Articles tagged with Human Immunodeficiency Virus
The introduction of generic ART led to a significant decline in HIV-related deaths in India between 1997 and 2003. Accessible drugs have also reduced the incidence of opportunistic infections such as tuberculosis among immunocompromised patients.
Researchers identify a key pathway for targeting pDC function in HIV vaccine development. A decrease in blood pDC frequency is observed in chronic HIV infections, correlating with high viral load and reduced CD4 counts.
A multi-center study of 425 HIV-positive men found that central fat loss was statistically associated with peripheral fat loss in HIV-positive men on retroviral therapy. Central fat gain was also less among HIV-positive men, with age being the strongest factor associated with increased visceral fat.
An international team of researchers suggests that people at high risk of contracting HIV should take daily antiretroviral medication as a preventative measure. This approach, known as PrEP, has been shown promise in clinical trials and is seen as a crucial strategy to combat the ongoing pandemic.
Scientists at Vanderbilt University Medical Center discovered compounds secreted by frog skin can selectively kill HIV without harming T cells. The findings hold promise for developing new treatments and vaccines against the virus.
A study in Rakai, Uganda found that women are at a higher risk of HIV infection during pregnancy compared to other times. The risk remains significant even after adjusting for sociodemographic or behavioral factors.
A new study from Uganda found that pregnant women are at a higher risk of acquiring HIV, with rates of 2.3% per year during pregnancy compared to 1.3% during breastfeeding and 1.1% for non-pregnant women. The research suggests hormonal changes may contribute to this increased risk.
Robert Gallo emphasizes the need for a rational approach to HIV vaccine development, ignoring empirically driven methods and focusing on solid knowledge of HIV biology. He suggests leveraging the Gates's Foundation's Grand Challenge for Global Health to find practical solutions to scientific roadblocks.
Research suggests that performing genotype resistance testing at the time of HIV diagnosis can guide treatment choices, increasing patient survival by over 14 months. The cost-effectiveness analysis indicates a cost of $23,900 per quality-adjusted life year gained, comparable to other HIV interventions.
A study found that HIV-infected patients with mild memory loss who used the Disease Management Assistance System (DMAS) Jerry took their medication 80% of the time, compared to 65% without it. This improvement was seen in both normal and memory-impaired patients.
A new study confirms that APOBEC-3G edits the HIV genetic code, preventing viral reproduction. Higher levels of A3G are associated with lower HIV viral levels and higher CD4 T cell counts in patients. This discovery holds promise for a novel approach to fight HIV.
The article highlights the need for further research on HIV and aging, citing concerns over delayed diagnoses and inadequate treatment. Older patients with HIV may experience increased mortality rates and unique side effects from HAART treatment due to age-related factors.
Researchers employed a bacteriophage to learn how an HIV protein responds to new anti-viral molecules, identifying compounds with potential to overcome drug resistance. This approach enables faster and more effective drug discovery for other anti-viral therapies.
A Penn physician argues that explicit consent is not necessary for HIV testing in critically ill patients, as it can lead to earlier application of life-saving therapies and reduce costs. Alternative methods, such as surrogate consent or court-ordered testing, may be more effective but also pose challenges.
A recent study found that HIV therapy success rates are similar between developed and non-developed countries, with a general success rate of 60% after 12-18 months on treatment. People in developing countries who received free ART drugs showed a 30% higher rate of success than those who had to pay for their medication.
Random fluctuations in gene expression can influence HIV latency, suggesting that a cell's fate is determined by chance rather than predetermined mechanisms. The researchers' model suggests that targeting chemical modifications required for Tat's function could lead to new treatments.
A study of over 3,200 HIV patients found that HAART substantially reduces the rate of AIDS progression by 86% compared to no treatment. The effectiveness of HAART increases with time since initiation, but its benefits are reduced for patients who contracted HIV through intravenous drug use.
A study found that antiretroviral therapy can suppress HIV RNA in breast milk, reducing mother-to-child transmission. However, the impact of therapy on HIV DNA levels is unclear, with some studies suggesting a possible delay in treatment's effectiveness.
Studies show that FUZEON combined with tipranavir achieves a ten-fold reduction in viral load and double the increase in immune cell count. The 'FUZEON effect' has been seen across multiple studies, nearly doubling patients reaching undetectable viral loads.
A new study in PLoS Pathogens found that HIV's Vif protein exhibits natural variation, which can impact its ability to replicate. This variability may accelerate the evolution of the virus by partially or fully inactivating host defensive proteins.
A new, low-cost device can accurately count CD4 cells in HIV-infected individuals, enabling early treatment decisions and improving patient outcomes. The portable handheld model is designed for healthcare workers in remote areas, addressing a critical need in low-income countries.
Researchers find HIV domains mediate cell membrane fusion and downregulate T-cell responses. The study also suggests a novel way to decrease undesirable immune responses, independent of HIV infection.
The USPSTF has issued new recommendations for HIV screening, which will be posted on the journal's website and the Agency for Health Care Research and Quality's website. The Task Force recommends testing for all individuals at risk of HIV infection, as well as pregnant women to prevent mother-to-child transmission of AIDS.
A new review of 10 studies on HIV treatment programs in developing countries found that nearly 57% of patients had undetectable HIV levels one year after starting ART. Free or low-cost ART programs have been shown to improve adherence and treatment outcomes, suggesting a significant link between access and success.
A team of researchers has identified an intermediate stage in virus-cell fusion that lasts several minutes, providing a potential window of opportunity for drug development. This discovery may allow existing drugs to be re-evaluated and fine-tuned to target this critical point in the viral entry process.
A study in South Africa found that a new treatment approach, including isoniazid and cotrimoxazole, reduced tuberculosis incidence among HIV-infected employees by 32%. The intervention was part of a clinic established in 1999 to provide specialist care for HIV-infected employees.
Researchers found that HIV protease inhibitors (PIs) can inhibit programmed cell death in mouse models with hepatitis, shock, and stroke. PIs maintain mitochondrial integrity to prevent apoptosis, suggesting potential uses for related compounds in non-HIV disorders.
ID physicians and expert general medicine physicians outperform non-expert generalists in treating patients with HIV. Key findings include improved viral load control and increased flu vaccination rates among expert groups.
Scientists have discovered that human cells use RNA silencing to defend against HIV, a phenomenon previously unknown in mammals. The discovery of a novel siRNA sequence that targets the HIV protein Tat may lead to the development of new RNAi-based drugs to combat the virus.
A new surgical technique called 'sharpless' surgery uses laparoscopy, electrocautery, and skin clips to reduce the risk of infection. The study found that blood-borne pathogens are associated with certain operations and that inexperienced surgeons-in-training are at greatest risk.
Researchers at Duke University Medical Center discovered that HIV vaccines may have failed due to the induction of self-reactive antibodies, which can destroy the body's own tissues. The team proposes a new approach to develop HIV vaccines by redirecting the immune response from innate B cells to adaptive B cells.
The study found that mixed breast feeding quadrupled HIV transmission, while predominant breastfeeding increased it by 2.6 times compared to exclusive breastfeeding. Early introduction of non-human milks and solid foods increases the risk of HIV infection for babies of HIV-positive women.
Researchers at UCLA have discovered a molecule on immune cells that plays a critical role in the sexual transmission of HIV. Blocking this molecule could prevent HIV from spreading infection, potentially reducing its ability to infect new individuals.
Researchers identified two strains of lactobacillus that can trap and block HIV, potentially providing a safe and cost-efficient method for preventing its spread. The technology could be used to protect infants and women in poor countries via fermented foods or feminine products.
Scientists at Cold Spring Harbor Laboratory identified 130 genes that affect the replication of retrovirus-like elements in yeast. These genes have clear relatives or homologs in the human genome, providing a rich source for candidate host genes to develop new anti-retroviral therapeutics.
Scientists found that a small form of APOBEC3G repels HIV, while a large form is ineffective; blocking the small form makes resting cells susceptible to infection. The discovery shifts the paradigm on how HIV infects T cells.
Research found that moderate aerobic exercise significantly improves cardiovascular and autonomic profiles in HIV+ subjects, compared to those without HIV. The study suggests that exercise may be a cost-effective supplemental therapy for HIV patients.
A recent study by Emory University Health Sciences Center found that patients newly diagnosed with HIV are more likely to enter outpatient care with case management. The study showed that 78% of patients with case management visited an HIV clinician at least once within 6 months, compared to 60% in the standard-of-care group.
The study recommends routine voluntary testing to diagnose undiagnosed HIV cases, especially among high-risk groups. This approach aims to provide counseling on prevention and treatment options.
A recent review found a strong relationship between psychological problems, particularly depression, and insomnia in HIV patients. Healthcare workers should prioritize diagnosing and treating anxiety and depression to prevent insomnia and its disabling effects on patients with HIV.
A study found that HIV-positive women with normal cervical cytology and negative HPV test results had a similar low cumulative incidence of abnormal lesions compared to HIV-negative women. The authors suggest considering psychosocial costs of positive HPV tests in these women before adjusting screening intervals
A patient with a drug-resistant form of HIV was identified, exhibiting rapid progression to AIDS. The case highlights the need for intensified prevention efforts, particularly among high-risk groups such as men who have sex with men and intravenous drug users.
A collaborative study by UCL scientists found that HIV-1 subtype B spread through at least six separate transmission chains in the UK, contradicting the prevailing belief of a single initial entry. The study suggests changes in sexual behavior and lack of impact from antiretroviral therapy may have slowed the epidemic growth.
The study examines lessons learned from Africa's first public ARV treatment clinic in Botswana, highlighting the need for consistent care and ongoing training for staff. The clinic has successfully treated thousands of patients, but challenges persist in staffing and infrastructure.
A Vanderbilt University Medical Center study has identified a crucial early step in the HIV assembly process, revealing how the Gag protein is directed to the multivesicular body. The discovery could lead to the development of new drugs targeting this step, potentially blocking viral replication.
Scientists attribute high frequency of CCR5-Ä32 mutation in Scandinavia and Russia to protection from lethal, viral haemorrhagic fevers that occurred during the Middle Ages. The disease provided selection pressure for the mutation, which explains its highest frequency in these regions today.
A recent Emory University study found that HIV infection is not an independent risk factor for severe heart disease in patients who undergo cardiac catheterization. Lifestyle and traditional cardiac risk factors, such as hypertension and high cholesterol levels, play a larger role in the development of CAD.
Researchers at Mount Sinai School of Medicine discovered that alpha-defensin-1, a protein found in cells, can directly inactivate HIV virus and block infection in vulnerable cells. The findings offer insight into the function of alpha-defensin-1 on both the virus and the cell, potentially leading to new avenues for prevention and therapy.
A recent study found that youth with HIV who were treated with highly active antiretroviral therapies (HAART) between 1999 and 2000 reported having more sexual partners, unprotected sex, and drug use compared to those treated before 1996. The researchers suggest targeted interventions are needed to address these risk behaviors.
Researchers from Johns Hopkins Medicine found a second reservoir of HIV that harbors unique viral variants, suggesting lifelong treatment is necessary to prevent re-emergence. The archival virus has not mutated to become drug-resistant, according to recent findings.
A study found that PRO 2000 gel reduced HIV and HSV infectivity by at least 1000-fold, with no significant inflammatory response. The results suggest a potential safe and effective vaginal microbicide for preventing sexually transmitted infections.
Researchers have elucidated the structure of gp120 before its shape change, providing crucial insights into how the protein binds to the CD4 receptor and enables HIV membrane fusion. This knowledge may lead to the development of new compounds that inhibit this shape change, offering a promising route for HIV treatment and prevention.
A study led by Drs. Dennis R. Burton and Ian A. Wilson identified the specific amino acids on gp41 that 4E10 interacts with, revealing its unique ability to target a conserved region near the surface of the virus. This research advances the quest for an HIV-1 vaccine, providing valuable insights into broadly neutralizing antibodies.
Researchers at The Scripps Research Institute have identified an antibody called 4E10 that can neutralize nearly 100 different HIV strains. This breakthrough could lead to the development of a more effective HIV vaccine by targeting this specific epitope.
Researchers analyzed data from a three-year study in rural Zimbabwe and found no correlation between contaminated needle use and increased HIV transmission. The study collected data from over 1,800 participants and excluded injections as a major transmission route.
Researchers found that alpha-defensin-1 directly inactivates HIV when serum levels are low, while also acting on vulnerable cells to block infection. The study provides a basis for developing defensin-like drugs to prevent and treat HIV.
A study in Senegal found that migrants' social context influences their sexual behavior and risk of HIV transmission. In rural areas, strict social control and religion may encourage migrants to adopt safer sex practices upon return. The study suggests that migration is not a major contributor to HIV spread in Senegal.
UCLA researchers develop gene therapy approach using modified HIV to target P-glycoproteins on cancer cells, minimizing side effects and maximizing therapeutic effectiveness. The method shows promise for controlling cancer and other diseases.
A Stanford study found that early HIV screening reduces annual transmission by 21% and lengthens life by 1.5 years for those with HIV infection. Routine screenings are cost-effective compared to other commonly accepted programs, suggesting expanded HIV counseling, testing, and referral in the US.
A new study recommends expanding routine HIV screening to settings with low prevalence rates due to its cost-effectiveness. The study found that even at low prevalence levels, regular testing can provide important health benefits. Additionally, the researchers suggest that screenings should be expanded to reduce the transmission of the...