Articles tagged with Amyloids
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A study found that disrupting one night of sleep in healthy adults causes an increase in amyloid beta, a brain protein associated with Alzheimer's disease. A week of poor sleep also leads to an increase in tau protein, which has been linked to brain damage in Alzheimer's and other neurological diseases.
A human enzyme, cyclophilin 40, unravels protein aggregates contributing to Alzheimer's and Parkinson's diseases. Experimental expression preserves brain neurons and rescues cognitive deficits in a mouse model.
Researchers discovered that semen amyloids help dispose of excess and defective sperm, facilitating immune cell removal and quality control. This process may favor the survival of fittest sperm and contribute to successful reproduction.
Researchers have developed systems-pharmacological modeling to analyze and predict the dynamics of new drugs for Alzheimer's disease. The models can accurately match cerebrospinal fluid analysis results with brain processes, allowing for optimal drug administration and therapy selection.
Researchers from VIB lab discovered functional amyloids formed by bacteria with dedicated biological functions, differing from toxic pathological amyloids. They developed a novel microscopy method to study real-time growth and regulatory characteristics of these fibers.
A new study found that increased amyloid plaque buildup in the brain predicts faster cognitive decline in middle-age adults over four years. The research used PET scans to detect amyloid deposits in 184 healthy middle-age and older adults, revealing a link between higher amyloid amounts and vocabulary decline.
A study of cognitively normal individuals found that those with elevated brain amyloid levels were more likely to experience cognitive decline over a median of 3.1 years. The research suggests that preclinical Alzheimer's disease may represent the pre-symptomatic stage of AD.
A study published in The Journal of the American Medical Association found that elevated brain amyloid plaques are an early precursor to Alzheimer's disease, which can lead to faster mental decline. The research suggests that intervening against amyloid levels could slow or even stop the onset of the disease.
Researchers analyzed BACE_1, a critical enzyme in Alzheimer's disease, and proposed modifications to increase inhibitor bioavailability. Novel nanoparticle techniques are also being explored to destroy amyloid plaques, offering new hope for AD treatment.
Researchers found that low levels of the 'memory protein' NPTX2 are associated with reduced levels of cognition and memory loss in Alzheimer's disease. The study suggests that the combination of low NPTX2 and amyloid plaques disrupts neural activity, leading to cognitive failure.
Tramiprosate acts to inhibit the production of neurotoxic beta amyloid oligomers by enveloping the amyloid peptide to prevent its misfolding. This novel mechanism prevents the self-assembly of misfolded proteins into beta amyloid oligomers, leading to neuronal toxicity and clinical progression in Alzheimer's disease.
Researchers are testing an anti-amyloid drug on people with elevated amyloid levels but no cognitive decline. The goal is to identify an early stage of the disease and delay onset by five years by 2025, which could save billions in healthcare costs.
Researchers identify Ephexin5 as a key regulator of brain cell connections in Alzheimer's disease, finding that removing the protein prevents deficits in animal models. By targeting Ephexin5, drugs may be developed to prevent or treat symptoms of the disorder.
Researchers discovered that thin parts of neuronal membranes are vulnerable to amyloid-beta protein, which builds up in Alzheimer's disease. The study found that thinner membrane fragments allow plaque to penetrate the cell, leading to cell death and memory loss.
Researchers at Duke University identified a mechanism linking 'jumping genes' to brain cell death in Alzheimer's, potentially leading to new treatments. The study suggests that Alu elements, normally held in check by DNA methylation patterns, can disrupt mitochondrial function and contribute to neurodegeneration.
Researchers at UNIST developed a metal-based substance that hydrolyzes amyloid-β proteins, reducing their toxicity. The cobalt-based complex has the potential to penetrate the brain-vascular barrier and directly interact with the protein in the brain.
A UAlberta study found that AC253 improves memory and learning in mice with Alzheimer's-like symptoms, reducing amyloid levels and inflammation in the brain. Further studies are needed to optimize dosage and effectiveness.
A new technique can precisely measure individual protein molecules in blood and body fluids, providing valuable information on neurodegenerative diseases. The 5-D fingerprint analysis uncovers unique characteristics of misshapen proteins that contribute to disease progression.
A new tissue culture system has revealed that microglia from aged brains are engulfing amyloid plaques on site, with young microglia secreting factors to rejuvenate older cells. The discovery highlights a potential strategy for removing amyloid plaques and improving cognition in Alzheimer's disease.
Researchers from the University of Pennsylvania have identified a key player in causing neuronal damage linked to HIV treatment: the enzyme BACE1. Inhibiting this enzyme may offer a new approach to minimizing damage to neurons in patients on antiretroviral therapies.
Researchers have identified networks of changing proteins specific to Alzheimer's disease, highlighting the importance of inflammation and microglia. By analyzing post-mortem brain proteins, they uncovered patterns pointing to glial cell involvement in the disease's pathogenesis.
Researchers at MIT have developed a noninvasive technique using LED lights to reduce beta amyloid plaques in mouse models of Alzheimer's disease. The treatment induces gamma oscillations, which suppress beta amyloid production and invigorate cells responsible for destroying the plaques.
Researchers identified a protein called kinase p38γ that assists protective phosphorylation of tau and interferes with amyloid-beta toxicity. Introducing the protein into mice brains prevented memory deficits associated with Alzheimer's disease.
A new technology platform has been developed to target cancer by inhibiting a well-validated cancer driver through amyloid formation. This approach could lead to the development of novel medicines for a wide array of diseases.
Researchers suggest shifting from 'curing' Alzheimer's to building resilience, acknowledging the disease is intertwined with aging processes. They propose education, infrastructure support and proper care as key components of societal response.
Scientists developed two types of llama antibody that can specifically mark and show amyloid plaques and neurofibrillary tangles, the characteristic lesions of Alzheimer's disease. These antibodies have the rare ability to cross the blood-brain barrier, allowing for non-invasive detection.
Researchers developed a new chemical compound Fluselenamyl that detects amyloid clumps better than current FDA-approved compounds. It potentially could be used in brain scans to identify early-stage Alzheimer's disease or monitor response to treatment.
Higher cortical amyloid levels associated with greater loneliness, particularly in APOE4 carriers. Participants with higher amyloid levels were 7.5 times more likely to be classified as lonely than non-lonely individuals.
The Phase 3 analyses of tramiprosate in patients with Mild to Moderate Alzheimer's disease show a gene-dose effect, with the largest clinical benefit seen in patients who are APOE4/4 homozygotes. These results suggest that tramiprosate could be an effective treatment for patients with this genetic risk factor.
A team of scientists identified how amyloid beta, associated with Alzheimer's, can induce cellular changes leading to Parkinson's. This discovery may provide an explanation for the co-occurrence of these neurodegenerative conditions and help researchers find ways to prevent such cases.
Researchers have prevented the development of Alzheimer's disease in mice by using a virus to deliver a specific gene, PGC-1 - alpha, into the brain. The study opens avenues for potential new treatments for the disease and suggests that injections of the gene may be beneficial in the early stages of the disease.
Researchers found that exposure to bacterial proteins can cause brain proteins to misfold and lead to inflammation in the brain. The study suggests that gut bacteria may play a role in initiating these diseases, potentially leading to new treatments.
Researchers at ETH Zurich successfully assembled protein-like structures from four simple amino acids, suggesting that these molecules may have been the precursors of life. The findings support the 'amyloid hypothesis,' which proposes that ancient RNA molecules were not capable of self-replication.
Rice University scientists use computer simulations to model the energy landscape of amyloid beta protein aggregation, a key step in Alzheimer's disease progression. The research predicts that specific sequences on protein molecules interact to form toxic oligomers.
Researchers at Hokkaido University have created a versatile method to pattern functionalized nanowires using structure-controllable amyloid peptides. The technique achieved a 67% tandem yield and showed geometrical patterns that can be controlled by adjusting the peptide mix ratio.
Researchers have found that p53 is more prone to aggregation than its cousins due to exposed backbone hydrogen bonds. This instability can lead to the formation of amyloid fibrils, which are associated with various cancers. The study provides new insights into p53 stability and offers potential strategies for developing cancer therapies.
Aducanumab, a human monoclonal antibody, selectively binds to brain amyloid plaques, allowing microglial cells to remove them. After one-year treatment, almost complete clearance of brain amyloid plaques was observed in patients.
Scientists have identified the β2 subunit of nicotinic receptors as a direct target of soluble amyloid beta peptide, which builds up in the brain and leads to Alzheimer's disease. Blocking this receptor prevents memory loss and cognitive decline in mouse models.
Scientists at the Medical College of Georgia have found that vesicles that trap amyloid contribute to Alzheimer's disease. Reducing exosome production may help reduce amyloid accumulation and slow disease progression. However, female mice did not reap similar benefits, suggesting potential gender-specific differences in the disease.
New research boosts levels of neuregulin-1 to alleviate hallmark features of Alzheimer's disease in a mouse model, promoting metabolism of brain plaques. The study suggests that neuregulin-1 may improve performance on spatial memory tests and lower cellular markers of disease.
Researchers at Georgetown University Medical Center have found that cancer drug pazopanib decreases levels of phosphorylated Tau, a toxic brain protein linked to dementia in Alzheimer's and Parkinson's diseases. The study suggests that tau pathology may be the main culprit behind dementia in Alzheimer's disease.
Scientists at University of Sussex have created a new protein resembling Abeta, which doesn't form clumps and is not toxic. This new tool will help researchers understand the causes of Alzheimer's disease and potentially find a cure.
Researchers have identified a link between the TREM2 gene and immune cell dysfunction in Alzheimer's disease. Studies found that variants of this gene can impair the brain's ability to clear amyloid-beta aggregates, a hallmark of the disease.
A new molecule, rhenium dipyridophenazine complex, has been discovered that glows brighter when bound to amyloid protein fibrils implicated in Alzheimer's disease. This enables real-time monitoring of plaque aggregation, a key step in the development of potential treatments.
Researchers found that THC and other cannabinoids reduce amyloid beta protein levels and eliminate inflammatory responses in brain cells. This study may provide insights into developing novel therapeutics for Alzheimer's disease.
A new PET study reveals that tau protein tangles in the brain may be driving the neurodegeneration behind Alzheimer's disease. The research found a significant correlation between increased tau and decreased metabolic activity in the brain, suggesting that tau imaging could be used to detect neuronal injury earlier than amyloid imaging.
A new study reveals that altering the amyloid beta protein by changing one amino acid creates an intermediate form with enhanced toxicity. This discovery provides a promising tool for investigating the neurotoxic effects of amyloid beta oligomers and could lead to new targets for drug development efforts.
A study suggests that amyloid-ß peptide can ensnare invading microbes, halting infection in mouse and worm models of Alzheimer's disease. Researchers also found that mice with overexpressed amyloid-ß showed greater resistance to bacterial infection.
Researchers have developed a new method for detecting and diagnosing preclinical Alzheimer's disease using PET imaging with PiB, which binds to amyloid plaques in the brain. The study found that PiB retention was prominent in cortical areas of the brain, consistent with post-mortem studies of Aβ plaques.
Researchers at WashU Medicine have developed a new imaging agent that better predicts Alzheimer's disease progression than amyloid beta. The study found elevated tau levels are associated with cognitive decline and predict symptoms of dementia.
Scientists have successfully enhanced reaction velocity constants for proteins turning into toxic substances by 1,000 times using ultrasonic irradiation. This breakthrough can be applied to early diagnosis and treatment of Alzheimer's disease.
Researchers have identified genetic variations in the PKC alpha enzyme that boost its activity and contribute to the development of Alzheimer's disease. These variants were found in five families with late-onset Alzheimer's disease and are associated with increased PKC alpha activity.
A USF professor is investigating the possibility that CTE can start when an on-field collision generates a 'seed' that spreads protein abnormality in the brain. Similar processes may be at work for Alzheimer's and Parkinson's diseases.
Researchers at McGill University find that the combination of amyloid and tau proteins causes brain damage in cognitively intact individuals, offering new insights into Alzheimer's disease progression. The study's findings suggest that therapeutic strategies targeting both proteins may be effective in preventing or stabilizing AD.
A team of scientists at Linköping University has developed a molecular probe for early detection of amyloidosis, a rare disease affecting less than 200,000 people in the US. The probe detects small amyloid deposits that traditional methods miss, enabling earlier diagnosis and more effective treatment.
A team of researchers at UMass Amherst and Virginia Tech have identified the factors governing the final morphology of self-assembling chiral filament bundles. Their new model predicts the size and shape of these structures based on molecular-scale interactions, providing insights into protein fiber formation in various tissues.
The novel blood test detects misfolded Amyloid beta peptides in body fluids, revealing potential for early detection of Alzheimer's. The test has achieved high diagnostic precision with a sensitivity of up to 90% and is being further optimized in ongoing studies.
Researchers have discovered that amyloid protein build-up is greater on the left side of the brain, where language processing occurs, in individuals with primary progressive aphasia (PPA). This study provides new insights into the disease process and offers hope for early diagnosis and treatment.
A new study from Lund University reveals that the accumulation of amyloid beta in the brain may be caused by both overproduction and problems with breaking down the protein. The research suggests that Alzheimer's disease may be a more heterogeneous condition than previously thought, with potential implications for future treatments.
Researchers used PET scans to study the progressive stages of Alzheimer's disease in cognitively normal adults, tracking tau protein accumulation in the brain. The findings suggest that tau imaging could become an important tool in developing therapeutic approaches targeting either amyloid or tau, depending on the disease stage.