HIV topical microbicides: steer the ship or run aground

Area of Science:

• Reproductive Health
• Infectious Disease Prevention
• Clinical Trial Design

Background:

• Six candidate microbicides for human immunodeficiency virus (HIV) prevention are slated for large-scale effectiveness trials.
• Current trial strategy may not efficiently address the critical question of whether intravaginal gels can prevent HIV transmission.

Purpose of the Study:

• To advocate for a reconsideration of the selection and design of upcoming HIV microbicide trials.
• To propose a focused approach to efficiently answer whether sulfonated polyanions in vaginal gels can block HIV attachment and prevent infection.

Main Methods:

• The study proposes a critical review of the current multi-candidate trial strategy.
• It suggests prioritizing a single trial for the most promising microbicide candidate(s).

Main Results:

• Entering multiple candidates into numerous trials may dilute research efforts and confuse findings.
• A consolidated trial approach is predicted to yield clearer results regarding microbicide efficacy.

Conclusions:

• A single, focused trial is recommended to determine the effectiveness of specific microbicides, like sulfonated polyanions, in preventing HIV.
• This strategy aims to conserve resources and accelerate the development of novel HIV protective concepts.