ultragenyx

A $2.7 Million Gene Therapy, Approved Because Patients Needed Less Cornstarch

Ultragenyx's Genglycos won accelerated approval on a surrogate: a 31 percent cut in daily cornstarch. But the disease is low blood sugar, and by the company's own numbers the treated group spent slightly more time below 70 mg/dL, while liver enzymes spiked in 71 percent and every patient needed ster