A Research Study Looking at Long-term Treatment With Mim8 in People With Haemophilia A (FRONTIER 4)
Study Details
- Hemophilia A
- Hemophilia A With Inhibitor(s)
- Drug: Mim8
- Arm 1 \& 2:
- Inclusion Criteria:
- Informed consent obtained before any study related activities. Study related activities are any procedures that are carried out as part of the study, including activities to determine suitability for the study.
- Male or female with diagnosis of congenital haemophilia A based on medical records.
- Ongoing participation in study NN7769-4513, NN7769-4514, NN7769-4516, or NN7769-4728 at the time of transfer. Participant should qualify either of the following criteria:
- Participant from study NN7769-4513, who has participated in the extension part of the study for at least 12 weeks prior to enrolment in study NN7769-4532, or,
- Participant has completed the end of treatment visit for study NN7769-4514, NN7769-4516 or NN7769-4728.
- Participant and/or participant's parent(s)/participant's Legally acceptable representative (LAR) willingness and ability to comply with scheduled visits and study procedures, including the completion of diary.
- Exclusion Criteria:
- Any disorder, except for conditions associated with haemophilia A, which in the investigator's opinion might jeopardise participant's safety or compliance with the protocol.
- Participant who has discontinued or been withdrawn from studies NN7769-4513, NN7769-4514, NN7769-4516, or NN7769-4728.
- Previous participation in this study. Participation is defined as signed informed consent.
- Female who is pregnant, breast-feeding or intends to become pregnant.
- Female of child-bearing potential and not using a highly effective contraceptive method (highly effective contraceptive measures or as required by local regulation or practice).
- Participation (i.e., signed informed consent) in any interventional, clinical study (except from study NN7769-4513, NN7769-4514, NN7769-4516, or NN7769-4728) of an approved or non-approved investigational medicinal product.
- Any planned major surgery, during part 1 of the study.
- Mental incapacity, unwillingness to cooperate, or a language barrier precluding adequate understanding and cooperation.
- Arm 3:
- Inclusion criteria
- Informed consent obtained before any study-related activities. Study-related activities are any procedures that are carried out as part of the study, including activities to determine suitability for the study.
- Male or female with diagnosis of congenital severe haemophilia A (endogenous FVIII activity less than (\<) 1 percentage \[%\]) with or without FVIII inhibitors based on medical records.
- Aged \<1 year at the time of signing informed consent.
- Body weight greater than or equal to (≥) 3.2 kilograms at the time of signing informed consent.
- previously untreated patients (PUPs) or minimally treated patients (MTPs) (i.e., up to 5 days of exposure to haemophilia-related treatment such as plasma-derived FVIII, recombinant FVIII, fresh frozen plasma, cryoprecipitate, or whole blood products).
- Full-term pregnancy (gestational age ≥37 weeks).
- Participant's parent(s)/LAR(s) willingness and ability to comply with scheduled visits and Arm 3 (infant) procedures, including the completion of diary and patient reported outcome (PRO) questionnaire.
- Participants \<3 months of age must show no signs of active intracranial haemorrhage at screening. This is confirmed by cranial ultrasound performed according to local practice and regardless of delivery method.
- Receipt of vitamin K prophylaxis (as per local standard practice).
- Availability of historical results in medical records for:
- a. activated partial thromboplastin time (aPTT) b. FVIII levels.
- Availability of historical results in medical records or pre-dose sample taken for:
- fibrinogen
- haematology parameters
- biochemistry parameters (aspartate aminotransferase (AST) and/or alanine aminotransferase (ALT), bilirubin and creatinine).
- Exclusion criteria
- Known or suspected hypersensitivity to trial product or related products.
- Previous participation in study 4532. Participation is defined as signed informed consent.
- Participation (i.e., signed informed consent) in any interventional clinical study with receipt of the last dose within 6 months (or 5 half-lives of the investigational medicinal product, whichever is shorter) before planned enrolment.
- Exposure to non-factor haemostatic products for bleeding prophylaxis within 6 months (or 5 half-lives of the medicinal product, whichever is shorter) before planned enrolment.
- Known congenital or acquired coagulation disorders other than haemophilia A.
- Other conditions (e.g., autoimmune disease) or laboratory abnormality that may increase the risk of bleeding or thrombosis, as evaluated by the investigator. Any disorder, except for conditions associated with haemophilia A, that in the investigator's opinion might jeopardise the participant's safety or compliance with the protocol.
- 8\. Lack of adequate parental/legally acceptable representative (LAR) support to enter accurately and timely information regarding treatment and bleeding episodes into an (electronic) diary.
- 9\. Previous or current treatment for thromboembolic disease (with the exception of previous catheter-associated thrombosis for which anti-thrombotic treatment is not currently ongoing) or signs of thromboembolic disease.
- 10\. Any planned major surgery, during part 1 of Arm 3 (infant). For definition of major surgery.
- 11\. Immune tolerance induction planned to take place after treatment initiation.
- 12\. Hepatic dysfunction defined as AST and/or ALT greater than (\>) 3 times the upper limit of normal (ULN) combined with total bilirubin \>1.5 times the ULN.
- 13\. Serum creatinine above 1.5 times the ULN.
Protocol Summary
This study is looking at how safe it is to switch from emicizumab to Mim8, in people with haemophilia A. Mim8 is a new medicine that is used to prevent bleeding episodes in people with haemophilia A. Mim8 works by replacing the function of the missing clotting factor VIII (FVIII). Mim8 will be injected under the skin using a pen-injector either once every week, once every two weeks or once every month. The participants will be trained in using the pen injector. The participants can choose themselves, in collaboration with the study doctor how often they get Mim8 in this study. When the participant will get their first Mim8 injection depends on their current treatment with emicizumab. The participants will get their first Mim8 injection at Visit 2. Participants will have between 6 and 27 Mim8 injections. The total number of injections participants will have depends on their dosing frequency. The study will last for about 6-12 months. While taking part in this study, there are some restrictions about what medicine participant can use. The study doctor will tell the participants more about this. In case the participants experience bleeds, these can be treated with additional haemostatic medicine as agreed with the study doctor. Female participants cannot take part if they are pregnant, breast-feeding or plan to get pregnant during the study period.