Understanding Hookworms in Dogs – American Kennel Club
Tau PET: A Window Into The Future Of Alzheimer's Patients
Alzheimer's disease, one of the most common neurodegenerative diseases, leads to progressive loss of memory and autonomy. It is characterized by the accumulation of neurotoxic proteins in the brain, namely amyloid plaques and tau tangles. Due to the silent development of pathology over decades, very early diagnosis is of utmost importance to be able to take action as early as possible in the disease process.
A team from the University of Geneva (UNIGE) and the Geneva University Hospitals (HUG) has demonstrated that tau PET—a novel imaging technique for visualizing the tau protein—can predict cognitive decline in patients much better than the imaging techniques normally used.
These results, published in Alzheimer's & Dementia, argue in favor of the rapid introduction of tau PET into the clinical routine to provide patients with early and individualized solutions.
Today, one of the main diagnostic tools for Alzheimer's disease is positron emission tomography (PET), an imaging technique in which tracers are injected to visualize specific pathological processes in the brain.
"PET involves injecting patients with low-level radioactive tracers that disappear within a few hours. They are designed to bind to the human molecules that we want to detect, making them visible with the PET tomographs," explains Valentina Garibotto, Associate Professor in the Department of Radiology and Medical Informatics at UNIGE Faculty of Medicine and Head Physician in the Division of Nuclear Medicine and Molecular Imaging at the HUG, who directed this research.
"Specific tracers for amyloid exist since two decades, and tracers to monitor glucose metabolism, which indicates the brain's ability to use its energy resources correctly, have long existed. However, Alzheimer's disease is complex and these two techniques are not enough to provide all the answers."
Comparing imaging techniquesFlortaucipir is a radiotracer that binds to the tau protein. It was developed by a pharmaceutical company and approved by the Food and Drug Administration (FDA) in 2020. It allows the detection of tau accumulation as well as its distribution in the brain to precisely assess its role in the clinical manifestation of the disease.
Scientists from the UNIGE and the HUG wanted to determine which imaging modality—amyloid PET, glucose metabolism PET, or tau PET—would best predict future cognitive decline due to Alzheimer's disease. Around 90 participants were recruited at the HUG Memory Center.
"Our results show that while the various PET measures were all associated with the presence of cognitive symptoms, confirming their role as strong indicators of Alzheimer's disease, tau PET was the best to predict the rate of cognitive decline, even in individuals with minimal symptoms," summarizes Cecilia Boccalini, a Ph.D. Student in Professor Garibotto's team and first author of this study.
Detecting individual variationsAmyloid plaques are not necessarily accompanied by cognitive or memory loss. However, the presence of tau goes hand in hand with clinical symptoms. Its absence or presence is the main determinant of whether a patient's condition remains stable or deteriorates rapidly. It has been more difficult to develop imaging techniques to visualize tau, mainly because of its lower concentration and particularly complex structure.
"This breakthrough is crucial for better management of Alzheimer's disease. Recently, drugs targeting amyloid have shown positive results. New drugs targeting the tau protein also look promising. By detecting the pathology as early as possible, before the brain is further damaged, and thanks to new treatments, we hope to be able to make a greater impact on patients' future and quality of life," Valentina Garibotto points out.
"Similarly, we are beginning to map the distribution of tau in order to understand how its location in the different regions of the brain influences symptoms." Indeed, the causes and different stages of the disease are proving to be much less uniform than previously thought, and individual susceptibility to the same phenomena needs to be better understood.
These results are a strong argument in favor of incorporating tau PET into the routine clinical evaluation to assess individual prognosis and select the most appropriate therapeutic strategy for each patient.
More information: The impact of tau deposition and hypometabolism on cognitive impairment and longitudinal cognitive decline, Alzheimer s & Dementia (2023). DOI: 10.1002/alz.13355
Citation: Tau PET: A window into the future of Alzheimer's patients (2023, August 9) retrieved 9 August 2023 from https://medicalxpress.Com/news/2023-08-tau-pet-window-future-alzheimer.Html
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Pet Pain Management Drugs Market Analysis, Share, Size, Recent Trends And Demand And Forecast 2029
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TOC Continued...!
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Unwanted Medications Being Collected In Cayuga County
Officials hope the public takes advantage of an opportunity to drop off unused, expired or unwanted prescription drugs in Auburn so they can be safely disposed of.
A collection and drug awareness event has been scheduled for 4 to 6 p.M. Tuesday, Aug. 29, at Elks Lodge No. 474, 314 State St., Auburn.
The drop-off is for prescription tablets, capsules, patches and ointments in addition to over-the-counter medications, pet medications, samples and vitamins.
Needles and other sharps will not be accepted.
Prescription medications in homes can sometimes be accidentally ingested, stolen, misused and abused, officials said, and prescription drug abuse and accidental poisonings occur across the country. Outdated methods of disposing of medicines, such as flushing them down a toilet or throwing them in the garbage, pose potential safety and health hazards.
The event is being sponsored by the Cayuga County Sheriff's Office, Auburn Police Department, Elks USA and Confidential Help for Alcohol and Drugs in Auburn.
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