ADNC-RS, a clinical-genetic risk score, predicts Alzheimer ’s pathology in autopsy-confirmed Parkinson’s disease and Dementia with Lewy bodies

AbstractGrowing evidence suggests overlap between Alzheimer ’s disease (AD) and Parkinson’s disease (PD) pathophysiology in a subset of patients. Indeed, 50–80% of autopsy cases with a primary clinicopathological diagnosis of Lewy body disease (LBD)—most commonly manifesting during life as PD—have concomitant amyloid-beta and tau pathology, the def ining pathologies of AD. Here we evaluated common genetic variants in genome-wide association with AD as predictors of concomitant AD pathology in the brains of people with a primary clinicopathological diagnosis of PD or Dementia with Lewy Bodies (DLB), diseases both characterized by neuronal Lewy bodies. In the first stage of our study, 127 consecutive autopsy-confirmed cases of PD or DLB from a single center were assessed for AD neuropathological change (ADNC), and these same cases were genotyped at 20 single nucleotide polymorphisms (SNPs) found by genome-wide association study to associat e with risk for AD. In these 127 training set individuals, we developed a logistic regression model predicting the presence of ADNC, using backward stepwise regression for model selection and tenfold cross-validation to estimate performance. The best-fit model generated a risk score for ADNC (ADNC-R S) based on age at disease onset and genotype at three SNPs (APOE,BIN1, andSORL1 loci), with an area under the receiver operating curve (AUC) of 0.751 in our training set. In the replication stage of our study, we ass...
Source: Acta Neuropathologica - Category: Neurology Source Type: research

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There are twenty or so different proteins in the body that can become altered in ways that cause them to aggregate into solid deposits known as amyloids, spreading and encouraging other molecules of the same protein to do likewise. Amyloids are a phenomenon of old individuals and old tissues, for reasons that are much debated and no doubt quite complex. Some of these amyloids are well studied and well known to be harmful, such as the amyloid-β involved in Alzheimer's disease. Others are known but less well studied, and whether or not they are harmful is a question mark. The progression of knowledge over the pas...
Source: Fight Aging! - Category: Research Authors: Tags: Medicine, Biotech, Research Source Type: blogs
Adults with Alzheimer's disease and related dementia (ADRD) and their caregivers represent a sizeable and underserved segment of the population with low levels of moderate physical activity (MPA). Options for increasing MPA in community dwelling adults with ADRD and their caregivers are limited. A home-based physical activity intervention delivered remotely via video conferencing to groups of adults with ADRD and their caregivers (RGV), represents a potentially effective approach for increasing MPA in this group.
Source: Contemporary Clinical Trials - Category: Radiology Authors: Source Type: research
We examined individuals coming from the MIP installed across 3 Italian memory clinics, including subjects with Normal Cognition (CN, n = 432), Mild Cognitive Impairment (MCI, n = 456), and AD (n = 451). The GB classifier was applied to best discriminate the three diagnostic classes in 1,339 subjects, and the CCC strategy was used to refine the classical disease categories. Four dementia experts provided their diagnostic confidence (DC) of MCI conversion on an independent cohort of 38 patients. DC was based on clinical, neuropsychological, CSF, and structural MRI information and again with addition of the outcome from the M...
Source: Frontiers in Neurology - Category: Neurology Source Type: research
I recently collaborated on a review paper covering the history of clinical work on upregulation of nicotinamide adenine dinucleotide (NAD) as an approach to therapy. This is of interest to the aging research community because NAD is important to mitochondrial function. NAD levels diminish with age, alongside a loss of mitochondrial function that is known to contribute to the onset and progression of many age-related conditions. Animal studies and a few clinical trials have indicated that increased NAD levels may improve, for example, cardiovascular function in older individuals, as a result of improved mitochondrial functi...
Source: Fight Aging! - Category: Research Authors: Tags: Medicine, Biotech, Research Source Type: blogs
To coincide with World Alzheimer ’s Day, pain assessment app PainChek has published a new report on pain and dementia. 
Source: mobihealthnews - Category: Information Technology Source Type: news
Alzheimer's disease neuropathologies (amyloid- β and tau) frequently co-exist to varying degrees in Lewy body dementias (LBD), which include dementia with Lewy bodies (DLB) and Parkinson's disease dementia (PDD).
Source: Parkinsonism and Related Disorders - Category: Neurology Authors: Tags: Review article Source Type: research
DEMENTIA symptoms include memory loss, difficulty concentrating, and having slower thoughts. But you could be raising your risk of Alzheimer's disease signs by sleeping in a certain way. Should you change your sleep position to protect against dementia?
Source: Daily Express - Health - Category: Consumer Health News Source Type: news
Alzheimer ’s disease (AD) is a progressive, late-onset dementia with no effective treatment available. Recent studies suggest that AD pathology is driven by age-related changes in metabolism. Alterations in met...
Source: Journal of Neuroinflammation - Category: Neurology Authors: Tags: Short report Source Type: research
ConclusionsModules of tightly regulated lipids and proteins, drivers in lipid homeostasis and innate immunity, are strongly associated with AD phenotypes.
Source: Translational Neurodegeneration - Category: Neurology Source Type: research
Fight Aging! publishes news and commentary relevant to the goal of ending all age-related disease, to be achieved by bringing the mechanisms of aging under the control of modern medicine. This weekly newsletter is sent to thousands of interested subscribers. To subscribe or unsubscribe from the newsletter, please visit: https://www.fightaging.org/newsletter/ Longevity Industry Consulting Services Reason, the founder of Fight Aging! and Repair Biotechnologies, offers strategic consulting services to investors, entrepreneurs, and others interested in the longevity industry and its complexities. To find out m...
Source: Fight Aging! - Category: Research Authors: Tags: Newsletters Source Type: blogs
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