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https://www.readbyqxmd.com/read/29333676/ether-%C3%A3-go-go-k-channels-effective-modulators-of-neuronal-excitability
#1
Christiane K Bauer, Jürgen R Schwarz
Mammalian EAG (ether-à-go-go) channels are voltage-gated K+ channels. They are encoded by the KCNH gene family and divided into three subfamilies, eag (Kv10), erg (eag-related gene; Kv11) and elk (eag-like; Kv12). All EAG channel subtypes are expressed in the brain where they effectively modulate neuronal excitability. This Topical Review describes the biophysical properties of each of the EAG channel subtypes, their function in neurons and the neurological diseases induced by EAG channel mutations. In contrast to the function of erg currents in the heart where they contribute to repolarization of the cardiac action potential, erg currents in neurons are involved in the maintenance of the resting potential, setting of action potential threshold and frequency accommodation...
January 15, 2018: Journal of Physiology
https://www.readbyqxmd.com/read/29333635/the-changing-relationship-between-bronchopulmonary-dysplasia-and-cognition-in-very-preterm-infants
#2
Jane E Brumbaugh, Tarah T Colaizy, Neel M Patel, Jonathan M Klein
AIM: To characterize the relationship between bronchopulmonary dysplasia (BPD) severity and cognition in the post-surfactant era. METHODS: This was a single-center retrospective analysis of a cohort of infants born 2009-2012. Inclusion criteria were: admission within 48 hours of birth, gestational age 22-0/7-31-6/7 weeks, birth weight 400-1500 g, and Bayley Scales of Infant and Toddler Development-III testing at 18-26 months corrected age. Infants (n=151) were classified by BPD severity with the NIH Workshop definition...
January 15, 2018: Acta Paediatrica
https://www.readbyqxmd.com/read/29331082/mechanistic-target-of-rapamycin-complex-1-and-2-in-human-temporal-lobe-epilepsy
#3
Delia M Talos, Leah M Jacobs, Sarah Gourmaud, Carlos A Coto, Hongyu Sun, Kuei-Cheng Lim, Timothy H Lucas, Kathryn A Davis, Maria Martinez-Lage, Frances E Jensen
OBJECTIVE: Temporal lobe epilepsy (TLE) is a chronic epilepsy syndrome defined by seizures and progressive neurological disabilities, including cognitive impairments, anxiety and depression. Here, human TLE specimens were investigated focusing on the mechanistic target of rapamycin (mTOR) Complex 1 (mTORC1) and Complex 2 (mTORC2) activities in the brain, as both pathways may represent unique targets for treatment. METHODS: Surgically resected hippocampal and temporal lobe samples from therapy-resistant TLE patients were analyzed by Western blotting to quantify the expression of established mTORC1 and mTORC2 activity markers and upstream or downstream signaling pathways involving the two complexes...
January 13, 2018: Annals of Neurology
https://www.readbyqxmd.com/read/29329515/engaging-clinicians-and-patients-to-assess-and-improve-frailty-measurement-in-adults-with-end-stage-renal-disease
#4
Sarah Van Pilsum Rasmussen, Jonathan Konel, Fatima Warsame, Hao Ying, Brian Buta, Christine Haugen, Elizabeth King, Sandra DiBrito, Ravi Varadhan, Leocadio Rodríguez-Mañas, Jeremy D Walston, Dorry L Segev, Mara A McAdams-DeMarco
BACKGROUND: The Fried frailty phenotype, a measure of physiologic reserve defined by 5 components (exhaustion, unintentional weight loss, low physical activity, slow walking speed, and poor grip strength), is associated with poor outcomes among ESRD patients. However, these 5 components may not fully capture physiologic reserve in this population. We aimed to ascertain opinions of ESRD clinicians and patients about the usefulness of the Fried frailty phenotype and interventions to improve frailty in ESRD patients, and to identify novel components to further characterize frailty in ESRD...
January 12, 2018: BMC Nephrology
https://www.readbyqxmd.com/read/29328983/social-and-cognitive-control-skills-in-long-life-occupation-activities-modulate-the-brain-reserve-in-the-behavioural-variant-of-frontotemporal-dementia
#5
Alessandra Dodich, Giulia Carli, Chiara Cerami, Sandro Iannaccone, Giuseppe Magnani, Daniela Perani
BACKGROUND: Cognitive reserve may delay disease onset and mitigate symptoms presentation in neurodegenerative dementias. Although high occupation levels can be associated with higher cognitive reserve in the behavioural variant of frontotemporal dementia (bvFTD), it was never addressed how specific occupation profiles involving social interaction, executive and attention abilities can modulate neural reserve in bvFTD. MATERIALS AND METHODS: We retrospectively included thirty-seven bvFTD patients with clinical-neuropsychological and FDG-PET brain metabolic data...
December 19, 2017: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/29324562/effectiveness-of-interventions-to-prevent-pre-frailty-and-frailty-progression-in-older-adults-a-systematic-review
#6
João Apóstolo, Richard Cooke, Elzbieta Bobrowicz-Campos, Silvina Santana, Maura Marcucci, Antonio Cano, Miriam Vollenbroek-Hutten, Federico Germini, Barbara D'Avanzo, Holly Gwyther, Carol Holland
OBJECTIVE: To summarize the best available evidence regarding the effectiveness of interventions for preventing frailty progression in older adults. INTRODUCTION: Frailty is an age-related state of decreased physiological reserves characterized by an increased risk of poor clinical outcomes. Evidence supporting the malleability of frailty, its prevention and treatment, has been presented. INCLUSION CRITERIA: The review considered studies on older adults aged 65 and over, explicitly identified as pre-frail or frail, who had been undergoing interventions focusing on the prevention of frailty progression...
January 2018: JBI Database of Systematic Reviews and Implementation Reports
https://www.readbyqxmd.com/read/29324460/sex-differences-in-alzheimer-s-disease
#7
Keith R Laws, Karen Irvine, Tim M Gale
PURPOSE OF REVIEW: Women are more impacted by Alzheimer's disease than men - they are at significantly greater risk of developing Alzheimer's disease, and recent research shows that they also appear to suffer a greater cognitive deterioration than men at the same disease stage. The purpose of this article is to review recent studies on examining sex differences in cognitive function in Alzheimer's disease. RECENT FINDINGS: We searched electronically for articles, reviews and meta-analyses published between 1/2016 and 12/2017 and identified 298 articles on sex differences in cognition in Alzheimer's disease...
January 10, 2018: Current Opinion in Psychiatry
https://www.readbyqxmd.com/read/29323751/-18-f-av-1451-clustering-of-entorhinal-and-cortical-uptake-in-alzheimer-s-disease
#8
Jennifer L Whitwell, Jonathan Graff-Radford, Nirubol Tosakulwong, Stephen D Weigand, Mary Machulda, Matthew L Senjem, Christopher G Schwarz, Anthony J Spychalla, David T Jones, Daniel A Drubach, David S Knopman, Bradley F Boeve, Nilüfer Ertekin-Taner, Ronald C Petersen, Val J Lowe, Clifford R Jack, Keith A Josephs
OBJECTIVE: To use a cluster analysis of [18 F]AV-1451 tau-PET data to determine how subjects with Alzheimer's disease vary in the relative involvement of the entorhinal cortex and neocortex, and determine whether relative involvement of these two regions can help explain variability in age and clinical phenotype in Alzheimer's disease. METHODS: We calculated [18 F]AV-1451 uptake in entorhinal cortex and neocortex in 62 amyloid-positive Alzheimer's disease patients (39 typical and 23 atypical presentation)...
January 11, 2018: Annals of Neurology
https://www.readbyqxmd.com/read/29318972/repetitive-transcranial-magnetic-stimulation-reverses-a%C3%AE-1-42-induced-dysfunction-in-gamma-oscillation-during-working-memory
#9
Wenwen Bai, Tiaotiao Liu, Mengmeng Dou, Mi Xia, Jun Lu, Xin Tian
INTRODUCTION: Alzheimer's disease (AD) is a neurodegenerative disease that gradually induces cognitive deficits in the elderly and working memory impairment is typically observed in AD. Amyloid-β peptide (Aβ) is a causative factor for the cognitive impairments in AD. Gamma oscillations have been recognized to play important roles in various cognitive functions including working memory. Previous study reported that Aβ induces gamma oscillation dysfunction in working memory. Repetitive transcranial magnetic stimulation (rTMS) represents a technique for noninvasive stimulation to induce cortical activity and excitability changes and has been accepted for increasing brain excitability and regulating cognitive behavior...
January 9, 2018: Current Alzheimer Research
https://www.readbyqxmd.com/read/29318936/-brain-reserve-and-cognitive-reserve-should-always-be-taken-into-account-when-studying-neurodegeneration-commentary
#10
Maria Pia Amato
No abstract text is available yet for this article.
January 1, 2018: Multiple Sclerosis: Clinical and Laboratory Research
https://www.readbyqxmd.com/read/29318923/-brain-reserve-and-cognitive-reserve-should-always-be-taken-into-account-when-studying-neurodegeneration-yes
#11
James F Sumowski
No abstract text is available yet for this article.
January 1, 2018: Multiple Sclerosis: Clinical and Laboratory Research
https://www.readbyqxmd.com/read/29318919/-brain-reserve-and-cognitive-reserve-should-always-be-taken-into-account-when-studying-neurodegeneration-no
#12
Jaume Sastre-Garriga
No abstract text is available yet for this article.
January 1, 2018: Multiple Sclerosis: Clinical and Laboratory Research
https://www.readbyqxmd.com/read/29316334/geriatric-assessment-of-physical-and-cognitive-functioning-in-a-diverse-cohort-of-systemic-lupus-erythematosus-patients-a-pilot-study
#13
Laura Plantinga, Benjamin D Tift, Charmayne Dunlop-Thomas, S Sam Lim, C Barrett Bowling, Cristina Drenkard
OBJECTIVE: To use multi-domain functional assessment, commonly performed in geriatric patients but novel among SLE patients, to better understand functional impairment in SLE. METHODS: We recruited 60 adult participants [aged 20-39 (26.7%), 40-59 (50.0%), and ≥60 (23.3%); 80.0% black; 90.0% female] from an existing cohort of SLE patients. During in-person visits (10/16-4/17), we evaluated physical performance (range 0-4; higher scores = better performance); cognitive performance (five fluid cognition domains; adjusted t-scores); and self-reported measures including physical functioning (t-scores), activities of daily living (ADLs), falls, and life-space mobility...
January 5, 2018: Arthritis Care & Research
https://www.readbyqxmd.com/read/29315796/the-association-of-self-reported-diabetes-with-impaired-social-functioning-in-low-middle-and-high-income-countries-findings-from-the-world-health-survey
#14
A Loerbroks, R M Herr, A Icks, J A Bosch
AIM: Epidemiological studies from high-income countries show that diabetes is associated with impaired social functioning. As healthcare systems in middle- and low-income countries offer fewer resources to curtail the potential social impact of diabetes, we performed a comparative study on the diabetes-social impairment link in low-, middle- and high-income countries. METHODS: We use data from the cross-sectional World Health Survey (n = 235 428 from 10 low-income, 29 middle-income and 9 high-income countries)...
January 7, 2018: Diabetic Medicine: a Journal of the British Diabetic Association
https://www.readbyqxmd.com/read/29315577/bidirectional-variation-in-glutamate-efflux-in-the-medial-prefrontal-cortex-induced-by-selective-positive-and-negative-allosteric-mglur5-modulators
#15
Sarah N Isherwood, Trevor W Robbins, Jeffrey W Dalley, Anton Pekcec
Dysregulation of prefrontal cortical glutamatergic signalling via NMDA receptor hypofunction has been implicated in cognitive dysfunction and impaired inhibitory control in such neuropsychiatric disorders as schizophrenia, attention deficit hyperactivity disorder and drug addiction. Although NMDA receptors functionally interact with metabotropic glutamate receptor 5 (mGluR5), the consequence of this interaction for glutamate release in the prefrontal cortex (PFC) is unknown. We therefore investigated the effects of positive and negative allosteric mGluR5 modulation on changes in extracellular glutamate efflux in the medial PFC (mPFC) induced by systemic administration of the non-competitive NMDA receptor antagonist dizocilpine (or MK801) in rats...
January 6, 2018: Journal of Neurochemistry
https://www.readbyqxmd.com/read/29315566/aerobic-exercise-promotes-hippocampal-neurogenesis-through-skeletal-myofibre-derived-vascular-endothelial-growth-factor
#16
I Vonderwalde, A Kovacs-Litman
The beneficial effects of exercise, including improved cognitive performance, memory, and mood, are well documented and thought to be a result of increased hippocampal neurogenesis through the proliferation and differentiation of neural precursor cells (NPCs) within the dentate gyrus, although the mechanisms by which this occurs is unknown. This article is protected by copyright. All rights reserved.
January 9, 2018: Journal of Physiology
https://www.readbyqxmd.com/read/29304225/gender-differences-in-the-association-between-leisure-activity-in-adulthood-and-cognitive-function-in-old-age-a-prospective-longitudinal-population-based-study
#17
Linda B Hassing
Objectives: To examine the long-term association between leisure activities in adulthood and cognitive function in old age while recognizing gender differences in activity profiles. Methods: The sample included 340 cognitively healthy twins enrolled in the OCTO-Twin Study, a longitudinal study on cognitive aging. Leisure activity was measured in midlife and cognitive function in old age (mean age 83). Leisure activities covered the domains of domestic, intellectual-cultural, and self-improvement activities...
September 4, 2017: Journals of Gerontology. Series B, Psychological Sciences and Social Sciences
https://www.readbyqxmd.com/read/29303036/cognitive-reserve-cognition-and-regional-brain-damage-in-ms-a-2%C3%A2-year-longitudinal-study
#18
Maria Assunta Rocca, Gianna C Riccitelli, Alessandro Meani, Elisabetta Pagani, Paola Del Sette, Vittorio Martinelli, Giancarlo Comi, Andrea Falini, Massimo Filippi
BACKGROUND: According to the cognitive reserve (CR) theory, enriching experiences protect against cognitive decline. OBJECTIVES: To investigate the dynamic interaction between CR and global/regional measures of brain white matter (WM) and gray matter (GM) damage and their effect on cognitive performance in multiple sclerosis (MS). METHODS: Baseline and 2 -year three-dimensional (3D) T1-weighted scans were obtained from 54 MS patients and 20 healthy controls...
January 1, 2018: Multiple Sclerosis: Clinical and Laboratory Research
https://www.readbyqxmd.com/read/29288532/impaired-cognitive-ability-at-2-5-years-predicts-later-visual-and-ophthalmological-problems-in-children-born-very-preterm
#19
Jonina Hreinsdottir, Ylva Fredriksson Kaul, Lena Hellström-Westas, Kerstin Rosander, Claes von Hofsten, Gerd Holmström
AIM: To identify possible predictive factors for visual problems at 6.5 years in children born very preterm. METHODS: During 2004 to 2007, all very preterm infants (gestational age < 32 weeks) in Uppsala County, Sweden, were screened for retinopathy of prematurity (ROP) neonatally; at four months visual tracking was tested; at 2.5 years, visuospatial and cognitive tests were carried out. At 6.5 years, 84 preterm children and a reference group of 64 full-term children underwent ophthalmological testing...
December 29, 2017: Acta Paediatrica
https://www.readbyqxmd.com/read/29288507/effectiveness-of-executive-function-training-on-mental-set-shifting-working-memory-and-inhibition-in-healthy-older-adults-a-double-blind-randomized-controlled-trial
#20
Huei-Ling Chiu, Pi-Tuan Chan, Ching-Chiu Kao, Hsin Chu, Pi-Chen Chang, Shu-Tai Sheen Hsiao, Doresses Liu, Wen-Chi Chang, Kuei-Ru Chou
AIMS: To evaluate the effectiveness of executive function training on mental set shifting, working memory and inhibition for healthy older adults. BACKGROUND: Executive functions control and guide individuals' behaviors through a top-down cognitive model and have been regarded as the exhibition and integration of various high-level cognitive functions. However, prior studies have rarely focused on the subcomponent indicators of executive function, such as mental set shifting, working memory and inhibition in healthy older adults...
December 29, 2017: Journal of Advanced Nursing
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