Articles tagged with Alzheimer Disease
A study by Forsyth Institute researchers reveals a link between periodontal disease and amyloid plaque formation in the brain. Oral bacteria can travel to the brain, causing neuroinflammation and promoting cognitive decline in Alzheimer's patients.
A machine learning model developed by Duke Health researchers can differentiate normal cognition from mild cognitive impairment using retinal images from the eye. The model achieved a sensitivity of 79% and specificity of 83%, identifying specific features in OCT and OCTA images that signal cognitive impairment. This non-invasive metho...
Researchers discovered a novel peptide, T14, that is detectable in human keratinocytes and inversely related to age, with higher levels found in chronically photosensitive individuals. The study suggests that monitoring T14 levels may offer insights into the link between degenerative diseases and epidermal cell profiles.
ClearTau overcomes limitations of previous methods by producing Tau fibrils efficiently and consistently. This allows researchers to study the development of tauopathies and develop disease-specific therapeutics.
Researchers found that four weeks of resistance training with weights reversed behavioral and physical alterations characteristic of the disease in mice. The study's results suggest that physical activity can be an effective strategy to avoid or delay the appearance of symptoms of sporadic Alzheimer’s, which may be associated with aging.
A new study describes an engineered approach that makes protein aggregates amenable to spatial manipulations in both budding yeast and human cells. This system allows for the export of protein aggregates from cells, potentially protecting mother cells from toxicity and contributing to a better understanding of neurodegenerative diseases.
A large study suggests that higher levels of lean muscle mass may be associated with a reduced risk of Alzheimer's disease. The researchers used Mendelian randomisation to analyze the relationship between genetically proxied lean muscle mass and Alzheimer's disease risk, finding a modest but statistically robust association.
The expert panel's recommendations aim to improve early detection of mild cognitive impairment in primary care, benefiting patients and caregivers. The work group advocates for the routine use of brief cognitive assessments to identify patients in need of full cognitive examination.
A recent meta-analysis of 29 studies found that intranasal insulin treatment can boost cognition in individuals with mild cognitive impairment or Alzheimer's Disease. The analysis suggests potential benefits for this treatment approach, which may be worth further investigation.
Researchers developed a computational technique combining genomic and tau PET imaging data to identify four subtypes of Alzheimer's disease. The integrated approach also revealed top genes associated with each subtype. This personalized diagnostic technique has potential for broad utility across various diseases.
A new study examining brain tissue from 631 former football players found that the cumulative force of hits, not just the number of concussions, was the strongest predictor of chronic traumatic encephalopathy (CTE). The study suggests that reducing the force and frequency of head impacts could help prevent CTE in athletes.
Researchers used a stem cell model to study the effects of Alzheimer's disease-associated mutations on early human brain development, finding that mutant spheres were larger and contained fewer mature neurons. The study highlights the need for tailored therapies and paves the way for studying Alzheimer's in its early stages.
Researchers found that mice with Alzheimer's Disease lacked TLR4 in their central nervous system, leading to reduced joint inflammation and immune cell response. This study suggests potential therapeutic targets for chronic pain treatment and raises awareness about underreported pain in AD patients.
A new evidence-based framework proposes integrating palliative care into neurology teams to address the total pain of neurologic illness, including psychological, social, and spiritual distress. This approach aims to screen for and prevent suffering by incorporating a palliative care model from day one.
Researchers establish a direct link between Covid-19 and Alzheimer's disease, attributing the connection to RAS overactivation caused by SARS-CoV-2 virus. This dysfunction leads to increased b-amyloid protein accumulation, impairing brain cell synaptic connections and cognitive functions.
Researchers found that the amyloid precursor protein (APP) regulates human neurogenesis, which could be linked to Alzheimer's disease. APP promotes a balance between stem cell proliferation and differentiation, suggesting its disruption may cause premature neurogenesis and cellular stress.
Researchers found a significant correlation between vitreous humor biomarkers and pathologically confirmed cases of Alzheimer's disease and Chronic Traumatic Encephalopathy. Biomarkers in the vitreous humor may serve as a proxy for neuropathological disease, offering potential early diagnosis and prognostication.
A new AI-based technique measures brain fluid flow with unprecedented accuracy, revealing pressures and three-dimensional flow rates. This breakthrough could lead to the development of new treatments for Alzheimer's, small vessel disease, strokes, and traumatic brain injuries.
Researchers found that an older adult's performance on the phone menu test was associated with Alzheimer's disease pathology, including amyloid and tau depositions. The test detected clinically meaningful changes in daily functioning before pronounced symptoms of cognitive decline began.
Researchers found a distinct gut microbiome in people with pre-symptomatic Alzheimer's, differing from healthy individuals. This discovery opens the possibility of analyzing gut bacteria to identify risk factors and designing preventive treatments.
A team of researchers at IISc has designed a small molecular fluorogenic probe that can sense Acetylcholinesterase (AChE), an enzyme linked to the progression of Alzheimer's disease. The probe is designed to detect AChE levels in the early stages of the disease, which become imbalanced.
Researchers have created a 'meta-cell' that combines data from 50 similar cells, allowing them to study Alzheimer's disease without the limitations of single-cell genomics. This process reveals insights into microglia states and gene activity, which can be targeted for therapeutics.
Scientists at the Stowers Institute for Medical Research have uncovered the structure of the first step in amyloid formation for Huntington's disease. The team proposes a new method for treating not only Huntington's but potentially dozens of other amyloid-associated diseases by preventing the initial, rate-limiting step from occurring.
A study by Scripps Research and University of Bologna found that excessive alcohol consumption accelerates cognitive decline in genetically susceptible mice. Gene expression analysis revealed widespread changes indicative of disease progression, including increased neuronal excitability and neurodegeneration.
Researchers aim to understand how estrogen levels and menopausal status interact with memory-related brain function and behavioral outcomes in women aged 35-80. The study could help identify physiological factors underlying sex differences in Alzheimer's incidence and improve early disease detection and preventive therapies.
Researchers used machine learning to build predictive models for nine common diseases based on genetic information and blood biomarkers. Blood biomarkers provided better prediction in nearly all cases, especially for near-term risk, suggesting direct links between some measures and the pre-symptomatic phase of disease.
Researchers at Gladstone Institutes discovered that blood leaking into the brain triggers toxic genes in microglia, turning them into harmful cells that destroy neurons. Fibrin, a blood protein, is responsible for this process, which can lead to cognitive dysfunction and motor impairment.
Scientists at the University of Rochester Medical Center discovered a link between Alzheimer's disease and hearing loss in mice, finding that plaque location in the brain may contribute to hearing decline. The study suggests that tracking disease progression through amyloid PET imaging could be a potential biomarker for hearing loss.
Defective myelin promotes disease-related changes in Alzheimer's by accelerating amyloid plaque deposition and overwhelming immune cells. Slowing down age-related myelin damage could lead to new therapies and prevent or slow down the disease.
The study used transcranial photobiomodulation (tPBM) to stimulate the prefrontal cortex, a region involved in cognitive function. The results showed that tPBM modulated hemodynamic and metabolic activities in a wavelength- and site-specific manner.
Researchers found that women with higher-quality cardiovascular fat during midlife had stronger long-term memory and lower inflammation, while those with lower-quality fat had worsening working memory. The study suggests that taking care of heart health during menopause may protect brain health and reduce dementia risk.
Researchers found that targeted deep-brain stimulation during a critical sleep cycle improved memory consolidation in patients with epilepsy. The study provided physiological evidence from inside the human brain supporting the main theory for how memory is consolidated during sleep.
Researchers from Boston University identified several new genetic risk factors for Alzheimer's disease in a study of approximately 3,500 individuals of Ashkenazi Jewish ancestry. The study found strong associations with previously known variants and novel genes, including RAB3, SMAP2, and ZNF890P.
Researchers identified mRNAs and long non-coding RNAs targeted by stress granule proteins, which accumulate AD-associated gene transcripts in these structures. SGs may play a key role in regulating AD development through the impairment of protein neurohomeostasis.
A new study published in Neurology found an association between sleep apnea and reduced brain volume, particularly in the medial temporal lobe area of the brain. People with amyloid plaques who had more severe sleep apneas were also more likely to have lower brain volumes, suggesting loss of brain cells.
A new study in a mouse model of Alzheimer's disease examines the effects of environmental enrichment on AD symptom progression and pathology. The researchers found that living in an enriched environment improved several measures of metabolism and reduced individual behaviors, which became more similar and rigid as the disease progressed.
Researchers found that a combination of amyloid burden and blood markers of abnormal astrocyte activation can predict Alzheimer's disease progression. Testing for these biomarkers may help identify patients at risk, enabling earlier diagnosis and treatment.
A University of Maryland study found that walking strengthened brain connectivity and improved memory in older adults with normal brain function and those diagnosed with mild cognitive impairment. The research adds to the growing evidence that exercise slows cognitive decline and may delay Alzheimer's disease.
The Alzheimer's disease development pipeline has seen an increase in promising therapies and pharma investment, driving momentum in clinical trials. The pipeline currently has 187 clinical trials, with recent FDA approvals for two disease-modifying therapies, and more on the way.
Researchers at Brown University have developed a new imaging technique to track changes in blood vessels in the brains of mice, which could lead to early detection of neurodegenerative diseases. The method uses advanced imaging techniques and AI algorithms to identify biomarkers that may predict disease onset.
Researchers discovered a genetic variant protecting against Alzheimer's disease alters levels of proteins and peptides linked to amyloid-beta metabolism. The APP A673T variant demonstrates effectiveness in shifting APP processing from beta-amyloidogenic to non-amyloidogenic pathways, offering a new feasible strategy for AD prevention.
Researchers found that genetic predisposition to lipids, Alzheimer's, and heart disease in the MLXIPL gene locus is shaped by exogenous exposures. Minor alleles of certain variants associated with high triglyceride levels and lower HDL-C levels, which may provide protective effects against Alzheimer's risk.
A study published in Neurology found that people with Alzheimer's disease are more likely to develop epilepsy, and those with focal epilepsy are at a higher risk of developing Alzheimer's disease. The study also found a link between genetic variations and increased risk of epilepsy.
A new potential drug target has been identified for Alzheimer's disease by Rensselaer researchers, focusing on the interaction between ApoE and heparan sulfate. The study suggests that modulating this interaction could slow the progression of the disease.
A UCI-led study reveals that the oldest-old, those living up to 90 years old, exhibit similar levels of brain pathology as Alzheimer's patients but with lower levels of pathology from other neurodegenerative diseases. This finding suggests these individuals may be resistant to these age-related cognitive decline.
Researchers found that apoE4 poorly binds factor H, a regulatory factor of immunity, leading to amyloid-β oligomerization and neuroinflammation. This could be a potential solution to preventing Alzheimer's disease, with further research needed to find a bridging molecule.
A new study reveals that increased sugar intake and elevated blood glucose levels can cause amyloid plaque buildup in the brain, increasing the risk of Alzheimer's disease. Researchers identified a metabolic sensor on neurons linked to this process, suggesting potential therapeutic benefits for diabetic patients.
Researchers used a machine-learning method to identify sex-specific genes and molecular pathways contributing to Alzheimer's disease progression. The study found that females experience faster cognitive decline, while males have greater mortality rates.
Researchers at Massachusetts General Hospital found that treatment with the BCG vaccine was associated with a 20% lower risk of Alzheimer's disease and related dementias. The protective association was greater in patients aged 70 years or older.
A new study by MIT scientists shows that 40 Hz vibration can reduce levels of the hallmark Alzheimer's protein phosphorylated tau, preserve neurons, and improve motor function in mouse models. This research demonstrates a third sensory modality to increase gamma power in the brain, offering new hope for Alzheimer's treatment.
Researchers identified novel genetic associations between AD and modifiable risk factors, including high HDL cholesterol concentrations and systolic blood pressure. These findings may inspire new drug targets and improved prevention strategies for AD.
A recent study found that a unique subset of microglia, ARG1+, plays a crucial role in cognitive functions and development. This discovery could lead to new therapeutic approaches for Alzheimer's disease, schizophrenia, and depression. Female animals exhibited more pronounced behavioral impairments caused by ARG1 microglial deficiency.
Researchers at the University of Arizona College of Medicine – Tucson used AI to map molecular changes in healthy brain cells and identify upstream genetic points that trigger Alzheimer's disease. The study provides clues to the disease's origins and potential drug targets.
Researchers discovered a new genetic variant in the Reelin gene that provides protection from Alzheimer's disease. The variant was identified through clinical assessments, genetic and molecular studies, and neuropathological analysis of two patients with a similar genetic predisposition to developing early-onset Alzheimer's disease.
Researchers have discovered that toxic proteins, known as tau oligomers, are transported through synapses and contribute to the decline in brain function. The study found small clumps of tau oligomers inside synapses, which can spread through the brain and lead to neuron death.
A team of researchers discovered a new mutation, E674Q, in the APP gene associated with late-onset Alzheimer's disease. The study found that this mutation leads to increased production of toxic amyloid beta protein, contributing to AD progression.
Researchers at UC Irvine found that exposure to traffic-related air pollution increased the risk of Alzheimer's disease in mouse models. The study showed that particulate matter impaired memory tasks and cognitive function, leading to brain plaque build-up and glial cell activation, key indicators of Alzheimer's disease.
Researchers at Brigham and Women's Hospital have characterized the structure of amyloid-beta fibrils in the human brain, revealing their role in Alzheimer's disease progression. The study sheds light on how lecanemab, a US FDA-approved drug, exerts its protective effects by targeting these fibrils.
A team of researchers identified the substrates targeted by alpha 2-macroglobulin for degradation. They developed a novel assay to detect its role in lysosomal degradation of extracellular proteins. This finding suggests that an array of extracellular chaperones cooperate to protect against misfolded proteins.
Research from Japan reveals higher risk of depression and anxiety among older adults with dementia and poor activity participation during the pandemic. Poor activity participation was also associated with high risk of depressive symptoms and anxiety.