Mouse studies did not mimic clinical dosing; gene therapy may mask CuHis benefit; SC distribution may differ in mice
“Some possibilities include: 1) the study designs did not mimic clinical administration of the drug; 2) gene therapy may have superseded any benefit of CuHis; 3) subcutaneous CuHis may not be readily distributed in mice compared to humans;”
FDA: efficacy not determined in MD mouse models; nonclinical data cannot serve as confirmatory evidence
“Therefore, from a nonclinical perspective, the efficacy of CuHis was not determined in mouse models of MD, and the nonclinical data cannot serve as CE.”