Research on HIV infection and how the virus behaves. Covers viral persistence, prevention policy, adolescent consent, and how HIV infects cells.
Dr. Fauci is scheduled to deliver a lecture on the pathogenic mechanisms of HIV disease, highlighting the paradoxical nature of immune cell activation and viral replication. He will present new data on how immune cells can inadvertently facilitate virus persistence.
Researchers found six HIV patients who started treatment early became test-negative for the virus. The study suggests that reducing HIV to low levels can help boost the immune system's response to the virus.
A randomized, controlled clinical trial found that a targeted HIV prevention intervention significantly reduced consistent condom use and risky sexual behaviors in high-risk African-American adolescent girls. The intervention emphasized ethnic and gender pride, HIV knowledge, communication, and healthy relationships.
A three-year clinical trial comparing tenofovir DF and stavudine found both treatments to be equally effective in treating HIV, but tenofovir DF had fewer toxic outcomes related to cholesterol levels, lipodystrophy, and peripheral neuropathy. The study involved over 600 patients across the US, South America, and Europe.
A study found that rapid HIV testing during labor can provide accurate results within 66 minutes, enabling women to receive antiretroviral prophylaxis. The study also showed higher test acceptance among younger women and those with limited prenatal care, highlighting the importance of early testing for pregnant women.
Researchers found that APOBEC3F protein can evade VIF's destruction of retroviral restrictors, potentially contributing to HIV resistance. The 'search and destroy' defense of APOBEC proteins may play a crucial role in resisting HIV infection.
A study of 374 people with HIV-1 infection found that CMV-positive status was significantly associated with accelerated progression to AIDS and death. Randomised clinical trials are needed to investigate the role of CMV in HIV disease progression.
Researchers found that GBV-C infection slows HIV growth and increases survival in HIV patients. The harmless virus boosts immune proteins, which prevent HIV from infecting cells.
A study published by Temple University researchers debunks the longstanding 'Trojan Horse' model of HIV-caused dementia. They found that a large, late invasion of HIV-infected macrophages into the brain is responsible for the disease, not early latent infection as previously thought.
A Temple virologist has received a grant to investigate the role of macrophages in HIV dementia complex. The researcher aims to understand how these cells contribute to the development of the condition, which affects 10% of AIDS patients, and explore potential therapies to target them.
Researchers identified six Lactobacillus strains capable of binding to the HIV envelope, inhibiting infection and potentially blocking transmission. The bacteria also bound to immune cells, causing them to clump and immobilize any infected cells.
Researchers discovered reduced lysozyme levels in HIV-demented patients' macrophages, suggesting impaired immune function and increased vulnerability to infections. The finding could lead to a marker for monitoring disease progression and potential new treatment targets.
Researchers at the Salk Institute have made a breakthrough in understanding how HIV replicates within host cells. The study revealed that molecules exist in cells that help convert HIV's RNA genome to DNA, allowing for the production of new virus particles.
A new study found that the diabetes drug rosiglitazone improved insulin sensitivity in HIV patients with lipodystrophy by 20%, reversing fat loss and increasing total body fat. However, larger trials are needed to determine safety and optimal therapeutic approaches.
A study found that urban American Indian women are at higher risk for contracting HIV due to elevated rates of trauma, including physical and sexual abuse. The research suggests that these women may be exposed to HIV infection despite reports of low risk, highlighting the need for assessments of trauma and prevention measures.
Researchers found that simple public health measures can contain highly transmissible diseases like SARS and smallpox. In contrast, moderately transmissible viruses like HIV and pandemic influenza require more complex control measures due to early symptom onset.
Between 1988 and 2000, New York State's HIV prevalence among childbearing women decreased steadily, with a 49% decrease in NYC and a 24% decline statewide. This decline was largely attributed to the widespread use of highly active antiretroviral therapy and targeted efforts aimed at minority populations.
A study found that HIV's gp120 protein can repel immune cells, dubbed fugetaxis, which could lead to a new therapeutic approach to block this activity. This mechanism may also apply to other viruses, such as pox and papilloma viruses.
Jay Levy's research has significantly impacted our understanding of HIV and the immune system, leading to major breakthroughs in antiviral responses. His work has also improved the safety of blood products for hemophiliacs and shed light on the role of plasmacytoid dendritic cells in HIV infection.
Research found a direct correlation between viral levels in blood and semen, with acutely infected individuals being hyper-infectious before symptoms occur. Transmission rates during heterosexual sex are likely to be much higher than previously thought during this period.
HIV-infected women are 3.9 times more likely to have HPV infection at the outset of the study, and smoking significantly increases this risk. Smoking and HIV infection may each alter the natural history of HPV infection to heighten tumor risk.
A South African study found that women experiencing gender-based violence are more likely to contract HIV due to abusive partners imposing risky sexual practices. The research highlights the need for effective interventions to address social constructions of masculinity and intimate partner violence in relation to HIV risk.
A recent study found that HIV infection progresses to AIDS at a rate of 7.4 years in developing countries, compared to 11 years in Western developed nations. The study also revealed a higher mortality rate among men living in developing countries.
Researchers found that RSV can remain dormant in lung tissue for over 100 days after initial symptoms disappear, suggesting a possible link to recurring wheezing and childhood asthma in infected children.
Researchers are investigating the safety of heart and lung transplants for HIV-positive patients when viral infections are well-controlled. Transplant teams must balance anti-rejection drugs with anti-retroviral therapies to avoid complications.
Researchers at Jefferson Medical College have found that the HIV virus produces proteins that trigger biochemical pathways in the brain, resulting in brain cell death and dementia. The study suggests that removing the virus or its associated proteins may be an effective way to prevent or treat HIV-related dementia.
Mortality rates among homeless women aged 18-44 are significantly higher than the general population, with a 10-fold increased risk of death. The authors suggest addressing addictions, HIV infection, and mental health issues through targeted programs to save lives.
A study by Dr. Terri H. Finkel and colleagues identifies a gene called HALP that plays a crucial role in protecting HIV-infected cells from apoptosis. The discovery may provide clues for new treatments, including ways to prevent latent infection.
Researchers discover HIV mutations that prevent immune system from recognizing protein fragments, allowing virus to replicate and increase in number. This finding highlights the importance of considering nearby regions not recognized by the immune system when designing vaccines.
A specific mutation in the KCNMB1 gene is associated with lower blood pressure, according to a study published in JCI. Researchers found that individuals with this mutation had lower diastolic blood pressure compared to those without it. The study suggests that targeting the beta1 subunit may have therapeutic potential for treating hyp...
A new study suggests that male circumcision may protect against HIV-1 infection by removing the foreskin's high density of specific cellular targets. The study found a highly significant and specific protective effect of male circumcision on HIV-1 acquisition rates, but no protective effect against other STIs.
Researchers found simian foamy virus (SFV) in 1% of Cameroonian villagers, linked to hunting and butchering primates. The study suggests retroviral zoonosis is widespread, highlighting the need for economic alternatives to reduce human-primate contact.
Studies of rural communities in Cameroon found that people exposed to blood or body fluids from primates during hunting have a higher risk of simian retrovirus infection. Genetic analysis revealed three geographically independent human infections, acquired from different primates.
Researchers identified a mechanism preventing immune system destruction of chronic viral infections like herpes and HIV. Regulatory CD4+ T cells suppress normal function of CD8+ T cells in persistently infected mice, allowing virus to evade the immune system.
A recent study by Mark Feinberg and colleagues reveals that the level of immune activation directly affects the initial peak of virus in the blood stream. The researchers also found that steady-state viral levels in chronic infection are related to the generation of a primary immune response, which may be both helpful and harmful.
Researchers found HIV patients had significantly larger carotid IMT and higher rates of plaque build-up compared to uninfected controls. The study suggests HIV infection may be an independent risk factor for atherosclerosis, with lowest CD4 counts associated with thickest artery walls.
Research finds HIV-positive men who have persistent GBV-C infection survive longer, but the exact reason is unknown. The study of 271 participants found that those with long-term GBV-C infection lived up to 11 years after contracting HIV.
Researchers found that dual-infection with HIV and GBV-C leads to better outcomes, including slower progression to AIDS and lower mortality rates. Understanding the mechanism behind this phenomenon could lead to the development of improved therapies.
The study highlights the dangers of crystal methamphetamine use on HIV risk, particularly among young men who have sex with men. Methamphetamine can suppress a part of the immune system important in fighting off HIV, increasing the risk of infection and contracting the disease.
Researchers have identified TRIM5-alpha as a natural blocker of the HIV-1 virus, which could lead to new strategies for preventing infection that causes AIDS. The protein is found in human cells but is less effective than the monkey version, and its potency may vary among individuals.
Researchers at Dana-Farber Cancer Institute have identified a protein, TRIM5-alpha, that blocks HIV replication in monkey cells. This discovery opens new avenues for intervening in early HIV infection and provides critical insights into viral uncoating, a little understood step in the viral lifecycle.
Chronic HIV infection causes non-specific premature maturation of T-cells, resulting in replicative senescence and exhaustion of the immune system. This leads to an increased likelihood of opportunistic infections, making HIV so deadly.
Researchers at UW-Madison find that mutations allowing AIDS viruses to escape immune detection also hinder their ability to grow after transmission. The discovery may help design vaccines targeting the virus's most vulnerable spots.
A genetic mutation in the CCR5 gene does not offer protection against HIV infection, according to new research by Scripps scientist Donald Mosier. The study tested the hypothesis that the mutation, which appeared in Europe during the Middle Ages, protected against both HIV and plague.
A multinational trial found that the combination of Pegasys and Copegus significantly increased sustained virological response rates in patients co-infected with HIV and Hepatitis C. The study reported 40% overall efficacy, including 62% efficacy for genotype 2 and 3 patients.
Researchers found that HIV-positive patients with a history of alcohol abuse showed statistically significant impairments in verbal IQ, verbal reasoning, and reaction time compared to those without a history of alcohol dependence. Even after stopping alcohol use, these patients remained at risk for cognitive impairment.
Researchers conclude that sexual transmission remains the primary mode of HIV-1 spread in Africa. The authors also acknowledge the need for improved data to identify risks associated with unsafe injections in healthcare settings.
A study found that cities with predominantly black tar heroin use had lower HIV infection rates among injection drug users compared to those using powder heroin. This is due to the properties of black tar heroin, which makes it difficult to transmit HIV through needle sharing.
Leading medical schools and research institutions criticize a US-sponsored HIV vaccine trial in Thailand due to the absence of independent expert input. The trial's high cost of $119 million has also raised concerns about its scientific merit.
The University of California - San Diego Medical Center has been awarded a contract by the NIH to create a national tuberculosis educational curriculum. The goal is to raise awareness and improve education on TB, which can be controlled with effective medications. The consortium includes faculty members from 12 medical schools, six nur...
A study of nearly 1,500 couples found that valacyclovir reduced HSV-2 transmission by half, with couples using condoms and valacyclovir having the lowest transmission rate. This finding adds an important option in managing genital herpes, particularly for those who are sexually active.
A study found that antiretroviral treatment significantly reduced the risk of HIV transmission from HIV-infected individuals to their partners. However, an increase in unprotected anal intercourse offset this benefit, highlighting the need for prevention interventions alongside treatment.
A study found that HIV-positive women are more likely to engage in unprotected sex due to a lack of empowerment or low self-esteem. Ongoing risk-reduction counseling and substance abuse treatment are crucial to curb high-risk behavior, experts say.
A new global study on HIV/AIDS indicates the effectiveness of needle and syringe exchange programmes for preventing HIV transmission among people who inject drugs. Distribution of sterile needles and syringes helps reduce HIV infection rates, with cities introducing exchanges seeing a 19% decrease in prevalence.
Researchers identified several factors that may enable or prevent HIV transmission through breastfeeding, including the hostile environment of saliva and immune activation in the gastrointestinal tract. Protective factors include natural killer cells, natural antibodies, and specific antibody responses.
A study of HIV-infected patients undergoing liver transplantation found improved survival rates compared to HIV-negative patients. Poorer survival was associated with postoperative intolerance, low CD4 counts, and hepatitis C coinfection.
Researchers found that green tea catechin EGCG effectively prevents HIV from binding to human T cells, a breakthrough in the fight against HIV. Further research is needed to explore the potential clinical application of EGCG as an anti-HIV drug.
Researchers at Thomas Jefferson University have identified a new cell type, the dermal dendrocyte, that increases in number in tumors of early human Kaposi's sarcoma. The discovery offers a potential tool for studying the disease and its connection to abnormal wound healing and other conditions.
A new TB vaccine, using a killed Mycobacterium vaccae vaccine, has shown to enhance immunity against TB in both HIV-positive and negative patients. The study, conducted in Finland and Tanzania, suggests the vaccine may be an effective tool in preventing TB among high-risk populations.
The new program combines counseling and education efforts with medical therapy to reduce HIV levels in patients. The initiative aims to assess the impact of integrating prevention services into primary care on HIV risk behaviors and outcomes.