- ICH GCP
- Amerikanska kliniska prövningsregistret
- Klinisk prövning 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.
Studieöversikt
Status
Betingelser
Detaljerad beskrivning
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.
Studietyp
Inskrivning (Faktisk)
Kontakter och platser
Studieorter
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Massachusetts
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Boston, Massachusetts, Förenta staterna, 02215
- Beth Israel Deaconess Medical Center
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Deltagandekriterier
Urvalskriterier
Åldrar som är berättigade till studier
Tar emot friska volontärer
Kön som är behöriga för studier
Testmetod
Studera befolkning
Beskrivning
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
Hur är studien utformad?
Designdetaljer
Kohorter och interventioner
Grupp / Kohort |
|---|
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Alla ämnen
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Vad mäter studien?
Primära resultatmått
Resultatmått |
Åtgärdsbeskrivning |
Tidsram |
|---|---|---|
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Binding of Toxin A (and B) to TLR9 on the human colorectal epithelial cell surface
Tidsram: 24 hours
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As assessed by confocal fluorescence microscopy
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24 hours
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Sekundära resultatmått
Resultatmått |
Åtgärdsbeskrivning |
Tidsram |
|---|---|---|
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effects of a TLR9 antagonist (ODN-TTAGGG) on toxin binding
Tidsram: 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
Tidsram: 0 hours
|
as assessed by confocal fluorescence microscopy
|
0 hours
|
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Binding of Toxin A (and B) to TLR9 on the human colorectal epithelial cell surface
Tidsram: 6 hours
|
As assessed by confocal fluorescence microscopy
|
6 hours
|
|
Effects of a TLR9 antagonist (ODN-TTAGGG) on toxin binding
Tidsram: 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
Tidsram: 24 hours
|
The change of mean toxin fluorescence on colonocytes will be measured by confocal microscopy using quantitative image analysis software.
|
24 hours
|
Samarbetspartners och utredare
Studieavstämningsdatum
Studera stora datum
Studiestart
Primärt slutförande (Faktisk)
Avslutad studie (Faktisk)
Studieregistreringsdatum
Först inskickad
Först inskickad som uppfyllde QC-kriterierna
Första postat (Uppskatta)
Uppdateringar av studier
Senaste uppdatering publicerad (Faktisk)
Senaste inskickade uppdateringen som uppfyllde QC-kriterierna
Senast verifierad
Mer information
Termer relaterade till denna studie
Nyckelord
Ytterligare relevanta MeSH-villkor
- Matsmältningssystemets sjukdomar
- Patologiska processer
- Sjukdomsegenskaper
- Gastrointestinala sjukdomar
- Gastroenterit
- Kolonsjukdomar
- Tarmsjukdomar
- Bakteriella infektioner
- Bakteriella infektioner och mykoser
- Gram-positiva bakteriella infektioner
- Infektioner
- Smittsamma sjukdomar
- Kolit
- Clostridium infektioner
Andra studie-ID-nummer
- 2013P000174
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