Sleep architecture changes in the APP23 mouse model manifest at onset of cognitive deficits.

Sleep architecture changes in the APP23 mouse model manifest at onset of cognitive deficits. Behav Brain Res. 2019 Jul 17;:112089 Authors: Van Erum J, Van Dam D, Sheorajpanday R, De Deyn PP Abstract Alzheimer's disease (AD), which accounts for most of the dementia cases, is, aside from cognitive deterioration, often characterized by the presence of non-cognitive symptoms such as activity and sleep disturbances. AD patients typically experience increased sleep fragmentation, excessive daytime sleepiness and night-time insomnia. Here, we sought to investigate the link between sleep architecture, cognition and amyloid pathology in the APP23 amyloidosis mouse model for AD. By means of polysomnographic recordings the sleep-wake cycle of freely-moving APP23 and wild-type (WT) littermates of 3, 6 and 12 months of age was examined. In addition, ambulatory cage activity was assessed by interruption of infrared beams surrounding the home cage. To assess visuo-spatial learning and memory a hidden-platform Morris-type Water Maze (MWM) experiment was performed. We found that sleep architecture is only slightly altered at early stages of pathology, but significantly deteriorates from 12 months of age, when amyloid plaques become diffusely present. APP23 mice of 12 months old had quantitative reductions of NREM and REM sleep and were more awake during the dark phase compared to WT littermates. These findings were confirmed by increased ambulatory cage activity during t...
Source: Behavioural Brain Research - Category: Neurology Authors: Tags: Behav Brain Res Source Type: research

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Authors: Fournier E Abstract Carpal tunnel syndrome (CTS) is too common a condition not to daily interact with the practitioner, if only because of its entanglement to other pathologies, causal or chance association. The typical symptomatology, with hand paresthesia and morning pain upon waking, is related to a median nerve injury in the confined space of the carpal tunnel, more often by local inflammation and tenosynovitis of the finger flexors (repetitive activity of the hands). SCC may be secondary to situations (pregnancy) or conditions (edema, hypothyroidism…), which exaggerate the ordinary pathophysiol...
Source: Revue de Medecine Interne - Category: Internal Medicine Tags: Rev Med Interne Source Type: research
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Source: Epilepsy and Behavior - Category: Neurology Source Type: research
Publication date: Available online 25 January 2020Source: Stem Cell ResearchAuthor(s): YI Yan, Yinghui Qiu, Aonan Zhao, Jian Zhao, Ying Wang, Yulei DengAbstractA 66-year old mild cognitive impairment (MCI) female patient donated her Peripheral blood mononuclear cells (PBMC). PBMC was reprogrammed using non-integrative Sendai viral vectors containing reprogramming factors OCT4, KLF4, SOX2 and C-MYC. The pluripotency of transgene-free iPSCs was confirmed by immunocytochemistry and ability of differentiation spontaneously into 3 germ layers in vitro. Moreover, the iPSC line displayed a normal karyotype. The apolipoprotein E (...
Source: Stem Cell Research - Category: Stem Cells Source Type: research
In this study, we investigated the risk factors and the development of dementia in MCI patients.Seventy six patients who diagnosed MCI, according to the Petersen criteria, over sixty-years old, and risk factors in transition to dementia were investigated. Neurological examinations, laboratory tests, systemic comorbidities, mini-mental state examination (MMSE) and the Montreal Cognitive Assessment (MoCA) scale of the patients every 3–6 months were investigated. Dementia developed in 44.7% of MCI patients. Vascular risk factors were the most prominent risk factors in the transition from MCI to dementia (p =&n...
Source: Journal of Clinical Neuroscience - Category: Neuroscience Source Type: research
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Source: Journal of Clinical Neuroscience - Category: Neuroscience Source Type: research
Authors: Cosentino E, Palmer K, Della Pietà C, Mitolo M, Meneghello F, Levedianos G, Iaia V, Venneri A Abstract AIMS: To assess the correlation between cognitive functioning and 3 gait parameters (gait speed, cadence, and stride length) in persons with mild cognitive impairment (MCI) and cognitively healthy controls and investigate linear correlations between gait and gray matter volumes. MATERIALS AND METHODS: Participants were recruited at IRCCS San Camillo Hospital, Venice, Italy (MCI=43; age-matched controls=43). Participants underwent comprehensive neuropsychological assessment. Gait speed, cadence,...
Source: Alzheimer Disease and Associated Disorders - Category: Psychiatry Tags: Alzheimer Dis Assoc Disord Source Type: research
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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...
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Source: Journal of Spinal Cord Medicine - Category: Orthopaedics Tags: J Spinal Cord Med Source Type: research
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Source: Expert Opinion on Drug Safety - Category: Drugs & Pharmacology Tags: Expert Opin Drug Saf Source Type: research
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