prospective, non-interventional study to evaluate immunogenicity of aryoseven

Conditions: Hemophilia A With Inhibitor; Hemophilia B With Inhibitor; Factor VII Deficiency; Glanzmann's Thrombasthenia

Summary: this study evaluates the immunogenicity of the biosimilar rfviia (aryoseven) in subjects receiving aryoseven in real-life clinical practice.

this is a non-interventional, observational, prospective evaluation of immunogenicity (neutralizing antibodies toward fvii) of patients with hemophilia a or b with inhibitors, factor vii deficiency, glanzmann's thrombasthenia, who have received one or more dose of aryoseven in the daily practice. this study is conducted in iran where aryoseven is available on the market since 21-8-2012 and novoseven is no longer available since 2013. patients will be retrieved from the iranian registry of hemophilia patients of matha (iranian hemophilia and thrombophilia association, tehran, iran). the registry patient screener will sequentially review patients in the registry to identify patients who have received treatment with aryoseven, in reverse chronological order of inclusion in the registry, starting from a date 6 months prior to the date of this study and until when the sample size to enroll (200 patients) is completed. patients identified will be called for a visit (screening visit) for providing informed consent, interview, and blood sampling collection for prospective immunogenicity testing. retrospective data collection, including previous immunogenicity status and the number of exposure days, will be performed on hospital records, patient diary. immunogenicity will be tested by a centralized laboratory in iran using the pt-based bethesda assay. patients will be enrolled if they had an immunogenicity test negative, performed at the earliest time after novoseven was no longer available in iran. patients who do not have a previous negative immunogenicity test will be enrolled if negative at immunogenicity test performed during screening for this study. patients enrolled will be followed for at least 12 months for immunogenicity and adverse drug reactions. patients who have a positive previous immunogenicity test or results positive at immunogenicity test performed at screening (patients without a previous immunogenicity test), will not be enrolled, but registered and followed for 12 months (or longer) to collect data on the natural history of their disease.

Eligibility criteria:
inclusion criteria: * patients with hemophilia a or b with inhibitors, factor vii deficiency, glanzmann's thrombasthenia * treated with aryoseven in the daily practice, * signed informed consent (parents for children). * an immunogenicity test negative, performed at the earliest time after novoseven was no longer available in iran. patients who do not have a previous negative immunogenicity test should be enrolled if negative at immunogenicity test performed during screening for this study. exclusion criteria: * patients who received novoseven for any indication at any time before inclusion in the study, until an immunogenicity test excluded the development of immunogenicity related to novoseven. * parallel participation in another experimental drug trial. * parallel participation in another marketed drug trial (except for aryoseven) that may affect the immunogenicity endpoint of the study.