Inflammatory Signature of Human Chorionic Cells (TROPHY)

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT01767649
Recruitment Status : Completed
First Posted : January 14, 2013
Last Update Posted : December 23, 2014
Information provided by (Responsible Party):
Assistance Publique - Hôpitaux de Paris

Brief Summary:
The purpose of this study is to identify molecules produced specifically by the cells from the chorionic membranes of the materno-fetal interface ("the water bag") sign for the activation of preterm labor.

Condition or disease Intervention/treatment
Pregnancy Other: Caesarean Other: Vaginal delivery

Detailed Description:

· Background

During human gestation, fetal membranes (the "water bag") encompass the amnion, facing the amniotic cavity, and the chorion, lining the maternal decidua and comprising trophoblast cells. Membranes usually remain intact until their spontaneous rupture, close to the first stage of labor at term. Often seen as a simple inert shell, with a role of "airbag" for the developing fetus, the membranes provide yet a large surface of interaction between maternal and fetal tissues and function as a transient endocrine organ with immune properties. Indeed human parturition is tightly correlated with hormonal changes at the maternal-fetal interface during pregnancy, that may control cell interactions and chorio-decidua remodeling, the amnion remaining usually intact until the final break. Precocious remodeling may lead to a premature onset of labor, associated or not with premature rupture of membrane whether the cause is infectious or not. A better understanding of this membrane remodeling may thus offer new avenues to define biomarkers of preterm labor.

Hereof, the fact that the mother-to-be accepts and keeps the fetus for months within her womb has long being seen as an enigma, since the fetus is a semi-allograft, half of his genome being of paternal, thus of foreign, origin. This apparent paradox was deciphered by the demonstration of the set-up of an immunotolerance at the site of implantation through the education of maternal immune cells (Natural Killer and T cells) by the fetal trophoblast. This immunotolerance is normally maintained throughout pregnancy, and some recurrent spontaneous miscarriages have been shown to be due to the loss of this immunotolerance, which activates the rejection of the semi-allograft.

In this regard, remodeled fetal membranes overlying the cervix may discharge signals that could be detectable in cervicovaginal fluids and serve as biomarkers of the imminence of delivery. Such information on delivery timing may be of great importance for an adequate prediction that would change drastically the management of threatening preterm delivery.

· Current proposal The objective of this study is to characterize the fetal and maternal cells in the chorio-decidua during the remodeling of the membranes using our well-established cell model (Hervé et al. 2008, J Immunol).

Study Type : Observational
Actual Enrollment : 24 participants
Observational Model: Cohort
Time Perspective: Prospective
Official Title: Inflammatory Signature of Chorionic Cells as Markers of Premature Labor
Study Start Date : November 2010
Actual Primary Completion Date : May 2014
Actual Study Completion Date : November 2014

Group/Cohort Intervention/treatment
Normal pregnant women at term without complication during pregnancy and without inflammatory disorders
Other: Caesarean
Collection of tissues and blood
Vaginal Delivery
Normal pregnant women at term without complication during pregnancy and without inflammatory disorders
Other: Vaginal delivery
Collection of tissues and blood

Primary Outcome Measures :
  1. Protein overexpression [ Time Frame: 1 year ]
    Setting of measurements of proteins in the supernatant of chorionic cells

Biospecimen Retention:   Samples With DNA
Cord blood, placenta and maternal blood

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   Female
Accepts Healthy Volunteers:   No
Sampling Method:   Non-Probability Sample
Study Population
Normal pregnant women followed for their pregnancy in the maternity

Inclusion Criteria:

  • >18y old
  • Singleton
  • Normal pregnancy without complication
  • >37 weeks of gestation

Exclusion Criteria:

  • Minor
  • Without Health Insurance
  • Inflammatory Disorders (diabetes, twin, autoimmune disesses, etc)
  • Infection HIV, hepatitis

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT01767649

Paris, France, 75014
Sponsors and Collaborators
Assistance Publique - Hôpitaux de Paris
Principal Investigator: Céline Méhats, PhD Institut National de la Santé Et de la Recherche Médicale, France

Responsible Party: Assistance Publique - Hôpitaux de Paris Identifier: NCT01767649     History of Changes
Other Study ID Numbers: NI10056
First Posted: January 14, 2013    Key Record Dates
Last Update Posted: December 23, 2014
Last Verified: December 2014

Keywords provided by Assistance Publique - Hôpitaux de Paris:
Extracellular matrix