Articles tagged with Prions
Researchers tested genetic resistance in sheep and found PrP absorption is not blocked by gut, but rather by villi. The study suggests alternative mechanisms may exist, leading scientists to reconsider the prion hypothesis for vCJD.
Researchers discovered that the normal form of mad cow protein promotes neurogenesis by helping precursor cells differentiate into mature neurons. The study found that increased levels of PrP accelerate neuron production, while decreased levels slow it down.
Scientists have developed a new method to catalogue and examine the differences between individual cases of prion diseases. Applying this assay to 50 postmortem samples from patients with sCJD reveals substantial differences in molecular pathology, which could help understand this mysterious disease.
A recent NIH study found a strong association between progressive aphasia syndrome and a specific prion gene variant, suggesting that the disease may be linked to genetic variations in the prion protein. The findings have significant implications for understanding the causes of this rare neurological disorder.
A new study by University of Wisconsin-Madison researchers found that white-tailed deer in the chronic wasting disease (CWD) zone use very small home ranges, typically half a square mile in size. This suggests that deer may not be spreading CWD through long-distance travel, contradicting previous assumptions.
A recent study published in Science demonstrates a new and sensitive assay for infecting prion diseases, including CJD and scrapie. The research shows that persistent replication of the infectious agent provides protection against more virulent strains, without requiring misfolded prions.
Researchers have identified the PrPC protein as a crucial component in the neuronal metabolism of calcium, shedding new light on the cause of mad cow disease. The study found that prions damage perineuronal nests, leading to neuronal death and disease progression.
A new study found that red blood cells filtered through the Pall Leukotrap Affinity Prion Reduction Filter System retain their therapeutic value and quality after 42 days of storage, exceeding FDA requirements. The filter demonstrated a 99.9% reduction of prions, including sporadic CJD, scrapie, and mouse-adapted human vCJD.
Researchers discovered that prions can rapidly 'remodel' good protein into bad, shedding important light on the molecular machinery behind infectious brain diseases. This process may also help explain the progression of Alzheimer's, Parkinson's and Huntington's diseases.
Researchers found that small prions are significantly more infectious than large ones, yet there is a lower size limit beyond which infectivity is lost. The study's findings suggest that treatments targeting large prion deposits may do more harm than good by releasing the most infectious particles.
Scientists successfully detected mad cow proteins in the blood of infected hamsters using a novel method called protein misfolding cyclic amplification (PMCA). The breakthrough could lead to a more effective test for detecting prions in cattle and human blood, reducing the risk of transmission through food and organ transplants.
A new study confirms the filter's effectiveness in reducing prions by up to 99.9%, providing a critical safety measure against vCJD transmission through blood transfusion. The technology has the potential to safeguard the global blood supply and prevent future outbreaks.
Scientists at the Salk Institute have discovered that a specific conformation of the prion protein is the infectious entity behind deadly prion diseases. By altering this shape, researchers may find a strategy to control these untreatable brain-wasting diseases.
Researchers have gained a detailed understanding of the interconnected protein segments that form amyloid fibrils, a key feature in various diseases. The structure reveals a 'spine' made up of short zippers that are tightly bonded together.
Scientists have found a way to analyze the configuration of amyloid fibers using yeast strains, providing insights into how prions interact with each other. The study reveals that prions have only two points of contact, known as the 'head' and 'tail,' which determine their interactions.
Research suggests that a variant form of abnormal prion protein lacking an anchor may be unable to signal cells to start the lethal disease process, leading to infection without symptoms. The study provides novel insights into how prion and other neurodegenerative diseases develop and hints at new approaches to prevent such diseases.
Researchers have watched infectious prion proteins invade and move within brain cells, shedding light on transmissible spongiform encephalopathies (TSE) diseases. The findings may lead to ways to prevent or minimize their effects.
Researchers at NYU Langone Health have developed the first mucosal prion vaccine that protects mice from developing prion disease by up to 500 days. The vaccine uses proteins found on disease-causing organisms and has shown promising results in preventing the progression of prion diseases.
Researchers at UTMB developed a method called PMCA to produce infectious prions in test tubes, causing TSE symptoms in healthy hamsters. The breakthrough confirms the prion hypothesis and opens doors for new surveillance techniques and blood tests for mad cow disease.
Researchers find specific shapes of amyloid fibrils, not amino acid sequences, determine prion infectivity across species. This breakthrough offers insights into the mechanisms behind prion diseases and potential transmission between previously separate animals.
A new diagnostic technique, conformation-dependent immunoassay (CDI), is being considered as the standard approach for brain biopsies of patients suspected of having prion disease. The study found that CDI detected prions in 100% of samples studied, while traditional tests failed to detect them in a high proportion of cases.
Researchers developed a conformation-dependent immunoassay (CDI) that detects prions in human brain tissue, outperforming standard immunological methods. CDI detected abnormal prions in all sampled brain regions, suggesting its potential for accurate diagnosis of prion diseases like CJD.
The Pall Leukotrap Affinity Prion Reduction Filter reduces leukocytes and prions by 99%, making it effective against vCJD. The filter also preserves red cells without compromising their efficacy or purity.
A study published in Science found that prions, the infectious agents behind mad cow disease, can accumulate in organs such as the liver and pancreas in animals with chronic inflammation. The discovery suggests that the current risk classification for farm animal organs may need to be reassessed in animals suffering from inflammation.
Scientists studying prion diseases in mice found that preventing cell death does not stop the progression of neurological symptoms. Damage to synapses, critical for nerve cell communication, is instead linked to the disease.
Researchers found that infectious prions can survive digestive juices and cross the human intestinal barrier by linking with ferritin, an iron-storing protein. This breakthrough discovery provides insight into the mechanisms of prion transmission and may lead to the development of methods to block prion uptake.
A study found that the Pall Leukotrap Affinity Prion Reduction Filter reduces infectious vCJD prions in red blood cell concentrates below detection limits. The filter also reduced scrapie prions, a similar TSE, from blood, with no clinical symptoms reported in animals treated with filtered blood.
Experts warn of a potential second wave of vCJD infections due to increased cases in France and the UK. The panel discussion highlighted the need for enhanced safety measures to prevent human-to-human transmission of this fatal neurodegenerative disease.
Researchers screened 2000 anonymous surgical tonsillectomy specimens for the presence of rogue prion protein causing vCJD. No positive cases were identified, but a national large-scale prospective prevalence study is necessary to determine true community infection rates.
Amyloid fibers assemble individually through the addition of monomers, contradicting earlier theories that suggested oligomeric globules played a key role in their formation. This finding has significant implications for understanding amyloid diseases such as Alzheimer's and Parkinson's.
A team of researchers discovered that prions can have a beneficial effect on the evolution of yeast cells, allowing them to survive in new environments. This occurs when prions alter the reading of genetic information, leading to changes in the cell's phenotype.
The study identifies a heterozygous genotype for the prion protein, suggesting that individuals with this genetic subgroup may be at higher risk of vCJD transmission. The findings highlight the need for continued surveillance and leucoreduction policies to reduce the risk of blood-borne transmission.
Researchers at NIH/National Institute on Aging created synthetic prions that caused neurological disease in mice, distinct from other strains of prions. The study sheds light on the conversion process leading to dementing diseases like Creutzfeldt-Jakob and Alzheimer's.
Scientists at UCSF created a large fragment of the normal prion protein, which they then folded into an abnormal shape to induce infection. The study demonstrates that misfolding a particular segment of the normal prion protein is sufficient to transform it into infectious prions. This finding provides new insights into spontaneous pri...
Researchers estimate around 3,800 individuals in the UK could be incubating vCJD, based on three positive samples and calculations. However, the significance of two other samples with different prion protein accumulation patterns is uncertain.
Oral exposure to scrapie has been shown to lead to the deposition of pathological prion protein PrPSc in hamster muscles. This preclinical study provides new insights into the progression of prion diseases.
A new study by researchers at Case Western Reserve University has found that an abnormal form of the prion protein from one mammal species can infect another species, bypassing natural barriers. This discovery sheds light on the mechanisms behind prion diseases like mad cow disease and Creutzfeldt-Jakob disease.
Scientists have identified amino acid sequences that allow prions to aggregate and replicate, leading to the creation of an artificial yeast prion. This breakthrough sheds light on the mechanisms behind diseases like mad cow disease and Alzheimer's, potentially paving the way for new treatments.
Researchers establish that different strains of prions can be accounted for by misfolded conformations of the same protein. The study provides insights into how amyloid proteins form and propagate, potentially guiding future studies of strain properties in mammalian prions.
Researchers isolate three strains of yeast prions that transmit life-changing information in yeast cells without DNA or RNA. These protein-only particles act like genes, disrupting normal cell function and leading to the formation of amyloid plaques associated with neurological disorders.
Researchers confirm that shape change accounts for strain differences in prions, laying groundwork for strategies to block disease. Prion shape underlies ability to jump between species, according to new finding.
A UK-based study found that individuals who received blood components from donors later diagnosed with vCJD were at increased risk. Researchers also discovered that the BSE agent can be transmitted through intravenous routes, highlighting concerns for possible transfusion cases.
Researchers at Scripps Research Institute find normal cellular prion protein essential for prion diseases like BSE, and inducing neurotoxicity without scrapie prions triggers catastrophic outcomes. This discovery highlights the complexity of prion pathogenesis and challenges existing therapeutic approaches.
Scientists are working to create an animal that lacks the genomic architecture to code for normal prions, which cause Bovine Spongiform Encephalopathy (BSE) and Creutzfeldt-Jacob Disease. The goal is to produce a cow that is genetically incapable of producing prions, which could potentially contain the risks of this disease.
A bacterial enzyme keratinase has been found to fully degrade transmissible prions responsible for bovine spongiform encephalopathy and other diseases. Researchers plan to test its effectiveness in mice to confirm non-infectious levels of prion after degrading it to undetectable levels in vitro.
Researchers discover protein CPEB uses prion properties to strengthen synaptic connections, enabling long-term memory storage. The finding challenges traditional views of prions as toxic and suggests they may play a key role in fundamental processes.
A Fox Chase Cancer Center researcher has developed a new model for studying prions, which are misfolded proteins responsible for diseases such as BSE and Alzheimer's. The study aims to unravel the molecular basis of prion formation, which is crucial for developing treatments.
A study published in Molecular Psychiatry found that a specific gene variant, M129V, affecting the prion protein is associated with changes in cognitive performance. Researchers discovered this link while investigating genetic influences on mental health disorders, also noting a connection to mad cow disease.
A Dartmouth study has found that RNA molecules can catalyze the transformation of normal prion proteins into disease-causing counterparts, potentially leading to early detection and treatment of prion diseases. The discovery opens new avenues for exploration in diagnosis and treatment of neurodegenerative disorders.
Researchers at the University of Wisconsin-Madison have found that prions, infectious proteins linked to diseases like mad cow and scrapie, can stick to certain soil types. This suggests that the environment may play a role in the spread of these diseases.
Researchers have developed a new test, called conformation-dependent immunoassay (CDI), that can detect prion proteins with 100% accuracy at smaller levels than conventional tests. The CDI test can also be used to identify infected animals before they show symptoms, potentially ending the practice of slaughtering entire herds.
Studies with yeast prions show that small mutations can cause transmission barriers, potentially explaining species barriers for mammalian prions. The findings suggest a new approach to treating disorders like Alzheimer's by influencing toxic protein folding.
Scientists at the University of Toronto have made a breakthrough in understanding how to diagnose, treat, and potentially prevent infectious prion diseases like mad cow disease. By identifying specific amino acid sequences on abnormal prions, they were able to develop antibodies that can recognize and attack these rogue proteins.
Scientists have identified a novel step in the formation of prions, proteins that cause neurodegenerative diseases such as Creutzfeldt-Jakob disease and chronic wasting disease. By inhibiting this conversion with compounds blocking free sulfhydryl groups, researchers may be able to develop a therapeutic strategy against prion disease.
Scientists have found that combining high temperature and ultra-high pressure can reduce prions to non-infective levels, improving the safety of meat products. This approach may also provide insights into understanding prion structure.
Scientists have found evidence of pathological prion protein in the skeletal muscles of Syrian hamsters infected with scrapie. The discovery expands on previous findings and suggests that further research is needed to understand the presence of prions in muscle tissue.
A new study found that genes protecting against prion diseases, which can be spread through eating contaminated flesh, have long been widespread globally. The research suggests that prehistoric humans practiced cannibalism, leading to the spread of protective genetic variations.
Researchers have successfully created electrical wire using prions as a template, which can be coated with gold and silver particles to conduct electricity. This bottom-up approach could revolutionize the manufacturing of nanoscale microcircuits and machines.
Researchers at Imperial College London have established a 'proof of principle' that prion diseases might be prevented using monoclonal antibody therapy. The treatment, which involves administering antibodies to mice infected with scrapie prions, appears to delay the onset of clinical disease indefinitely.
Researchers have developed a highly sensitive automated test for detecting prions in cattle, sheep, deer, and elk, significantly improving the accuracy and speed of detection. The test, an immunological probe, uses novel antibodies to reveal and measure infectious abnormal prion protein.