- ICH GCP
- Registre américain des essais cliniques
- Essai clinique NCT01106209
Neutrophil Extracellular Trap Formation in Newborn Infants at Risk for Inflammatory Syndromes
Aperçu de l'étude
Statut
Les conditions
Description détaillée
Prematurely born infants are at risk for necrotizing enterocolitis (NEC), the most common gastrointestinal emergency encountered in the newborn intensive care unit. This disease occurs in between 5 - 10% of infants born at less than 30 weeks gestation or less than 1500 grams birth weight. In these patients, NEC routinely develops during the 3rd or 4th week of life. NEC rarely occurs in infants born closer to term; for these patients NEC usually develops during the 1st week of life. So far, no one has explained the inverse relationship between gestational age at birth and the delay in NEC development.
Recently, our laboratory described for the first time an inherent deficiency of innate immunity in newborn infants - failure of neutrophil extracellular trap formation. Neutrophil extracellular traps or NETs are complex lattices of extracellular chromatin and DNA decorated with anti-microbial proteins and degradative enzymes which trap and kill microbes. When the neutrophils of newborn infants develop the ability to form NETs and whether the maturation of NET formation correlates with development of NEC in at risk infants remains unknown.
We have therefore undertaken the following study best described as a prospective, in vitro longitudinal cellular biology study of LPS/PAF-stimulated PMNs isolated from the cord and peripheral blood of premature infants at risk for NEC and from term infants not considered at risk for NEC. We will also assay for NET formation in gastrointestinal tissue samples obtained at the time of surgery for severe NEC in enrolled prematurely born infants. These studies are the first of their kind and aim to answer these important questions.
Type d'étude
Inscription (Anticipé)
Contacts et emplacements
Lieux d'étude
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Utah
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Salt Lake City, Utah, États-Unis, 84108
- University of Utah
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Salt Lake City, Utah, États-Unis, 84112
- Primary Children's Medical Center
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Critères de participation
Critère d'éligibilité
Âges éligibles pour étudier
Accepte les volontaires sains
Sexes éligibles pour l'étude
Méthode d'échantillonnage
Population étudiée
La description
Inclusion Criteria:
- Preterm infant patients delivered at UUMC and hospitalized in the NICU who are ≤ 1500 grams or <30 weeks gestational age at birth
- Term infants delivered at UUMC without complication, either via cesarean section or vaginal delivery
- Infants admitted to the PCMC same-day surgery unit in preparation for elective surgery within the first year of life.
Exclusion Criteria:
- No other exclusion criteria
Plan d'étude
Comment l'étude est-elle conçue ?
Détails de conception
- Modèles d'observation: Cohorte
- Perspectives temporelles: Éventuel
Cohortes et interventions
Groupe / Cohorte |
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Prematurely born infants in the NICU
Preterm infant patients delivered at UUMC and hospitalized in the NICU who are ≤1500 grams or <30 weeks gestational age at birth
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Healthy term infants
Term infants delivered at UUMC without complication, either via cesarean section or vaginal delivery
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Infants having surgery at <1 year old
Infants admitted to the PCMC same-day surgery unit in preparation for elective surgery within the first year of life
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Que mesure l'étude ?
Principaux critères de jugement
Mesure des résultats |
Description de la mesure |
Délai |
---|---|---|
Time to Maturation of Neutrophil Extracellular Trap(NET) Formation
Délai: 5 years
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The objective is to characterize the time to maturation of NET formation capability in polymorphonuclear leukocytes(PMNs)isolated from newborn infants.
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5 years
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Mesures de résultats secondaires
Mesure des résultats |
Description de la mesure |
Délai |
---|---|---|
Determine Whether NETs Contribute to the Pathogenesis of Necrotizing Enterocolitis(NEC)
Délai: 5 years
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The purpose is to determine if NET formation contributes to the pathogenesis of NEC by inappropriately releasing degradative proteins and tissue destructive enzymes into the inflammatory milieu of the premature infant gastrointestinal tract following bacterial translocation.
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5 years
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Collaborateurs et enquêteurs
Parrainer
Collaborateurs
Les enquêteurs
- Chercheur principal: Christian C Yost, MD, University of Utah
Dates d'enregistrement des études
Dates principales de l'étude
Début de l'étude
Achèvement primaire (Anticipé)
Achèvement de l'étude (Anticipé)
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 (Réel)
Dernière mise à jour soumise répondant aux critères de contrôle qualité
Dernière vérification
Plus d'information
Termes liés à cette étude
Mots clés
Termes MeSH pertinents supplémentaires
Autres numéros d'identification d'étude
- 119244
- R01HD093826 (Subvention/contrat des NIH des États-Unis)
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