A recent genetic study reveals that humans and Neanderthals shared a common ancestor around 706,000 years ago, but the two species diverged around 370,000 years ago. The study found no evidence of genetic admixture between Neanderthals and humans, contradicting previous theories.
Exposure to environmental tobacco smoke (ETS) was strongly associated with the development of respiratory symptoms, including cough, wheeze, and dyspnea, in healthy never-smokers. The study found a particular risk among individuals with bronchial hyper-reactivity who were persistently exposed to ETS.
Research by Oregon State University found that B-vitamins are essential for energy conversion and cell production. Athletes with marginal deficiencies may experience impaired repair and building of muscle, leading to decreased performance.
Researchers have identified a gene called AMP-activated protein kinase (AMPK) that optimizes muscle activity. Genetic modification of mice expressing this activated state shows increased exercise capacity and accumulation of muscle glycogen, potentially leading to new treatments for muscle diseases and improved athletic performance.
A device implanted in US patients with severe hypertension shows significant reduction in blood pressure, averaging 22mmHg systolic and 18mmHg diastolic. The Rheos System activates the body's baroreflex system to lower blood pressure through electrical stimulation.
Researchers developed a vaccine that stimulates colorectal cancer patients' immune systems to fight cancerous cells, with 70% of patients producing TNF-alpha and GM-CSF in response. The vaccine works by generating infection-fighting white blood cells called T cells, which destroy cancer cells.
The LSU Health Sciences Center is launching a project to evaluate the influence of simulation on teamwork and patient safety in operating rooms. The research aims to develop an innovative training model that combines realistic mannequin-based simulation, patient scenarios, and a mobile mock operating room with interdisciplinary teams.
A RAND Corporation study found that nursing homes with high staff and resident vaccination rates are less likely to experience flu outbreaks. Vaccination rates of over 55% for staff and 89% for residents were associated with a 60% reduction in influenza-like illness cases.
The House Science Committee's Chairman Sherwood Boehlert and Ranking Democrat Bart Gordon call for the implementation of a new research agenda on the environmental, health, and safety implications of nanotechnology. The paper recommends prioritized priorities for examining potential consequences over the next decade and a half, which c...
Researchers analyzed mitochondrial genes of 70 lemurs suspected of being different species due to striking coat colors, finding they belonged to the same Microcebus griseorufus species. Genetic analysis revealed no significant differences among them, suggesting that morphological variations may not necessarily indicate distinct species.
Researchers at Virginia Commonwealth University conclude that antibiotics are not effective in treating short-term bronchitis, which is usually caused by viral infections. The study suggests that physicians should inform patients that there is no data to support the use of antibiotics for this condition, saving them from potential side...
Two new outreach projects involving Alaska Native and urban Appalachian communities aim to increase awareness about the importance of family health histories. The projects will develop community-based models to promote health and prevent disease, using technology to quickly read genomes and devise personalized health strategies.
Researchers have created a diagnostic test that can detect viruses like influenza, HIV, and RSV in under 60 seconds using surface-enhanced Raman spectroscopy (SERS). The technique works by measuring the change in frequency of a near-infrared laser as it scatters off viral DNA or RNA.
A new analysis by Duke University Medical Center cardiologists found that taking low-dose aspirin daily reduces the risk of heart attack, stroke, and death among patients with stable cardiovascular disease. The study also showed an increased risk of bleeding, but the protective benefits of aspirin outweigh this side effect.
A study of over 44,000 patients found that blood transfusions were associated with a benefit in those with low hematocrit levels but harm in others. For patients with moderate hematocrit levels, transfusions showed no benefit or harm, suggesting providers may reconsider their decision-making process.
Children who smoke cigarettes have nearly four times the risk of developing asthma in their teens, and those exposed to cigarette smoke in utero face an even higher risk. The study draws on data from the Children's Health Study, a longitudinal study of respiratory health among children in southern California communities.
A recent paper identifies Five Grand Challenges for research on nanotechnology risk to meet the full potential of the technology. The challenges include developing a universal aerosol sampler, assessing fiber-shaped nanoparticles' health hazards, and engineering safe-by-design nanomaterials.
A Rutgers College of Nursing professor will examine the attitudes and beliefs of young Latinas towards physical activity. The study aims to develop a culturally appropriate physical activity intervention that addresses cultural beliefs and time management issues.
Astronomers have mapped the rate of acceleration of cosmic ray electrons in a supernova remnant, showing close to maximum theoretical rates. The discovery provides evidence that supernova remnants are key sites for energizing charged particles.
Adolescents who smoke regularly have a significantly increased risk of developing asthma, with a four-fold increase in risk for those who smoked 300 or more cigarettes per year. The study found that exposure to cigarette smoke in the womb and later smoking habits also significantly raised the risk of asthma.
Researchers at Queen's University have uncovered molecular mechanisms of a cancer-causing protein linked to thyroid cancer, paving the way for new treatments and potential prevention methods. The study provides valuable tools for targeting specific actions of the protein, which may aid in the development of anticancer therapies.
A study published in Clinical and Applied Thrombosis/Hemostasis reveals Pycnogenol, an antioxidant plant extract from pine tree bark, effectively reduces swelling in patients taking antihypertensive medications by 36%. The treatment also improves blood circulation, avoiding blood pooling and reducing edema.
Research on mice carrying a mutated human gene for alpha-1-antitrypsin deficiency found that a non-steroidal anti-inflammatory drug significantly increased liver damage. The study suggests that NSAIDs could exacerbate liver injury in people with alpha-1-AT deficiency, highlighting the need to avoid these drugs.
Fourteen top scientists propose five critical challenges for nanotechnology risk research, including identifying potential health and environmental hazards. They will discuss their recommendations at a live webcast on November 16th, 2006.
The collaboration reveals that modern human and Neandertal DNA sequences diverged on average about 500,000 years ago. The sequencing team aims to reconstruct a draft of the 3 billion bases that made up the genome of Neandertals, shedding light on human biology.
A recent study published in BMC Evolutionary Biology found that lemurs with strikingly different coat colors are genetically related and belong to the same species. The research analyzed mitochondrial genes from 70 mouse lemurs, showing they all belong to Microcebus griseorufus, regardless of their geographical location.
Researchers developed a new formula to design flows that break polymers into specific lengths or withstand certain flows, with potential implications for industries like shipping and oil. This discovery also enables more precise control over the length of DNA strands in genome sequencing.
Researchers discovered a new pathway that regulates the p53 protein, a key molecule controlling cancer in humans. The study suggests potential approaches to diagnosing or intervening in cancer progression.
The U.S. Vaccine and Infectious Disease Organization has discovered a crucial pathway that supports the influenza A virus's ability to reproduce itself. This finding could lead to the development of new live vaccines and antiviral drugs for influenza epidemics and pandemics.
The genomes of Neanderthals and modern humans are at least 99.5-percent identical, yet there is no evidence of significant crossbreeding between the two species. This finding has significant implications for our understanding of human evolution and ancestry.
Researchers discovered a novel 'Trojan Horse' agent, VEGF121/rGel, that completely prevented bone tumor development in 50% of mice. The agent stops specialized cells within the bone from chewing up bone material to make room for implanted tumors to grow.
Vanderbilt researchers have successfully produced movies that provide the first direct view of the initial stage of myelin sheath formation in nerves. The process is more dynamic than previously thought, with cells continually sending out tiny tentacles to readjust their positions.
Researchers developed a nanoparticle delivery system that targets brain tumors, allowing for higher doses of drugs to be delivered while minimizing harm to healthy tissue. The technology has the potential to improve treatment outcomes and eliminate common side effects associated with photodynamic therapy.
Researchers have identified key genetic changes required for the H5N1 avian influenza virus to adapt to easily recognize human receptors. The study provides a molecular blueprint for these changes, which could help detect pandemic strains earlier and prepare public health officials and vaccine manufacturers.
A team of researchers found that controlling population peaks on the edges of the gypsy moth range can help slow their invasion into virgin territory. The study's findings suggest that suppressing outbreaks near the invasion front could reduce the number of dispersers and prevent periodic surges of growth.
A study analyzed 227 adult patients with neck pain who participated in a larger prospective, randomized, open-label study. After four weeks, patients reported a 30.7% reduction in pain intensity, suggesting that Kadian offers broad utility for even the most disabling types of chronic pain.
Researchers found a key region in the brain of primitively social paper wasp is better developed in dominant females than in subordinate ones. In contrast to highly social species, where age and foraging tasks influence brain development, dominance interactions dictate task performance in primitively social colonies.
A new study led by Dr. Deborah Dean suggests that Chlamydia trachomatis is evolving rapidly through recombination, creating new strains and potentially new diseases. The bacterium's ability to customize its attack increases the risk of emerging diseases.
A new procedure at UCLA's Jules Stein Eye Institute uses fine-needle aspiration to collect cancer cells from the living eye and predict high-risk tumors. The test has shown promise in reducing mortality rates among ocular melanoma patients.