Marisa Wexler, MS,  senior science writer—

The U.S. Food and Drug Administration (FDA) is extending its review of BioMarin Pharmaceutical’s request to approve the gene therapy Roctavian (valoctocogene roxaparvovec) for adults with severe hemophilia A. A decision had been expected by the end of this month, but that date has now been…

Most children with hemophilia A given Altuviiio (efanesoctocog alfa) once a week were bleed-free throughout about a year of treatment. That’s according to top-line data from the Phase 3 XTEND-Kids trial (NCT04759131) announced by Sobi and Sanofi, the therapy’s co-developers, less than a month after…

Most people with severe hemophilia A who were given once-weekly treatment with efanesoctocog alfa in the Phase 3 XTEND-1 trial were bleed-free over a year on treatment. The therapy also improved joint and overall physical health and eased pain intensity in the participants compared with previous treatments. Results…

The World Federation of Hemophilia (WFH) has launched a registry to monitor long-term outcomes of safety and effectiveness for people with hemophilia who receive gene therapy treatment. The aim of the WFH Gene Therapy Registry (GTR) is to collect data for all patients who have gene therapy, whether through…

Treatment with the experimental gene therapy fidanacogene elaparvovec led to significant reductions in bleeding rates for men with moderately severe to severe hemophilia B who participated in a Phase 3 clinical trial. That’s according to top-line data from the study BENEGENE-2 (NCT03861273), recently announced by the therapy’s developer,…

Three years after receiving the one-time gene therapy Roctavian (valoctocogene roxaparvovec) at trial, the majority of men with severe hemophilia A in the Phase 3 GENEr8-1 study were off standard replacement therapies and did not experience any bleeds requiring treatment. That’s according to new data announced in a…

One-time treatment with the investigational gene therapy SPK-8011 led to sustained low bleed rates for people with hemophilia A in a Phase 1/2 clinical trial. That’s according to data of up to 5 years of follow-up presented by the therapy’s developer, Spark Therapeutics, at the annual meeting of…

A committee of the European Medicines Agency (EMA) has issued a positive opinion recommending the one-time gene therapy etranacogene dezaparvovec be granted conditional marketing authorization to treat appropriate adults with hemophilia B. The recommendation from the EMA’s Committee for Medicinal Products for Human Use (CHMP) will now be…

The U.S. Food and Drug Administration (FDA) has scheduled its inspection of the facility in California where BioMarin Pharmaceutical would produce the gene therapy Roctavian (valoctocogene roxaparvovec) if it’s approved. The agency is reviewing a biologics license application (BLA) from BioMarin that seeks approval of Roctavian to…

Two new gene therapy vectors designed for liver diseases show promising effects in a mouse model of hemophilia B, according to a recent study. The study, “Adeno-associated virus serotype 2 capsid variants for improved liver-directed gene therapy,” was published in Hepatology. Hemophilia B is caused…