Pediatric Menkes Disease Drug Approved

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FDA has approved a Sentynl Therapeutics NDA for Zycubo (copper histidinate) injection as the first treatment for Menkes disease in pediatric patients. Menkes disease is a neurodegenerative disorder caused by a genetic defect that impairs a child’s ability to absorb copper. “The disease is characterized by seizures, failure to gain weight and grow, developmental delays, and intellectual disability, FDA says. “It leads to abnormalities of the vascular system, bladder, bowel, bones, muscles, and nervous system. Children with classical Menkes (90% of those with the disease) begin to develop symptoms in infancy and typically do not live past three years.

Subcutaneous injectable Zycubo is a copper replacement therapy that delivers copper in a form that bypasses the genetic defect in intestinal absorption, allowing the body to better use the mineral. FDA says it evaluated data from two open-label, single-arm clinical trials in pediatric patients treated for up to three years. “Children who began treatment within four weeks of birth had a 78% reduction in the risk of death compared with untreated patients,” it says. “Nearly half of early-treated patients survived beyond six years, and some survived more than 12 years. No patients in the untreated control group survived beyond six years. Children who started treatment later than four weeks after birth also experienced a substantial survival benefit.”

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