Navigation Links
Vaginal Microbicides Might Help More Men Than Women
Date:7/10/2008

Researchers say clinical trials' design may also mask risk of HIV drug resistance

THURSDAY, July 10 ( HealthDay News) -- A new study questions whether vaginal microbicides being developed to help protect women against HIV infection could lead to new drug resistance from the virus that causes AIDS.

The study, published July 7 in the online issue of Proceedings of the National Academy of Sciences, also shows that, under certain circumstances, men may actually benefit a bit more than women from the microbicides, which are compounds that can be applied inside the vagina.

Drug companies are running clinical trials on some second-generation microbicides based on antiretroviral, or ARV, medicines.

The study by the UCLA AIDS Institute also questions the designs of these trials. The researchers made the conclusions by using mathematical models that simulate clinical trials and population-level transmission of HIV.

Under the scenarios the researchers developed, men were slightly more protected than woman in certain situations. This occurred when the in-trial microbicide, an ARV drug called dapivirine, was only effective about half the time in women -- a situation that could occur if HIV-positive women on microbicides developed drug-resistant strains of HIV that were then less likely to be transmitted to men.

"The antiretroviral drugs within these microbicides are the same as those used to treat people who are infected with HIV, so there is great expectation that these microbicides will be very effective," said first author Dr. David Wilson, of the National Centre in HIV Epidemiology and Clinical Research at Australia's University of New South Wales, in a prepared statement.

"But the concern is that these microbicides are going to lead to drug resistance," he said.

Concerns about drug resistance come from the fact that the current clinical trial drops women from the study if they turn up HIV-positive during monthly screening, the researchers said.

"Since monthly testing will take place in the dapivirine trial, we predict that few, if any, cases of acquired resistance will arise during the trial, even if the drug is readily absorbed (i.e., the microbicide is high risk)," the researchers wrote. "Therefore, our analyses have shown that high-risk microbicides could pass Phase III trials, as their potential to cause resistance will be masked by frequent testing."

More information

The U.S. Department of Health & Human Services has more about HIV prevention drugs.



-- Kevin McKeever



SOURCE: University of California, Los Angeles, news release, July 7, 2008


'/>"/>
Copyright©2008 ScoutNews,LLC.
All rights reserved  

Related medicine news :

1. HIV prevention researchers to compare common ARV as a pill and vaginal gel in unique study
2. Study Finds More Than One in Two Women are Too Embarrassed to Discuss Vaginal Discomfort With Their Doctors
3. IPM Reaches Landmark Agreement with Pfizer to Develop FDA-Approved Antiretroviral Drug as Vaginal Microbicide
4. Antiretroviral Drugs May Prevent Vaginal Transmission of HIV
5. Vaginal progesterone gel may improve infant outcomes and...
6. Researchers develop new tool to predict who will use microbicides
7. ADHD Might Raise Kids Obesity Risk
8. Meditation, Yoga Might Switch Off Stress Genes
9. Could new discovery about a shape-shifting protein lead to a mighty morpheein bacteria fighter?
10. Stem Cells Might Treat Tough Fractures
11. Diabetes Might Help Spur Hearing Loss
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Vaginal Microbicides Might Help More Men Than Women
(Date:6/25/2016)... , ... June 25, 2016 , ... ... policy issues and applications at AcademyHealth’s Annual Research Meeting June 26-28, 2016, at ... on several important health care topics including advance care planning, healthcare costs and ...
(Date:6/25/2016)... ... June 25, 2016 , ... First Choice Emergency Room ... Dr. Sesan Ogunleye, as the Medical Director of its new Mesquite-Samuell Farm facility. ... of our new Mesquite location,” said Dr. James M. Muzzarelli, Executive Medical Director of ...
(Date:6/25/2016)... ... 2016 , ... Conventional wisdom preaches the benefits of moderation, whether it’s a ... the bar too high can result in disappointment, perhaps even self-loathing. However, those who ... , Research from PsychTests.com reveals that behind the tendency to set ...
(Date:6/24/2016)... ... June 24, 2016 , ... Marcy was in a crisis. Her son James, eight, was out ... family verbally and physically. , “When something upset him, he couldn’t control his emotions,” remembers ... would throw rocks at my other children and say he was going to kill them. ...
(Date:6/24/2016)... ... June 24, 2016 , ... Comfort Keepers® of San Diego, CA ... the Road To Recovery® program to drive cancer patients to and from their cancer ... ensure the highest quality of life and ongoing independence. Getting to and from ...
Breaking Medicine News(10 mins):
(Date:6/24/2016)... 2016   Pulmatrix, Inc ., (NASDAQ: ... drugs, announced today that it was added to the ... its comprehensive set of U.S. and global equity indexes ... important milestone for Pulmatrix," said Chief Executive Officer ... our progress in developing drugs for crucial unmet medical ...
(Date:6/24/2016)... Tenn. , June 24, 2016  Arkis ... providing less invasive and more durable cerebrospinal fluid ... in funding.  The Series-A funding is led by ... Lighthouse Fund, and other private investors.  Arkis, new ... neurosurgical instrumentation and the market release of its ...
(Date:6/23/2016)... June 23, 2016 Research and Markets ... Market - Forecast to 2022" report to their offering. ... method for the patients with kidney failure, it replaces the ... from the patient,s blood and thus the treatment helps to ... chloride in balance. Increasing number of ESRD ...
Breaking Medicine Technology: