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The benefits of a one-time gene therapy were sustained for up to 13 years among men with severe hemophilia B with no new safety concerns emerging, according to newly published results from a clinical trial. The findings, which encompass the longest ever follow-up for a gene therapy study in…

Successful immune tolerance induction (ITI) — a type of treatment that aims to re-educate the immune system to prevent the formation of inhibitors, or neutralizing antibodies targeting clotting factors — was associated with lower treatment costs in hemophilia A patients with inhibitors, a study in Brazil reported. Conversely, treatment…

Note: This story was updated June 11, 2025, to correct the number of weeks the woman in the case study was pregnant to 36. A woman carrying a hemophilia B genetic mutation received regular factor IX (FIX) replacement therapy during pregnancy and successfully delivered her baby with no severe…

A lack of family history of disease can delay a diagnosis and timely initiation of preventive therapy in children with hemophilia A, increasing the need for intensive factor replacement therapy when a first bleeding event happens, a study shows. “These observations highlight the importance of an early diagnosis in…

CAR T-cell therapy, a type of treatment that weaponizes the body’s immune system and was originally developed to treat cancer, for the first time successfully treated a patient with acquired hemophilia A (AHA), a study reported. The study, “Anti-CD19 CAR-T cell therapy for acquired hemophilia A,”…

The blood-clotting protein factor VIII (FVIII) that’s missing or faulty in people with hemophilia A is flexible and adopts multiple shapes, some of which favor the binding of neutralizing antibodies that can reduce the effectiveness of FVIII replacement therapies, researchers have learned. “This helps explain why some people…

Acquired hemophilia A (AHA) arose in a 48-year old man with primary biliary cholangitis (PBC), an autoimmune liver disease, according to a case study. While AHA has been associated with autoimmune disorders, the researchers said a connection between AHA and PBC had not been reported previously. While “the…

A therapy designed to promote the growth of regulatory T-cells (Tregs) in the body prevented inhibitor development in a mouse model of hemophilia A that was treated with factor replacement therapy, a study showed. Inhibitors, a type of neutralizing antibody some patients develop that can make replacement therapies…

Jivi (damoctocog alfa pegol) has received approval from the U.S. Food and Drug Administration (FDA) that now extends to children with hemophilia A as young as 7 years old. Jivi had previously been authorized for hemophilia A patients 12 and older. The therapy, which is sold by Bayer,…

Prophylactic (preventive) treatment for hemophilia A and B is generally more effective than on-demand treatment in reducing the frequency of bleeding, but the benefit is not as clear in patients who have developed inhibitors that limit how well replacement clotting factors work. That’s according to real-world data from…