- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT00456118
Study of the Role of Tissular Maternofetal Alloimmunization in Placentation Pathologies
Justification:
We have recently demonstrated that maternofetal alloimmunization was not limited to blood cells: maternal alloimmunization against a glomerular podocyte antigen expressed by the placenta can induce neonatal membranous glomerulonephritis.
Early recurrent pregnancy losses, preeclampsia and intervillositis are obstetrical pathologies which share an anomaly of placentation. Pathophysiology of these diseases is not yet fully understood; nevertheless the hypothesis of an incompatibility between mother and child is often mentioned. The aim of this project is to detect and study the cases of recurrent pregnancy losses, preeclamspia and intervillositis which could be induced by tissular maternofetal alloimmunization.
Materials and methods:
Patients suffering from recurrent pregnancy losses of unknown origin, preeclamspia or intervillositis will be included in this project. Mothers' sera will be studied by indirect immunofluorescence and Western Blot on placental biopsies from different origins and gestational ages. This stage will enable us to detect possible maternal allo-antibodies. After detecting and revealing antibodies, nature of the target antigen will be identified by immunoprecipitation of placental extracts, using the positive sera. Immunoprecipitation will be followed by a mass spectrometry analysis of detected proteins.
Expected results:
This study will enable us:
- to detect new cases of tissular maternofetal alloimmunization
- to improve our knowledge of mechanisms leading to anomalies of placentation
- to carry out a specific, preventive therapeutic approach for cases induced by tissular alloimmunization.
Key words:
Recurrent pregnancy losses, Preeclampsia, Intervillositis, maternofetal alloimmunization.
Study Overview
Status
Study Type
Enrollment (Actual)
Contacts and Locations
Study Locations
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Bordeaux, France, 33076
- Bordeaux university hospital
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Limoges, France, 87042
- Limoges university hospital
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Paris, France, 75020
- Tenon Hospital
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Paris, France, 75012
- Saint Antoine Hospital
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Paris, France, 75571
- Trousseau Hospital
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Saint Pierre, France, 97448
- South Reunion Hospital
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Toulouse, France, 31059
- Toulouse University Hospital
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Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Sampling Method
Study Population
Description
Inclusion Criteria:
- Recurrent pregnancy losses : patient having or having suffered from at least 3 consecutive, unexplained recurrent pregnancy losses, during the first 3 months of pregnancy, with the same paerson/man.
- Preeclampsia : blood pressure > 140/90 mm Hg ; proteinuria > 0,3 g/ 24 h
- Intervillositis : patient suffering or having suffered from intervillositis
Exclusion Criteria:
- Recurrent pregnancy losses : uterine pathology, endocrine pathology, autoimmune pathology, coagulation and hemostasis pathology, karyotype anomaly.
- Preeclampsia : pre-existing high blood pressure, pre-existing diabetes, pre-existing renal disease, antiphospholipid antibodies syndrome
- Intervillositis : intervillositis with villositis
Study Plan
How is the study designed?
Design Details
Cohorts and Interventions
Group / Cohort |
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repeated miscarriages
60 womens for repeated miscarriages will be included
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Preeclampsia
70 women for pre-eclampsia will be included
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intervillites
20 women for intervillites will be included
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Collaborators and Investigators
Sponsor
Study record dates
Study Major Dates
Study Start
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- I06014
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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