A randomized trial found that adding chemotherapy to tamoxifen significantly increases disease-free and overall survival rates for postmenopausal women with lymph node-negative, ER-negative breast cancer. In contrast, no survival benefit was observed for those with ER-positive tumors.
Patients with ER-negative tumors who received chemotherapy had a 15% increase in disease-free survival and 89% overall survival rate. In contrast, those with ER-positive tumors did not show additional survival benefits from chemotherapy. The study suggests tailoring cancer treatments to patient characteristics.
Researchers discovered a compound that selectively inhibits the growth of breast cancer cells engineered to overexpress HER-2, a protein implicated in 20-30% of human breast cancers. The compound, F16, targets the mitochondria of cancer cells, causing them to swell and eventually rupture, leading to cell death.
A JAMA article examines the ethics and law surrounding commercial filming of patient care activities in hospitals, highlighting potential risks to patient privacy. The authors propose guidelines for informed consent before filming, balancing commercial interests with patients' rights.
A recent survey found that many federal supervisors are unaware of available accommodations for workers with disabilities, including those applying for jobs or using telecommuting options. The study suggests that the government needs to improve education and resources to help supervisors better accommodate employees with disabilities.
The study found that exposure to ELF-EMF alone did not affect cell division, but combining it with ionising radiation caused cells to slow down at checkpoints. This suggests ELF-EMF may enable damaged cells to divide further, increasing cancer risk.
Research suggests that nonsteroidal anti-inflammatory drugs like aspirin may be effective in treating uterine cancer by inhibiting the COX-2 enzyme. The study also found increased levels of COX-2 and prostaglandins in endometriosis, a painful condition where tissue from the uterus attaches to other organs.
A study found that participants receiving automated, computer-based telephone intervention increased their level of physical activity after three months. However, the effectiveness dropped off by six months. The researchers suggest continued refinement of automated telephone interventions.
A study found that cigarette advertising and promotions can circumvent the protective effects of authoritative parenting. Teens from less authoritative households are more susceptible to tobacco ads and promotions. Parents can counter this by discussing marketing tactics with their teenagers.
Scientists have identified a key trigger of neuron death in Parkinson's disease, stroke, and traumatic brain injury, which can be prevented by blocking its release from mitochondria. The study found that preventing PARP activation and blocking AIF release protects cells from dying.
Researchers at Texas A&M University have created a haptic device called 'Touché' that allows chemists to feel the interaction between molecules, enabling more accurate drug design. The device enables simulation of large numbers of atom interactions in a short period, improving pharmacological research.
A new study reveals acid rain's damage to American forests is more widespread than believed, potentially creating compromised immune systems in trees. The study suggests that acid rain can suppress the capacity of trees to survive environmental stresses, with far-reaching consequences for forest ecosystems and wildlife.
The US team achieved top honors with three gold medals in 1999, including the top gold, and one silver. The students were selected from a rigorous two-week training camp and received college-level training on organic chemistry.
A study of 44,241 women found that postmenopausal estrogen-only therapy increases the risk of ovarian cancer by 60%, with a greater risk for those using therapy for 10 or more years. The relative risk was highest for women who used estrogen for 20 or more years.
Scientists will investigate high, tropical cirrus clouds in Florida to reduce uncertainties in forecasts of the Earth's future climate. The Cirrus Regional Study of Tropical Anvils and Cirrus Layers - Florida Area Cirrus Experiment (CRYSTAL-FACE) aims to improve large-scale measurements of clouds using aircraft and satellite data.
Researchers found that measuring Mcm5 levels in urine could detect bladder cancer with higher sensitivity than current tests. Additionally, a study linked effective DNA repair capacity to poorer survival rates in NSCLC patients treated with chemotherapy.
Researchers are developing a forecasting technique to predict sea nettle concentrations in Chesapeake Bay using real-time monitoring of environmental factors. The goal is to mitigate the economic impact of sea nettles, which affect tourism and the food web by devouring fish eggs and larvae.
Researchers found that blocking interleukin-1 can prevent additional brain tissue damage, suggesting a new potential treatment for traumatic brain injury and neurodegenerative diseases. By inhibiting IL-1, macrophage activation is reduced, leading to less inflammation and cell death.
Researchers at Kansas State University have developed an optically-active structure with a diameter smaller than a human hair based on III-nitride wide bandgap semiconductors. The tiny structures can be used as miniature displays, detectors, sensors or hyper-bright LEDs.
A recent study found that only 14 out of 81 clinical obstetric texts recommend abstaining from alcohol during pregnancy. Many texts instead offer vague or contradictory advice, leading to concerns about physician behavior and patient safety. The lack of clear guidance may stem from the absence of a safe level of drinking during pregnancy.
A recent study found that 31.7 percent of Americans had been sunburned within the previous 12 months, with white men being the most likely to experience sunburn at 44 percent. Higher education and income levels were also associated with higher rates of sunburn, highlighting a concerning trend among young adults.