Researchers found that asthma is caused by the interaction of multiple genetic loci, contradicting earlier studies that suggested a single-gene solution. The study used an elaborate mouse model to identify specific regions on chromosomes 2 and 6 associated with airway hyperresponsiveness.
Current cardiology guidelines suggest clopidogrel as an alternative to low-dose aspirin, but recent research indicates it may impair ulcer healing and increase bleeding rates. Patients at high-risk for gastrointestinal complications should consider a combination of aspirin and stomach ulcer medications.
A new technique allows for successful cord blood transplants in high-risk acute and chronic leukemia patients, with disease-free survival rates of 57% at one year. The study's findings offer hope to thousands more patients who were previously ineligible due to lack of suitable donor units.
Researchers at Memorial Sloan-Kettering Cancer Center have identified a new oncogene called Pokemon, which is essential for cancer cell growth and transformation. The discovery opens up new avenues for targeted therapy, with a focus on blocking the protein's function to prevent cancer progression.
A recent study published by the University of Glasgow found that heroin use among Scots aged 15-54 has declined significantly, from 55,800 in 2000 to 51,582 in 2003. Additionally, the number of people injecting drugs also decreased nationally, while 18,737 still engage in injection drug use.
A team of researchers at UT Southwestern Medical Center has discovered the biochemical mechanism by which insects detect pheromones. They found that a specific protein, called an olfactory binding protein, is essential for translating pheromone signals into behavioral responses.
The study suggests that the spleen contains a population of primitive stem cells important for healing several types of damage or injury. These cells may produce an even greater variety of tissues than adult stem cells from bone marrow.
Researchers discover human body odor plays a crucial role in mosquito attraction, with certain compounds acting as repellents or masking attractant components. The findings could lead to the development of safe, naturally occurring insect repellents more effective than conventional products.
Researchers have made a major breakthrough in understanding how the FSH hormone attaches to its receptor, paving the way for improved fertility drugs. The crystal structure of FSH and its receptor reveals key details about their interaction, which could lead to the development of new oral drugs for fertility treatments.
A study confirms that implantable cardioverter-defibrillators (ICDs) are more effective in preventing sudden cardiac death than medical therapies for heart failure patients without coronary artery disease. The ICDs have shown a relative 35 percent decrease in overall mortality among these patients.
The American Gastroenterological Association recommends colonoscopy as the preferred screening method for colorectal cancer due to its ability to detect and remove precancerous polyps. In-office fecal occult blood tests are not recommended as a standalone screening test, but can be used in conjunction with flexible sigmoidoscopy.
A study found that nine different biases can cause errors in judgment when dealing with a large amount of information. Training subjects to spot these biases improved their ability to detect false-alarm opportunities and recognize specific biases, especially under time pressure.
Researchers have developed a way to distinguish and separate specific brain cell subtypes for genetic analysis using DNA microarrays. This technique will aid in understanding the development and function of the brain, potentially leading to new treatments for neurological disorders such as amyotrophic lateral sclerosis.
A study by Saint Louis University found that genetic factors account for over 50% of adult weight change, while environmental factors contribute to the remaining 50%. This suggests that individuals with a genetic predisposition to obesity face a more significant challenge in losing weight.
Researchers develop a new TMS method that produces controllable and long-lasting effects on the human motor cortex. The method uses short bursts of low-intensity pulses to overcome previous stimulation approaches' limitations.
Researchers at UCL discovered a new method to improve Transcranial Magnetic Stimulation (TMS) that can produce effects on the brain for more than an hour. By adjusting stimulation patterns, they achieved rapid and consistent changes in the motor cortex area, outlasting conventional TMS.
Researchers found a young, faint companion to a star, measuring its mass for the first time. The object is 93 times as massive as Jupiter, contradicting theoretical predictions.
Researchers at Purdue University found that a single cellular pathway produces the raw ingredients for thousands of compounds, including those with anticancer properties and fragrance. This discovery challenges long-held assumptions about plant production and has implications for essential oil production.
Hospitalized children experience preventable adverse events at significantly lower rates than adults, with birth-related and diagnostic errors being the most common types. The study suggests that processes and systems leading to adverse events in children may differ from those in adults.
Researchers examined medieval and Renaissance manuals and art to understand gladiatorial combat tactics. They infer that battles typically had three critical moments: initial contact, wounding, and grappling before concluding without bloodshed.
Researchers have unearthed four-million-year-old ancestral fossils at the Gona site in Ethiopia, shedding light on early human evolution. The discovery offers a unique glimpse into the anatomy and behavioral capabilities of our ancient relatives, revealing that they lived in low-lying areas with swamps, springs, and volcanic centers.
Researchers used PGD to select an RhD- embryo, resulting in a healthy baby girl. The technique aims to alleviate the risk of haemolytic disease of the fetus or newborn associated with RhD alloimmunization.
A study of 742 patients with newly diagnosed chronic liver disease found that ethnicity significantly impacts NAFLD prevalence, particularly among Hispanic and Asian populations. The study highlights the need for culturally sensitive education and representation in future clinical studies to address disparities in diagnosis and treatment.
Scientists have uncovered skeletal fossils of a human ancestor believed to have lived around 4.5 million years ago in northern Ethiopia. The fossils, described in the journal Nature, provide new evidence about the transformation of primitive chimp-like hominids into more human forms.
A team of researchers has solved a puzzle in climate research by explaining why micro-organisms break down carbon in soils at varying rates. The new theory predicts that an increase in climate temperatures will lead to more rapid carbon dioxide release and accelerated climate change.
Researchers developed a novel antiviral treatment using RNA interference to inhibit respiratory syncytial virus (RSV) infection in mice. The treatment, administered as a nasal drop or spray, successfully suppressed the virus's NS1 protein, preserving the host's natural antiviral defense.
Researchers have identified two genes in the interferon system strongly associated with SLE. Genetic variants of a thyrosinkinase enzyme may protect against the disease by blocking the interferon effect. The study, involving nearly 2,000 individuals, provides new insights into SLE mechanisms and potential treatment options.
An international team of astronomers using the VLT's NACO SDI camera discovered a faint companion to AB Dor A, a young star, which is 93 times more massive than Jupiter and twice as heavy as predicted. The object's mass was determined by observing its precise location and orbit around its host star.
A recent study found that male circumcision significantly reduces the risk of HIV transmission from women to men, with uncircumcised men facing a more than two-fold increased risk per sexual act. The study's results provide new insights into the rapid spread of HIV in settings where circumcision is not common.
Researchers find steady increase in Arctic river discharges since the 1960s, with annual rate of increase being 8.73 cubic kilometers per year. Human activity plays a major role in this trend, which is expected to intensify the global hydrological cycle.
A new study reveals that liver disease can impair learning ability by disrupting the glutamate-nitric oxide-cGMP pathway in the brain. Sildenafil treatment restored learning ability in rats with portacaval shunts and those with hyperammonemia, suggesting a potential therapeutic approach for patients with hepatic encephalopathy.
A study found that 60% of minors reported a parent or guardian was aware of their clinic visits, while 59% would still use the clinic for prescription contraception even with parental notification. The researchers also discovered that 18% of teenagers would engage in risky sexual behavior if parental involvement were mandated.
A new study by the University of Pennsylvania School of Medicine reveals inconsistencies in candidate-screening practices among US Assisted Reproductive Technology (ART) programs. The study found significant variation in reported likelihood of turning away candidates, with some programs accepting couples with addiction or welfare status.
A new study analyzed surveys from 2,515 asthmatic patients to identify reliable quality indicators for physician profiling. The researchers found that having a sufficient number of patients and using clear-cut indicators like asthma self-management knowledge and use of inhaled steroids can help determine the best doctor for patients.
Researchers at UCLA and VA discovered a link between lipin levels and body weight, finding that excess lipin can lead to accelerated weight gain in mice. Variations in lipin levels may play a role in why some people are more prone to weight gain than others.
A new study published in the Royal Society journal found that managing GM herbicide tolerant sugar beet crops can increase yields while reducing herbicide use. The research also shows that single glyphosate applications can enhance weed seed production, benefiting wildlife.
Scientists at UCSF's Ernest Gallo Clinic and Research Center have shown that Ibogaine decreases alcohol consumption in mice and rats by increasing GDNF levels. In separate studies, they demonstrated that GDNF alone also reduces alcohol consumption.
A study found that breast cancer patients have lower DNA repair capacity compared to control subjects, increasing their risk of breast cancer. Deficient DNA repair capacity was associated with a threefold higher risk in women with poor DNA repair capacity.
A study found that in-hospital CPR was often performed suboptimally, with many patients experiencing chest compression rates below 90 per minute and ventilation rates above 20/min. The researchers suggest that improving monitoring and feedback systems could help improve CPR quality.
The Global HIV/AIDS Vaccine Enterprise has launched a scientific strategic plan to address major roadblocks in HIV vaccine development and proposes an innovative collaborative model for researchers worldwide. The plan aims to harness new opportunities, including an expanded pipeline of HIV vaccine candidates and improved animal models.
The LCLS X-ray free electron laser will enable breakthrough science and imaging at the atomic scale, with initial funding of $54 million. Construction is set to begin in 2006, with a new center for ultrafast science expected to be operational by 2009.
Astronomers have detected Regulus' rotationally induced distortions using the CHARA array, revealing its temperature difference between polar and equatorial regions. The star's centrifugal force causes it to expand, resulting in gravity darkening, where it becomes brighter at its poles than at its equator.
A study found that African Americans are half as likely to receive surgery for esophageal cancer, experiencing poorer survival rates and undertreatment. The disparity is attributed to factors such as age, socioeconomic status, and pre-existing health conditions, highlighting the need for equal access to quality cancer care.
A quality improvement intervention for adolescents improved depressive symptoms, mental health-related quality of life, and satisfaction with mental health care. The program also increased access to evidence-based treatments like psychotherapy and counseling.
The Global Technology Confidence Index reached a new high in Q4 2004, driven by strong increases in Latin America and North America. Meanwhile, executives prioritize innovation management and technology alignment for business growth.
Scientists use NASA Airborne Visible and Infrared Imaging Spectrometer to analyze vegetation and soil changes in response to rain variation over large areas. The study found a long-term decrease in litter cover, bare soil areas, and shifts in plant responses to precipitation events.
A new coronavirus has been found in children with symptoms of Kawasaki disease, a condition that also affects the lungs. The virus was detected in 73% of Kawasaki patients but only 5% of healthy children.
A UCI professor has developed a method to measure the relationship between environment and mental well-being, finding that natural features like water and flowers are most beneficial for mental health. The study suggests that designing landscapes with these elements can enhance overall quality of life.
A new study found that adding more types to the current HPV DNA test would detect relatively few additional cases of cervical cancer but lead to thousands of unnecessary exams for women without cancer. Meanwhile, esophageal adenocarcinoma has increased by sixfold over the last 25 years, with no clear explanation for the rise.
Orphan nuclear receptors are structurally related to well-known hormone receptors but lack known ligands. Dr. Forman's work identifies novel signaling pathways and regulatory molecules that contribute to critical diseases, including fat cell formation, insulin sensitivity, and cholesterol homeostasis.
A recent study published in JAMA found that higher folate intake is associated with a decreased risk of hypertension in women. Younger and older women who consumed at least 1,000 micrograms of total folate daily had a lower risk of developing hypertension.
The addition of locoregional radiation therapy significantly improved breast cancer survival and reduced mortality in high-risk patients. A 20-year follow-up study found that the regimen resulted in a 32% reduction in breast cancer mortality and a 27% reduction in overall mortality compared to chemotherapy alone.
A 2001-2002 survey found that 25% of individuals with alcohol dependence are now dependent, 27.3% are in partial remission, and 11.8% are asymptomatic risk drinkers. The likelihood of abstinent recovery increased with age and certain factors such as marriage, family history of alcoholism, and fewer symptoms of dependence.
A collaborative care program for adolescent depression in primary care clinics significantly reduces symptoms, improves quality of life, and increases access to effective treatments. The study suggests that clinicians can effectively treat youth depression with a team-based approach.
Research found that estrogen therapy significantly increases the risk of gallbladder disease and surgery in postmenopausal women, with CEE showing a 67% increased risk. The study also revealed higher risks for cholecystitis and cholelithiasis among estrogen users.
A study found that chest compressions were given only 48% of the time without spontaneous circulation, with an average compression rate of 64/min. The researchers emphasize the importance of focusing on delivery of correct chest compressions during CPR to improve patient survival.
A gene that causes severe fat deficiency is also found to promote obesity in mice, according to new research. The protein affects body weight by altering fat storage and metabolism, with excess levels leading to increased body weight and changes in energy expenditure.
A single brain region, the hypothalamic arcuate nucleus (ARH), is sufficient for normal control of blood sugar and activity level by the fat hormone leptin. Restoration of leptin signaling in mice improves glucose homeostasis and locomotor activity.
A diverse network of marine protected areas may be essential for restoring depleted groundfish stocks. Older fish produce more eggs with increased survival chances for larvae, which can grow faster and survive starvation longer.
Researchers found that chest compressions during CPR are often too slow, shallow, and interrupted, while ventilation rates are usually too high. The study used an investigational monitor/defibrillator to measure CPR quality and compared the results to American Heart Association guidelines.