The Combination HIV Antiretroviral Rectal Microbicide (CHARM) program addresses the critical need to develop a safe and effective rectal microbicide for the prevention of HIV infection acquired through unprotected anal intercourse. The overall goal of the project is to develop a rectal specific formulation of a combination antiretroviral microbicide. The candidate microbicides will include tenofovir, UC781, and a combination of tenofovir and UC781. The Program has three scientific projects and 3 scientific cores to support this goal. Project 1 will undertake the preclinical evaluation of microbicide safety and efficacy using a range of assays including colorectal cell lines and human intestinal explant tissue and will be conducted by Dr. Charlene Dezzutti at the University of Pittsburgh. Project 2 will exploit a recently developed transgenic murine model of HIV infection to evaluate product efficacy in an in vivo animal model and will be undertaken by Dr. Victor Garcia-Martinez at the University of Texas. Project 3 will undertake a series of pre-Phase 1 human studies that will provide preliminary data on the safety, pharmacokinetics, and efficacy of the microbicide candidates. A particular strength of these studies will be the ability to conduct ex vivo / in vitro infection studies on intestinal explants from participants who have been exposed to the microbicide product in vivo. The clinical studies will be undertaken at the University of Pittsburgh, UCLA, and the Johns Hopkins School of Medicine. Core A will provide administrative support for the study. Core B will provide regulatory and informatics support and will be directed by Dr. Henry Gabelnick who is the Executive Director of CONRAD, our corporate sponsor for this submission. Core C, based at the University of Pittsburgh, will be the Formulation Development Core. Core C will be led by Dr. Lisa Rohan and will develop rectal specific formulations that will be evaluated in an iterative process in Projects 1-3. It is hoped that by the end of the program, one or more rectal specific antiretroviral microbicides will have been generated that can be clinically evaluated in future Phase 1 rectal safety studies.
This grant proposal addresses the urgent need to develop new approaches to HIV prevention including topical microbicides for individuals who are at risk of HIV infection through unprotected receptive anal intercourse. These individuals remain a key focus of the ongoing HIV epidemic in the developed world and may also contribute to the HIV pandemic in Sub saharan Africa.
|Mcgowan, Ian; Cranston, Ross D; Duffill, Kathryn et al. (2015) A Phase 1 Randomized, Open Label, Rectal Safety, Acceptability, Pharmacokinetic, and Pharmacodynamic Study of Three Formulations of Tenofovir 1% Gel (the CHARM-01 Study). PLoS One 10:e0125363|
|Hiruy, Hiwot; Fuchs, Edward J; Marzinke, Mark A et al. (2015) A Phase 1 Randomized, Blinded Comparison of the Pharmacokinetics and Colonic Distribution of Three Candidate Rectal Microbicide Formulations of Tenofovir 1% Gel with Simulated Unprotected Sex (CHARM-02). AIDS Res Hum Retroviruses 31:1098-108|
|Hladik, Florian; Burgener, Adam; Ballweber, Lamar et al. (2015) Mucosal effects of tenofovir 1% gel. Elife 4:|
|Dezzutti, Charlene S; Russo, Julie; Wang, Lin et al. (2014) Development of HIV-1 rectal-specific microbicides and colonic tissue evaluation. PLoS One 9:e102585|
|McGowan, Ian; Dezzutti, Charlene (2014) Rectal microbicide development. Curr Top Microbiol Immunol 383:117-36|
|McGowan, Ian (2014) The development of rectal microbicides for HIV prevention. Expert Opin Drug Deliv 11:69-82|
|Wahl, Angela; Victor Garcia, J (2014) The use of BLT humanized mice to investigate the immune reconstitution of the gastrointestinal tract. J Immunol Methods 410:28-33|
|Rohan, Lisa C; Yang, Haitao; Wang, Lin (2013) Rectal pre-exposure prophylaxis (PrEP). Antiviral Res 100 Suppl:S17-24|
|Chateau, Morgan L; Denton, Paul W; Swanson, Michael D et al. (2013) Rectal transmission of transmitted/founder HIV-1 is efficiently prevented by topical 1% tenofovir in BLT humanized mice. PLoS One 8:e60024|
|Chateau, Morgan; Swanson, Michael D; Garcia, J Victor (2013) Inefficient vaginal transmission of tenofovir-resistant HIV-1. J Virol 87:1274-7|
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