About this trial
The purpose of this study is to assess the efficacy and safety of nipocalimab in reducing the risk of severe fetal and neonatal alloimmune thrombocytopenia (FNAIT).
Eligibility criteria
This trial does not accept healthy volunteersQualifiers
Pregnant and an estimated gestational age (GA) from week 13* to 18 at visit 1
Has a history of greater than or equal to (>=) 1 prior pregnancy with FNAIT based on medical records including: a) neonatal platelet count less than (<) 150*10^9/Liter with no fetal/neonatal intracranial hemorrhage (ICH) or severe fetal/neonatal hemorrhage (standard-risk) OR b) fetus/neonate with ICH or severe hemorrhage in a fetus/neonate (high-risk)
Current pregnancy with presence of maternal anti-HPA-1a and/or anti-HPA-5b alloantibody and positive fetal HPA-1a and/or HPA-5b genotype as confirmed by cell-free fetal DNA in maternal blood
Health status considered stable by the investigator based on physical examination, medical history, vital signs, 12-lead electrocardiogram (ECG), and clinical laboratory tests performed at screening
Disqualifiers
Currently pregnant with multiple gestations (twins or more)
History of severe preeclampsia in a previous pregnancy
History of myocardial infarction, unstable ischemic heart disease, or stroke
Known allergies, hypersensitivity, or intolerance to nipocalimab or its excipients, to IVIG or to prednisone
Trial design
Parallel
Treatments tested in this trial
Nipocalimab
DrugNipocalimab will be administered intravenously.
Intravenous immunoglobulins (IVIG)
DrugIVIG will be administered intravenously.
Prednisone
DrugPrednisone will be administered orally.
Treatment groups
Trial outcomes
Primary outcomes
Fetus/Neonate with Outcome of Death or Adjudicated Severe Bleeding or Platelet Count Less Than (<) 30*10^9/L
Outcome of fetus/neonate death or adjudicated severe bleeding up to the first week post birth or platelet count \<30\*10\^9/L will be reported.
Secondary outcomes
Platelet Count at Birth in a Neonate
Platelet count at birth in a neonate will be reported.
Neonate/Fetus with Outcome of Death
Fetus/neonate with outcome of death will be reported.
Neonate with Platelet Count at Birth <10*10^9/L
Platelet count at birth \<10\*10\^9/L in a neonate will be reported.
Neonate with Platelet Count at Birth <30*10^9/L
Platelet count at birth \<30\*10\^9/L in a neonate will be reported.
Sponsors and contacts
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