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Microbicides for HIV prevention: reality or hope?
1Magee-Womens Research Institute, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania 15213, USA. imcgowan@pitt.edu
Current Opinion in Infectious Diseases
|November 26, 2009
Summary
Despite early setbacks with vaginal microbicides for HIV prevention, newer candidates like tenofovir show promise. Ongoing research and improved development pathways offer hope for effective HIV prevention microbicides.
Area of Science:
- Virology
- Pharmacology
- Public Health
Background:
- Microbicides are substances designed to prevent sexually transmitted infections, including HIV.
- Previous microbicide development faced challenges with efficacy and safety, with some candidates increasing HIV risk.
Purpose of the Study:
- To review recent advancements in microbicide development for HIV prevention.
- To assess the potential for developing safe and effective microbicides.
Main Methods:
- Review of Phase 2B/3 effectiveness studies.
- Evaluation of preclinical and early clinical data for new candidates.
- Analysis of novel formulation platforms.
Main Results:
- Surfactant and polyanion microbicides showed limited or no effectiveness against HIV.
- Some earlier microbicides potentially increased HIV risk.
- Newer antiretroviral candidates, like tenofovir, demonstrate safety and efficacy in preclinical models and are in human trials.
- Vaginal ring technology is being developed to improve product use.
Conclusions:
- Microbicide development is challenging, with many candidates failing due to safety or efficacy concerns.
- Lessons learned have refined the development process.
- There is renewed hope for developing a safe and effective microbicide for HIV prevention.
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