Pfizer Inc (PFE.SG)

Pfizer reports patient death in Duchenne gene therapy study

A young boy died due to a cardiac arrest in a mid-stage trial that tested Pfizer's experimental gene therapy for a muscle-wasting disorder called Duchenne muscular dystrophy (DMD), the drugmaker told Reuters on Tuesday. "A fatal serious adverse event was reported as cardiac arrest for a participant in the Phase 2 DAYLIGHT study," a company spokesperson told Reuters in an emailed response. The trial tested boys 2 years to less than 4 years of age with DMD, a genetic muscle wasting disorder in which most patients lack the protein dystrophin which keeps muscles intact.