Researchers propose a new classification system for addictive drugs based on their effect on dopamine levels in the brain. This new classification may help in directing research towards more effective treatment of addiction.
A new study examines the ecological impacts of commercial cockle dredging on intertidal ecosystems and finds that exploitation leads to a decline in a seabird species by 80%. The research reveals that even the birds' adaptable digestive system cannot save them from starvation due to degraded food conditions.
Researchers created a detailed genetic map of the mouse genome using two groups of mice, tracking over 10,000 SNPs to identify patterns of inheritance. The study found variations in recombination rates across the genome, between sexes, and identified sequence motifs that may be representative of recombination hot spots.
Researchers have identified characteristic changes in cerebrospinal fluid that may serve as biomarkers for psychosis, including schizophrenia. These findings suggest a potential new approach to understanding and treating these conditions.
Researchers developed radioimmunotherapy to target and kill HIV-infected cells using antibodies. By injecting radioactive antibodies into mice with deficient immune systems, the treatment successfully reduced HIV-infected cell numbers and showed promise for eradicating the virus.
A study found that one-third of Ugandan adolescents use the internet for health-related information, while another third would go online to learn about HIV/AIDS if it were free. The findings suggest initiatives improving online access and tailored content for young people could make a difference in Africa.
Researchers suggest lamivudine as a PREP candidate due to its relative safety and ease of use. Randomized clinical trials are needed to evaluate its efficacy in preventing new HIV infections.
Researchers analyzed ocean water samples from four regions, identifying over 91% new DNA sequences not present in existing databases. The study found that regional differences in geography and environment select for distinct viral communities.
A group of advocacy organizations recommends educating health professionals about decision-making, evidence evaluation, and responsible promotion practices. They aim to reduce the influence of pharmaceutical marketing on healthcare outcomes.
Two researchers argue that there is no conclusive evidence to support the link between HIV stigma and the global epidemic. Instead, they suggest that stigma may help slow the spread of the disease by reducing opportunities for contact between high- and low-risk groups.
Researchers have identified a novel genetic change causing aHUS, a chronic disease that causes kidney failure and can be inherited. The mutation affects the factor H protein, which is crucial for controlling the complement system, and may lead to poor transplant outcomes.
Two studies use spatially explicit models to quantify ecosystem services and their costs, guiding conservation planning in Paraguay and California. The approaches reveal tradeoffs between biodiversity and ecosystem services, highlighting the need for a systematic framework that balances both.
A new study suggests that dementia will become increasingly common as life expectancy rises, particularly among older women. The researchers found that a higher level of education was associated with only a slightly lower risk of dementia before death.
Researchers identified a gene expression profile associated with late radiation toxicity, correctly classifying 63% of patient populations. The study suggests that some patients are genetically predisposed to develop late-radiation toxicity and provides clues about molecular pathways involved.
A new theory suggests that phenotypic plasticity acts as a barrier to invasion unless invaders are given a huge competitive advantage. Invasions often alter ecological relationships, requiring species to modify traits to survive.
Researchers developed a classification system to improve the effectiveness of blinding methods, leading to better trial design and interpretation. Published studies often lack detail on blinding methods, highlighting the need for improved guidelines.
The imminent executions of six foreign health workers in Libya will have severe repercussions for the global healthcare community. The case has garnered widespread criticism from the scientific and medical fields, highlighting the importance of protecting healthcare workers' rights.
A unique study published in PLoS Medicine found significant differences in street-based drug use patterns between African American and white men, with implications for tailored interventions. The research highlights the importance of understanding cultural backgrounds and motivations to improve patient access and adherence to care.
Researchers found that high-fitness parents led to lower reproductive success for their offspring, particularly sons and daughters. This challenged the theory that females benefit from passing on good genes through sons.
A randomized trial found that high-dose folate supplementation increased the likelihood of treatment failure when used with sulfadoxine-pyrimethamine for malaria in pregnant Kenyan women. The study advises against using high-dose folate supplements in antenatal clinics where sulfadoxine-pyrimethamine is used to treat or prevent malaria.
Researchers found that yeast cells deal with potassium limitation by producing and excreting amino acids, similar to a detoxification system in mammals. In low potassium conditions, yeast cells are more susceptible to ammonium toxicity, leading to increased amino acid excretion.
Researchers at Harvard Medical School found increased thickness of two brain areas in people with migraine compared to healthy controls. The study used magnetic resonance imaging and identified structural differences that may explain visual processing problems during attacks.
A new study published in PLoS Medicine found that older people with diabetes are at a higher risk of dying from cardiovascular disease, with the risk being particularly high for those treated with insulin injections. The study followed nearly 6000 individuals over 65 and found that approximately 50-60% of deaths were attributable to ca...
A new study found that 30% of nations have not prioritized either vaccine nor drugs, while 49% prioritize antiviral drugs and 62% prioritize flu vaccines. The allocation decisions vary across countries, with healthcare workers consistently ranked top, but a wide variation in choosing next in line.
A new study published in PLoS Genetics has identified specific DNA regions that have accelerated their evolution in humans compared to chimpanzees. These 'Human Accelerated Regions' (HARs) are located near genes involved in growth and development, suggesting they may play important roles in human evolution.
A new study reveals that plataspid stinkbug gut symbionts have evolved in tandem with their hosts, sharing unique genetic traits. The symbiotic lifestyle is crucial for the stinkbugs' survival, and its influence on genome evolution has been observed.
The Burmese junta's inadequate response to HIV, TB, malaria, and avian flu has led to weakened laboratory infrastructure and a lack of skilled personnel. This hinders the country's ability to effectively control these diseases, with high rates of infection and rising resistance reported.
A study published in PLOS Medicine found a strong association between heavy alcohol consumption and high-risk sexual behaviors in men and women in Botswana. The research highlights the need to address alcohol abuse within HIV prevention programs, considering cultural and social significance of alcohol use.
Researchers from London School of Hygiene and Tropical Medicine found that a combination of artemether and lumefantrine was the most cost-effective option, despite being the most expensive in the short term. This approach may delay the emergence of resistance to malaria drugs.
Researchers have developed a gene therapy treatment that restored retinal function to near-normal levels and prevented degeneration in cones of mice with Leber congenital amaurosis. The study shows promise for potential human applications, offering new hope for individuals affected by this condition.
Researchers investigated XPD allele interactions using compound heterozygote mice, finding that combinations of mutant alleles alleviated disease symptoms and improved gene function. This challenges the existing monoallelic paradigm, suggesting biallelic effects may occur in some patients.
Researchers found that KEAP1 mutations in lung cancer cells increase NRF2 activity, leading to chemotherapy resistance. Meanwhile, a new study suggests targeting school-aged children for flu vaccination could help contain outbreaks.
A new study has identified a key player in HIV-1's nuclear import process, revealing that host cell tRNA molecules facilitate the entry of the virus's reverse transcription complex into the nucleus. This finding sheds light on the complex mechanisms by which HIV-1 integrates its genetic material into host cells.
Researchers used carnivorous pitcher plant food webs to study habitat loss effects on species abundance. Trophic interactions, such as predator-prey relationships, dominated abundance predictions, unlike previous modeling frameworks that relied on habitat contraction or keystone species effects.
A study in Heliconius butterflies reveals that a single 'supergene' controls the variation of their wing patterns. The researchers found that this supergene region, responsible for producing diversity in color patterns, is conserved across three species.
Researchers found that tailored dietary advice delivered through an internet shopping system led to participants buying foods lower in saturated fat. This study demonstrates the potential of low-cost technologies to motivate users to change their behavior.
A new study published in PLOS Pathogens suggests that doxycycline can reduce the pathology of lymphatic filariasis by targeting Wolbachia bancrofti. The treatment shows promise as an ameliorating option for individuals with adult worms, potentially providing relief from debilitating swelling and genital areas.
The Public Library of Science (PLoS) has launched PLoS Neglected Tropical Diseases, a new open access journal focused on the world's most neglected diseases. The journal aims to promote science, policy, and advocacy for diseases affecting poor countries, with a focus on rigorously peer-reviewed research.
A systematic review of international research found that there is no clear difference in the effectiveness of treatment provided by teaching and non-teaching hospitals. However, the researchers suggest that specific diseases may have different outcomes, and their findings will be useful for training doctors while providing the best car...
Researchers identified eight distinct regions in the US with varying life expectancies, with gaps between best-off and worst-off groups exceeding 15 years. Chronic diseases and injuries were found to be major contributors to these disparities.
A study published in PLoS Medicine found a possible association between the use of selective serotonin reuptake inhibitors (SSRIs) and severe violence in a small number of individuals. The authors analyzed data from various sources, including prescription-event monitoring studies and legal cases, to examine this potential link.
Researchers developed live attenuated vaccines using weakened influenza virus proteins and found they elicited broad and lasting immunity in mice and ferrets. The vaccines provided protection against different H5N1 viruses that emerged years later, demonstrating potential as a future treatment option for avian flu.
Research found that air travel affects both the peak date and rate of spread of flu in the US. The study analyzed government records on deaths from flu and pneumonia between 1996 and 2005 and discovered that flu season started about two weeks later than usual after 9/11 restrictions on air travel were implemented.
A comprehensive review of SARS treatment efficacy has found no evidence that any treatments were effective in treating the virus. The review examined 54 SARS treatment studies and 15 in-vitro studies but concluded that none of the treatments were successful.
A recent study confirms the 'island rule,' where small animals evolve into oversized versions of their continental counterparts, while large animals shrink. Island species exhibit accelerated evolutionary changes over short time frames, with a faster rate of evolution than mainland species.
A new study ranks the top applications of regenerative medicine for improving health in developing countries, including novel insulin replacement and pancreatic islet cell regeneration for diabetes. Regenerating failed heart muscle using a patient's own cells is also highly ranked.
Researchers argue that Uganda's dramatic decline in HIV rates was partly due to the 'ABC' approach, which included policies to advance women's status. However, critics counter that the approach assumes unrealistic social circumstances for young women, putting them at risk of exploitation and ignorance.
Advances in biology are hindered by obstacles such as dwindling National Institutes of Health budgets and overly burdensome regulatory requirements. The Association of American Medical Colleges has outlined key recommendations to promote translational research, including increased investment in medical schools and teaching hospitals.
A new study published in PLoS Medicine suggests that delivering rheumatoid arthritis drugs directly into the central nervous system improves treatment outcomes. Researchers found that blocking a protein called p38 with spinal cord administration reduced inflammation, arthritis, and joint destruction in arthritic rats.
Rhesus monkeys display neonatal imitation, reproducing human tongue protrusion and lip smacking after watching experimenters perform similar gestures. The study suggests that imitation may have evolved earlier in the primate tree than previously thought.