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https://www.readbyqxmd.com/read/28304312/cognitive-rehabilitation-in-alzheimer-s-disease-a-controlled-intervention-trial
#1
Katharina Brueggen, Elisabeth Kasper, Sina Ochmann, Henrike Pfaff, Steffi Webel, Wolfgang Schneider, Stefan Teipel
BACKGROUND: Cognitive Rehabilitation for Alzheimer's disease (AD) is an integrative multimodal intervention. It aims to maintain autonomy and quality of life by enhancing the patients' abilities to compensate for decreased cognitive functioning. OBJECTIVE: We evaluated the feasibility of a group-based Cognitive Rehabilitation approach in mild AD dementia and assessed its effect on activities of daily living (ADL). METHODS: We included 16 patients with AD dementia in a controlled partial-randomized design...
March 18, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28302022/glial-cell-a-potential-target-for-cellular-and-drug-based-therapy-in-various-cns-diseases
#2
Shakeeb Ahmed, Yasmin Sultana, Azka Gull, Tahir Khuroo, Mohd Aqil
Glial cells are integrated part of neurovascular unit of blood brain barrier (BBB). They undergo mitosis and mainly classified as astrocytes, oligodendrocytes, microglia, ependymal cells and nerve glial antigen 2 cells. Being a most versatile glial cell, astrocytes provide structural support to neurons, maintain brain homeostasis, take part in neuronal communication, and perform some housekeeping functions. Oligodendrocytes myelinate the neuronal axons for proper transmission of nerve impulse and microglia are brain immune cells...
March 16, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28298891/white-matter-deterioration-may-foreshadow-impairment-of-emotional-valence-determination-in-early-stage-dementia-of-the-alzheimer-type
#3
Ravi Rajmohan, Ronald C Anderson, Dan Fang, Austin G Meyer, Pavis Laengvejkal, Parunyou Julayanont, Greg Hannabas, Kitten Linton, John Culberson, Hafiz M R Khan, John De Toledo, P Hemachandra Reddy, Michael O'Boyle
In Alzheimer Disease (AD), non-verbal skills often remain intact for far longer than verbally mediated processes. Four (1 female, 3 males) participants with early-stage Clinically Diagnosed Dementia of the Alzheimer Type (CDDAT) and eight neurotypicals (NTs; 4 females, 4 males) completed the emotional valence determination test (EVDT) while undergoing BOLD functional magnetic resonance imaging (fMRI). We expected CDDAT participants to perform just as well as NTs on the EVDT, and to display increased activity within the bilateral amygdala and right anterior cingulate cortex (r-ACC)...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/28298839/correlation-between-hippocampal-volumes-and-medial-temporal-lobe-atrophy-in-patients-with-alzheimer-s-disease
#4
Vikas Dhikav, Sharmila Duraiswamy, Kuljeet Singh Anand
INTRODUCTION: Hippocampus undergoes atrophy in patients with Alzheimer's disease (AD). Calculation of hippocampal volumes can be done by a variety of methods using T1-weighted images of magnetic resonance imaging (MRI) of the brain. Medial temporal lobes atrophy (MTL) can be rated visually using T1-weighted MRI brain images. The present study was done to see if any correlation existed between hippocampal volumes and visual rating scores of the MTL using Scheltens Visual Rating Method...
January 2017: Annals of Indian Academy of Neurology
https://www.readbyqxmd.com/read/28298143/p450-eicosanoids-and-ros-interplay-in-brain-injury-and-neuroprotection
#5
Xuehong Liu, Catherine M Davis, Nabil J Alkayed
<b>Significance</b>. Eicosanoids are endogenous lipid mediators that play important roles in brain function and disease. Acute brain injury such as that occurs in stroke and traumatic brain injury (TBI) increases the formation of eicosanoids, which in return exacerbate or diminish injury. In chronic neurodegenerative diseases such as Alzheimer's disease (AD) and vascular dementia (VD), eicosanoid synthetic and metabolizing enzymes are altered, disrupting the balance between neuroprotective and neurotoxic eicosanoids...
March 16, 2017: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/28289371/exosomes-origins-and-therapeutic-potential-for-neurodegenerative-disease
#6
REVIEW
Diana K Sarko, Cindy E McKinney
Exosomes, small lipid bilayer vesicles, are part of the transportable cell secretome that can be taken up by nearby recipient cells or can travel through the bloodstream to cells in distant organs. Selected cellular cytoplasm containing proteins, RNAs, and other macromolecules is packaged into secreted exosomes. This cargo has the potential to affect cellular function in either healthy or pathological ways. Exosomal content has been increasingly shown to assist in promoting pathways of neurodegeneration such as β-amyloid peptide (Aβ) accumulation forming amyloid plaques in the brains of patients with Alzheimer's disease, and pathological aggregates of proteins containing α-synuclein in Parkinson's disease transferred to the central nervous system via exosomes...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28279898/concern-about-developing-alzheimer-s-disease-or-dementia-and-intention-to-be-screened-an-analysis-of-national-survey-data
#7
Weizhou Tang, Kristie Kannaley, Daniela B Friedman, Valerie J Edwards, Sara Wilcox, Sue E Levkoff, Rebecca H Hunter, Cheryl Irmiter, Basia Belza
OBJECTIVE: Early diagnosis of Alzheimer's disease (AD) or dementia is important so that patients can express treatment preferences, subsequently allowing caregivers to make decisions consistent with their wishes. This study explored the relationship between people's concern about developing AD/dementia, likelihood to be screened/tested, if experiencing changes in cognitive status or functioning, and concerns about sharing the diagnostic information with others. METHOD: A descriptive study was conducted using Porter Novelli's SummerStyles 2013 online survey data...
March 1, 2017: Archives of Gerontology and Geriatrics
https://www.readbyqxmd.com/read/28275911/sigma-1-%C3%AF-1-receptor-in-memory-and-neurodegenerative-diseases
#8
Tangui Maurice, Nino Goguadze
The sigma-1 (σ1) receptor has been associated with regulation of intracellular Ca(2+) homeostasis, several cellular signaling pathways, and inter-organelle communication, in part through its chaperone activity. In vivo, agonists of the σ1 receptor enhance brain plasticity, with particularly well-described impact on learning and memory. Under pathological conditions, σ1 receptor agonists can induce cytoprotective responses. These protective responses comprise various complementary pathways that appear to be differentially engaged according to pathological mechanism...
March 9, 2017: Handbook of Experimental Pharmacology
https://www.readbyqxmd.com/read/28270574/mild-cognitive-impairment-is-characterized-by-deficient-brainstem-and-cortical-representations-of-speech
#9
Gavin M Bidelman, Jill E Lowther, Sunghee H Tak, Claude Alain
Mild cognitive impairment (MCI) is recognized as a transitional phase in the progression toward more severe forms of dementia and is an early precursor to Alzheimer's disease. Previous neuroimaging studies reveal MCI is associated with aberrant sensory-perceptual processing in cortical brain regions subserving auditory and language function. However, whether the pathophysiology of MCI extends to speech processing prior to conscious awareness (brainstem) is unknown. Using a novel electrophysiological approach, we recorded both brainstem and cortical speech-evoked brain potentials (ERPs) in older, hearing-matched human listeners who did and did not present with subtle cognitive impairment revealed through behavioral neuropsychological testing...
March 7, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28270301/synapses-in-neurodegenerative-diseases
#10
Jae Ryul Bae, Sung Hyun Kim
Synapse is a basic structural and functional component for neural communication in the brain. To initiate and maintain continuous functional neural information flow, the presynaptic terminal is a structurally and functionally essential place as an initiator for communication. It contains synaptic vesicles (SV) filled with neurotransmitter, active zone for release place, and a number of proteins for SV fusion and retrieval. The structural and functional synaptic plasticity is one of the representative characteristics however it is also highly vulnerable in various pathological circumstances...
March 8, 2017: BMB Reports
https://www.readbyqxmd.com/read/28265241/app-a-novel-player-within-the-presynaptic-active-zone-proteome
#11
REVIEW
Jens Weingarten, Melanie Weingarten, Martin Wegner, Walter Volknandt
The amyloid precursor protein (APP) was discovered in the 1980s as the precursor protein of the amyloid A4 peptide. The amyloid A4 peptide, also known as A-beta (Aβ), is the main constituent of senile plaques implicated in Alzheimer's disease (AD). In association with the amyloid deposits, increasing impairments in learning and memory as well as the degeneration of neurons especially in the hippocampus formation are hallmarks of the pathogenesis of AD. Within the last decades much effort has been expended into understanding the pathogenesis of AD...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/28253991/micrornas-as-peripheral-biomarkers-in-aging-and-age-related-diseases
#12
S Kumar, M Vijayan, J S Bhatti, P H Reddy
MicroRNAs (miRNAs) are found in the circulatory biofluids considering the important molecules for biomarker study in aging and age-related diseases. Blood or blood components (serum/plasma) are primary sources of circulatory miRNAs and can release these in cell-free form either bound with some protein components or encapsulated with microvesicle particles, called exosomes. miRNAs are quite stable in the peripheral circulation and can be detected by high-throughput techniques like qRT-PCR, microarray, and sequencing...
2017: Progress in Molecular Biology and Translational Science
https://www.readbyqxmd.com/read/28246299/on-the-pathogenesis-of-alzheimer-s-disease-the-mam-hypothesis
#13
REVIEW
Estela Area-Gomez, Eric A Schon
The pathogenesis of Alzheimer's disease (AD) is currently unclear and is the subject of much debate. The most widely accepted hypothesis designed to explain AD pathogenesis is the amyloid cascade, which invokes the accumulation of extracellular plaques and intracellular tangles as playing a fundamental role in the course and progression of the disease. However, besides plaques and tangles, other biochemical and morphological features are also present in AD, often manifesting early in the course of the disease before the accumulation of plaques and tangles...
March 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/28243501/validation-of-olfactory-deficit-as-a-biomarker-of-alzheimer-disease
#14
Matthew R Woodward, Chaitanya V Amrutkar, Harshit C Shah, Ralph H B Benedict, Sanjanaa Rajakrishnan, Rachelle S Doody, Li Yan, Kinga Szigeti
BACKGROUND: We evaluated smell identification as a biomarker for Alzheimer disease (AD) by assessing its utility in differentiating normal aging from an amnestic disorder and determining its predictive value for conversion from amnestic mild cognitive impairment (aMCI) to AD. METHODS: Cross-sectional study (AD = 262, aMCI = 110, controls = 194) measuring smell identification (University of Pennsylvania Smell Identification Test [UPSIT]) and cognitive status was performed, as well as longitudinal analysis of aMCI participants (n = 96) with at least 1 year follow-up (mean 477...
February 2017: Neurology. Clinical Practice
https://www.readbyqxmd.com/read/28239639/alzheimer-s-biomarkers-in-daily-practice-abide-project-rationale-and-design
#15
Arno de Wilde, Ingrid S van Maurik, Marleen Kunneman, Femke Bouwman, Marissa Zwan, Eline A J Willemse, Geert Jan Biessels, Mirella Minkman, Ruth Pel, Niki S M Schoonenboom, Ellen M A Smets, Mike P Wattjes, Frederik Barkhof, Andrew Stephens, Erik J van Lier, Richard Batrla-Utermann, Philip Scheltens, Charlotte E Teunissen, Bart N M van Berckel, Wiesje M van der Flier
INTRODUCTION: The Alzheimer's biomarkers in daily practice (ABIDE) project is designed to translate knowledge on diagnostic tests (magnetic resonance imaging [MRI], cerebrospinal fluid [CSF], and amyloid positron emission tomography [PET]) to daily clinical practice with a focus on mild cognitive impairment (MCI). METHODS: ABIDE is a 3-year project with a multifaceted design and is structured into interconnected substudies using both quantitative and qualitative research methods...
2017: Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring
https://www.readbyqxmd.com/read/28225543/cuba-s-aging-and-alzheimer-longitudinal-study
#16
Juan de Jesús Llibre-Rodríguez, Adolfo Valhuerdi-Cepero, Ana M López-Medina, Lisseth Noriega-Fernández, Rutbeskia Porto-Álvarez, Milagros A Guerra-Hernández, Rodolfo I Bosch-Bayard, Tania Zayas-Llerena, Elaine Hernandez-Ulloa, Ana L Rodríguez-Blanco, Enrique Salazar-Pérez, Juan C Llibre-Guerra, Jorge J Llibre-Guerra, Beatriz Marcheco-Teruel
Aging and Alzheimer is a prospective, longitudinal cohort study involving 2944 adults aged ≥65 years from selected areas in Cuba's Havana and Matanzas Provinces. This door-to-door study, which began in 2003, includes periodic assessments of the cohort based on an interview; physical exam; anthropometric measurements; and diagnosis of dementia and its subtypes, other mental disorders, and other chronic non-communicable diseases and their risk factors. Information was gathered on sociodemographic characteristics; disability, dependency and frailty; use of health services; and characteristics of care and caregiver burden...
January 2017: MEDICC Review
https://www.readbyqxmd.com/read/28208745/astrocytic-pathological-calcium-homeostasis-and-impaired-vesicle-trafficking-in-neurodegeneration
#17
REVIEW
Nina Vardjan, Alexej Verkhratsky, Robert Zorec
Although the central nervous system (CNS) consists of highly heterogeneous populations of neurones and glial cells, clustered into diverse anatomical regions with specific functions, there are some conditions, including alertness, awareness and attention that require simultaneous, coordinated and spatially homogeneous activity within a large area of the brain. During such events, the brain, representing only about two percent of body mass, but consuming one fifth of body glucose at rest, needs additional energy to be produced...
February 8, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28202700/postmenopausal-hormone-therapy-and-alzheimer-disease-a-prospective-cohort-study
#18
Bushra Imtiaz, Marjo Tuppurainen, Toni Rikkonen, Miia Kivipelto, Hilkka Soininen, Heikki Kröger, Anna-Maija Tolppanen
OBJECTIVE: To explore the association between postmenopausal hormone therapy (HT) and Alzheimer disease (AD). METHODS: Twenty-year follow-up data from the Kuopio Osteoporosis Risk Factor and Prevention study cohort were used. Self-administered questionnaires were sent to all women aged 47-56 years, residing in Kuopio Province starting in 1989 until 2009, every 5th year. Register-based information on HT prescriptions was available since 1995. Probable AD cases, based on DSM-IV and National Institute of Neurological and Communicative Disorders and Stroke-Alzheimer's Disease and Related Disorders Association criteria, were identified from the special reimbursement register (1999-2009)...
March 14, 2017: Neurology
https://www.readbyqxmd.com/read/28184302/the-role-of-exosomes-in-the-pathogenesis-of-alzheimer-disease
#19
REVIEW
Tingting Xiao, Weiwei Zhang, Bin Jiao, Chu-Zheng Pan, Xixi Liu, Lu Shen
Exosomes are small vesicles secreted by most cell types including neurons that function in intercellular communication through transfer of their cargo or encapsulate and eliminate unnecessary cellular components and therefore have a broad impact on nerve development, activation and regeneration. In addition, exosomes have been observed to be involved in spreading pathological misfolded proteins, thereby leading to the onset and propagation of disease. Alzheimer disease (AD) is the most common form of dementia and characterized by two types of lesions: amyloid plaques and neurofibrillary tangles...
2017: Translational Neurodegeneration
https://www.readbyqxmd.com/read/28167212/recruitment-of-rna-molecules-by-connexin-rna-binding-motifs-implication-in-rna-and-dna-transport-through-microvesicles-and-exosomes
#20
REVIEW
Marta Varela-Eirin, Adrian Varela-Vazquez, Marina Rodríguez-Candela Mateos, Anton Vila-Sanjurjo, Eduardo Fonseca, José L Mascareñas, M Eugenio Vázquez, Maria D Mayan
Connexins (Cxs) are integral membrane proteins that form high-conductance plasma membrane channels, allowing communication from cell to cell (via gap junctions) and from cells to the extracellular environment (via hemichannels). Initially described for their role in joining excitable cells (nerve and muscle), gap junctions (GJs) are found between virtually all cells in solid tissues and are essential for functional coordination by enabling the direct transfer of small signalling molecules, metabolites, ions, and electrical signals from cell to cell...
April 2017: Biochimica et Biophysica Acta
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