Removal of Anti-Angiogenic Proteins in Preeclampsia Before Delivery (RAAPID-II)
Preeclampsia is a syndrome that occurs in approximately 3% to 8% of pregnancies and is associated with considerable maternal and neonatal morbidity and mortality. Except for termination of the pregnancy, effective treatments/preventative measures for preeclampsia are lacking. Although prolongation of pregnancy benefits the fetus, it is detrimental to the mother, and is associated with hypertension, proteinuria, and symptoms that suggest kidney, brain, liver and cardiovascular system involvement.
Placental soluble fms-like tyrosine kinase 1 (sFlt-1) is elevated in women with preeclampsia, with levels that fall after delivery. sFlt-1 is a variant of the vascular endothelial growth factor (VEGF) receptor Flt-1, and in the circulation, acts as a potent VEGF and placental growth factor (PlGF) antagonist. Given that sFlt-1 levels are elevated in preeclampsia, we are investigating if removal of sFlt-1 from the plasma of women with preeclampsia can improve maternal and fetal outcomes.
Short-term extracorporeal adsorption pheresis with the LIPOSORBER LA-15 System will be the primary intervention using methods that have been previously applied in pregnant women with familial hypercholesterolemia.
Device: Apheresis using Liposorber LA-15 System
|Study Design:||Endpoint Classification: Safety/Efficacy Study
Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Prevention
|Official Title:||Phase 1b Proof-of-Concept Study of Apheresis to Reduce Soluble Fms-like Tyrosine Kinase-1 (sFlt-1) in Pregnant Women With Preeclampsia Using a Dextran Sulfate Adsorption (DSA) Column (LIPOSORBER® LA-15 System)|
- Reduction of sFlt-1 levels in maternal blood (first week of pheresis) measured immediately before pheresis therapy and at 2, 4, 12, 24, 48, 72, 96, 120 and 144 hours following termination of the pheresis therapy. [ Time Frame: 12 months ] [ Designated as safety issue: No ]The study period for each patient will be from initiation of the device until 30 days (± 7 days) after delivery. Additional assessments will be performed at 90 and 365 days (± 7 days, respectively) using maternal and neonatal medical records and/or by telephone contact with the mother.
- Maternal and fetal safety [ Time Frame: 12 months ] [ Designated as safety issue: Yes ]
Blood pressure, proteinuria, coagulation parameters, elevated liver enzymes, and low platelet count (HELLP) syndrome, maternal complications
Early fetal assessments including neonatal intensive care unit (NICU) admission, fetal APGAR scores, cerebral hemorrhage, pulmonary parameters, respiratory distress (eg, requirement for ventilation support), ischemic colitis, and retinopathy will be recorded.
- Maternal and fetal efficacy [ Time Frame: 12 months ] [ Designated as safety issue: No ]
Prolongation of pregnancy, reduction in blood pressure and proteinuria
Outcomes will be collected on all births, at birth, 24-hours post-partum, 72-hours post-partum, 30 day status vs historical milestones. 90 and 365 day assessments will be made using data obtained from medical records. Fetal parameters to be collected include biophysical profile, measurements of size and weight, pH of umbilical arterial blood, APGAR scores (1'/5'/10'), body weight and length, head circumference and physical examination, selected laboratory values.
|Study Start Date:||June 2013|
|Estimated Study Completion Date:||June 2014|
|Estimated Primary Completion Date:||June 2014 (Final data collection date for primary outcome measure)|
Apheresis using Liposorber LA-15 System
Device: Apheresis using Liposorber LA-15 System
The Liposorber LA-15 Device is a dextran sulfate cellulose column, one of several currently approved in Europe and United States for pheresis of lipoproteins in the treatment of familial hypercholesterolemia. Such devices have been in use for over 30 years. Published experience in pregnant women with familial hypercholesterolemia suggests that lipoprotein pheresis can be safely used in pregnancy after appropriate individual benefit/risk assessment for both mother and fetus is considered. The Liposorber LA-15 system selected for this trial has been evaluated for its ability to efficiently and selectively remove sFlt-1 in vitro.
The primary objective of this trial is to determine whether short-term pheresis using a dextran sulfate adsorption (DSA) column (Liposorber LA-15 System; the Device) leads to a reduction in circulating sFLT-1 in the blood of women with pre-term preeclampsia.
The following secondary objectives are aimed at evaluating the efficacy and safety of the Device as well as the impact of removing circulating sFlt-1 on maternal and neonatal outcomes:
To determine whether short-term pheresis using the Device in women with pre-term preeclampsia leads to:
- a prolongation of pregnancy (ie, gestational age)
- a reduction in blood pressure (BP) and proteinuria
- an increase in fetal birth weight
- To determine the safety of reducing maternal sFlt-1 levels using the Device.
Up to 12 patients will be enrolled. Initially, 3 patients will undergo pheresis up to 2 times in the first week and undergo all protocol-related assessments including PK of sFlt-1 levels. Based on an assessment of clinical response by the Investigator, the first 3 patients will be offered the option to continue pheresis treatments (without pharmacokinetic [PK] assessments) up to twice weekly until delivery or until 34 weeks gestation, whichever comes first. Following complete review of all parameters and outcomes by an independent Data Safety Monitoring Board (DSMB), up to 9 additional patients will be enrolled, with DSMB review after every 3 patients/delivered infants, and undergo pheresis with the Device in a similar or modified schedule (up to 3 times per week) to be based on data collected in the first 3 patients.
|Contact: Ravi I Thadhani, MD, MPHfirstname.lastname@example.org|
|United States, Massachusetts|
|Massachusetts General Hospital||Active, not recruiting|
|Boston, Massachusetts, United States, 02116|
|University Hospital of Cologne (Universitat zu Koln)||Recruiting|
|Köln, Germany, 50923|
|Contact: Thomas Benzing, Prof +49 221 478 4480 email@example.com|
|Principal Investigator: Thomas Benzing, Prof|
|University Hospital Leipzig||Recruiting|
|Contact: Holger Stepan, MD 0049-341-9723595 Holger.Stepan@medizin.uni-leipzig.de|
|Principal Investigator: Holger Stepan, MD|
|Principal Investigator:||Ravi I Thadhani, MD, MPH||Massachusetts General Hospital|
|Principal Investigator:||Thomas Benzing, MD||University of Koln|
|Principal Investigator:||Holger Stepan, MD||University Hospital Leipzig|