Nearly all men with moderate-to-severe hemophilia B given the experimental gene therapy EtranaDez (etranacogene dezaparvovec) in the HOPE-B trial have stopped using prophylactic therapies, full study results show. Trial data also indicated that EtranaDez, formerly known as AMT-061, is effective in people with antibodies against the viral vector…

Hemgenix (etranacogene dezaparvovec), the first and only one-time gene therapy approved for hemophilia B, has been approved in Switzerland, CSL Behring, the company marketing the therapy globally, announced. “The approval of Hemgenix in Switzerland marks an important milestone for patients, and we look forward to collaborating with…

A single dose of Spark Therapeutics’ investigational gene therapy SPK-8011 safely and effectively prevented bleeding episodes and the use of clotting factor VIII (FVIII) for up to four years in men with hemophilia A, according to the latest data from a Phase 1/2 trial and its extension study.

The first documented case of a previously untreated hemophilia B patient developing inhibitors against the extended half-life therapy Alprolix was described in a report from Canada. The report also shows how combining routine administration of Alprolix with medications that suppress the immune system can be used to stop…

Note: This story was updated Nov. 6, 2020, to clarify key scientific concepts. The gene-editing tool CRISPR/Cas9 enables a targeted gene insertion approach that may be superior to conventional gene therapy at restoring the activity of factor IX (FIX), the blood-clotting protein missing in people with…

Dexamethasone, a steroid with immunosuppressive and anti-inflammatory properties, may temporarily increase the efficacy of one-time gene therapy when given at later time points, a study in mice suggests. Lab results showed that dexamethasone increased the levels of factor IX (FIX) — the missing clotting protein in hemophilia B —…

The U.S. Food and Drug Administration (FDA) has approved the one-time gene therapy Roctavian (valoctocogene roxaparvovec-rvox) for eligible adults with severe hemophilia A.  Roctavian now becomes the first gene therapy to win FDA approval for the treatment of hemophilia A in the U.S. “Today’s approval of Roctavian builds…

Researchers have developed a protein drug that may teach the body to tolerate, rather than reject, the clotting factor treatment given to hemophilia patients. The new drug, tested in dogs, may lead to novel human therapies. The study, “Oral Tolerance Induction in Hemophilia B Dogs Fed with Transplastomic Lettuce,” appeared in the…

Three hemophilia B patients said they were able to lead a relatively normal life, including being more active and participating in sports, about three years after receiving the investigational gene therapy AMT-060 in a clinical trial. Their experiences were reported in the study, “The Patient…

The European Medicines Agency (EMA) has agreed to review a request by CSL Behring to approve the potential gene therapy EtranaDez (etranacogene dezaparvovec) for people with hemophilia B. The request, in the form of a marketing authorization application or MAA, will be reviewed under the EMA’s accelerated assessment, meaning…