Tenofovir News and Research

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iPrEx study: PrEP reduces HIV infection risk among gay, bisexual men

A daily dose of an oral antiretroviral drug, currently approved to treat HIV infection, reduced the risk of acquiring HIV infection by 43.8 percent among men who have sex with men.

24 Nov 2010

iPrEx trial shows reduction in new HIV infections

Results of the world's first efficacy trial of an HIV-prevention approach called oral pre-exposure prophylaxis, or PrEP, were released online in the New England Journal of Medicine today.

24 Nov 2010

iPrEx oral PrEP study achieves major milestone in HIV prevention research

This is a great day in the fight against AIDS. The positive results of the iPrEx oral PrEP study are a major milestone in HIV prevention research and provide important information about how antiretroviral drugs might be used for prevention by HIV-negative people at high risk for HIV infection, said AVAC Executive Director Mitchell Warren.

24 Nov 2010

Daily oral antiretroviral reduces HIV infection risk in MSM by 44%, study finds

A study that included nearly 2,500 HIV-negative men and transgender women who have sex with men has shown that a daily dose of Truvada, a pill containing the AIDS drugs emtricitabine and tenofovir, "can reduce risk of contracting [HIV] by an average of 44% - and by more than 70% if the subjects" follow the regimen closely, Los Angeles Times reports (Maugh, 11/23).

24 Nov 2010

CONRAD congratulates Global iPrEx study team for HIV prevention trial

CONRAD is pleased to join in congratulating the Global iPrEx study team for their successful trial of oral tenofovir (TDF) with emtricitabine (FTC) for HIV prevention.

24 Nov 2010

Gilead submits Truvada/TMC278 single-tablet regimen NDA to FDA

Gilead Sciences, Inc. today announced that it has submitted a New Drug Application (NDA) to the U.S. Food and Drug Administration (FDA) for marketing approval of the single-tablet regimen of Truvada® (emtricitabine and tenofovir disoproxil fumarate) and Tibotec Pharmaceuticals' investigational non-nucleoside reverse transcriptase inhibitor TMC278 (rilpivirine hydrochloride) for HIV-1 infection in adults. If approved, this would be the second product that contains a complete HIV treatment regimen in a single once-daily tablet.

23 Nov 2010

Chimerix’s lipid-conjugated drugs reduces nephrotoxicity: Study

Scientists from Chimerix, Inc. today presented in vitro data demonstrating that the company's lipid-conjugated drugs, CMX001 and CMX157, are not substrates for the human Organic Anion Transporters (hOATs) and thus have significantly reduced potential to cause nephrotoxicity via this mechanism.

17 Nov 2010

New York Times examines HIV prevention products undergoing clinical trials

The New York Times examines several products being studied in clinical trials that researchers hope will one day prevent sexual transmission of HIV. The newspaper describes the ongoing trials of a vaginal microbicide gel containing the antiretroviral tenofovir which was found to reduce the risk of HIV infection in women by 39 percent, writing, "[o]ther clinical trials will report their results in 2011 and 2012 and, if all goes well, researchers hope to have a product or two ready to enter the market by 2013."

10 Nov 2010

CONRAD receives $5 million award from USAID

CONRAD, leaders in reproductive health and HIV prevention research, today announced a $5 million award from the US Agency for International Development (USAID). The grant will fund research and development of vaginal rings that are contraceptive and also prevent HIV and STI infections.

3 Nov 2010

Gilead to present data of two Phase III trials evaluating Viread efficacy for HBV infection at The Liver Meeting 2010

Gilead Sciences, Inc. today announced new data from the open-label phase of two pivotal Phase III clinical trials (Studies 102 and 103) evaluating the four-year efficacy of Viread (tenofovir disoproxil fumarate) for the treatment of chronic hepatitis B virus (HBV) infection.

1 Nov 2010

Tenofovir gel to prevent HIV transmission nearing approval

Anti HIV drug Tenofovir in its gel form is to be fast-tracked for approval by the US FDA. The announcement was made by Conrad, a nonprofit scientific organization based in Arlington, Virginia that works with reproductive health.

28 Oct 2010

Reuters examines development progress of microbicide gel to prevent HIV

Reuters reports that the developers of a vaginal microbicide gel containing the antiretroviral tenofovir, which has been found to reduce "HIV infections in women by 39 percent," said the FDA last week granted fast-track approval designation to the gel.

28 Oct 2010

Gilead Sciences third quarter total revenues increase 8% to $1.94 billion

Gilead Sciences, Inc. announced today its results of operations for the quarter ended September 30, 2010. Total revenues for the third quarter of 2010 were $1.94 billion, up 8 percent compared to total revenues of $1.80 billion for the third quarter of 2009. Net income for the third quarter of 2010 was $704.9 million, or $0.83 per diluted share, compared to net income for the third quarter of 2009 of $673.0 million, or $0.72 per diluted share.

20 Oct 2010

World's third rectal microbicide trial launched in Pittsburgh

The world's third rectal microbicide trial launched in Pittsburgh, Pennsylvania today, with sites preparing to open in Boston, Massachusetts, and Birmingham, Alabama soon. Scientists will test the rectal safety and acceptability of tenofovir gel, a microbicide developed for vaginal use that has shown promise for preventing HIV through vaginal intercourse. Depending on the outcome of this new study, tenofovir gel could be further evaluated to determine if it can reduce the risk of HIV among both men and women who engage in receptive anal intercourse.

14 Oct 2010

MTN-007 phase trial evaluates vaginal microbicide to prevent rectal transmission of HIV

Tenofovir gel, a vaginal microbicide that has shown promise for preventing HIV through vaginal sex, is being tested in a new trial looking at its safety and acceptability when used rectally. The results of the study, being led by the U.S. National Institutes of Health (NIH)-funded Microbicide Trials Network (MTN), will help determine if the gel should be evaluated further for its potential to prevent HIV among both men and women who engage in receptive anal intercourse.

13 Oct 2010

New topical microbicide gel can prevent HIV transmission

Amyloid protein structures are best known for the troubles they pose in the brains of Alzheimer's patients. Now researchers are trying to exploit their presence in a very different place in semen to find a new way to stop HIV.

29 Sep 2010

Researchers to develop vaginal microbicide gels to reduce HIV risk

With the support of an $11.8 million, five-year federal grant, researchers at the University of Pittsburgh and their collaborators are developing a quick-dissolving vaginal film containing a powerful drug that reduces the risk of HIV infection, and they plan to begin testing it locally within a year.

17 Sep 2010

Gilead Sciences announces Quad regimen Phase II clinical trial results for HIV infection treatment

Gilead Sciences, Inc. today announced Phase II clinical trial results showing that its investigational fixed-dose, single-tablet "Quad" regimen of elvitegravir, cobicistat and Truvada (emtricitabine and tenofovir disoproxil fumarate) for the treatment of HIV infection maintained a high rate of virologic suppression through 48 weeks, exhibiting antiretroviral activity comparable to that of Atripla(efavirenz 600 mg/emtricitabine 200 mg/ tenofovir disoproxil fumarate 300 mg).

14 Sep 2010

Experts gathered for UNAIDS, WHO meeting recommend follow-up studies of ARV-containing microbicide gel start soon

Experts gathered at a joint meeting of UNAIDS and the WHO last week called for two additional clinical trials to test the effectiveness and safety of a microbicide vaginal gel containing the antiretroviral tenofovir, which previous studies have shown reduces the risk of HIV transmission in women who used it before and after sex by 39 percent, PANA/Afrique en ligne reports (9/5).

8 Sep 2010

AVAC calls for economic and political support for CAPRISA 004 microbicide trial's critical follow-up studies

AVAC today issues a call to action to donors, policy-makers, researchers and advocates to ensure that critical follow-up studies to the landmark CAPRISA 004 microbicide trial receive the economic and political support needed to move forward as quickly as possible. The call comes as a group of microbicide and public health experts have agreed upon a plan for further studies, which are expected to cost $100 million over three years, of which only $58 million has been committed.

4 Sep 2010