Marinobufagenin as a Target for DIGIBIND in Preeclampsia
|First Submitted Date||April 1, 2011|
|First Posted Date||April 4, 2011|
|Last Update Posted Date||July 2, 2017|
|Start Date||August 16, 2006|
|Primary Completion Date||Not Provided|
|Current Primary Outcome Measures||Not Provided|
|Original Primary Outcome Measures||Not Provided|
|Change History||Complete list of historical versions of study NCT01328600 on ClinicalTrials.gov Archive Site|
|Current Secondary Outcome Measures||Not Provided|
|Original Secondary Outcome Measures||Not Provided|
|Current Other Outcome Measures||Not Provided|
|Original Other Outcome Measures||Not Provided|
|Brief Title||Marinobufagenin as a Target for DIGIBIND in Preeclampsia|
|Official Title||Marinobufagenin as a Target for DIGIBIND in Preeclampsia|
- To study whether the blood pressure treatment drug DIGIBIND specifically acts on marinobufagenin levels in the blood of pregnant women.
- Women between 18 and 50 years of age who are 34 to 39 weeks pregnant and have preeclampsia.
Preeclampsia (PE) complicates from 5 to 10% of pregnancies and it is a number one cause of maternal and fetal morbidity and mortality worldwide. Nevertheless, a specific and highly effective therapy of this disorder does not exist. As illustrated by therapeutic efficacy of anti-digoxin antibody (DIGIBIND) in preeclampsia, endogenous digitalis-like sodium pump ligands play an important role in the pathogenesis of this syndrome. Previously, we demonstrated that levels of endogenous bufadienolide Na/KATPase inhibitors are elevated in patients with PE, and that antibody to marinobufagenin lower blood pressure in rats with pregnancy-induced hypertension and ex vivo reverse inhibition of the Na/K-ATPase from erythrocytes from patients with PE. Most recently, we developed three anti-MBG monoclonal antibodies which in lower blood pressure in several rat experimental models.
We are proposing a pilot proof-of concept study aimed to demonstrate that MBG is target for DIGIBIND in preeclampsia. If successful, this trial will provide basis for the development of a clinically-usable anti-MBG monoclonal antibody. We hypothesize that in patients with preeclampsia DIGIBIND induces vasorelaxation due to blockade of circulating MBG. The specific aims of the study are to demonstrate that isolated perfused preeclamptic placentae ex vivo release MBG at concentration sufficient to induce vasoconstriction that DIGIBIND reverses vasoconstriction induced by placental perfusate, and that vasorelaxant effect of DIGIBIND is due to blockade of MBG.
The study population will be pregnant women (18-50 years), 34-39 weeks of fetal gestational age with preeclampsia The primary outcome of the study variable will be the difference in the vascular tone in isolated perfused cotyledons. The secondary outcomes will be: (i) the degree of MBG binding to DIGIBIND at different time points following DIGIBIND administration, (ii) the effect of DIGIBIND on the activity of Na/K-ATPase in erythrocytes, and (iii) the ex vivo effect of DIGIBIND on the vascular tone in the isolated placental lobes.
|Study Design||Time Perspective: Other|
|Target Follow-Up Duration||Not Provided|
|Sampling Method||Not Provided|
|Study Population||Not Provided|
|Study Groups/Cohorts||Not Provided|
* Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
|Estimated Completion Date||July 29, 2014|
|Primary Completion Date||Not Provided|
|Ages||18 Years to 50 Years (Adult)|
|Accepts Healthy Volunteers||No|
|Contacts||Contact information is only displayed when the study is recruiting subjects|
|Listed Location Countries||Russian Federation|
|Removed Location Countries|
|Other Study ID Numbers||999906259
|Has Data Monitoring Committee||Not Provided|
|U.S. FDA-regulated Product||Not Provided|
|IPD Sharing Statement||Not Provided|
|Responsible Party||National Institutes of Health Clinical Center (CC) ( National Institute on Aging (NIA) )|
|Study Sponsor||National Institute on Aging (NIA)|
|PRS Account||National Institutes of Health Clinical Center (CC)|
|Verification Date||July 29, 2014|