and protein.

There are no current treatments for the underlying cause of HD. The PIVOT-HD Phase 2 clinical trial is designed in two parts: an initial 12-week placebo-controlled phase focused on PTC518 pharmacology and pharmacodynamic effect, followed by a 9-month placebo-controlled phase focused on PTC518 biomarker effect.