A genetic study of 14,000 people found two genes, alpha 3 and alpha 5 nicotinic receptor subunits, to be associated with an increased risk of heavy smoking. The implicated DNA variants can be used to predict ability to quit using existing medications, potentially leading to more efficient treatment.
Researchers found that brain-derived neurotrophic factor (BDNF) and its receptor TrkB play a crucial role in age-specific responses to stimulants. The study suggests that BDNF/TrkB might be used as a target for new treatments for childhood neuropsychiatric disorders or addiction.
Researchers at McMaster University found that exposure to nicotine in the womb impairs a baby's ability to respond to oxygen deprivation after birth. This impairment can lead to an increased risk of Sudden Infant Death Syndrome (SIDS).
Researchers used fMRI to show that cocaine-related images stimulate activity in the limbic system, a brain network involved in emotion and reward, even when subjects are unaware they've seen anything. The study suggests new drug treatment strategies by targeting the brain's sensitivity to conditioned drug cues.
Hydroelectricity dams are decreasing Lake Victoria's level by at least two meters, threatening food security and fisheries in Uganda, Kenya, and Tanzania. The dams' overuse has led to papyrus wetland collapse, eutrophication, and algal blooms, with far-reaching consequences for the lake's ecosystem and local populations.
A national study found digital mammography performed better than film in pre- and perimenopausal women under 50 with dense breasts. The study, DMIST, also showed improved diagnostic accuracy for digital mammography over film for some subgroups.
Researchers at the University of Wisconsin-Madison found that Andean potatoes were introduced to Europe around 1700, while Chilean potatoes became popular 34 years earlier, contradicting previous theories about their origins.
Scientists have found that male Anna's hummingbirds create a distinctive chirping sound by spreading their tail feathers during dive displays, which is used to attract females and deter rivals. The unique mechanism, similar to the whistling of ducks, sheds new light on bird sound production.
A new study suggests that taking folic acid supplements for at least one year before pregnancy can significantly reduce the risk of premature birth. The research found a 50-70% decrease in early preterm deliveries, with the greatest reduction seen in very early premature births.
Scientists have uncovered a previously unknown mechanism that causes embryonic germ cells to go through a period of transcriptional silence, preventing the production of sperm or eggs. This regulation is crucial for germ cell development in various organisms and may hold significance for mammals as well.
A RAND study reveals California's basic tracking system architecture allows for close student progress follow-up but faces political and financial barriers. Implementing a comprehensive student unit record data system could improve policies and enhance student outcomes.
Researchers are exploring optimal dosage and timing for stem cell therapy in adults with strokes and newborns with ischemic injuries. Pilot studies indicate a 25% improvement in recovery, leading to plans for clinical trials within two years.
A new study published in Radiology found that digital mammography is more accurate than film mammography for women under 50 with dense breasts. The Digital Mammographic Imaging Screening Trial (DMIST) compared the accuracy of both methods in different subgroups, confirming improved diagnostic accuracy for digital mammography in pre- an...
A recent Johns Hopkins Medicine study suggests that the current standard for heart transplant hospitals may be too lenient. The researchers recommend increasing the benchmark from 10 to 14 heart transplants per year, as high-volume centers consistently show better survival rates and fewer complications.
Researchers identify nerve that transmits signals of chemotherapy-associated illness from small intestine to brain, offering new approach to reduce debilitating side effects. Anorexia and cachexia often accompany chemotherapy symptoms, compromising patient's nutritional status.
A Purdue University archaeologist has uncovered an ancient iron ore mine in South America, showcasing the importance of hematite to ancient Andean civilizations. The discovery provides valuable information on the Nasca people's use of minerals for ceramic paints and other purposes.
Researchers at the University of Pittsburgh's Center for Vaccine Research have developed a vaccine against the deadliest strain of avian flu, H5N1. The vaccine produced a strong immune response in mice and protected them from death following infection with the virus.
A study found that secondhand smoke exposure is associated with decreased lung function in individuals with cystic fibrosis. Certain mutations in the CFTR gene determine the magnitude of this effect, suggesting a potential role for gene-environment interactions in worsening lung outcomes.
Chimpanzees were reluctant to engage in extreme deals involving valuable commodities like apple slices for grapes. Despite being trained, they preferred to keep what they had. The researchers found that chimpanzees lack social systems to enforce deals and property ownership norms, which likely contributed to their reluctance.
Researchers discovered that mast cells in the lungs release renin, an enzyme that helps trigger bronchoconstriction, a hallmark of asthma. This finding suggests potential new targets for treatment against asthma and other respiratory diseases.
Researchers found that breakdown of self-cleaning mechanism in kidneys can lead to dysfunction and disease. The study suggests that defects in this clearance mechanism can cause accumulation of toxic substances, such as autoimmune antibodies, which can damage the kidney.
Researchers found that the biodegradable film reduced severe scarring by 30% compared to controls. The film was effective in reducing adhesions in patients with high-risk procedures, such as cardiopulmonary bypass and delayed incisions.
Researchers at University College London used a virtual human simulation to predict the effectiveness of an HIV drug against resistant mutations. The study could lead to tailored treatment approaches for patients developing resistance to their drugs.
Researchers discovered that magnetite's magnetic strength halves when subjected to pressures between 120,000 and 160,000 times atmospheric pressure. The change is due to a decrease in unpaired electrons, which affects the spin of magnetic materials.
A collaborative analysis of 18 prospective studies found no link between circulating sex hormones and prostate cancer risk. High levels of male sex hormones were previously thought to be a risk factor, but the results indicate that testosterone and estrogen do not play a significant role in prostate cancer development.
Researchers found Ki-67 expression associated with poorer disease-free survival, but not predictive of chemotherapy benefit. Pathology reports offer a reliable alternative for determining ER status in breast cancer trials.
Research at MIT suggests that aquatic plants in rivers can help dampen storm surge, lower nutrient levels, and promote sediment accumulation. By understanding how water flows through plant canopies, ecologists can determine the optimal vegetation patch length and planting density for river restoration.
Mice fed human diet exhibit distinct liver gene expression profiles compared to those on a chimpanzee diet, suggesting dietary influences on physiological differences between humans and other apes. This study replicates previous findings in mice fed different diets.
A study found that microRNA expression patterns are differentially expressed in colon tumor tissues, with certain miRNAs associated with poor survival and treatment outcomes. The researchers identified miR-21 as a potential diagnostic biomarker for colon adenocarcinomas and survival prognosis.
A three-year study will be conducted in UK prisons to investigate the impact of nutrition on behavior, including violence and self-harm. The study aims to identify the most important nutrients for brain function and behavior.
American cancer researcher Professor Robert A Weinberg has been awarded the new Swedish science prize, which recognizes his pioneering discoveries in basal tumour biology and tumour suppressant genes. He will give lectures at Karolinska Institutet and forge links with researchers to advance cancer research.
A recent study by Kathleen Vohs and Jonathan Schooler found that individuals who believe in their own free will are less likely to cheat and steal money compared to those with weakened convictions. The researchers used a priming method to manipulate participants' beliefs about free will, leading to significant results.
Researchers at Johns Hopkins Medicine discovered that secondhand smoke exposure can weaken lung function in patients with cystic fibrosis. The study found that even a small genetic change can double the negative effects of secondhand smoke on lung function, accelerating reduced lung function and lifespan.
A novel treatment for DVT uses a fiber-binding agent to clear clots rapidly and safely, with 90% of patients experiencing complete resolution of symptoms after six months. The therapy reduces the risk of bleeding and post-thrombotic syndrome, enabling patients to resume normal activity within a week.
A new study reveals that carbon monoxide directly damages heart muscle, leading to long-lasting cardiac function impairment. CO's effect on heart muscle is unrelated to oxygen deprivation in the recovery phase.
Researchers analyzed data from nearly 30,000 women with breast cancer and found that female surgeons were more likely to prescribe post-surgical radiation therapy. Women who received radiation had a surgeon trained in the US or with an M.D. degree compared to a D.O. degree.
Researchers at UC Berkeley developed an adhesive that masters the gecko's grip-and-release trait, with a strong hold that gets stronger with use. The material uses tiny plastic fibers to establish traction, making it suitable for climbing equipment and medical devices.
Researchers at MD Anderson Cancer Center report a new kidney cancer drug that targets the FLT3-ITD mutation in AML, reducing leukemia cells by 90% in patients. The drug has shown minimal side effects and is being tested in combination with chemotherapy.
The 'Incisions' gown is a unique teaching aid that uses zips to show where surgeons make cuts in the body. It aims to supplement traditional plastic models and help medical students understand the significance of the body as well as its structure.
Scientists have created a new material featuring 'nanonails' that can repel almost any liquid, but become wettable when an electric charge is applied. This innovative surface has potential applications in biomedical technology and battery life extension.
A study published in PLOS Neglected Tropical Diseases found that Nigerian children attending government-owned schools have a higher prevalence of intestinal worms than those attending private schools. The water supply and sanitation conditions were also poorer in the government schools.
Researchers at the University of Copenhagen have developed a method to determine a person's birth date using eye lens proteins, which remain unchanged after childhood. This technique has potential applications in health science research and forensic analysis, such as studying cancer tissue regeneration.
Researchers at Frankfurt's Research Center for Neurotechnology have developed new artificial vision systems using neural organization principles. These systems aim to combine individual functions to form a functioning whole, leading to potential applications in intelligent security and autonomous vehicles.
A molecular change found in human prostate cancers triggers growth of prostate cancer in mice and human cell lines. The overexpression of ERG transcription factor is thought to activate cell-invasion programs, displacing basal cells by neoplastic epithelium.
The JDRF Autoimmunity Center will focus on developing novel antigen-specific approaches to predict, prevent, and possibly reverse type 1 diabetes. The center will utilize the Barbara Davis Center's resources in collaboration with JDRF to create therapies specifically aimed at immunoprevention of type 1 diabetes.
A study of 227 breast cancer patients found that those who participated in a psychological intervention program had better health and functioning scores, with a 7% increase compared to non-participants. The program included training on relaxation, coping with stress, and strategies for improving health behaviors, resulting in fewer sym...
A new study highlights the link between depression and risky behavior among juvenile offenders. The research suggests that depression screenings should be included in the juvenile intake process to identify appropriate mental health interventions. This could lead to positive health outcomes for high-risk youth who have an arrest history.
Researchers found that human mesenchymal stem cells (hMSCs) and bone marrow stromal cells (BMSCs) can migrate to damaged brain tissue after a stroke, improving neural function. The transplanted cells may also enhance tissue repair and functional recovery.
A new study funded by the Defense Department aims to develop a drug based on carbon nanotubes to prevent acute radiation injury deaths. The experimental drug, Nanovector Trojan Horses (NTH), has shown promising results in preliminary tests, with mice showing enhanced protection when given first-generation NTH drugs prior to exposure.
A Penn State University research team investigated the simultaneous effects of numerous factors on microsatellite mutability, finding that repeat number, length, and composition are significant predictors. The study has applications in medical genetics, forensics, and conservation genetics.
A new study found that combining coronary artery bypass grafting (CABG) with surgical ventricular restoration (SVR) reduces the likelihood of subsequent heart problems by 24%, compared to 55% for CABG alone. SVR improves heart function, enabling patients to stay active and participate in daily activities without exhaustion.
Research reveals high-dose methotrexate significantly increases average survival rate to 4.5 years, outperforming radiation therapy with a one-year average survival rate.
Researchers at Northwestern University developed back-illuminated APDs that detect single photons in the ultraviolet region with high sensitivity. The devices have excellent uniformity and can be used to create secure communication systems and biological agent detectors.
The FIBER e-journal aims to assist the fashion and apparel industry in learning about emerging world markets and sharing best practices for working internationally. The journal highlights critical apparel production centers and emerging markets, including Guatemala, China, India, Thailand, and Italy.
Scientists used a transgenic system to monitor developmental regulated alternative mRNA splicing in live C. elegans worms, revealing conserved molecular mechanisms across metazoan evolution. The study enables experimental analysis of regulation mechanisms underlying alternative splicing patterns.
The PEM/PET system can spot tumors half the size of standard imaging systems, and complete an image and biopsy in a similar time frame. It features high-resolution PET images of the breast, guiding needle biopsies with a robot arm.
Researchers from Université de Montréal and Cary Institute found that commercial fishing plays a declining role in removing man-made nitrogen from coastal waters. Nitrogen-rich fertilizer run-off has increased nitrogen levels in coastal ecosystems, causing excessive plant growth, lack of oxygen, and reduced fish populations.
A large-scale drug comparison trial involving 23,077 people with both high blood pressure and metabolic syndrome found that diuretics significantly reduced the risk of heart disease. Diuretics were particularly effective in reducing cardiovascular disease in black patients, who have a higher incidence of hypertension.
A recent study published in the Archives of Internal Medicine found that individuals with sedentary lifestyles exhibit shorter telomeres, indicating an accelerated aging process. Regular exercise, however, has been shown to reduce oxidative stress and inflammation, which may help mitigate this effect.
Scientists propose using ancient light absorbed by neutral hydrogen atoms to test string theory predictions. A gigantic array of radio telescopes would be needed to make the measurements.