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Hippocampal sclerosis

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https://www.readbyqxmd.com/read/28222339/everyday-memory-impairment-in-patients-with-temporal-lobe-epilepsy-caused-by-hippocampal-sclerosis
#1
Patrícia Rzezak, Ellen Marise Lima, Ana Carolina Gargaro, Erica Coimbra, Silvia de Vincentiis, Tonicarlo Rodrigues Velasco, João Pereira Leite, Geraldo F Busatto, Kette D Valente
OBJECTIVE: Patients with temporal lobe epilepsy caused by hippocampal sclerosis (TLE-HS) have episodic memory impairment. Memory has rarely been evaluated using an ecologic measure, even though performance on these tests is more related to patients' memory complaints. We aimed to measure everyday memory of patients with TLE-HS to age- and gender-matched controls. METHODS: We evaluated 31 patients with TLE-HS and 34 healthy controls, without epilepsy and psychiatric disorders, using the Rivermead Behavioral Memory Test (RBMT), Visual Reproduction (WMS-III) and Logical Memory (WMS-III)...
February 18, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/28205009/mixed-pathologies-including-chronic-traumatic-encephalopathy-account-for-dementia-in-retired-association-football-soccer-players
#2
Helen Ling, Huw R Morris, James W Neal, Andrew J Lees, John Hardy, Janice L Holton, Tamas Revesz, David D R Williams
In retired professional association football (soccer) players with a past history of repetitive head impacts, chronic traumatic encephalopathy (CTE) is a potential neurodegenerative cause of dementia and motor impairments. From 1980 to 2010, 14 retired footballers with dementia were followed up regularly until death. Their clinical data, playing career, and concussion history were prospectively collected. Next-of-kin provided consent for six to have post-mortem brain examination. Of the 14 male participants, 13 were professional and 1 was a committed amateur...
February 15, 2017: Acta Neuropathologica
https://www.readbyqxmd.com/read/28188918/evaluation-of-multimodal-segmentation-based-on-3d-t1-t2-and-flair-weighted-images-the-difficulty-of-choosing
#3
Tobias Lindig, Raviteja Kotikalapudi, Daniel Schweikardt, Pascal Martin, Friedemann Bender, Uwe Klose, Ulrike Ernemann, Niels K Focke, Benjamin Bender
Voxel-based morphometry is still mainly based on T1-weighted MRI scans. Misclassification of vessels and dura mater as gray matter has been previously reported. Goal of the present work was to evaluate the effect of multimodal segmentation methods available in SPM12, and their influence on identification of age related atrophy and lesion detection in epilepsy patients. 3D T1-, T2- and FLAIR-images of 77 healthy adults (mean age 35.8 years, 19-66 years, 45 females), 7 patients with malformation of cortical development (MCD) (mean age 28...
February 7, 2017: NeuroImage
https://www.readbyqxmd.com/read/28188677/5-hydroxytryptamine1a-receptor-density-in-the-hippocampus-of-patients-with-temporal-lobe-epilepsy-is-associated-with-disease-duration
#4
N C Fonseca, H P G Joaquim, L L Talib, S Vincentiis, W F Gattaz, K D Valente
BACKGROUND AND PURPOSE: To date, no study has evaluated the association between serotonin receptor density and clinical variables in patients with temporal lobe epilepsy caused by hippocampal sclerosis (TLE-HS) using hippocampal tissue. We evaluated 5-hydroxytryptamine1A receptor (5-HT1AR) density in hippocampal tissue from patients with TLE-HS. METHODS: We analyzed the hippocampal tissue of 34 patients with pharmacoresistant unilateral TLE-HS. 5-HT1AR density was measured using semiquantitative western blotting...
February 11, 2017: European Journal of Neurology: the Official Journal of the European Federation of Neurological Societies
https://www.readbyqxmd.com/read/28188304/-18-f-fdg-pet-patterns-of-surgical-success-and-failure-in-mesial-temporal-lobe-epilepsy
#5
Francine Chassoux, Eric Artiges, Franck Semah, Agathe Laurent, Elisabeth Landré, Baris Turak, Philippe Gervais, Badia-Ourkia Helal, Bertrand Devaux
OBJECTIVE: To search for [(18)F]-fluorodeoxyglucose (FDG)-PET patterns predictive of long-term prognosis in surgery for drug-resistant mesial temporal lobe epilepsy (MTLE) due to hippocampal sclerosis (HS). METHODS: We analyzed metabolic data with [(18)F]-FDG-PET in 97 patients with MTLE (53 female participants; age range 15-56 years) with unilateral HS (50 left) and compared the metabolic patterns, electroclinical features, and structural atrophy on MRI in patients with the best outcome after anteromesial temporal resection (Engel class IA, completely seizure-free) to those with a non-IA outcome, including suboptimal outcome and failure...
February 10, 2017: Neurology
https://www.readbyqxmd.com/read/28180076/face-name-association-task-reveals-memory-networks-in-patients-with-left-and-right-hippocampal-sclerosis
#6
Silke Klamer, Monika Milian, Michael Erb, Sabine Rona, Holger Lerche, Thomas Ethofer
We aimed to identify reorganization processes of episodic memory networks in patients with left and right temporal lobe epilepsy (TLE) due to hippocampal sclerosis as well as their relations to neuropsychological memory performance. We investigated 28 healthy subjects, 12 patients with left TLE (LTLE) and 9 patients with right TLE (RTLE) with hippocampal sclerosis by means of functional magnetic resonance imaging (fMRI) using a face-name association task, which combines verbal and non-verbal memory functions...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28169952/hippocampal-infusion-of-lipopolysaccharide-induces-immune-responses-and-results-in-seizures-in-rats
#7
Yanxiang Zhang, Xuwen Sun, Yu Nai, Maowen Ba, Qiang Fu, Fei Wu
Recent studies suggest that epileptic seizures might be facilitated by immune reactions in the brain. However, it remains unclear whether inflammatory reactions could result in acute and chronic epileptic seizures in vivo. In the present study, we investigated whether a hippocampal infusion of lipopolysaccharide (LPS) can induce epileptic seizures in rats. We also aimed to elucidate the molecular mechanisms that underpin this phenomenon. Male Wistar rats received a 1.5 μl infusion of either LPS (5 µg/μl), normal saline, or kainate (KA) (0...
March 1, 2017: Neuroreport
https://www.readbyqxmd.com/read/28160067/tau-aggregation-influences-cognition-and-hippocampal-atrophy-in-the-absence-of-beta-amyloid-a-clinico-imaging-pathological-study-of-primary-age-related-tauopathy-part
#8
Keith A Josephs, Melissa E Murray, Nirubol Tosakulwong, Jennifer L Whitwell, David S Knopman, Mary M Machulda, Stephen D Weigand, Bradley F Boeve, Kejal Kantarci, Leonard Petrucelli, Val J Lowe, Clifford R Jack, Ronald C Petersen, Joseph E Parisi, Dennis W Dickson
We investigate whether there is any association between the Braak neurofibrillary tangle (NFT) stage and clinical and MRI features in definite primary age-related tauopathy (PART). We analysed 52 cases with a Braak NFT tangle stage >0 and ≤IV, and a Thal phase of 0 (no beta-amyloid present). Twenty-nine (56%) were female. Median age at death was 88 years (IQR 82-92 years). Fifteen (29%) were TDP-positive (75% TDP stage I), 16 (31%) had argyrophilic grain disease and three (6%) had alpha-synuclein-positive Lewy bodies...
February 3, 2017: Acta Neuropathologica
https://www.readbyqxmd.com/read/28157273/a-novel-animal-model-of-acquired-human-temporal-lobe-epilepsy-based-on-the-simultaneous-administration-of-kainic-acid-and-lorazepam
#9
Friederike Kienzler-Norwood, Lara Costard, Chinmaya Sadangi, Philipp Müller, Valentin Neubert, Sebastian Bauer, Felix Rosenow, Braxton A Norwood
OBJECTIVE: Kainic acid (KA) is a potent glutamate analog that is used to induce neurodegeneration and model temporal lobe epilepsy (TLE) in rodents. KA reliably induces severe, prolonged seizures, that is, convulsive status epilepticus (cSE), which is typically fatal without pharmacologic intervention. Although the use of KA to model human epilepsy has proven unquestionably valuable for >30 years, significant variability and mortality continue to confound results. These issues are probably the consequence of cSE, an all-or-nothing response that is inherently capricious and uncontrollable...
February 2017: Epilepsia
https://www.readbyqxmd.com/read/28153692/chronic-demyelination-induced-seizures
#10
Andrew S Lapato, Jenny I Szu, Jonathan P C Hasselmann, Anna J Khalaj, Devin K Binder, Seema K Tiwari-Woodruff
Multiple sclerosis (MS) patients are three to six times more likely to develop epilepsy compared to the rest of the population. Seizures are more common in patients with early onset or progressive forms of the disease and prognosticate rapid progression to disability and death. Gray matter atrophy, hippocampal lesions, interneuron loss, and elevated juxtacortical lesion burden have been identified in MS patients with seizures; however, translational studies aimed at elucidating the pathophysiological processes underlying MS epileptogenesis are limited...
January 30, 2017: Neuroscience
https://www.readbyqxmd.com/read/28152425/stimulation-of-the-medial-septum-improves-performance-in-spatial-learning-following-pilocarpine-induced-status-epilepticus
#11
Darrin J Lee, Ali Izadi, Mikhail Melnik, Stacey Seidl, Angela Echeverri, Kiarash Shahlaie, Gene G Gurkoff
Temporal lobe epilepsy often leads to hippocampal sclerosis and persistent cognitive deficits, including difficulty with learning and memory. Hippocampal theta oscillations are critical in optimizing hippocampal function and facilitating plasticity. We hypothesized that pilocarpine-induced status epilepticus would disrupt oscillations and behavioral performance and that electrical neuromodulation to entrain theta would improve cognition specifically in injured rats. Rats received a pilocarpine (n=30) or saline injection (n=27) and unilateral bi-polar electrodes were implanted into the medial septum and hippocampus the following day...
January 17, 2017: Epilepsy Research
https://www.readbyqxmd.com/read/28138428/automated-tractography-in-patients-with-temporal-lobe-epilepsy-using-tracts-constrained-by-underlying-anatomy-tracula
#12
Barbara A K Kreilkamp, Bernd Weber, Mark P Richardson, Simon S Keller
PURPOSE: A detailed understanding of white matter tract alterations in patients with temporal lobe epilepsy (TLE) is important as it may provide useful information for likely side of seizure onset, cognitive impairment and postoperative prognosis. However, most diffusion-tensor imaging (DTI) studies have relied on manual reconstruction of tract bundles, despite the recent development of automated techniques. In the present study, we used an automated white matter tractography analysis approach to quantify temporal lobe white matter tract alterations in TLE and determine the relationships between tract alterations, the extent of hippocampal atrophy and the chronicity and severity of the disorder...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28131462/gene-based-association-study-of-genes-linked-to-hippocampal-sclerosis-of-aging-neuropathology-grn-tmem106b-abcc9-and-kcnmb2
#13
Yuriko Katsumata, Peter T Nelson, Sally R Ellingson, David W Fardo
Hippocampal sclerosis of aging (HS-Aging) is a common neurodegenerative condition associated with dementia. To learn more about genetic risk of HS-Aging pathology, we tested gene-based associations of the GRN, TMEM106B, ABCC9, and KCNMB2 genes, which were reported to be associated with HS-Aging pathology in previous studies. Genetic data were obtained from the Alzheimer's Disease Genetics Consortium, linked to autopsy-derived neuropathological outcomes from the National Alzheimer's Coordinating Center. Of the 3251 subjects included in the study, 271 (8...
January 9, 2017: Neurobiology of Aging
https://www.readbyqxmd.com/read/28124054/metal-maps-of-sclerotic-hippocampi-of-patients-with-mesial-temporal-lobe-epilepsy
#14
Miloš Opačić, Aleksandar J Ristić, Danijela Savić, Vid Simon Šelih, Marko Živin, Dragoslav Sokić, Savo Raičević, Vladimir Baščarević, Ivan Spasojević
The loss of metal homeostasis has been implicated in the pathophysiology of mesial temporal lobe epilepsy associated with hippocampal sclerosis (mTLE-HS). Here we applied laser ablation inductively coupled plasma mass spectrometry imaging to establish the spatial distribution of Zn, Fe, Cu and Mn in coronal sections of hippocampi of four patients with drug-resistant mTLE-HS who underwent amygdalohippocampectomy. Detailed maps of the metal concentrations in the different morphological areas/layers were built and analyzed...
January 26, 2017: Metallomics: Integrated Biometal Science
https://www.readbyqxmd.com/read/28111355/epigenetics-in-epilepsy
#15
REVIEW
K Kobow, I Blümcke
Approximately 50 million people have epilepsy, making it the most common chronic and severe neurological disease worldwide, with increased risk of mortality and psychological and socioeconomic consequences impairing quality of life. More than 30% of patients with epilepsy have inadequate control of their seizures with drug therapy. Any structural brain lesion can provoke epilepsy. However, progression of seizure activity as well as the development of drug-resistance remains difficult to predict, irrespective of the underlying epileptogenic condition, i...
January 19, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28108255/regular-exercise-promotes-memory-function-and-enhances-hippocampal-neuroplasticity-in-experimental-autoimmune-encephalomyelitis-mice
#16
Tae-Woon Kim, Yun-Hee Sung
Multiple sclerosis (MS) is a progressive condition affecting the central nervous system (CNS), and is characterized by the development of demyelinated lesions and plaques in the brain and spinal cord. Exercise is beneficial against dementia in elderly patients, so we investigated the effects of exercise on memory in relation to hippocampal demyelination and neuroplasticity in a mouse model of MS (experimental autoimmune encephalomyelitis [EAE]). Mice were randomly divided into three groups: Sham, EAE, and EAE and exercise (EAE+EX)...
January 17, 2017: Neuroscience
https://www.readbyqxmd.com/read/28104639/hippocampal-atrophy-is-associated-with-altered-hippocampus-posterior-cingulate-cortex-connectivity-in-mesial-temporal-lobe-epilepsy-with-hippocampal-sclerosis
#17
Y C Shih, C E Tseng, F-H Lin, H H Liou, W Y I Tseng
BACKGROUND AND PURPOSE: Unilateral mesial temporal lobe epilepsy and hippocampal sclerosis have structural and functional abnormalities in the mesial temporal regions. To gain insight into the pathophysiology of the epileptic network in mesial temporal lobe epilepsy with hippocampal sclerosis, we aimed to clarify the relationships between hippocampal atrophy and the altered connection between the hippocampus and the posterior cingulate cortex in patients with mesial temporal lobe epilepsy with hippocampal sclerosis...
January 19, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28096524/a-case-of-seronegative-limbic-encephalitis-with-multiple-sclerosis-a-possible-overlapping-syndrome
#18
Zerrin Karaaslan, Özlem Mercan, Erdem Tüzün, Handan Mısırlı, Recai Türkoğlu
BACKGROUND Autoimmune encephalitis might coexist in patients with autoimmune demyelinating disorders. CASE REPORT We report on a case of a 45-year-old female multiple sclerosis (MS) patient presenting with acute onset short-term memory loss, altered mental status, inflammatory cerebrospinal fluid (CSF) findings and an MRI lesion on the left temporal lobe. An extensive panel for neuronal autoantibodies proved negative. Neuropsychological symptoms gave a prompt response to immunotherapy but nevertheless control MRI showed left hippocampal atrophy...
January 18, 2017: American Journal of Case Reports
https://www.readbyqxmd.com/read/28087828/tdp-43-pathology-and-memory-impairment-in-elders-without-pathologic-diagnoses-of-ad-or-ftld
#19
Sukriti Nag, Lei Yu, Robert S Wilson, Er-Yun Chen, David A Bennett, Julie A Schneider
OBJECTIVE: To investigate the association of TAR DNA-binding protein 43 (TDP-43) pathology with memory, other cognitive domains, and dementia in community-dwelling elders without pathologic diagnoses of Alzheimer disease (AD) or frontotemporal lobar degeneration (FTLD). METHODS: Of 1,058 autopsied participants, 343 (32.4%) did not have pathologic diagnoses of AD or FTLD. Diagnosis of dementia was based on clinical evaluation and cognitive performance tests, which were used to create summary measures of global cognition and of 5 cognitive domains...
January 13, 2017: Neurology
https://www.readbyqxmd.com/read/28077166/threonine-175-a-novel-pathological-phosphorylation-site-on-tau-protein-linked-to-multiple-tauopathies
#20
Alexander J Moszczynski, Wencheng Yang, Robert Hammond, Lee Cyn Ang, Michael J Strong
Microtubule associated protein tau (tau) deposition is associated with a spectrum of neurodegenerative diseases collectively termed tauopathies. We have previously shown that amyotrophic lateral sclerosis (ALS) with cognitive impairment (ALSci) is associated with tau phosphorylation at Thr(175) and that this leads to activation of GSK3β which then induces phosphorylation at tau Thr(231). This latter step leads to dissociation of tau from microtubules and pathological tau fibril formation. To determine the extent to which this pathway is unique to ALS, we have investigated the expression of pThr(175) tau and pThr(231) tau across a range of frontotemporal degenerations...
January 11, 2017: Acta Neuropathologica Communications
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