A Pilot Study for Toxicity Evaluation of HIV Rectal Microbicides
The purpose of this study is to determine if detectable changes in permeability of the lining of the colon are caused by either application of HIV microbicide gels or medical procedures, such as flexible sigmoidoscopy.
Procedure: Gastrointestinal instrumentation
|Study Design:||Allocation: Randomized
Endpoint Classification: Safety Study
Intervention Model: Crossover Assignment
Primary Purpose: Diagnostic
|Official Title:||A Pilot Protocol to Determine the Effects of Chemical and Mechanical Stress on Rectal Permeability as a Surrogate for Toxicity Evaluation of Rectally Applied Microbicides|
- Intra-subject comparison of urine and plasma concentrations of 99mTc-DTPA [ Time Frame: 0-2 hours, 2-4 hours, 4-8 hours, 8-12 hours and 12-24 hours after introduction of the treatment assignment ]
|Study Start Date:||April 2007|
It is not currently known if procedures used to observe the lining of the distal colon, such as endoscopy with or without pinch biopsy, may cause mucosal trauma and thus alter colonic permeability. Additionally, the application of topical HIV microbicides (to prevent HIV transmission) and shearing forces associated with rectal intercourse might also adversely affect the epithelial layer, and thus alter colonic permeability. In order to appropriately interpret testing of the effects of topical HIV microbicides on the mucosal lining of the distal colon, it is essential to understand whether these procedures themselves, adversely affect the epithelial layer. If changes in permeability can be detected, this method may be developed to help determine microbicide distribution/toxicity in early phase studies, thus improving the selection of candidate microbicides for study in larger scale clinical trials.
|United States, Maryland|
|The Johns Hopkins Hospital|
|Baltimore, Maryland, United States, 21287|
|Principal Investigator:||Edward Fuchs, PA-C, MBA||The Johns Hopkins University|