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https://www.readbyqxmd.com/read/28550264/depressive-symptoms-are-associated-with-progression-to-dementia-in-patients-with-amyloid-positive-mild-cognitive-impairment
#1
Byungseung Moon, Seongheon Kim, Young Ho Park, Jae-Sung Lim, Young Chul Youn, Sang Yun Kim, Jae-Won Jang
BACKGROUND: Depressive symptoms are prevalent in patients with mild cognitive impairment (MCI) and are considered to be a risk factor for progression to dementia. OBJECTIVE: The purpose of this study was to evaluate whether depressive symptoms in MCI promote disease progression in a manner related to amyloid status, and to determine the relationship between depressive symptoms and longitudinal cerebral structural changes. METHODS: Baseline data for 336 patients with MCI (75 with depression and 261 without) from the Alzheimer's Disease Neuroimaging Initiative study were analyzed...
May 26, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28550257/increasing-body-mass-index-at-midlife-is-associated-with-increased-cortical-thinning-in-alzheimer-s-disease-vulnerable-regions
#2
Marnie E Shaw, Walter P Abhayaratna, Kaarin J Anstey, Nicolas Cherbuin
Higher body mass index (BMI) at midlife is associated with greater decreases in cognitive function at older age as well as increased Alzheimer's disease (AD) risk, compared to those with normal BMI. Here, we tested whether BMI at midlife was associated with cortical thinning in brain regions known to be affected in early AD. We examined a large sample (n = 404) of midlife individuals (44-49 years) from the PATH population-based study. Individuals were scanned with magnetic resonance imaging (1.5T) on up to three occasions over eight years...
May 26, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28549317/frontal-and-subcortical-grey-matter-reductions-in-ptsd
#3
Daniel C M O'Doherty, Ashleigh Tickell, Will Ryder, Charles Chan, Daniel F Hermens, Maxwell R Bennett, Jim Lagopoulos
Post-traumatic stress disorder (PTSD) is characterised by a range of debilitating psychological, physical and cognitive symptoms. PTSD has been associated with grey matter atrophy in limbic and frontal cortical brain regions. However, previous studies have reported heterogeneous findings, with grey matter changes observed beyond limbic/frontal areas. Seventy-five adults were recruited from the community, 25 diagnosed with PTSD along with 25 healthy and 25 trauma exposed age and gender matched controls. Participants underwent clinical assessment and magnetic resonance imaging...
May 19, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28548945/soluble-antigens-from-the-neurotropic-pathogen-angiostrongylus-cantonensis-directly-induce-thymus-atrophy-in-a-mouse-model
#4
Zhen Liu, Dong-Ming Su, Zi-Long Yu, Feng Wu, Rui-Feng Liu, Shi-Qi Luo, Zhi-Yue Lv, Xin Zeng, Xi Sun, Zhong-Dao Wu
The nematode Angiostrongylus cantonensis (A.C.) is a neurotropic pathogen; stage-III larva invade the human (non-permissive host) central nervous system (CNS) to cause eosinophilic meningitis or meningoencephalitis accompanied by immunosuppression. In an A.C.-infectedmouse (another non-permissive host) model, CNS damage-associated T cell immune deficiency and severe inflammation were proposed to result from activation of the hypothalamic-pituitary-adrenal (HPA) axis. However, glucocorticoids are anti-inflammatory agents...
May 12, 2017: Oncotarget
https://www.readbyqxmd.com/read/28546108/corrigendum-to-cortical-complexity-as-a-measure-of-age-related-brain-atrophy-neuroimage-134-2016-617-629
#5
Christopher R Madan, Elizabeth A Kensinger
No abstract text is available yet for this article.
May 22, 2017: NeuroImage
https://www.readbyqxmd.com/read/28545932/the-association-between-tau-pet-and-retrospective-cortical-thinning-in-clinically-normal-elderly
#6
Molly R LaPoint, Jasmeer P Chhatwal, Jorge Sepulcre, Keith A Johnson, Reisa A Sperling, Aaron P Schultz
Tau pathology has been associated with neuronal loss at autopsy, but the temporal evolution of tau pathology and atrophy remains unclear. Here, we investigate the association between cross-sectional AV-1451-PET as a marker of tau pathology and cortical thickness cross-sectionally. We also investigated retrospective rates of cortical thinning over the three years preceding the AV-1451 scan in a clinically normal cohort of 103 older adults from the Harvard Aging Brain Study. Tau measurements were Geometric Transfer Matrix partial volume corrected standardized uptake value ratios (SUVRs) with a cerebellar grey reference region...
May 22, 2017: NeuroImage
https://www.readbyqxmd.com/read/28543952/structural-signature-of-classical-versus-late-onset-friedreich-s-ataxia-by-multimodality-brain-mri
#7
Thiago Junqueira R Rezende, Alberto Rolim M Martinez, Ingrid Faber, Karen Girotto, José Luiz Pedroso, Orlando G Barsottini, Iscia Lopes-Cendes, Fernando Cendes, Andreia V Faria, Marcondes C França
INTRODUCTION: Friedreich's ataxia (FRDA) is the most common autosomal-recessive ataxia worldwide. It is characterized by early onset, sensory abnormalities, and slowly progressive ataxia. However, some individuals manifest the disease after the age of 25 years and are classified as late-onset FRDA (LOFA). Therefore, we propose a transversal multimodal MRI-based study to investigate which anatomical substrates are involved in classical (cFRDA) and LOFA. METHODS: We enrolled 36 patients (13 with LOFA) and 29 healthy controls...
May 23, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/28542295/therapeutic-benefits-of-phosphodiesterase-4b-inhibition-after-traumatic-brain-injury
#8
Nicole M Wilson, Mark E Gurney, W Dalton Dietrich, Coleen M Atkins
Traumatic brain injury (TBI) initiates a deleterious inflammatory response that exacerbates pathology and worsens outcome. This inflammatory response is partially mediated by a reduction in cAMP and a concomitant upregulation of cAMP-hydrolyzing phosphodiesterases (PDEs) acutely after TBI. The PDE4B subfamily, specifically PDE4B2, has been found to regulate cAMP in inflammatory cells, such as neutrophils, macrophages and microglia. To determine if PDE4B regulates inflammation and subsequent pathology after TBI, adult male Sprague Dawley rats received sham surgery or moderate parasagittal fluid-percussion brain injury (2 ± 0...
2017: PloS One
https://www.readbyqxmd.com/read/28538071/bone-scrapers-versus-piezoelectric-surgery-in-the-lateral-antrostomy-for-sinus-floor-elevation
#9
Claudio Stacchi, Teresa Lombardi, Paolo Cusimano, Federico Berton, Floriana Lauritano, Gabriele Cervino, Roberto Di Lenarda, Marco Cicciù
The purpose of this investigation is to evaluate 2 different methods for reducing cortical wall thickness in sinus floor augmentation surgery. A manual bone scraper was compared in terms of efficacy, speed, and safety to an ultrasonic insert for osteoplasty, in a randomized controlled clinical trial with a split-mouth design. Twenty-five patients with severe posterior maxillary atrophy were treated with bilateral sinus floor elevation with lateral approach. Antrostomies were randomly performed by eroding the cortical wall with a manual bone scraper (test site) or with an ultrasonic insert (control site) until the membrane was visible under a thin layer of bone, before outlining the window with a piezoelectric device...
May 19, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28536518/mri-visual-ratings-of-brain-atrophy-and-white-matter-hyperintensities-across-the-spectrum-of-cognitive-decline-are-differently-affected-by-age-and-diagnosis
#10
Hanneke F M Rhodius-Meester, Marije R Benedictus, Mike P Wattjes, Frederik Barkhof, Philip Scheltens, Majon Muller, Wiesje M van der Flier
Aim: To assess the associations of age and diagnosis with visual ratings of medial temporal lobe atrophy (MTA), parietal atrophy (PA), global cortical atrophy (GCA), and white matter hyperintensities (WMH) and to investigate their clinical value in a large memory clinic cohort. Methods: We included 2,934 patients (age 67 ± 9 years; 1,391 [47%] female; MMSE 24 ± 5) from the Amsterdam Dementia Cohort (1,347 dementia due to Alzheimer's disease [AD]; 681 mild cognitive impairment [MCI]; 906 controls with subjective cognitive decline)...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/28532646/the-novel-psen1-m84v-mutation-associated-to-frontal-dysexecutive-syndrome-spastic-paraparesis-and-cerebellar-atrophy-in-a-dominant-alzheimer-s-disease-family
#11
Maura Gallo, Francesca Frangipane, Chiara Cupidi, Matteo De Bartolo, Sabina Turone, Camilla Ferrari, Benedetta Nacmias, Giuliana Grimaldi, Valentina Laganà, Rosanna Colao, Livia Bernardi, Maria Anfossi, Maria Elena Conidi, Franca Vasso, Sabrina Anna Maria Curcio, Maria Mirabelli, Nicoletta Smirne, Giusi Torchia, Maria Gabriella Muraca, Gianfranco Puccio, Raffaele Di Lorenzo, Maristella Piccininni, Andrea Tedde, Raffaele Giovanni Maletta, Sandro Sorbi, Amalia Cecilia Bruni
We identified the novel PSEN1 pathogenic mutation M84V in 3 patients belonging to a large kindred affected by autosomal dominant Alzheimer's disease (AD). The clinical phenotype was characterized by early onset dementia in 14 affected subjects over 3 generations. Detailed clinical, imaging and genetic assessment was performed. We highlighted the presence of unusual symptoms such as frontal executive syndrome, psychosis and spastic paraparesis in these patients. Spastic paraparesis has been reported in other PSEN1 mutations in adjacent codons, suggesting that the position of the genetic defect may affect the clinical expression, although this phenotype can occur in mutations throughout the whole PSEN1 gene...
April 27, 2017: Neurobiology of Aging
https://www.readbyqxmd.com/read/28527575/coup-tf-genes-human-diseases-and-the-development-of-the-central-nervous-system-in-murine-models
#12
Xiong Yang, Su Feng, Ke Tang
COUP-TFI and -TFII are members of the steroid/thyroid nuclear receptor superfamily. Recent clinical studies reveal that COUP-TFI gene mutations are associated with Bosch-Boonstra-Schaaf optic atrophy syndrome displaying symptoms of optic atrophy, intellectual disability, hypotonia, seizure, autism spectrum disorders, oromotor dysfunction, thin corpus callosum, or hearing defects, and COUP-TFII gene mutations lead to congenital heart defects and/or congenital diaphragmatic hernia with developmental delay and mental defects...
2017: Current Topics in Developmental Biology
https://www.readbyqxmd.com/read/28520803/multiple-modality-biomarker-prediction-of-cognitive-impairment-in-prospectively-followed-de-novo-parkinson-disease
#13
Chelsea Caspell-Garcia, Tanya Simuni, Duygu Tosun-Turgut, I-Wei Wu, Yu Zhang, Mike Nalls, Andrew Singleton, Leslie A Shaw, Ju-Hee Kang, John Q Trojanowski, Andrew Siderowf, Christopher Coffey, Shirley Lasch, Dag Aarsland, David Burn, Lana M Chahine, Alberto J Espay, Eric D Foster, Keith A Hawkins, Irene Litvan, Irene Richard, Daniel Weintraub
OBJECTIVES: To assess the neurobiological substrate of initial cognitive decline in Parkinson's disease (PD) to inform patient management, clinical trial design, and development of treatments. METHODS: We longitudinally assessed, up to 3 years, 423 newly diagnosed patients with idiopathic PD, untreated at baseline, from 33 international movement disorder centers. Study outcomes were four determinations of cognitive impairment or decline, and biomarker predictors were baseline dopamine transporter (DAT) single photon emission computed tomography (SPECT) scan, structural magnetic resonance imaging (MRI; volume and thickness), diffusion tensor imaging (mean diffusivity and fractional anisotropy), cerebrospinal fluid (CSF; amyloid beta [Aβ], tau and alpha synuclein), and 11 single nucleotide polymorphisms (SNPs) previously associated with PD cognition...
2017: PloS One
https://www.readbyqxmd.com/read/28520686/clinical-correlates-to-assist-with-chronic-traumatic-encephalopathy-diagnosis-insights-from-a-novel-rodent-repeat-concussion-model
#14
Gretchen M Thomsen, Ara Ko, Megan Y Harada, Annie Ma, Livia Wyss, Patricia Haro, Jean-Philippe Vit, Pablo Avalos, Navpreet K Dhillon, Noell Cho, Oksana Shelest, Eric J Ley
INTRODUCTION: Chronic traumatic encephalopathy (CTE) is a neurodegenerative disease linked to repetitive head injuries. Chronic traumatic encephalopathy symptoms include changes in mood, behavior, cognition, and motor function; however, CTE is currently diagnosed only postmortem. Using a rat model of recurrent traumatic brain injury (TBI), we demonstrate rodent deficits that predict the severity of CTE-like brain pathology. METHODS: Bilateral, closed-skull, mild TBI was administered once per week to 35 wild-type rats; eight rats received two injuries (2×TBI), 27 rats received five injuries (5×TBI), and 13 rats were sham controls...
June 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28516033/the-impact-of-large-structural-brain-changes-in-chronic-stroke-patients-on-the-electric-field-caused-by-transcranial-brain-stimulation
#15
Sena Minjoli, Guilherme B Saturnino, Jakob Udby Blicher, Charlotte J Stagg, Hartwig R Siebner, André Antunes, Axel Thielscher
Transcranial magnetic stimulation (TMS) and transcranial direct current stimulation (TDCS) are two types of non-invasive transcranial brain stimulation (TBS). They are useful tools for stroke research and may be potential adjunct therapies for functional recovery. However, stroke often causes large cerebral lesions, which are commonly accompanied by a secondary enlargement of the ventricles and atrophy. These structural alterations substantially change the conductivity distribution inside the head, which may have potentially important consequences for both brain stimulation methods...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28512507/homonymous-hemianopsia-due-to-posterior-cortical-atrophy
#16
Francesco Pellegrini, Andrew G Lee, Pietro Zucchetta
A 63-year-old woman presented to her ophthalmologist complaining of reading difficulties for two years. Ophthalmological examination revealed a homonymous hemianopsia. Brain magnetic resonance imaging (MRI) scan was interpreted as normal, but positron emission tomography (PET) showed areas of posterior brain hypometabolism. This case highlights the high diagnostic suspicion that ophthalmologists should have regarding posterior cortical atrophy (including the visual variant of Alzheimer disease) in patients complaining of reading difficulties in the setting of a normal ophthalmic examination...
June 2017: Neuro-ophthalmology
https://www.readbyqxmd.com/read/28511918/molecular-imaging-of-serotonin-degeneration-in-mild-cognitive-impairment
#17
Gwenn S Smith, Frederick S Barrett, Jin Hui Joo, Najlla Nassery, Alena Savonenko, Devin J Sodums, Christopher M Marano, Cynthia A Munro, Jason Brandt, Michael A Kraut, Yun Zhou, Dean F Wong, Clifford I Workman
Neuropathological and neuroimaging studies have consistently demonstrated degeneration of monoamine systems, especially the serotonin system, in normal aging and Alzheimer's disease. The evidence for degeneration of the serotonin system in mild cognitive impairment is limited. Thus, the goal of the present study was to measure the serotonin transporter in vivo in mild cognitive impairment and healthy controls. The serotonin transporter is a selective marker of serotonin terminals and of the integrity of serotonin projections to cortical, subcortical and limbic regions, as well as the cell bodies of origin (raphe nuclei)...
May 13, 2017: Neurobiology of Disease
https://www.readbyqxmd.com/read/28505968/inflammation-amyloid-and-atrophy-in-the-aging-brain-relationships-with-longitudinal-changes-in-cognition
#18
Roser Sala-Llonch, Ane-Victoria Idland, Tom Borza, Leiv Otto Watne, Torgeir Bruun Wyller, Anne Brækhus, Henrik Zetterberg, Kaj Blennow, Kristine Beate Walhovd, Anders Martin Fjell
Amyloid deposition occurs in aging, even in individuals free from cognitive symptoms, and is often interpreted as preclinical Alzheimer's disease (AD) pathophysiology. YKL-40 is a marker of neuroinflammation, being increased in AD, and hypothesized to interact with amyloid-β (Aβ) in causing cognitive decline early in the cascade of AD pathophysiology. Whether and how Aβ and YKL-40 affect brain and cognitive changes in cognitively healthy older adults is still unknown. We studied 89 participants (mean age: 73...
May 8, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28501823/cerebellar-atrophy-in-neurodegeneration-a-meta-analysis
#19
REVIEW
Helena M Gellersen, Christine C Guo, Claire O'Callaghan, Rachel H Tan, Saber Sami, Michael Hornberger
INTRODUCTION: The cerebellum has strong cortical and subcortical connectivity, but is rarely taken into account for clinical diagnosis in many neurodegenerative conditions, particularly in the absence of clinical ataxia. The current meta-analysis aims to assess patterns of cerebellar grey matter atrophy in seven neurodegenerative conditions (Alzheimer's disease (AD), Parkinson's disease (PD) and Huntington's disease (HD), frontotemporal dementia (FTD), amyotrophic lateral sclerosis (ALS), multiple system atrophy (MSA), progressive supranuclear palsy (MSP))...
May 13, 2017: Journal of Neurology, Neurosurgery, and Psychiatry
https://www.readbyqxmd.com/read/28486817/altered-network-topology-in-patients-with-primary-brain-tumors-after-fractionated-radiotherapy
#20
Naeim Bahrami, Tyler M Seibert, Roshan Karunamuni, Hauke Bartsch, AnithaPriya Krishna, Nikdokht Farid, Jona A Hattangadi-Gluth, Carrie R McDonald
Radiation therapy (RT) is a critical treatment modality for patients with brain tumors, though it can cause adverse effects. Recent data suggests that brain RT is associated with dose-dependent cortical atrophy which could disrupt neocortical networks. This study examines whether brain RT affects structural network properties in brain tumor patients. We applied graph theory to MRI-derived cortical thickness estimates of 54 brain tumor patients before and after RT. Cortical surfaces were parcellated into 68 regions and correlation matrices were created for patients pre- and post-RT...
May 9, 2017: Brain Connectivity
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