- ICH GCP
- US Clinical Trials Registry
- Klinisk forsøg 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.
Studieoversigt
Status
Betingelser
Detaljeret beskrivelse
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.
Undersøgelsestype
Tilmelding (Faktiske)
Kontakter og lokationer
Studiesteder
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Massachusetts
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Boston, Massachusetts, Forenede Stater, 02215
- Beth Israel Deaconess Medical Center
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Deltagelseskriterier
Berettigelseskriterier
Aldre berettiget til at studere
Tager imod sunde frivillige
Køn, der er berettiget til at studere
Prøveudtagningsmetode
Studiebefolkning
Beskrivelse
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.
Studieplan
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
Kohorter og interventioner
Gruppe / kohorte |
|---|
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Alle fag
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Hvad måler undersøgelsen?
Primære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
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Binding of Toxin A (and B) to TLR9 on the human colorectal epithelial cell surface
Tidsramme: 24 hours
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As assessed by confocal fluorescence microscopy
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24 hours
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Sekundære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
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effects of a TLR9 antagonist (ODN-TTAGGG) on toxin binding
Tidsramme: 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
Tidsramme: 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
Tidsramme: 6 hours
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As assessed by confocal fluorescence microscopy
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6 hours
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Effects of a TLR9 antagonist (ODN-TTAGGG) on toxin binding
Tidsramme: 6 hours
|
The change of mean toxin fluorescence on colonocytes will be measured by confocal microscopy using quantitative image analysis software.
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6 hours
|
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Effects of a TLR9 antagonist (ODN-TTAGGG) on toxin binding
Tidsramme: 24 hours
|
The change of mean toxin fluorescence on colonocytes will be measured by confocal microscopy using quantitative image analysis software.
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24 hours
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Samarbejdspartnere og efterforskere
Datoer for undersøgelser
Studer store datoer
Studiestart
Primær færdiggørelse (Faktiske)
Studieafslutning (Faktiske)
Datoer for studieregistrering
Først indsendt
Først indsendt, der opfyldte QC-kriterier
Først opslået (Skøn)
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Faktiske)
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidst verificeret
Mere information
Begreber relateret til denne undersøgelse
Nøgleord
Yderligere relevante MeSH-vilkår
- Sygdomme i fordøjelsessystemet
- Patologiske processer
- Sygdomsegenskaber
- Gastrointestinale sygdomme
- Gastroenteritis
- Tyktarmssygdomme
- Tarmsygdomme
- Bakterielle infektioner
- Bakterielle infektioner og mykoser
- Gram-positive bakterielle infektioner
- Infektioner
- Overførbare sygdomme
- Colitis
- Clostridium infektioner
Andre undersøgelses-id-numre
- 2013P000174
Disse oplysninger blev hentet direkte fra webstedet clinicaltrials.gov uden ændringer. Hvis du har nogen anmodninger om at ændre, fjerne eller opdatere dine undersøgelsesoplysninger, bedes du kontakte register@clinicaltrials.gov. Så snart en ændring er implementeret på clinicaltrials.gov, vil denne også blive opdateret automatisk på vores hjemmeside .
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