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https://www.readbyqxmd.com/read/29150992/accelerated-aging-and-aging-process-in-the-brain
#1
Nickolay K Isaev, Elisaveta E Genrikhs, Maria V Oborina, Elena V Stelmashook
One of the approaches to the research of the problem of aging is the study of genetic pathologies leading to accelerated aging, such as the Hutchinson-Gilford progeria syndrome, Werner syndrome, and Down syndrome. Probably, this approach can be used in an attempt to understand the neuronal mechanisms underlying normal and pathological brain aging. The analysis of the current state of scientific knowledge about these pathologies shows that in the Hutchinson-Gilford progeria and Werner syndrome, the rate of brain aging is significantly lower than the rate of whole body aging, whereas in Down syndrome, the brain ages faster than other organs due to amyloid-beta accumulation and chronic oxidative stress in the brain tissue...
November 18, 2017: Reviews in the Neurosciences
https://www.readbyqxmd.com/read/29150951/inflammasome-its-role-in-traumatic-brain-and-spinal-cord-injury
#2
REVIEW
Keywan Mortezaee, Neda Khanlarkhani, Cordian Beyer, Adib Zendedel
Traumatic brain injury (TBI) and spinal cord injury (SCI) are pathological events that lead to neuropathological conditions which have in consequence the initiation of pro-inflammatory cytokine production. Neuroinflammation plays a key role in the secondary phase of both TBI and SCI after initial cell death. Activation of cytoplasmic inflammasome complexes is regarded as the essential step of neuroinflammation and a key trigger for neuronal death called pyroptosis. Inflammasome complexes are involved in activation of caspase-1 which catalyzes the cleavage of pro-interleukins into their active forms (including interleukin-18 (IL-18) and IL-1β)...
November 18, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29150901/expression-of-the-clock-gene-rev-erb%C3%AE-in-the-brain-controls-the-circadian-organization-of-food-intake-and-locomotor-activity-but-not-daily-variations-of-energy-metabolism
#3
Satish Sen, Stéphanie Dumont, Dominique Sage-Ciocca, Sophie Reibel, Paul de Goede, Andries Kalsbeek, Etienne Challet
The nuclear receptor REV-ERBα is part of the molecular clock mechanism and thought to be involved in a variety of biological processes within metabolically active peripheral tissues as well. To investigate whether Rev-erbα (also known as Nr1d1) in the brain plays a role in the daily variations of energy metabolism, feeding behaviour and the sleep-wake cycle, we studied mice with global (GKO) or brain (BKO) deletion of Rev-erbα. Mice were studied both in a light-dark cycle and constant darkness, and 24-h variations of Respiratory quotient (RQ) and energy expenditure, as well as the temporal patterns of rest-activity and feeding behavior were recorded...
November 18, 2017: Journal of Neuroendocrinology
https://www.readbyqxmd.com/read/29150884/directional-local-field-potentials-a-tool-to-optimize-deep-brain-stimulation
#4
Gerd Tinkhauser, Alek Pogosyan, Ines Debove, Andreas Nowacki, Syed Ahmar Shah, Kathleen Seidel, Huiling Tan, John-Stuart Brittain, Katrin Petermann, Lazzaro di Biase, Markus Oertel, Claudio Pollo, Peter Brown, Michael Schuepbach
BACKGROUND: Although recently introduced directional DBS leads provide control of the stimulation field, programing is time-consuming. OBJECTIVES: Here, we validate local field potentials recorded from directional contacts as a predictor of the most efficient contacts for stimulation in patients with PD. METHODS: Intraoperative local field potentials were recorded from directional contacts in the STN of 12 patients and beta activity compared with the results of the clinical contact review performed after 4 to 7 months...
November 18, 2017: Movement Disorders: Official Journal of the Movement Disorder Society
https://www.readbyqxmd.com/read/29150860/quality-of-life-outcomes-after-subthalamic-stimulation-in-parkinson-s-disease-depends-on-age
#5
Haidar S Dafsari, Paul Reker, Lisa Stalinski, Monty Silverdale, Alexandra Rizos, Keyoumars Ashkan, Michael T Barbe, Gereon R Fink, Julian Evans, Julia Steffen, Michael Samuel, Till A Dembek, Veerle Visser-Vandewalle, Angelo Antonini, K Ray-Chaudhuri, Pablo Martinez-Martin, Lars Timmermann
OBJECTIVE: The purpose of this study was to investigate how quality of life outcome after bilateral subthalamic nucleus (STN) deep brain stimulation (DBS) in Parkinson's disease (PD) depends on age. METHODS: In this prospective, open-label, multicenter study including 120 PD patients undergoing bilateral STN-DBS, we investigated the PDQuestionnaire-8 (PDQ-8), Unified PD Rating Scale-III, Scales for Outcomes in PD-motor examination, complications, activities of daily living, and levodopa equivalent daily dose preoperatively and at 5 months follow-up...
November 18, 2017: Movement Disorders: Official Journal of the Movement Disorder Society
https://www.readbyqxmd.com/read/29150777/glibenclamide-and-therapeutic-hypothermia-have-comparable-effect-on-attenuating-global-cerebral-edema-following-experimental-cardiac-arrest
#6
Shin Nakayama, Noriko Taguchi, Yumi Isaka, Takako Nakamura, Makoto Tanaka
BACKGROUND: Cerebral edema is one of the major causes of mortality following cardiac arrest (CA) and cardiopulmonary resuscitation (CPR). A subunit of the sulfonylurea receptor 1-transient receptor potential M4 (Sur1-TRPM4) channel has been implicated in the pathogenesis of ischemia-evoked cerebral edema. In this study, we examined whether glibenclamide (GBC), a Sur1-TRPM4 channel inhibitor, attenuates cerebral edema following CA/CPR and further examined the efficacy of GBC combined with therapeutic hypothermia...
November 17, 2017: Neurocritical Care
https://www.readbyqxmd.com/read/29150743/differential-response-of-neural-cells-to-trauma-induced-swelling-in-vitro
#7
A R Jayakumar, M Taherian, K S Panickar, N Shamaladevi, M E Rodriguez, B G Price, M D Norenberg
Brain edema and the associated increase in intracranial pressure are major consequences of traumatic brain injury (TBI) that accounts for most early deaths after TBI. We recently showed that acute severe trauma to cultured astrocytes results in cell swelling. We further examined whether trauma induces cell swelling in neurons and microglia. We found that severe trauma also caused cell swelling in cultured neurons, whereas no swelling was observed in microglia. While severe trauma caused cell swelling in both astrocytes and neurons, mild trauma to astrocytes, neurons, and microglia failed to cell swelling...
November 17, 2017: Neurochemical Research
https://www.readbyqxmd.com/read/29150726/tspo-imaging-using-the-novel-pet-ligand-18-f-ge-180-quantification-approaches-in-patients-with-multiple-sclerosis
#8
Lena Vomacka, Nathalie Lisa Albert, Simon Lindner, Marcus Unterrainer, Christoph Mahler, Matthias Brendel, Larissa Ermoschkin, Astrid Gosewisch, Anika Brunegraf, Christopher Buckley, Tania Kümpfel, Rainer Rupprecht, Sibylle Ziegler, Martin Kerschensteiner, Peter Bartenstein, Guido Böning
BACKGROUND: PET ligands targeting the translocator protein (TSPO) represent promising tools to visualise neuroinflammation. Here, we analysed parameters obtained in dynamic and static PET images using the novel TSPO ligand [(18)F]GE-180 in patients with relapsing remitting multiple sclerosis (RRMS) and an approach for semi-quantitative assessment of this disease in clinical routine. Seventeen dynamic [(18)F]GE-180 PET scans of RRMS patients were evaluated (90 min). A pseudo-reference region (PRR) was defined after identification of the least disease-affected brain area by voxel-based comparison with six healthy controls (HC) and upon exclusion of voxels suspected of being affected in static 60-90 min p...
October 26, 2017: EJNMMI Research
https://www.readbyqxmd.com/read/29150679/dynamics-of-high-frequency-brain-activity
#9
Steven X Moffett, Sean M O'Malley, Shushuang Man, Dawei Hong, Joseph V Martin
Evidence suggests that electroencephalographic (EEG) activity extends far beyond the traditional frequency range. Much of the prior study of >120 Hz EEG is in epileptic brains. In the current work, we measured EEG activity in the range of 200 to 2000 Hz, in the brains of healthy, spontaneously behaving rats. Both arrhythmic (1/f-type) and rhythmic (band) activities were identified and their properties shown to depend on EEG-defined stage of sleep/wakefulness. The inverse power law exponent of 1/f-type noise is shown to decrease from 3...
November 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29150630/inhibition-of-myeloid-differentiation-primary-response-protein-88-provides-neuroprotection-in-early-brain-injury-following-experimental-subarachnoid-hemorrhage
#10
Huiying Yan, Dingding Zhang, Yongxiang Wei, Hongbin Ni, Weibang Liang, Huasheng Zhang, Shuangying Hao, Wei Jin, Kuanyu Li, Chun-Hua Hang
Accumulating of evidence suggests that activation of nuclear factor-kappa B (NF-κB) and mitogen-activated protein kinases (MAPKs) exacerbates early brain injury (EBI) following subarachnoid hemorrhage (SAH) by provoking pro-inflammatory and pro-apoptotic signaling. Myeloid differentiation primary response protein 88 (MyD88) is an endogenous adaptor protein in the toll-like receptors (TLRs) and interleukin (IL) -1β family signaling pathways and acts as a bottle neck in the NF-κB and MAPK pathways. Here, we used ST2825, a selective inhibitor of MyD88, to clarify whether inhibiting MyD88 could provide neuroprotection in EBI following SAH...
November 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29150595/notch1-signaling-activation-contributes-to-adult-hippocampal-neurogenesis-following-traumatic-brain-injury
#11
Ming Tu, Penglei Zhu, Shaobo Hu, Wei Wang, Zhipeng Su, Jiaqing Guan, Chongran Sun, Weiming Zheng
BACKGROUND Neural stem cells are reported to exist in the hippocampus of adult mammals and are important sources of neurons for repair. The Notch1 signaling pathway is considered as one of the important regulators of neural stem cells, but its role in adult brains is unclear. We aimed to describe the role of Notch1 signaling in the adult rat hippocampus after traumatic brain injury. MATERIAL AND METHODS The model rats were randomly divided into 4 groups as follows: sham, sham-TBI, sham-Ad-TBI, and NICD-Ad-TBI...
November 18, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/29150274/neuroprotective-potential-of-high-dose-biotin
#12
Mark F McCarty, James J DiNicolantonio
A recent controlled trial has established that high-dose biotin supplementation - 100 mg, three times daily - has a stabilizing effect on progression of multiple sclerosis (MS). Although this effect has been attributed to an optimization of biotin's essential cofactor role in the brain, a case can be made that direct stimulation of soluble guanylate cyclase (sGC) by pharmacological concentrations of biotin plays a key role in this regard. The utility of high-dose biotin in MS might reflect an anti-inflammatory effect of cGMP on the cerebral microvasculature, as well on oligodendrocyte differentiation and on Schwann cell production of neurotrophic factors thought to have potential for managing MS...
November 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/29150182/mature-hippocampal-neurons-require-lis1-for-synaptic-integrity-implications-for-cognition
#13
Anamaria Sudarov, Xin-Jun Zhang, Leighton Braunstein, Eve LoCastro, Shawn Singh, Yu Taniguchi, Ashish Raj, Song-Hai Shi, Holly Moore, M Elizabeth Ross
BACKGROUND: Platelet-activating factor acetylhydrolase 1B1 (LIS1), a critical mediator of neuronal migration in developing brain, is expressed throughout life. However, relatively little is known about LIS1 function in the mature brain. We previously demonstrated that LIS1 involvement in the formation and turnover of synaptic protrusions and synapses of young brain after neuronal migration is complete. Here we examine the requirement for LIS1 to maintain hippocampal circuit function in adulthood...
September 23, 2017: Biological Psychiatry
https://www.readbyqxmd.com/read/29150145/neuroimaging-biomarkers-as-predictors-of-treatment-outcome-in-major-depressive-disorder
#14
REVIEW
Trehani M Fonseka, Glenda M MacQueen, Sidney H Kennedy
BACKGROUND: Current practice for selecting pharmacological and non-pharmacological antidepressant treatments has yielded low response and remission rates in Major Depressive Disorder (MDD). Neuroimaging biomarkers of brain structure and function may be useful in guiding treatment selection by predicting response vs. non-response outcomes. METHODS: In this review, we summarize data from studies examining predictors of treatment response using structural and functional neuroimaging modalities, as they pertain to pharmacotherapy, psychotherapy, and stimulation treatment strategies...
October 31, 2017: Journal of Affective Disorders
https://www.readbyqxmd.com/read/29150051/glutamate-is-down-regulated-and-tinnitus-loudness-levels-decreased-following-rtms-over-auditory-cortex-of-the-left-hemisphere-a-prospective-randomized-single-blinded-sham-controlled-cross-over-study
#15
Anthony T Cacace, Jiani Hu, Stephen Romero, Yang Xuan, Robert F Burkard, Richard S Tyler
Using a prospective randomized single-blinded sham-controlled cross-over design, we studied the efficacy of low frequency (1-Hz) repetitive transcranial magnetic stimulation (rTMS) over auditory cortex of the left temporal lobe as an experimental treatment modality for noise-induced tinnitus. Pre/post outcome measures for sham vs. active rTMS conditions included differential changes in tinnitus loudness, self-perceived changes in the Tinnitus Handicap Questionnaire (THQ), and neurochemical changes of brain metabolite concentrations using single voxel proton magnetic resonance spectroscopy ((1)H-MRS) obtained from left and right auditory cortical areas...
November 14, 2017: Hearing Research
https://www.readbyqxmd.com/read/29149948/knowledge-and-attitudes-toward-organ-donation-in-health-care-undergraduate-students-in-italy
#16
F Fontana, M Massari, L Giovannini, G Alfano, G Cappelli
INTRODUCTION: The number of organ donors in Italy is increasing, but with still disappointing living donation activity and relatively frequent objection by potential deceased donors' relatives to organ recovery. Few studies have assessed health care students' knowledge and attitude on donation. METHODS: We administered a questionnaire to medical (MS) and nursing students (NS) at University of Modena and Reggio Emilia, Italy, and 749 students (406 MS and 343 NS) completed the questionnaire...
November 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/29149810/exacerbation-of-acute-traumatic-brain-injury-by-circulating-extracellular-vesicles
#17
Isla Hazleton, Abi Yates, Ashley Dale, Jay Roodselaar, Naveed Akbar, Marc Ruitenberg, Daniel C Anthony, Yvonne Couch
Inflammatory lesions in the brain activate a systemic acute phase response (APR), which is dependent on the release of extracellular vesicles (EVs) into the circulation. The resulting APR is responsible for regulating leukocyte mobilization and subsequent recruitment to the brain. Factors that either exacerbate or inhibit the APR will also exacerbate or inhibit CNS inflammation as a consequence, and have the potential to influence ongoing secondary damage. Here, we were interested to discover how the circulating EV population changes after traumatic brain injury (TBI) and how manipulation of the circulating EV pool impacts on the outcome of TBI...
November 17, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/29149767/the-effects-of-sleep-on-the-neural-correlates-of-pattern-separation
#18
Christopher R Doxey, Cooper Hodges, Ty Bodily, Nathan M Muncy, C Brock Kirwan
Effective memory representations must be specific to prevent interference between episodes that may overlap in terms of place, time, or items present. Pattern separation, a computational process performed by the hippocampus, overcomes this interference by establishing non-overlapping memory representations. Although it is widely accepted that declarative memories are consolidated during sleep, the effects of sleep on pattern separation have yet to be elucidated. We used whole-brain, high-resolution functional neuroimaging to investigate the effects of sleep on a task that places high demands on pattern separation...
November 17, 2017: Hippocampus
https://www.readbyqxmd.com/read/29149617/decoding-early-and-late-cortical-contributions-to-individuation-of-attended-and-unattended-objects
#19
Claire K Naughtin, Jason B Mattingley, Angela D Bender, Paul E Dux
To isolate a visual stimulus as a unique object with a specific spatial location and time of occurrence, it is necessary to first register (individuate) the stimulus as a distinct perceptual entity. Recent investigations into the neural substrates of object individuation have suggested it is subserved by a distributed neural network, but previous manipulations of individuation load have introduced extraneous visual confounds, which might have yielded ambiguous findings, particularly in early cortical areas...
November 8, 2017: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/29149393/challenges-in-minor-tbi-and-indications-for-head-ct-in-pediatric-tbi-an-update
#20
Navneet Singh, Ash Singhal
INTRODUCTION: Pediatric head trauma is one of the commonest presentations to emergency departments. Over 90% of such head injuries are considered mild, but still present risk acute clinical deterioration and longer term morbidity. Identifying which children are at risk of clinically important brain injuries remains challenging and much of the data on minor head injuries is based on the adult population. CHALLENGES IN PEDIATRICS: Children, however, are different, both anatomically and in terms of mechanism of injury, to adults and, even within the pediatric group, there are differences with age and stage of development...
October 2017: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
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