Simple Blood Test Highly Accurate in Detecting Alzheimer's Biomarker Simple Blood Test Highly Accurate in Detecting Alzheimer's Biomarker

A high-precision assay can detect the key Alzheimer's disease biomarker by using a simple blood test, potentially eliminating the need for a lumbar puncture, new research suggests.Medscape Medical News
Source: Medscape Pathology Headlines - Category: Pathology Tags: Neurology & Neurosurgery News Source Type: news

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AbstractLumbar puncture (LP) is a common way of collecting cerebrospinal fluid (CSF) both in the clinic and in research. In this extension of a study on the relationship between sleep deprivation and CSF biomarkers for Alzheimer ’s disease, we investigated CSF biomarker dynamics in relation to rebound sleep after sleep deprivation. Two LPs were performed within 3 days in 13 healthy volunteers. We noticed an unexpected sharp rise in biomarker concentrations in the second sample and therefore repeated the experiment, but w ithout sleep intervention, in four additional individuals. The findings were similar in thes...
Source: Fluids and Barriers of the CNS - Category: Neuroscience Source Type: research
Conditions:   Mild Traumatic Brain Injury;   Moderate Traumatic Brain Injury;   Mild Cognitive Impairment Interventions:   Device: No Intervention is used for this study but all subjects will be asked to complete EEG testing and an MRI scan.;   Procedure: No intervention is used for this study but all subjects will be asked to complete a venous blood draw procedure and a lumbar puncture procedure. Sponsor:   VA Boston Healthcare System Not yet recruiting
Source: - Category: Research Source Type: clinical trials
After spending 30 minutes hunting for your car in a parking lot, or getting lost on a familiar route, have you ever considered asking your doctor for a blood test or brain scan to find out if you have Alzheimer’s disease? A number of factors contribute to Alzheimer’s disease. By definition, this form of dementia involves the buildup of a protein in brain called beta-amyloid. Beta-amyloid forms plaques that disrupt communication between brain cells, and ultimately destroys them. For this reason, tests for Alzheimer’s disease focus on beta-amyloid. Blood tests for Alzheimer’s disease are being develop...
Source: Harvard Health Blog - Category: Consumer Health News Authors: Tags: Alzheimer's Disease Healthy Aging Memory Tests and procedures Source Type: blogs
ute;rdenas L, Benítez-King G Abstract Histopathological hallmarks of dementia have been described postmortem in the brain of patients with Alzheimer's disease (AD). Tau, a microtubule associated protein, is abnormally arranged in neurofibrillary tangles. In living AD patients, total tau (t-tau) and hyperphosphorylated tau (p-tau) levels are increased in the cerebrospinal fluid obtained by lumbar puncture. Herein, we studied the t-tau and p-tau levels as well as the subcellular distribution of t-tau in olfactory neuronal precursors obtained by exfoliation of the nasal cavity of AD patients and control partic...
Source: Cellular and Molecular Neurobiology - Category: Cytology Authors: Tags: Cell Mol Neurobiol Source Type: research
CONCLUSION: Cerebrospinal fluid neurofilament light shows promise as a diagnostic test to assist with the often challenging diagnostic dilemma of distinguishing psychiatric disorders from neurodegenerative and neurological disorders. Further studies are warranted to replicate and expand on these findings, including on plasma neurofilament light. PMID: 31220922 [PubMed - as supplied by publisher]
Source: The Australian and New Zealand Journal of Psychiatry - Category: Psychiatry Authors: Tags: Aust N Z J Psychiatry Source Type: research
Conclusion: Aβ42 and tau seem to be worthy candidates for future salivary biomarkers for AD, but other biomarkers such as lactoferrin and selected metabolites also have potential. More studies must be carried out with larger sample sizes and a standardization of the sampling and processing method. Factors such as diurnal variation, AD patients' decreased ability of oral self-care, and salivary flowrates must be taken into consideration. PMID: 31191751 [PubMed - in process]
Source: Disease Markers - Category: Laboratory Medicine Tags: Dis Markers Source Type: research
CONCLUSIONS: These findings suggest that a self-report questionnaire and aspects of a cognitive mapping task may be particularly appropriate for development as screening tools for identifying individuals in the preclinical AD continuum. PMID: 31197326 [PubMed - as supplied by publisher]
Source: Archives of Clinical Neuropsychology - Category: Psychiatry & Psychology Authors: Tags: Arch Clin Neuropsychol Source Type: research
Conclusions: Our results demonstrate that the presence and extent of cSS are associated with reduced CSF ß-amyloid 42 levels. Further studies are needed to investigate the underlying mechanisms of this association. Introduction Cerebral amyloid angiopathy (CAA)—characterized by the deposition of ß-amyloid in the walls of leptomeningeal vessels—is a common cerebral small vessel disease and a major cause of intracerebral hemorrhage in the elderly (1–3). Furthermore, it has become evident that CAA is associated with cognitive impairment (4). Specifically, it has been shown that CAA patien...
Source: Frontiers in Neurology - Category: Neurology Source Type: research
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