- ICH GCP
- Registre américain des essais cliniques
- Essai clinique NCT01930032
Pathogenic Mechanisms in C Diff Infection and Colitis
Pathogenic Mechanisms in Clostridium Difficile Infection and Colitis
The purpose of this study is to learn more about infection by Clostridium difficile (also known as C. difficile). C. difficile is a common bacterium (a germ that may cause disease) that can live in the human gut. Some people have it without having any symptoms. In other people it can cause illness ranging from mild diarrhea to severe colitis (infection of the colon).
C. difficile makes toxins that damage the cells that line the colon. The study doctors want to find out how these toxins cause damage to the cells in the colon.
Aperçu de l'étude
Statut
Les conditions
Description détaillée
The purpose of this study is to examine pathogenic mechanisms of Clostridium difficile toxin-mediated intestinal injury and inflammation. Two primary mechanisms will be examined.
- To examine the hypothesis is that microRNA expression profiles are dysregulated by Clostridium difficile toxin exposure and that dysregulation of miRNA expression plays a role in the pathogenesis of C. difficile associated diseases.
- To examine the hypothesis is that the TLR9 receptor mediates key inflammatory events in response to Clostridium difficile toxin exposure.
Type d'étude
Inscription (Réel)
Contacts et emplacements
Lieux d'étude
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Massachusetts
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Boston, Massachusetts, États-Unis, 02215
- Beth Israel Deaconess 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:
- Age greater than 18 yrs and less than 75 years
- Undergoing a clinically indicated colonoscopy
Exclusion Criteria:
- Known, active or recurrent colonic disease including: Clostridium difficile infection, inflammatory bowel disease, microscopic colitis, colon resection for any reason, ischemic colitis, recurrent diverticulitis, colon cancer. Note: Diverticulosis without recurrent diverticulitis, colonic adenomatous or hyperplastic polyps or colonic arteriovenous malformations will not constitute an exclusion
- Diarrhea (an average of more than 3 bowel movements per day at baseline)
- Constipation (an average of fewer than 2 bowel movements per week at baseline).
- Use of systemic steroid or systemic immunosuppressive medication
- Severe renal impairment
- Relative contraindication to colon biopsy including a bleeding diathesis or anti-coagulant use. Note: nonsteroidal antiinflammatory drug or asprin use will not constitute a contra-indication.
Plan d'étude
Comment l'étude est-elle conçue ?
Détails de conception
Cohortes et interventions
Groupe / Cohorte |
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Tous les sujets
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Que mesure l'étude ?
Principaux critères de jugement
Mesure des résultats |
Description de la mesure |
Délai |
|---|---|---|
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Binding of Toxin A (and B) to TLR9 on the human colorectal epithelial cell surface
Délai: 24 hours
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As assessed by confocal fluorescence microscopy
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24 hours
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Mesures de résultats secondaires
Mesure des résultats |
Description de la mesure |
Délai |
|---|---|---|
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effects of a TLR9 antagonist (ODN-TTAGGG) on toxin binding
Délai: 0 hours
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The change of mean toxin fluorescence on colonocytes will be measured by confocal microscopy using quantitative image analysis software.
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0 hours
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Binding of Toxin A (and B) to TLR9 on the human colorectal epithelial cell surface
Délai: 0 hours
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as assessed by confocal fluorescence microscopy
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0 hours
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Binding of Toxin A (and B) to TLR9 on the human colorectal epithelial cell surface
Délai: 6 hours
|
As assessed by confocal fluorescence microscopy
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6 hours
|
|
Effects of a TLR9 antagonist (ODN-TTAGGG) on toxin binding
Délai: 6 hours
|
The change of mean toxin fluorescence on colonocytes will be measured by confocal microscopy using quantitative image analysis software.
|
6 hours
|
|
Effects of a TLR9 antagonist (ODN-TTAGGG) on toxin binding
Délai: 24 hours
|
The change of mean toxin fluorescence on colonocytes will be measured by confocal microscopy using quantitative image analysis software.
|
24 hours
|
Collaborateurs et enquêteurs
Parrainer
Dates d'enregistrement des études
Dates principales de l'étude
Début de l'étude
Achèvement primaire (Réel)
Achèvement de l'étude (Réel)
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
- Maladies du système digestif
- Processus pathologiques
- Attributs de la maladie
- Maladies gastro-intestinales
- Gastro-entérite
- Maladies du côlon
- Maladies intestinales
- Infections bactériennes
- Infections bactériennes et mycoses
- Infections bactériennes à Gram positif
- Infections
- Maladies transmissibles
- Colite
- Infections à Clostridium
Autres numéros d'identification d'étude
- 2013P000174
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