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- Essai clinique NCT00425867
PAR Family Polymorphisms and Placental Invasion Disorders
Aperçu de l'étude
Statut
Les conditions
Intervention / Traitement
Description détaillée
Polymorphisms of Protease Activated Receptor 1 and adverse pregnancy outcomes Protease Activated Receptor 1 (PAR1), the main thrombin receptor on vascular cells (Coughlin,1999), plays a critical role in orchestrating human placentation based on temporally and spatially constrained PAR1 expression in the normal invasive trophoblasts (O'Brien et al, 2003) and its overexpression in pathological invasive trophoblast (Even-Ram et al, 2003).
Various proteases of the PAR family as well as matrix metalloproteinases have been implicated in ancillary regulation of cancer metastases and tumor-related angiogenesis. PAR1 in particular has been proposed to be involved in invasive processes of various cancers (Ruf & Mueller, 2006; Boire et al, 2005). Similarly, it might be surmised that remodeling of the placenta microenvironment as well as the requisites of trophoblast invasiveness may be PAR1 sensitive (Grisaru-Granovsky et al, 2005). Therefore, one might hypothesize that PAR1 gene variability may be involved in early placentation and that adverse pregnancy outcomes of the "placental syndromes" may have their origin in PAR1 dysregulation.
Study Design: This is a prospective case-control pilot study. Subject enrolment and data collection will be performed via the Admission Service of the Division for Maternal & Fetal Medicine in a large tertiary obstetrics department in Jerusalem, Israel. Demographic data including maternal characteristics, past reproductive history, and information about previous complications during pregnancy, delivery and the neonatal period will be culled. The blood samples will be collected at routine admission after obtaining informed consent by the physician on the floor.
Four groups are described: patients with spontaneous preterm delivery of a singleton before 35 weeks of gestation; patients with a singleton pregnancy complicated by preeclampsia diagnosed according the Working Group Criteria (2000); patients who deliver a small for gestational age (SGA) singleton defined as a birth weight below the 10th percentile for the gestational age according to the Israeli growth curves (Dollberg et al, 2005); and for comparison, patients who deliver a singleton at term with appropriate size for gestational age. Patients who suffer delivery with intrauterine fetal demise and/or neonates with malformations will be excluded.
Maternal and umbilical cord blood samples (in 0.11mol/l sodium tri citrate) will be paired. DNA will be prepared from white blood cells by standard techniques and subsequently stored at -4°C for batched analysis. The laboratory staff will be blinded as to the clinical status of the samples.
Polymorphism analysis will be performed for the following polymorphisms of the PAR1 gene: [-1426CT], [506 insertion of 13 bp],[IVS-14A/T]: as per standard PCR techniques using appropriate restriction endonucleases (Arnaud et l, 2000).
Type d'étude
Inscription
Contacts et emplacements
Coordonnées de l'étude
- Nom: Sorina Grisaru, MD
- Numéro de téléphone: 97226555111
- E-mail: granovsky@netvision.net.il
Critères de participation
Critère d'éligibilité
Âges éligibles pour étudier
Accepte les volontaires sains
Sexes éligibles pour l'étude
La description
Inclusion Criteria:
- Women with reccurent abortions unexplained
- Premature delicery
Exclusion Criteria:
- Term pregnancies
- Abortion that the cause is known
Plan d'étude
Comment l'étude est-elle conçue ?
Détails de conception
Collaborateurs et enquêteurs
Parrainer
Les enquêteurs
- Chercheur principal: Sorina Grisaru, MD, Shaare Zedek Medical Center
Publications et liens utiles
Liens utiles
Dates d'enregistrement des études
Dates principales de l'étude
Début de l'étude
Achèvement de l'étude
Dates d'inscription aux études
Première soumission
Première soumission répondant aux critères de contrôle qualité
Première publication (Estimation)
Mises à jour des dossiers d'étude
Dernière mise à jour publiée (Estimation)
Dernière mise à jour soumise répondant aux critères de contrôle qualité
Dernière vérification
Plus d'information
Termes liés à cette étude
Termes MeSH pertinents supplémentaires
Autres numéros d'identification d'étude
- PAR1 polymorphisms
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