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Deep Brain Stimulation Alzheimer's

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https://www.readbyqxmd.com/read/29735372/fornical-closed-loop-stimulation-for-alzheimer-s-disease
#1
REVIEW
Suhan Senova, Antoine Chaillet, Andres M Lozano
Pharmacological neuromodulation strategies have shown limited efficacy in treating memory deficits related to Alzheimer's disease (AD). Despite encouraging results from a few preclinical studies, clinical trials investigating open-loop deep brain stimulation (DBS) for AD have not been successful. Recent refinements in understanding the various phases of memory processes, animal studies investigating phase-specific modulation of hippocampal activity during memorization, and clinical studies using closed-loop DBS strategies to treat patients with movement disorders, all point to the need to investigate closed-loop fornical DBS strategies to better understand memory dynamics and potentially treat memory deficits in AD preclinical models...
May 4, 2018: Trends in Neurosciences
https://www.readbyqxmd.com/read/29576909/deep-brain-stimulation-for-alzheimer-s-disease-an-update
#2
REVIEW
Majed Aldehri, Yasin Temel, Ibrahim Alnaami, Ali Jahanshahi, Sarah Hescham
Background: Dementia is among the leading causes of severe and long-term disability worldwide, decreasing the quality of life of individuals and families. Moreover, it induces an enormous economic burden on societies. The most prevalent cause of dementia is Alzheimer's disease (AD). Because current treatment options for AD are limited, deep brain stimulation (DBS) has been considered. Methods: The aim of this review is to survey the current understanding regarding the effects of DBS in AD and possibly shed light on the mechanisms of DBS in AD...
2018: Surgical Neurology International
https://www.readbyqxmd.com/read/29570050/forniceal-deep-brain-stimulation-induces-gene-expression-and-splicing-changes-that-promote-neurogenesis-and-plasticity
#3
Amy E Pohodich, Hari Yalamanchili, Ayush T Raman, Ying-Wooi Wan, Michael Gundry, Shuang Hao, Haijing Jin, Jianrong Tang, Zhandong Liu, Huda Y Zoghbi
Clinical trials are currently underway to assess the efficacy of forniceal deep brain stimulation (DBS) for improvement of memory in Alzheimer's patients, and forniceal DBS has been shown to improve learning and memory in a mouse model of Rett syndrome (RTT), an intellectual disability disorder caused by loss-of-function mutations in MECP2 . The mechanism of DBS benefits has been elusive, however, so we assessed changes in gene expression, splice isoforms, DNA methylation, and proteome following acute forniceal DBS in wild-type mice and mice lacking Mecp2 ...
March 23, 2018: ELife
https://www.readbyqxmd.com/read/29528701/deep-brain-stimulation-for-people-with-alzheimer-s-disease-anticipating-potential-effects-on-the-tripartite-self
#4
John Noel M Viaña, Frederic Gilbert
Memory dysfunction and cognitive impairments due to Alzheimer's disease can affect the selfhood and identity of afflicted individuals, causing distress to both people with Alzheimer's disease and their caregivers. Recently, a number of case studies and clinical trials have been conducted to determine the potential of deep brain stimulation as a therapeutic modality for people with Alzheimer's disease. Some of these studies have shown that deep brain stimulation could induce flashbacks and stabilize or even improve memory...
January 1, 2018: Dementia
https://www.readbyqxmd.com/read/29400666/deep-brain-stimulation-of-frontal-lobe-networks-to-treat-alzheimer-s-disease
#5
Douglas W Scharre, Emily Weichart, Dylan Nielson, Jun Zhang, Punit Agrawal, Per B Sederberg, Michael V Knopp, Ali R Rezai
The study objective was to evaluate the safety and efficacy of deep brain stimulation (DBS) at the ventral capsule/ventral striatum (VC/VS) region to specifically modulate frontal lobe behavioral and cognitive networks as a novel treatment approach for Alzheimer's disease (AD) patients. This is a non-randomized phase I prospective open label interventional trial of three subjects with matched comparison groups. AD participants given DBS for at least 18 months at the VC/VS target were compared on the Clinical Dementia Rating-Sum of Boxes (CDR-SB), our primary outcome clinical measure, to matched groups without DBS from the AD Neuroimaging Initiative (ADNI) cohort...
2018: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/29260798/potential-for-intermittent-stimulation-of-nucleus-basalis-of-meynert-to-impact-treatment-of-alzheimer-s-disease
#6
David T Blake, Alvin V Terry, Marc Plagenhoef, Christos Constantinidis, Ruifeng Liu
The brain's cholinergic arousal pathways decline in parallel with the brain's executive functions in aging and Alzheimer's Disease. The frontline and currently most effective approach to treating Alzheimer's disease is the administration of cholinesterase inhibitors, which, in a dose dependent manner, improve the symptoms of cognitive decline over the first months of treatment before further decline occurs. We recently showed that intermittent deep brain stimulation of the nucleus basalis of Meynert improves working memory function in young adult monkeys, and that this improvement depended on cholinergic function...
2017: Communicative & Integrative Biology
https://www.readbyqxmd.com/read/29246746/chronic-deep-brain-stimulation-in-an-alzheimer-s-disease-mouse-model-enhances-memory-and-reduces-pathological-hallmarks
#7
Amandeep Mann, Elise Gondard, Davide Tampellini, Jorge A T Milsted, Desiree Marillac, Clement Hamani, Suneil K Kalia, Andres M Lozano
BACKGROUND: Alzheimer's disease (AD) is a progressive degenerative disorder that currently remains extremely disabling. Recent work has shown that deep brain stimulation (DBS) has promising effects in AD patients. In parallel to the clinical trials, we investigated the impact of chronic DBS in 3xTg mice, a well-established animal model of AD. METHODS: AD mice were assigned to control (Cont), non-stimulation (NS) and stimulation (DBS) groups, along with age matched wild type controls (WT-Cont)...
March 2018: Brain Stimulation
https://www.readbyqxmd.com/read/29124106/gamma-rhythm-low-field-magnetic-stimulation-alleviates-neuropathologic-changes-and-rescues-memory-and-cognitive-impairments-in-a-mouse-model-of-alzheimer-s-disease
#8
Junli Zhen, Yanjing Qian, Xiechuan Weng, Wenting Su, Jianliang Zhang, Lihui Cai, Lin Dong, Haiting An, Ruijun Su, Jiang Wang, Yan Zheng, Xiaomin Wang
Introduction: The abnormal amyloid β (Aβ) accumulation and Aβ-related neural network dysfunction are considered central to the pathogenesis of Alzheimer's disease (AD) at the early stage. Deep-brain reachable low field magnetic stimulation (DMS), a novel noninvasive approach that was designed to intervene the network activity in brains, has been found to alleviate stress-related cognitive impairments. Methods: Amyloid precursor protein/presenilin-1 transgenic mice (5XFAD) were treated with DMS, and cognitive behavior and AD-like pathologic changes in the neurochemical and electrophysiological properties in 5XFAD mice were assessed...
November 2017: Alzheimer's & Dementia: Translational Research & Clinical Interventions
https://www.readbyqxmd.com/read/29072895/low-frequency-pulsed-electromagnetic-field-is-able-to-modulate-mirnas-in-an-experimental-cell-model-of-alzheimer-s-disease
#9
Enrica Capelli, Filippo Torrisi, Letizia Venturini, Maria Granato, Lorenzo Fassina, Giuseppe Francesco Damiano Lupo, Giovanni Ricevuti
The aim of the present study was to investigate on the effects of a low-frequency pulsed electromagnetic field (LF-PEMF) in an experimental cell model of Alzheimer's disease (AD) to assess new therapies that counteract neurodegeneration. In recent scientific literature, it is documented that the deep brain stimulation via electromagnetic fields (EMFs) modulates the neurophysiological activity of the pathological circuits and produces clinical benefits in AD patients. EMFs are applied for tissue regeneration because of their ability to stimulate cell proliferation and immune functions via the HSP70 protein family...
2017: Journal of Healthcare Engineering
https://www.readbyqxmd.com/read/29065581/low-frequency-pulsed-electromagnetic-field-is-able-to-modulate-mirnas-in-an-experimental-cell-model-of-alzheimer-s-disease
#10
Enrica Capelli, Filippo Torrisi, Letizia Venturini, Maria Granato, Lorenzo Fassina, Giuseppe Francesco Damiano Lupo, Giovanni Ricevuti
The aim of the present study was to investigate on the effects of a low-frequency pulsed electromagnetic field (LF-PEMF) in an experimental cell model of Alzheimer's disease (AD) to assess new therapies that counteract neurodegeneration. In recent scientific literature, it is documented that the deep brain stimulation via electromagnetic fields (EMFs) modulates the neurophysiological activity of the pathological circuits and produces clinical benefits in AD patients. EMFs are applied for tissue regeneration because of their ability to stimulate cell proliferation and immune functions via the HSP70 protein family...
2017: Journal of Healthcare Engineering
https://www.readbyqxmd.com/read/29055119/deep-brain-stimulation-of-the-nucleus-basalis-of-meynert-attenuates-early-eeg-components-associated-with-defective-sensory-gating-in-patients-with-alzheimer-disease-a-two-case-study
#11
Stefan Dürschmid, Christoph Reichert, Jens Kuhn, Hans-Joachim Freund, Hermann Hinrichs, Hans-Jochen Heinze
Alzheimer's disease (AD) is associated with deterioration of memory and cognitive function and a degeneration of neurons of the nucleus basalis of Meynert (NBM). The NBM is the major input source of Acetylcholine (ACh) to the cortex. The decreasing cholinergic innervation of the cortex due to degeneration of the NBM might be the cause of loss of memory function. NBM-Deep Brain Stimulation (NBM-DBS) is considered to serve as a potential therapeutic option for AD patients by supporting residual cholinergic transmission to stabilize oscillatory activity in memory relevant circuits...
October 20, 2017: European Journal of Neuroscience
https://www.readbyqxmd.com/read/28927833/modulation-of-hippocampal-activity-with-fornix-deep-brain-stimulation
#12
Paul H Stypulkowski, Scott R Stanslaski, Jonathon E Giftakis
BACKGROUND: Deep Brain Stimulation (DBS) within the Papez circuit is under investigation as a treatment for epilepsy and Alzheimer's disease. We previously reported the effects of stimulation at nodes within this network (anterior thalamic nucleus and hippocampus) on hippocampal activity in a large animal model, using a chronic implantable, clinical-grade system that permits concurrent stimulation and recording. OBJECTIVE: In this study we extended earlier work to compare the effects of fornix DBS on evoked potentials (EPs) and local field potential (LFP) activity within the hippocampus, and to assess closed-loop stimulation...
September 6, 2017: Brain Stimulation
https://www.readbyqxmd.com/read/28713248/deep-brain-magnetic-stimulation-promotes-neurogenesis-and-restores-cholinergic-activity-in-a-transgenic-mouse-model-of-alzheimer-s-disease
#13
Junli Zhen, Yanjing Qian, Jian Fu, Ruijun Su, Haiting An, Wei Wang, Yan Zheng, Xiaomin Wang
Alzheimer's disease (AD) is characterized by progressive decline of memory and cognitive functions. Deep magnetic stimulation (DMS), a noninvasive and nonpharmacological brain stimulation, has been reported to alleviate stress-related cognitive impairment in neuropsychiatric disorders. Our previous study also discovered the preventive effect of DMS on cognitive decline in an AD mouse model. However, the underlying mechanism must be explored further. In this study, we investigated the effect of DMS on spatial learning and memory functions, neurogenesis in the dentate gyrus (DG), as well as expression and activity of the cholinergic system in a transgenic mouse model of AD (5XFAD)...
2017: Frontiers in Neural Circuits
https://www.readbyqxmd.com/read/28696431/synaptic-activity-protects-against-ad-and-ftd-like-pathology-via-autophagic-lysosomal-degradation
#14
Y Akwa, E Gondard, A Mann, E Capetillo-Zarate, E Alberdi, C Matute, S Marty, T Vaccari, A M Lozano, E E Baulieu, D Tampellini
Changes in synaptic excitability and reduced brain metabolism are among the earliest detectable alterations associated with the development of Alzheimer's disease (AD). Stimulation of synaptic activity has been shown to be protective in models of AD beta-amyloidosis. Remarkably, deep brain stimulation (DBS) provides beneficial effects in AD patients, and represents an important therapeutic approach against AD and other forms of dementia. While several studies have explored the effect of synaptic activation on beta-amyloid, little is known about Tau protein...
July 11, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/28653404/neuroanatomical-characteristics-associated-with-response-to-deep-brain-stimulation-of-the-nucleus-basalis-of-meynert-for-alzheimer-s-disease
#15
Juan Carlos Baldermann, Katja Hardenacke, Xiaochen Hu, Phillip Köster, Andreas Horn, Hans-Joachim Freund, Karl Zilles, Volker Sturm, Veerle Visser-Vandewalle, Frank Jessen, David Maintz, Jens Kuhn
OBJECTIVES: First reports on the application of deep brain stimulation (DBS) of the Nucleus basalis of Meynert (NBM) showed feasibility and safety of the intervention in patients with Alzheimer´s disease. However, clinical effects vary and the mechanisms of actions are still not well understood. The aim of this study was to characterize neuroimaging changes that are associated with the responsiveness to the treatment. MATERIALS AND METHODS: We examined preoperative T1-weighted MR images of ten patients with Alzheimer's disease (AD) treated with DBS of the NBM and correlated the clinical outcome with volumetric differences of cortical thickness...
February 2018: Neuromodulation: Journal of the International Neuromodulation Society
https://www.readbyqxmd.com/read/28540926/entorhinal-cortical-deep-brain-stimulation-rescues-memory-deficits-in-both-young-and-old-mice-genetically-engineered-to-model-alzheimer-s-disease
#16
Frances Xia, Adelaide Yiu, Scellig S D Stone, Soojin Oh, Andres M Lozano, Sheena A Josselyn, Paul W Frankland
Alzheimer's disease (AD) is a neurodegenerative disorder characterized by progressive cognitive decline. Deep brain stimulation (DBS) has been used to treat a variety of brain disorders and shows promise in alleviating cognitive symptoms in some AD patients (Laxton et al, 2010). We previously showed that DBS of the entorhinal cortex (EC) enhances spatial memory formation in normal (wild-type) mice (Stone et al, 2011). Here we tested the effects of EC-DBS on the progressive cognitive deficits in a genetically-based mouse model of AD...
December 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28436389/ethical-considerations-for-deep-brain-stimulation-trials-in-patients-with-early-onset-alzheimer-s-disease
#17
REVIEW
John Noel M Viaña, Merlin Bittlinger, Frederic Gilbert
Several studies of deep brain stimulation (DBS) of the fornix or the nucleus basalis of Meynert have been recently conducted in people with Alzheimer's disease, with several recruiting participants <65 and thus have early-onset Alzheimer's disease (EOAD). Although EOAD accounts for less than 5.5% of AD cases, ethical considerations must still be made when performing DBS trials including these participants since a portion of people with EOAD, especially those possessing autosomal-dominant mutations, have an atypical and more aggressive disease progression...
2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28385550/currents-of-memory-recent-progress-translational-challenges-and-ethical-considerations-in-fornix-deep-brain-stimulation-trials-for-alzheimer-s-disease
#18
REVIEW
John Noel M Viaña, James C Vickers, Mark J Cook, Frederic Gilbert
The serendipitous discovery of triggered autobiographical memories and eventual memory improvement in an obese patient who received fornix deep brain stimulation in 2008 paved the way for several phase I and phase II clinical trials focused on the safety and efficacy of this potential intervention for people with Alzheimer's disease. In this article, we summarize clinical trials and case reports on fornix deep brain stimulation for Alzheimer's disease and review experiments on animal models evaluating the physiological or behavioral effects of this intervention...
August 2017: Neurobiology of Aging
https://www.readbyqxmd.com/read/28304293/coordinate-based-meta-analysis-of-the-default-mode-and-salience-network-for-target-identification-in-non-invasive-brain-stimulation-of-alzheimer-s-disease-and-behavioral-variant-frontotemporal-dementia-networks
#19
Michela Pievani, Lorenzo Pini, Clarissa Ferrari, Francesca B Pizzini, Ilaria Boscolo Galazzo, Chiara Cobelli, Maria Cotelli, Rosa Manenti, Giovanni B Frisoni
BACKGROUND: The accurate choice of the site of non-invasive brain stimulation (NIBS) is an important factor in trial design. OBJECTIVE: Based on the observation that Alzheimer's disease (AD) and behavioral frontotemporal dementia (bvFTD) affect specific large-scale networks, i.e., the default mode network (DMN) and the salience network (SN), respectively, we aimed to identify population-average coordinates of these networks that could be used as potential targets in NIBS trials aiming to modulate these circuits...
2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28175430/deep-brain-stimulation-of-the-fornix-engaging-therapeutic-circuits-and-networks-in-alzheimer-disease
#20
Nathan C Rowland, Francesco Sammartino, Jennifer C Tomaszczyk, Andres M Lozano
No abstract text is available yet for this article.
August 1, 2016: Neurosurgery
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