July 25, 2007
Children living with HIV/AIDS in developing countries need access to specialized antiretroviral drugs and other treatments, Annette Sohn, an assistant professor at the University of California-San Francisco's pediatric infectious disease division, said on Wednesday at the 4th IAS Conference on HIV Pathogenesis, Treatment and Prevention in Sydney, Australia, AFP/iafrica.com reports (Sands, AFP/iafrica.com, 7/25).
Delegates attending the conference, which ends on Wednesday, presented studies and discussed advances in HIV/AIDS prevention and treatment. The conference aims to improve understanding of HIV/AIDS, treatments for the disease and methods to prevent it from spreading worldwide (Kaiser Daily HIV/AIDS Report, 7/24).
According to Sohn, about 780,000 HIV-positive children worldwide need antiretroviral drugs but only 15% have access to them. Sohn urged pharmaceutical companies to focus on designing specialized antiretrovirals for children after a study -- which was conducted by NIH's National Institute of Allergy and Infectious Diseases and found that HIV-positive infants have a greater chance of survival if they are given immediate treatment -- was presented at the conference on Wednesday (AFP/iafrica.com, 7/25).
"Children with HIV infection frequently show rapid disease progression within the first year of life due to their developing immune system and susceptibility to other serious infections," NIH Director Elias Zerhouni said Wednesday when releasing the study at the conference. He added, "This is the first randomized clinical trial that shows that infants treated before three months of age will do better than infants who have their treatment delayed."
Anthony Fauci, director of NIAID, said, "The results of this trial could have significant public health implications worldwide because these findings will cause experts to consider changes in standards of care in many parts of the world" (Reuters, 7/24).
Sohn on Wednesday said, "These findings have implications for guidelines on timing of antiretroviral therapy in early infancy and support the need for enhanced early diagnosis of infants and early effective transition into care." She added, "Research presented at this and other conferences have increasingly proven that we are waiting too long to treat HIV-positive children" in developing countries. According to Sohn, "Better generic pediatric antiretrovirals that are both potent enough to achieve sustained clinical and virological improvement and have limited long-term metabolic side effects are urgently needed."
Better diagnostic tools for health care workers working on pediatric HIV also are needed, Sohn added. "We are not identifying more HIV-positive women during pregnancy, and we lack the ability to diagnose their infants, so we don't know they're infected until they're already very sick," she said, adding, "By that time, it's often too late to prevent opportunistic infections and maximize the treatment benefits of antiretroviral therapy" (AFP/iafrica.com, 7/25).
Citric Juice, Microbicide Studies
Roger Short, a reproductive biologist at the University of Melbourne, at the conference Tuesday presented a study that found vaginal douching with citrus juice has no effect on the spread of sexually transmitted infections, including HIV, Australia's The Age reports (Leung, The Age, 7/24).
Short in 2002 told the Australian Broadcasting Corporation that a "few drops" of lemon or lime juice could protect women from HIV infection and unplanned pregnancies. He said he thought HIV, in addition to sperm, also might be affected by lemon juice because the virus is "extremely susceptible" to acidity. According to Short, laboratory tests, which did not include tests on humans or animals, indicated that the citrus juice killed HIV and sperm (Kaiser Daily HIV/AIDS Report, 10/11/02).
The recent study, conducted in collaboration with clinicians in the U.S. and Nigeria, examined the sexual health of almost 400 commercial sex workers in Jos, Nigeria. About one-fifth used lemon or lime juice to prevent STIs while the others did not. Tests for STIs -- including HIV, syphilis and hepatitis B and C -- found that there were no statistically significant differences in incidence between the groups, The Age reports. "Unfortunately, [lemon and lime juice] doesn't appear to have worked" in preventing STIs, Short said (The Age, 7/24).
Also at the conference, Jeremy Paull, a researcher at the Australian pharmaceutical company Starpharma, presented data from recent trials of an experimental microbicide, called VivaGel, that has been found to prevent the sexual transmission of HIV and genital herpes, the AAP/Sydney Morning Herald reports.
According to Paull, recent trials on animals have shown the gel to be between 85% and 100% effective at preventing the transmission of HIV and genital herpes. He added that the active ingredient in the gel is dendrimer, which is a molecule that binds to both viruses and prevents them from infecting healthy cells. Safety trials of the gel are under way among humans, the AAP/Morning Herald reports. According to Paull, the gel will be used by men who apply it before sex with women. Initial data presented at the conference indicate that the gel is safe and well-tolerated by healthy men whether or not they are circumcised (AAP/Sydney Morning Herald, 7/25).
In related news, conference delegates also discussed the risks people living with HIV/AIDS face as their lives are extended by the use of antiretrovirals, Business Day/AllAfrica.com reports. Physicians speaking at the conference warned that while HIV-positive people are living longer, they face a higher risk of age-related illnesses, including cardiovascular disease, osteoporosis and dementia (Kahn, Business Day/AllAfrica.com, 7/24).
Kaisernetwork.org serves as the official webcaster of the IAS conference. Individuals can sign up for a free daily update e-mail and find more information about conference webcasts online.
Video of the session that examines pediatric HIV/AIDS treatment is available online.
PBS' "The Charlie Rose Show" on Tuesday included a discussion about developments in HIV/AIDS research. Guests on the program included biochemist and Nobel Prize winner Paul Nurse; Seth Berkley, president and founder of the International AIDS Vaccine Initiative; Scott Hammer, a professor of medicine at Columbia University; Peter Kwong of the Vaccine Research Center at NIAID; and Judy Lieberman, director of the Division of AIDS at Harvard Medical School and senior investigator at the CBR Institute for Biomedical Research (Rose, "The Charlie Rose Show," PBS, 7/24) Video of the segment will be available online later this week.
BMS Launches New Approach to Expanding HIV Treatment Model
Bristol-Myers Squibb at the conference on Monday announced a new approach to expanding its Secure the Future initiative in developing countries. The new approach will replicate the initiative's HIV/AIDS treatment support programs in conjunction with governments, community groups and other funders. Secure the Future at the conference released a manual on establishing antiretroviral treatment programs that include community support to ensure that HIV-positive people receive assistance at home and in the community, as well as in clinics. The manual includes experiences from Botswana, Lesotho, Namibia, Swaziland and South Africa (BMS release, 7/23).
Reprinted with permission from kaisernetwork.org. You can view the entire Kaiser Daily HIV/AIDS Report, search the archives, or sign up for email delivery at www.kaisernetwork.org/dailyreports/hiv. The Kaiser Daily HIV/AIDS Report is published for kaisernetwork.org, a free service of the Kaiser Family Foundation, by The Advisory Board Company. © 2007 by The Advisory Board Company and Kaiser Family Foundation. All rights reserved.
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