Featured Research

from universities, journals, and other organizations

Vaginal microbicide gel may offer a promising strategy for prevention and protection against HIV transmission

Date:
December 6, 2012
Source:
Public Library of Science
Summary:
A new study shows that a microbicide gel is highly effective in block infection by the AIDS virus in a non-human primate model. Scientists have described the gel's key ingredient, which are small peptides engineered to present a decoy to bind up the virus and prevent it from entering and infecting the cells of the body.

A new study shows that a microbicide gel is highly effective in block infection by the AIDS virus in a non-human primate model. In the paper published December 6 in the Open Access journal PLOS Pathogens, Dereuddre-Bosquet and colleagues from the European Combined Highly Active Anti-Retroviral Microbicides (CHAARM) Consortium describe the gel's key ingredient, which are small peptides engineered to present a decoy to bind up the virus and prevent it from entering and infecting the cells of the body. Because this is a gel it can be topically applied and could represent a powerful preventative agent against sexual transmission of HIV.

Worldwide, the scientific community is working on the development of a vaccine against HIV. Meanwhile, research is also focused on the reduction of the spread of the virus by the application of a microbicide gel to protect users during intercourse which is a time of first exposure to virus. To date, few treatments that block virus entry have shown promising protection.

Dereuddre-Bosquet et al. engineered peptides named "miniCD4s" because they mimic the CD4 receptor used by HIV to gain entry into immune cells of the body. The study shows that the miniCD4s blocks HIV entry into isolated cells in a dish and tissue models that mimic mucous membranes which are points of virus entry. The authors then formulated miniCD4s at 0.3% in a microbicide gel that was vaginally applied to six female cynomolgus macaques monkeys for one hour before the animals were given a high dose of the virus also in the vagina. This dose would ordinarily make the animals highly infection but instead, five of the six were completely protected from HIV infection. No trace of virus was found in any body tissue. They were also unable to detect any antibodies to the virus in the plasma of the animals, indicating that the virus was completely repelled and there was full protection.

This study provides a proof of principle that for a a promising strategy for the prevention and protection against HIV ransmission during sexual intercourse. Importantly, the protection was demonstrated in a non human primate model which represents an essential step prior needed to progress to a prospective clinical trial.


Story Source:

The above story is based on materials provided by Public Library of Science. Note: Materials may be edited for content and length.


Journal Reference:

  1. Nathalie Dereuddre-Bosquet, Laurence Morellato-Castillo, Joachim Brouwers, Patrick Augustijns, Kawthar Bouchemal, Gilles Ponchel, Oscar H. P. Ramos, Carolina Herrera, Martha Stefanidou, Robin Shattock, Leo Heyndrickx, Guido Vanham, Pascal Kessler, Roger Le Grand, Loïc Martin. MiniCD4 Microbicide Prevents HIV Infection of Human Mucosal Explants and Vaginal Transmission of SHIV162P3 in Cynomolgus Macaques. PLoS Pathogens, 2012; 8 (12): e1003071 DOI: 10.1371/journal.ppat.1003071

Cite This Page:

Public Library of Science. "Vaginal microbicide gel may offer a promising strategy for prevention and protection against HIV transmission." ScienceDaily. ScienceDaily, 6 December 2012. <www.sciencedaily.com/releases/2012/12/121206203242.htm>.
Public Library of Science. (2012, December 6). Vaginal microbicide gel may offer a promising strategy for prevention and protection against HIV transmission. ScienceDaily. Retrieved October 20, 2014 from www.sciencedaily.com/releases/2012/12/121206203242.htm
Public Library of Science. "Vaginal microbicide gel may offer a promising strategy for prevention and protection against HIV transmission." ScienceDaily. www.sciencedaily.com/releases/2012/12/121206203242.htm (accessed October 20, 2014).

Share This



More Health & Medicine News

Monday, October 20, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Microneedle Patch Promises Painless Pricks

Microneedle Patch Promises Painless Pricks

Reuters - Innovations Video Online (Oct. 18, 2014) — Researchers at The National University of Singapore have invented a new microneedle patch that could offer a faster and less painful delivery of drugs such as insulin and painkillers. Video provided by Reuters
Powered by NewsLook.com
Raw: Nurse Nina Pham Arrives in Maryland

Raw: Nurse Nina Pham Arrives in Maryland

AP (Oct. 17, 2014) — The first nurse to be diagnosed with Ebola at a Dallas hospital walked down the stairs of an executive jet into an ambulance at an airport in Frederick, Maryland, on Thursday. Pham will be treated at the National Institutes of Health. (Oct. 16) Video provided by AP
Powered by NewsLook.com
Raw: Cruise Ship Returns to US Over Ebola Fears

Raw: Cruise Ship Returns to US Over Ebola Fears

AP (Oct. 17, 2014) — A Caribbean cruise ship carrying a Dallas health care worker who is being monitored for signs of the Ebola virus is heading back to Texas, US, after being refused permission to dock in Cozumel, Mexico. (Oct. 17) Video provided by AP
Powered by NewsLook.com
Spanish Govt: Four Suspected Ebola Cases in Spain Test Negative

Spanish Govt: Four Suspected Ebola Cases in Spain Test Negative

AFP (Oct. 17, 2014) — All four suspected Ebola cases admitted to hospitals in Spain on Thursday have tested negative for the deadly virus in a first round of tests, the government said Friday. Duration: 00:55 Video provided by AFP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:

Strange & Offbeat Stories

 

Health & Medicine

Mind & Brain

Living & Well

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins