Aptevo Therapeutics Presents New Clinical Data Evaluating the Safety and Efficacy of IXINITY in Children With Hemophilia B
Data Presented at the Hemostasis and Thrombosis
“We’re encouraged to see data in a pediatric setting demonstrating the safety and efficacy of IXINITY in this important population,” said
The data presented at the
Among the 11 subjects receiving a prophylactic regimen of IXINITY, the median number of bleeding episodes was 1.0 (range 0-11) and the median annualized bleeding rate was 0.3 (range 0-4.0). Of the 61 bleeding episodes experienced by all subjects in this study, 6 (10%) resolved with no infusions of IXINITY, 44 (72%) resolved after one infusion of IXINITY, 5 (8%) required two infusions, and 6 (10%) required three, four, or five infusions of IXINITY. Of the 34 bleeding episodes rated, subjects rated bleed control as “excellent” for 22 (65%) of the bleeding episodes; “good” for 11 (32%) of the bleeding episodes; “fair” for 1 (3%) of the bleeding episodes; and “poor” for no episodes.
Adverse events reported in this study which were believed to be related to IXINITY were hyperhidrosis (excessive sweating) and fever in one patient, and hyperhidrosis in another patient. None of the subjects developed factor IX inhibitors during the study.
“As patients are known to respond to different factor IX options differently, IXINITY offers people with Hemophilia B another option to dose strategically to prevent and control bleeding episodes. We see value in having a variety of options available for patients and look forward to building on the data set in a pediatric setting to support a label expansion for IXINITY in patients under 12 years of age,” said Dr. Stromatt.
About Hemophilia B
Hemophilia B is a congenital bleeding disorder caused by a deficiency of coagulation factor IX. It affects approximately 1:25,000 male births, with approximately 4,000 persons affected in the U.S. The clinical spectrum may include spontaneous or trauma-induced bleeding into joints, muscles, and soft tissues, resulting in joint damage, reduction in mobility, and severe arthritis, all of which negatively impact health-related quality of life. The primary aim of care is to prevent and treat bleeding by replacing the deficient clotting factor.
IXINITY is indicated for the control and prevention of bleeding episodes and for perioperative management for adults and children ≥12 years of age with Hemophilia B. IXINITY is not indicated for induction of immune tolerance in patients with Hemophilia B. IXINITY contains recombinant coagulation factor IX (trenonacog alfa). Trenonacog alfa is a purified single chain glycoprotein derived from Chinese hamster ovary (CHO) cells and has an amino acid sequence that is comparable to the Thr148 allelic form of plasma-derived factor IX. No human or animal proteins are added during any stage of manufacturing or formulation of IXINITY. The recombinant factor IX is purified by a chromatography purification process. The process includes three validated steps for virus inactivation and removal. The process also includes a validated manufacturing step to reduce the presence of CHO proteins in the final drug product.
Indications and Important Risk Information
IXINITY [Coagulation Factor IX (Recombinant)] Lyophilized Powder for Solution for Intravenous Injection is a coagulation factor IX (recombinant) indicated in adults and children ≥ 12 years of age with Hemophilia B for control and prevention of bleeding episodes, and for perioperative management. IXINITY is not indicated for induction of immune tolerance in patients with Hemophilia B. IXINITY is contraindicated in patients who have known hypersensitivity to IXINITY or its excipients, including hamster protein.
Hypersensitivity reactions, including anaphylaxis, may occur following IXINITY administration. Discontinue use of IXINITY if hypersensitivity symptoms occur, and initiate appropriate treatment. Regularly evaluate patients for the development of factor IX inhibitors by appropriate clinical observations and laboratory tests. If expected factor IX activity plasma levels are not attained, or, if bleeding is not controlled as expected with a certain dose, perform an assay that measures factor IX inhibitor concentration. An association between the occurrence of a factor IX inhibitor and allergic reactions has been reported. Individuals with factor IX inhibitors may be at increased risk of severe hypersensitivity reactions or anaphylaxis if re-challenged.
Nephrotic syndrome may occur with IXINITY. Nephrotic syndrome has been reported following attempted immune tolerance induction in Hemophilia B patients with factor IX inhibitors and a history of allergic reactions. Thromboembolism may occur when using IXINITY (e.g., pulmonary embolism, venous thrombosis, and arterial thrombosis). Patients may develop hypersensitivity to hamster (CHO) protein as IXINITY contains trace amounts. The most common adverse drug reaction observed in >2% of patients in clinical trials was headache.
Please see full Prescribing Information at www.IXINITY.com.
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Aptevo Therapeutics Stacey JurchisonSenior Director, Investor Relations and Corporate Communications 206-859-6628 JurchisonS@apvo.com