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https://www.readbyqxmd.com/read/28326015/serotonin-regulates-the-firing-of-principal-cells-of-the-subiculum-by-inhibiting-a-t-type-ca-2-current
#1
Anders V Petersen, Camilla S Jensen, Valérie Crépel, Mathias Falkerslev, Jean-François Perrier
The subiculum is the main output of the hippocampal formation. A high proportion of its principal neurons fire action potentials in bursts triggered by the activation of low threshold calcium currents. This firing pattern promotes synaptic release and regulates spike-timing-dependent plasticity. The subiculum receives a high density of fibers originating from the raphe nuclei, suggesting that serotonin (5-HT) modulates subicular neurons. Here we investigated if and how 5-HT modulates the firing pattern of bursting neurons...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/28325473/foxh1-occupies-cis-regulatory-modules-prior-to-dynamic-transcription-factor-interactions-controlling-the-mesendoderm-gene-program
#2
Rebekah M Charney, Elmira Forouzmand, Jin Sun Cho, Jessica Cheung, Kitt D Paraiso, Yuuri Yasuoka, Shuji Takahashi, Masanori Taira, Ira L Blitz, Xiaohui Xie, Ken W Y Cho
The interplay between transcription factors and chromatin dictates gene regulatory network activity. Germ layer specification is tightly coupled with zygotic gene activation and, in most metazoans, is dependent upon maternal factors. We explore the dynamic genome-wide interactions of Foxh1, a maternal transcription factor that mediates Nodal/TGF-β signaling, with cis-regulatory modules (CRMs) during mesendodermal specification. Foxh1 marks CRMs during cleavage stages and recruits the co-repressor Tle/Groucho in the early blastula...
March 17, 2017: Developmental Cell
https://www.readbyqxmd.com/read/28325366/whorling-cellular-perineurioma-a-previously-undescribed-variant-closely-mimicking-monophasic-fibrous-synovial-sarcoma
#3
Michael Michal, Dmitry V Kazakov, Abbas Agaimy, Marta Hosova, Kvetoslava Michalova, Petr Grossmann, Petr Steiner, Faruk Skenderi, Semir Vranic, Michal Michal
The authors present a distinctive perineurioma (PN) variant which morphologically strongly resembles monophasic fibrous synovial sarcoma (MSS). The patients were 3 males and 1 female. The age ranged from 15 to 61years (mean: 44years). Locations included the sole, lower jaw, palm and foot. The tumor size ranged from 1.3cm to 2.5cm in the largest dimension (mean 1.8cm). Morphologically, all tumors had an identical, monotonous appearance. The perineurial cells were closely packed and created a confluent cellular whorls and/or sheets in a scarce stroma, with only focally discernible long, slender cytoplasmic processes typical for perineurial differentiation...
April 2017: Annals of Diagnostic Pathology
https://www.readbyqxmd.com/read/28296634/constitutive-scaffolding-of-multiple-wnt-enhanceosome-components-by-legless-bcl9
#4
Laurens M van Tienen, Juliusz Mieszczanek, Marc Fiedler, Trevor J Rutherford, Mariann Bienz
Wnt/β-catenin signaling elicits context-dependent transcription switches that determine normal development and oncogenesis. These are mediated by the Wnt enhanceosome, a multiprotein complex binding to the Pygo chromatin reader and acting through TCF/LEF-responsive enhancers. Pygo renders this complex Wnt-responsive, by capturing β-catenin via the Legless/BCL9 adaptor. We used CRISPR/Cas9 genome engineering of Drosophila legless (lgs) and human BCL9 and B9L to show that the C-terminus downstream of their adaptor elements is crucial for Wnt responses...
March 15, 2017: ELife
https://www.readbyqxmd.com/read/28284051/amygdala-enlargement-temporal-lobe-epilepsy-subtype-or-nonspecific-finding
#5
Anny Reyes, Thomas Thesen, Ruben Kuzniecky, Orrin Devinsky, Carrie R McDonald, Graeme D Jackson, David N Vaughan, Karen Blackmon
OBJECTIVE: Amygdala enlargement (AE) is observed in patients with temporal lobe epilepsy (TLE), which has led to the suggestion that it represents a distinct TLE subtype; however, it is unclear whether AE is found at similar rates in other epilepsy syndromes or in healthy controls, which would limit its value as a marker for focal epileptogenicity. METHODS: We compared rates of AE, defined quantitatively from high-resolution T1-weighted MRI, in a large multi-site sample of 136 patients with nonlesional localization related epilepsy (LRE), including TLE and extratemporal (exTLE) focal epilepsy, 34 patients with idiopathic generalized epilepsy (IGE), and 233 healthy controls (HCs)...
March 2, 2017: Epilepsy Research
https://www.readbyqxmd.com/read/28269699/automated-volumetry-for-unilateral-hippocampal-sclerosis-detection-in-patients-with-temporal-lobe-epilepsy
#6
Cristina Martins, Nadia Moreira da Silva, Guilherme Silva, Verena E Rozanski, Joao Paulo Silva Cunha
Hippocampal sclerosis (HS) is the most common cause of temporal lobe epilepsy (TLE) and can be identified in magnetic resonance imaging as hippocampal atrophy and subsequent volume loss. Detecting this kind of abnormalities through simple radiological assessment could be difficult, even for experienced radiologists. For that reason, hippocampal volumetry is generally used to support this kind of diagnosis. Manual volumetry is the traditional approach but it is time consuming and requires the physician to be familiar with neuroimaging software tools...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28268518/tle-lateralization-using-whole-brain-structural-connectivity
#7
Esmaeil Davoodi-Bojd, Kost V Elisevich, Jason Schwalb, Ellen Air, Hamid Soltanian-Zadeh
A prerequisite of temporal lobe epilepsy (TLE) surgery is to lateralize the disease. Recent studies have shown the capability of diffusion weighted MRI (DWMRI) in lateralizing TLE patients. This has been achieved by analyzing diffusion parameters of specific white matter tracts or regions known to be involved in the disease; however, other brain regions and connections have not been investigated for TLE lateralization. Whole brain structural connectivity using DWMRI provides a wealth of information regarding the structural connections in the brain...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28268489/predicting-seizures-in-untreated-temporal-lobe-epilepsy-using-point-process-nonlinear-models-of-heartbeat-dynamics
#8
G Valenza, A Romigi, L Citi, F Placidi, F Izzi, M Albanese, E P Scilingo, M G Marciani, A Duggento, M Guerrisi, N Toschi, R Barbieri
Symptoms of temporal lobe epilepsy (TLE) are frequently associated with autonomic dysregulation, whose underlying biological processes are thought to strongly contribute to sudden unexpected death in epilepsy (SUDEP). While abnormal cardiovascular patterns commonly occur during ictal events, putative patterns of autonomic cardiac effects during pre-ictal (PRE) periods (i.e. periods preceding seizures) are still unknown. In this study, we investigated TLE-related heart rate variability (HRV) through instantaneous, nonlinear estimates of cardiovascular oscillations during inter-ictal (INT) and PRE periods...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28266710/mri-negative-temporal-lobe-epilepsy-what-do-we-know
#9
REVIEW
Wolfgang Muhlhofer, Yee-Leng Tan, Susanne G Mueller, Robert Knowlton
Temporal lobe epilepsy (TLE) is the most common focal epilepsy in adults. TLE has a high chance of becoming medically refractory, and as such, is frequently considered for further evaluation and surgical intervention. Up to 30% of TLE cases, however, can have normal ("nonlesional" or negative) magnetic resonance imaging (MRI) results, which complicates the presurgical workup and has been associated with worse surgical outcomes. Helped by contributions from advanced imaging techniques and electrical source localization, the number of surgeries performed on MRI-negative TLE has increased over the last decade...
March 7, 2017: Epilepsia
https://www.readbyqxmd.com/read/28255730/medial-temporal-lobe-epilepsy-associated-with-hippocampal-sclerosis-is-a-distinctive-syndrome
#10
Young Joo No, Chiara Zavanone, Franck Bielle, Vi-Huong Nguyen-Michel, Yves Samson, Claude Adam, Vincent Navarro, Sophie Dupont
Epileptic syndromes are distinctive disorders with specific features, which when taken together, permit a specific diagnosis. There is actually a debate on that medial temporal lobe epilepsy with hippocampal sclerosis is an epileptic syndrome. To address this issue, we searched for discriminative semiological features between temporal lobe epilepsy patients with hippocampal sclerosis (TLE-HS patients or group 1), TLE patients with medial structural lesion other than hippocampal sclerosis or in MRI-negative cases with medial onset on further investigations (group 2) and lateral TLE patients (LTLE or group 3)...
March 2, 2017: Journal of Neurology
https://www.readbyqxmd.com/read/28254578/the-association-between-traumatic-life-events-and-psychological-symptoms-from-a-conservative-transdiagnostic-perspective
#11
Lauren E Gibson, Shanna Cooper, Lauren E Reeves, Deidre M Anglin, Lauren M Ellman
Exposure to traumatic life events (TLEs) is strongly linked to the onset and exacerbation of an array of psychological sequelae. While studies yield minimal evidence of specificity for one disorder emerging in the aftermath of TLEs versus another, most studies do not adopt a conservative approach in controlling for multiple psychological symptoms linked to TLEs. The present study explored the association between TLEs and eight psychological constructs before and after adjusting for concurrent symptomatology in a diverse sample of 2342 undergraduates...
February 22, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28248724/tle-1-positive-angiomatoid-fibrous-histiocytoma-mimicking-synovial-sarcoma
#12
Daniel J Zaccarini, Rana Naous, Yesha Sheth, Ola El-Zammar, Gustavo de la Roza, Christopher M Curtiss
Angiomatoid fibrous histiocytoma (AFH) is a rare soft tissue tumor most commonly seen in young adults and children. We report a case with morphology and immunohistochemistry supporting the diagnosis of synovial sarcoma. On core biopsy, the tumor had spindle cell and epithelioid morphology with a myxoid background. Staining for transducin-like enhancer of split 1 and CD99 were positive; however, subsequent fluorescence in situ hybridization for SYT (SS18, nBAF chromatin remodeling complex subunit) break apart returned negative...
February 28, 2017: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/28242958/intranasal-delivery-of-mir-146a-mimics-delayed-seizure-onset-in-the-lithium-pilocarpine-mouse-model
#13
Hua Tao, Jianghao Zhao, Tingting Liu, Yujie Cai, Xu Zhou, Huaijie Xing, Yan Wang, Mingkang Yin, Wangtao Zhong, Zhou Liu, Keshen Li, Bin Zhao, Haihong Zhou, Lili Cui
Unveiling the key mechanism of temporal lobe epilepsy (TLE) for the development of novel treatments is of increasing interest, and anti-inflammatory miR-146a is now considered a promising molecular target for TLE. In the current study, a C57BL/6 TLE mouse model was established using the lithium-pilocarpine protocol. The seizure degree was evaluated according to the Racine scale, and level 5 was considered the threshold for generalized convulsions. Animals were sacrificed to analyze the hippocampus at three time points (2 h and 4 and 8 weeks after pilocarpine administration to evaluate the acute, latent, and chronic phases, resp...
2017: Mediators of Inflammation
https://www.readbyqxmd.com/read/28236724/clinical-and-sociodemographic-variables-associated-with-interictal-dysphoric-disorder-and-interictal-personality-in-patients-with-drug-resistant-temporal-lobe-epilepsy-a-controlled-study
#14
Gerardo Maria de Araújo Filho, Bruna Tarifa, Raquel Espagnolla Santos, Ana Laura de Oliveira Dias, Júlia Rodrigues Leandro Ulliano, Lucia Helena Neves Marques
Psychiatric disorders (PD) have an elevated prevalence and an important negative impact on patients with epilepsy (PWE) since they are associated with lower quality of life and clinical refractoriness. However, it is also necessary to identify behavioral conditions possibly associated with epilepsy that are not part of the standard psychiatric classifications, such as Interictal Dysphoric Disorder (IDD) and Interictal Personality (IP). The frequency of IDD and IP in patients with drug-resistant temporal lobe epilepsy and mesial temporal sclerosis (TLE-MTS) was assessed...
February 22, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/28235654/is-burned-out-hippocampus-syndrome-a-distinct-electro-clinical-variant-of-mtle-hs-syndrome
#15
Pradeep P Nair, Ramshekhar N Menon, Ashalatha Radhakrishnan, Ajit Cherian, Mathew Abraham, George Vilanilam, C Kesavadas, Bejoy Thomas, Aley Alexander, Sanjeev V Thomas
AIM: To study the clinical, electrophysiological and imaging characteristics of patients with unilateral mesial temporal lobe epilepsy (MTLE) with contralateral ictal onset on scalp EEG, viz. 'burned-out hippocampus' syndrome (MTLE-BHS). METHODS: MTLE-BHS was defined as TLE with unilateral hippocampal sclerosis (HS) without any dual pathology on MRI and contralateral ictal onset on scalp EEG, unlike in classical hippocampal sclerosis (HS). Consecutive "MTLE-BHS" patients evaluated at our Centre for Comprehensive Epilepsy Care from January 2005 to July 2014 were studied...
February 21, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/28227960/automated-volumetry-for-unilateral-hippocampal-sclerosis-detection-in-patients-with-temporal-lobe-epilepsy
#16
Cristina Martins, Nadia Moreira da Silva, Guilherme Silva, Verena E Rozanski, Joao Paulo Silva Cunha, Cristina Martins, Nadia Moreira da Silva, Guilherme Silva, Verena E Rozanski, Joao Paulo Silva Cunha, Joao Paulo Silva Cunha, Guilherme Silva, Verena E Rozanski, Nadia Moreira da Silva, Cristina Martins
Hippocampal sclerosis (HS) is the most common cause of temporal lobe epilepsy (TLE) and can be identified in magnetic resonance imaging as hippocampal atrophy and subsequent volume loss. Detecting this kind of abnormalities through simple radiological assessment could be difficult, even for experienced radiologists. For that reason, hippocampal volumetry is generally used to support this kind of diagnosis. Manual volumetry is the traditional approach but it is time consuming and requires the physician to be familiar with neuroimaging software tools...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226692/tle-lateralization-using-whole-brain-structural-connectivity
#17
Esmaeil Davoodi-Bojd, Kost V Elisevich, Jason Schwalb, Ellen Air, Hamid Soltanian-Zadeh, Esmaeil Davoodi-Bojd, Kost V Elisevich, Jason Schwalb, Ellen Air, Hamid Soltanian-Zadeh, Hamid Soltanian-Zadeh, Kost V Elisevich, Esmaeil Davoodi-Bojd, Ellen Air, Jason Schwalb
A prerequisite of temporal lobe epilepsy (TLE) surgery is to lateralize the disease. Recent studies have shown the capability of diffusion weighted MRI (DWMRI) in lateralizing TLE patients. This has been achieved by analyzing diffusion parameters of specific white matter tracts or regions known to be involved in the disease; however, other brain regions and connections have not been investigated for TLE lateralization. Whole brain structural connectivity using DWMRI provides a wealth of information regarding the structural connections in the brain...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226663/predicting-seizures-in-untreated-temporal-lobe-epilepsy-using-point-process-nonlinear-models-of-heartbeat-dynamics
#18
G Valenza, A Romigi, L Citi, F Placidi, F Izzi, M Albanese, E P Scilingo, M G Marciani, A Duggento, M Guerrisi, N Toschi, R Barbieri, G Valenza, A Romigi, L Citi, F Placidi, F Izzi, M Albanese, E P Scilingo, M G Marciani, A Duggento, M Guerrisi, N Toschi, R Barbieri, M Guerrisi, F Izzi, F Placidi, A Romigi, E P Scilingo, A Duggento, M Albanese, N Toschi, M G Marciani, R Barbieri, G Valenza, L Citi
Symptoms of temporal lobe epilepsy (TLE) are frequently associated with autonomic dysregulation, whose underlying biological processes are thought to strongly contribute to sudden unexpected death in epilepsy (SUDEP). While abnormal cardiovascular patterns commonly occur during ictal events, putative patterns of autonomic cardiac effects during pre-ictal (PRE) periods (i.e. periods preceding seizures) are still unknown. In this study, we investigated TLE-related heart rate variability (HRV) through instantaneous, nonlinear estimates of cardiovascular oscillations during inter-ictal (INT) and PRE periods...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28222339/everyday-memory-impairment-in-patients-with-temporal-lobe-epilepsy-caused-by-hippocampal-sclerosis
#19
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/28217811/-quantitative-evaluation-of-inhibitory-effects-of-epileptic-spikes-on-theta-rhythms-in-the-network-of-hippocampal-ca3-and-entorhinal-cortex-in-patients-with-temporal-lobe-epilepsy
#20
Man-Ling Ge, Jun-Dan Guo, Sheng-Hua Chen, Ji-Chang Zhang, Xiao-Xuan Fu, Yu-Min Chen
Epileptic spike is an indicator of hyper-excitability and hyper-synchrony in the neural networks. The inhibitory effects of spikes on theta rhythms (4-8 Hz) might be helpful to understand the mechanism of epileptic damage on the cognitive functions. To quantitatively evaluate the inhibitory effects of spikes on theta rhythms, intracerebral electroencephalogram (EEG) recordings with both sporadic spikes (SSs) and spike-free transient period between adjacent spikes were selected in 4 patients in the status of rapid eyes movement (REM) sleep with temporal lobe epilepsy (TLE) under the pre-surgical monitoring...
February 25, 2017: Sheng Li Xue Bao: [Acta Physiologica Sinica]
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