A new theory on aging, proposed by Ronald D. Lee, suggests that natural selection favors animals capable of devoting energy to insure survival of the next generation. This theory attempts to fill in gaps of previous ideas on aging and its relationship with nurturing behavior.
Research suggests that individuals with higher education levels exhibit less cognitive decline in Alzheimer's disease due to increased brain adaptability and flexibility. The study, which analyzed autopsied brains of deceased participants, found a significant association between education and reduced AD pathology.
Researchers found that women taking estrogen and progestin experienced a twice increased risk of dementia compared to those on placebo pills over a 5-year period. The most common type of dementia was probable Alzheimer's disease, accounting for 66% of cases.
A new study in rats reveals that gene activity plays a significant role in brain aging and cognitive impairment. The research identified 146 genes associated with age-related changes in memory performance, including those involved in inflammation, oxidative stress, and neuronal function.
A study found that enhanced counseling and support interventions significantly reduced depression symptoms in caregivers, with benefits sustained over a 5-year period. The intervention involved individual and family counseling sessions, as well as ongoing support groups.
In a study, mice fasted every other day had lower blood glucose and insulin levels than control or calorically restricted groups. Meal-skipping also improved nerve cell resistance to neurotoxin injury, suggesting potential benefits for neurological disorders such as Alzheimer's disease.
Researchers found that ovarian cancer cells produce collagen VI, which remodels their environment to make them more resistant to chemotherapy. This could lead to new therapeutic interventions to overcome chemotherapy resistance and improve survival rates for women with ovarian cancer.
Researchers found that increasing neprilysin levels decreased amyloid deposition and reduced plaque load in transgenic mice. Astrocytes also degraded beta-amyloid peptides, suggesting a new target for AD therapies.
Research suggests that high intake of unsaturated fats may be protective against AD, while saturated and trans-unsaturated fats increase risk. Additionally, studies found no association between antioxidant vitamin intake and reduced AD risk.
Researchers found that intermittent fasting reduced degeneration of nerve cells and improved glucose regulation in mice with mutant huntingtin. This suggests that fasting may forestall the development of Huntington's disease in humans.
A recent study found that a combination of growth hormone and sex steroids showed significant increases in lean body mass and decreases in fat mass, but also reported common side effects such as joint pain and swelling. The study suggests that the treatment is not yet ready for prime time due to its adverse effects.
A study published in the Journal of the American Medical Association found that training improved certain thinking and reasoning abilities in older adults. The training focused on developing strategies to improve memory, problem-solving, and concentration, but did not affect daily living skills.
A new study by Wake Forest University School of Medicine has confirmed the existence of diastolic heart failure, a condition that affects older adults' quality of life and exercise capacity. People with this condition experience severely reduced physical ability and increased neuroendocrine activity.
Researchers have discovered a promising new treatment that preserves bone mass in both female and male mice without affecting reproductive organs. Estren, a class of compounds called ANGELS, appears to trigger bone-building activities without the side effects associated with sex hormone therapy.
A study published in The New England Journal of Medicine found that a prehabilitation program improved balance, muscle strength, and mobility in physically frail elderly individuals. The program, which included physical therapy and resistance band exercises, significantly reduced disability scores compared to a health education group.
Researchers found elevated levels of ceramides and cholesterol esters in spinal cords of people with ALS, leading to motor neuron degeneration. Treating these lipids with a drug called ISP-1 may prevent this process.
Researchers analyzed biomarker data from over 700 healthy men and 60 rhesus monkeys, finding lower body temperatures, blood insulin levels, and higher DHEAS levels in those on a calorically restricted diet were associated with longer lifespan. The study suggests potential for developing compounds that mimic the benefits of caloric rest...
As more older Americans outlive their driving privilege, they face unforeseen economic and social burdens. The study found that over 600,000 people age 70 or older stop driving each year and become dependent on others to meet their transportation needs.
Research by James P. Smith and Dana P. Goldman found that education level is a significant factor in adherence to treatment regimens, particularly for complex diseases like HIV and diabetes. The study suggests that education can help improve health outcomes by promoting better adherence to treatment plans.
A population-based study suggests that a diet high in foods containing vitamin E may help protect against Alzheimer's disease, with the most significant protective effect found among those with the lowest dietary vitamin E intake. The study also found no association between vitamin E supplements and reduced risk of AD.
A study found that sisters of centenarians have about half the risk of dying at any given age compared to the national average. Brothers of centenarians also exhibit low mortality rates, especially during young adulthood, increasing their chances of becoming centenarians.
Researchers found that folic acid deficiency led to decreased neurons and increased homocysteine levels, causing DNA damage in the hippocampus. Adequate folate intake helped repair this damage, suggesting a possible cause-effect relationship between folic acid and Alzheimer's disease prevention
Elevated homocysteine levels are strongly linked to increased risk of dementia and Alzheimer's disease, doubling the chance of developing AD. The study found that consistently high homocysteine levels throughout the period of the study were at highest risk for dementia and AD.
A study by scientists at Rush Alzheimer's Disease Center found that more frequent participation in cognitively stimulating activities is associated with a reduced risk of Alzheimer's disease. The research showed a 33% reduction in risk for each one-point increase in cognitive activity.
Researchers found that mice fed a folate-deficient diet developed severe Parkinson-like symptoms, while those with adequate amounts of the vitamin protected their brain cells from damage. Folate deficiency may contribute to increased toxin-induced damage to dopamine-producing neurons.
A study published in Neurology found that cognitive impairment No Dementia (CIND) affects 23.4% of community-dwelling participants aged 65 and older, with rates increasing by 10% for every 10 years after age 65.
A randomized study found that a moderate exercise program improved stress-induced blood pressure levels and sleep quality in older caregivers. The program, which included four 30-minute aerobic exercise sessions per week, showed significant benefits compared to nutrition counseling.
The ADCS has expanded its clinical trials to test new therapies for Alzheimer's disease, including a cholesterol-lowering statin drug, an antioxidant, and a high-dose vitamin regimen. The trials aim to slow the progression of cognitive decline in people with AD.
A new drug breaks down collagen bonds in blood vessels, reducing stiffness in older individuals. This could be a treatment for high blood pressure, heart failure, and diabetes complications.
A new double transgenic mouse model has been developed to study Alzheimer's disease, featuring both brain plaques and tangles associated with the condition. The model is expected to contribute significantly to knowledge about the course of the disease and aid in further development and testing of potential therapies.
Researchers have identified a genetic mutation, FOXL2, responsible for early onset of menopause in some women, who may also be born with blepharophimosis. The discovery sheds light on the role of genetics in age-related changes and may lead to new insights into aging and reproductive health.
A novel drug ALT-711 snips vascular collagen bonds, improving flexibility and reducing systolic blood pressure in older non-human primates. The treatment also increased blood flow through the heart, with effects persisting for over a year after administration.
Researchers have discovered a potential genetic risk factor for late-onset Alzheimer's disease on chromosome 10, linked to amyloid protein processing. The findings suggest that more than one gene may contribute to the development of late-onset AD, offering new hope for diagnosis and treatment.
A single gene mutation extends fruitfly lifespan by doubling it from 37 days to 69-71 days while maintaining high functioning and fertility. The Indy gene is associated with altered metabolism and energy utilization, pointing to potential benefits for human lifespan through genetic modification.
A low dose of estrogen was as effective as a higher dose in reducing bone turnover and preventing osteoporosis in older women. The study found that women taking 0.25 mg estradiol had no more side effects than those taking a placebo, improving bone health with fewer risks.
Researchers analyzed medical records of World War II veterans with head injuries and found a link between early adulthood trauma and later-life Alzheimer's disease. The more severe the injury, the greater the risk of developing AD, with those with severe injuries having a four-fold greater risk.
Researchers found that 19 out of 47 people with mild cognitive impairment who had difficulty identifying smells went on to develop Alzheimer's disease. The study suggests that the inability to recognize smells, combined with a lack of awareness about impaired olfactory senses, may be used as a predictor of impending Alzheimer's disease.
A new federal report highlights the growing older population's improved well-being, with many experiencing better health and socioeconomic status. However, significant disparities persist in disability, chronic health conditions, and economic stress among certain groups, including minorities and low-income elderly.
A study found that over half of medication-related injuries in US nursing homes are preventable, with psychoactive drugs and anticoagulants being the most common culprits. The study recommends enhanced surveillance, educational efforts, and systems-based prevention strategies to improve medication safety.
A new mortality forecast suggests that life expectancy in G-7 industrialized nations may be greater than previously thought, with Japan expected to live up to 8 years longer than official estimates predict. This could lead to a higher dependency ratio, requiring re-examination of programs for old-age support.
Researchers found that telomerase blocks a biochemical cascade of reactions called apoptosis, which causes nerve cell self-destruction. High levels of telomerase display remarkable resistance to damage or death in experimental models of Alzheimer's disease or stroke.
Scientists have created a genetically-engineered mouse model with human tau genes, allowing for the study of tau-containing lesions in various brain disorders. The new model shows abnormal tau filaments accumulating in nerve cells, similar to those found in Alzheimer's disease.
A new study published in the American Journal of Medicine challenges the notion that melatonin levels decline with age. Researchers found that healthy older adults' nighttime melatonin levels were similar to those of younger men, contradicting popular advertising claims. The study suggests that aging does not affect melatonin regulatio...
A new research study found that animals fed a blueberry extract diet showed fewer age-related motor changes and outperformed their counterparts on memory tests. The antioxidants in blueberries may help protect the body against oxidative stress, a process implicated in aging and neurodegenerative diseases.
A study led by Charles A. Czeisler found that healthy older adults tend to wake up earlier due to restricted sleep hours relative to their circadian period, similar to younger individuals. The study suggests that age does not inherently shorten the human circadian period.
A novel gene, BRI, located on chromosome 13 has been identified as responsible for familial British dementia, a rare inherited disease that causes progressive dementia and spasticity. The discovery provides new clues to the abnormal changes in the brain that lead to dementia.
The number of centenarians in the US is growing rapidly, with projections suggesting a doubling trend. The population is expected to become more diverse, with significant increases in Hispanic and Asian populations.
A study of over 1,000 older, disabled women reveals that nearly two-thirds report significant pain in multiple areas, yet many use inadequate or ineffective doses of medication. This mismatch suggests a need for better pain management strategies among older adults.
A study published in the Journal of the American Medical Association found that underlying vitamin D deficiency in post-menopausal women is associated with an increased risk of hip fracture. The researchers discovered that 50% of women with osteoporosis who suffered a hip fracture had previously undetected vitamin D deficiency.
Researchers discovered that a mutant form of the presenilin-1 protein causes a significant reduction in amyloid formation. The study provides insight into the interaction between two key molecules involved in amyloid formation, which may lead to advances in therapeutics research.