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https://www.readbyqxmd.com/read/27920144/methyl-cpg-binding-protein-mbd1-regulates-neuronal-lineage-commitment-through-maintaining-adult-neural-stem-cell-identity
#1
Emily M Jobe, Yu Gao, Brian E Eisinger, Janessa K Mladucky, Charles C Giuliani, Laurel E Kelnhofer, Xinyu Zhao
: MBD1 belongs to a family of methyl-CpG binding proteins that are epigenetic "readers", linking DNA methylation to transcriptional regulation. MBD1 is expressed in neural stem cells residing in the dentate gyrus of the adult hippocampus (aNSCs), and MBD1 deficiency leads to reduced neuronal differentiation, impaired neurogenesis, learning deficits, and autism-like behaviors in mice; however the precise function of MBD1 in aNSCs remains unexplored. Here, we show that MBD1 is important for maintaining the integrity and stemness of NSCs, which is critical for their ability to generate neurons...
December 5, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27919728/voluntary-running-improves-depressive-behaviours-and-the-structure-of-the-hippocampus-in-rats-a-possible-impact-of-myokines
#2
Magda A Eldomiaty, Shaima M Almasry, Maha K Desouky, Sami A Algaidi
This study investigated the impact of voluntary exercise on depressive behaviours, serum and hippocampal levels of myokines, and histopathological features of hippocampal formation in rats. Depressed rats were allowed to voluntarily run on a wheel for 3 weeks. Locomotor activity was assessed by a forced swimming test and the myokine levels in sera and hippocampal homogenates were measured using Enzyme-linked Immunosorbent Assay. Brain sections were analysed for hippocampal structure and neuronal counts. Voluntary running produced significant increase in the distance moved by rats and significant decrease in immobility duration...
December 2, 2016: Brain Research
https://www.readbyqxmd.com/read/27917056/two-new-species-of-floresorchestia-crustacea-amphipoda-talitridae-in-thailand
#3
Koraon Wongkamhaeng, Pongrat Dumrongrojwattana, Manasawan Saengsakda Pattaratumrong
The beach-hopper and land-hopper genus Floresorchestia Bousfield, 1984 is most widespread in terrestrial and marine littoral habitats and has been recorded from the South African coasts through to tropical Indo-Pacific and Caribbean Sea. In Thailand, there is only Floresorchestia samroiyodensis Azman, Wongkamhaeng & Dumrongrojwattana, 2014 reported from the swamp of Prachuab Kiri Khan, southern Thailand. In this work, two new species of Floresorchestia from Phutsa Reservoir in Nakhon Ratchasima and the man-made swamp in Burapha University are described...
2016: ZooKeys
https://www.readbyqxmd.com/read/27916687/a-unique-combination-of-micronutrients-rejuvenates-cognitive-performance-in-aged-mice
#4
Sam D Perez, Kristy Du, Catarina Rendeiro, Lin Wang, Qian Wu, Stanislav S Rubakhin, Rema Vazhappilly, Jeffrey H Baxter, Jonathan V Sweedler, Justin S Rhodes
It is widely believed that diet can influence the onset and severity of cognitive aging, but the optimal combination of micronutrients and molecular and cellular mechanisms remain elusive. The purpose of this study was to compare the effects of eight distinct diets, consisting of various concentrations of selected micronutrients, on learning and memory as well as markers of neuronal plasticity, and metabolic and neuro-immune status of the aged hippocampus. Eighteen-month-old male and female C57BL/6J mice were fed the diets for 16 weeks, followed by learning and memory trials on the active avoidance task...
December 1, 2016: Behavioural Brain Research
https://www.readbyqxmd.com/read/27914670/comparison-of-masticatory-efficacy-among-complete-denture-wearers-with-two-adhesives-and-dentate-individuals-a%C3%A2-randomized-crossover-double-blind-clinical-trial
#5
Carlos Torres-Sánchez, Vanessa Montoya-Salazar, Daniel Torres-Lagares, Jose Luis Gutierrez-Pérez, Emilio Jimenez-Castellanos
STATEMENT OF PROBLEM: The masticatory efficacy between dentate and edentulous individuals with and without the use of dental adhesives has been little studied. A comparative study of the addition of various agents of synthetic adhesion (vinyl methyl ether versus polyvinyl acetate) to these adhesives is needed. PURPOSE: The purpose of this randomized, crossover, double-blind clinical trial was to compare the masticatory efficacy of wearers of complete dentures with and without dental adhesives of 2 different compositions and that of dentate controls...
November 30, 2016: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/27913590/control-of-spike-transfer-at-hippocampal-mossy-fiber-synapses-in-vivo-by-gabaa-and-gabab-receptor-mediated-inhibition
#6
Stefano Zucca, Marilena Griguoli, Meryl Malézieux, Noëlle Grosjean, Mario Carta, Christophe Mulle
: Despite extensive studies in hippocampal slices and incentive from computational theories, the synaptic mechanisms underlying information transfer at mossy fiber (mf) connections between the dentate gyrus (DG) and CA3 neurons in vivo are still elusive. Here we used an optogenetic approach in mice to selectively target and control the activity of DG granule cells (GCs) while performing whole cell and juxtacellular recordings of CA3 neurons in vivo In CA3 pyramidal cells (PCs), mf-CA3 synaptic responses consisted predominantly of an inhibitory postsynaptic potential (IPSP) at low stimulation frequency (0...
December 2, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27911310/cholinergic-modification-of-neurogenesis-and-gliosis-improves-the-memory-of%C3%A2-a%C3%AE-ppswe-psen1de9-alzheimer-s-disease-model-mice-fed-a-high-fat-diet
#7
Takeshi Matsuda, Tatsuhiro Hisatsune
We previously reported that neuroinflammation contributes to the amnesia of AβPPswe/PSEN1dE9 Alzheimer's disease model mice fed a high-fat diet to induce type-2 diabetes (T2DM-AD mice), but the underlying mechanism for the memory decline remained unclear. Recent studies have suggested that cholinergic modulation is involved in neuroinflammatory cellular reactions including neurogenesis and gliosis, and in memory improvement. In this study, we administered a broad-spectrum cholinesterase inhibitor, rivastigmine (2 mg/kg/day, s...
November 28, 2016: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/27911261/targeted-deletion-of-akap7-in-dentate-granule-cells-impairs-spatial-discrimination
#8
Brian W Jones, Jennifer Deem, Thomas J Younts, Michael Weisenhaus, Christina A Sanford, Margaret C Slack, Jenesa Chin, Daniela Nachmanson, Alex McKennon, Pablo E Castillo, G Stanley McKnight
Protein Kinase A (PKA) mediates synaptic plasticity and is widely implicated in learning and memory. The hippocampal dentate gyrus (DG) is thought to be responsible for processing and encoding distinct contextual associations in response to highly similar inputs. The mossy fiber (MF) axons of the dentate granule cells convey strong excitatory drive to CA3 pyramidal neurons and express presynaptic, PKA-dependent forms of plasticity. Here, we demonstrate an essential role for the PKA anchoring protein, AKAP7, in mouse MF axons and terminals...
December 2, 2016: ELife
https://www.readbyqxmd.com/read/27905990/oral-dental-items-in-the-resident-assessment-instrument-minimum-data-set-2-0-lack-validity-results-of-a-retrospective-longitudinal-validation-study
#9
Matthias Hoben, Jeffrey W Poss, Peter G Norton, Carole A Estabrooks
BACKGROUND: Oral health in nursing home residents is poor. Robust, mandated assessment tools such as the Resident Assessment Instrument - Minimum Data Set (RAI-MDS) 2.0 are key to monitoring and improving quality of oral health care in nursing homes. However, psychometric properties of RAI-MDS 2.0 oral/dental items have been challenged and criterion validity of these items has never been assessed. METHODS: We used 73,829 RAI-MDS 2.0 records (13,118 residents), collected in a stratified random sample of 30 urban nursing homes in Western Canada (2007-2012)...
October 21, 2016: Population Health Metrics
https://www.readbyqxmd.com/read/27905869/neurogenic-effects-of-low-dose-whole-body-hze-fe-ion-and-gamma-irradiation
#10
Tara B Sweet, Sean D Hurley, Michael D Wu, John A Olschowka, Jacqueline P Williams, M Kerry O'Banion
Understanding the dose-toxicity profile of radiation is critical when evaluating potential health risks associated with natural and man-made sources in our environment. The purpose of this study was to evaluate the effects of low-dose whole-body high-energy charged (HZE) iron (Fe) ions and low-energy gamma exposure on proliferation and differentiation of adult-born neurons within the dentate gyrus of the hippocampus, cells deemed to play a critical role in memory regulation. To determine the dose-response characteristics of the brain to whole-body Fe-ion vs...
December 1, 2016: Radiation Research
https://www.readbyqxmd.com/read/27898990/european-paediatric-surgeons-association-survey-on-the-management-of-hirschsprung-disease
#11
Augusto Zani, Simon Eaton, Francesco Morini, Prem Puri, Risto Rintala, Ernest van Heurn, Marija Lukac, Pietro Bagolan, Joachim F Kuebler, Florian Friedmacher, Rene Wijnen, Juan A Tovar, Michael E Hoellwarth, Agostino Pierro
: Aim This study aims to define patterns of Hirschsprung disease (HD) management. Methods An online questionnaire was sent to all European Paediatric Surgeons' Association (EUPSA) members. Results A total of 294 members (61 countries) answered (response rate: 61%). DIAGNOSIS: All respondents perform rectal biopsies (61% rectal suction [RSBs], 39% open full-thickness), 96% contrast enema, and 31% anorectal manometry. At RSB, 17% take the most distal biopsy 1 cm above the dentate line, 34% take 2 cm, 30% take 3 cm, and 19% take > 3 cm...
November 29, 2016: European Journal of Pediatric Surgery
https://www.readbyqxmd.com/read/27898626/dental-trauma-in-a-pediatric-emergency-department-referral-center
#12
Emily Hall, Patricia Hickey, Thuy Nguyen-Tran, Jeff Louie
OBJECTIVE: The purpose of this study was to describe dental and associated oral injuries in a pediatric population that presents to an emergency department. METHODS: We performed a retrospective study and identified children from January 2007 to September 2011. Charts were reviewed for any subject, age from newborn to younger than 19 years, based on International Classification of Diseases, Ninth Revision codes for any dental or oral injury. Data abstraction included demographics, time of day of presentation, location and identification of tooth (s) injured, management, and disposition...
December 2016: Pediatric Emergency Care
https://www.readbyqxmd.com/read/27896316/compound-heterozygous-intermediate-mjd-alleles-cause-cerebellar-ataxia-with-sensory-neuropathy
#13
Yuji Takahashi, Masahiro Kanai, Tomoya Taminato, Shoko Watanabe, Chihiro Matsumoto, Toshiyuki Araki, Tomoko Okamoto, Masafumi Ogawa, Miho Murata
Spinocerebellar degeneration (SCD) is a group of disorders characterized by progressive ataxia caused by dysfunction and atrophy of the cerebellum or its projections. Approximately one-third of SCD cases are familial SCD, the majority of which are attributed to CAG triplet repeat expansions including spinocerebellar ataxia (SCA)1, SCA2, Machado-Joseph disease (MJD)/SCA3, SCA6, SCA8, SCA12, SCA17, and dentate-rubro-pallido-luysian atrophy (DRPLA). The triplet repeat number of the alleles representing complete penetrance varies among diseases...
February 2016: Neurology. Genetics
https://www.readbyqxmd.com/read/27895926/non-invasive-brain-stimulation-as-a-tool-to-study-cerebellar-m1-interactions-in-humans
#14
REVIEW
Sara Tremblay, Duncan Austin, Ricci Hannah, John C Rothwell
The recent development of non-invasive brain stimulation techniques such as transcranial magnetic stimulation (TMS) has allowed the non-invasive assessment of cerebellar function in humans. Early studies showed that cerebellar activity, as reflected in the excitability of the dentate-thalamo-cortical pathway, can be assessed with paired stimulation of the cerebellum and the primary motor cortex (M1) (cerebellar inhibition of motor cortex, CBI). Following this, many attempts have been made, using techniques such as repetitive TMS and transcranial electrical stimulation (TES), to modulate the activity of the cerebellum and the dentate-thalamo-cortical output, and measure their impact on M1 activity...
2016: Cerebellum & Ataxias
https://www.readbyqxmd.com/read/27893880/protective-prevention-effects-on-the-association-of-poverty-with-brain-development
#15
Gene H Brody, Joshua C Gray, Tianyi Yu, Allen W Barton, Steven R H Beach, Adrianna Galván, James MacKillop, Michael Windle, Edith Chen, Gregory E Miller, Lawrence H Sweet
Importance: This study was designed to determine whether a preventive intervention focused on enhancing supportive parenting could ameliorate the association between exposure to poverty and brain development in low socioeconomic status African American individuals from the rural South. Objective: To determine whether participation in an efficacious prevention program designed to enhance supportive parenting for rural African American children will ameliorate the association between living in poverty and reduced hippocampal and amygdalar volumes in adulthood...
November 28, 2016: JAMA Pediatrics
https://www.readbyqxmd.com/read/27893017/evaluation-of-cognitive-deficits-and-structural-hippocampal-damage-in-encephalitis-with-leucine-rich-glioma-inactivated-1-antibodies
#16
Carsten Finke, Harald Prüss, Josephine Heine, Sigrid Reuter, Ute A Kopp, Florian Wegner, Florian Then Bergh, Sebastian Koch, Olav Jansen, Thomas Münte, Günther Deuschl, Klemens Ruprecht, Winfried Stöcker, Klaus-Peter Wandinger, Friedemann Paul, Thorsten Bartsch
Importance: Limbic encephalitis with leucine-rich, glioma-inactivated 1 (LGI1) antibodies is one of the most frequent variants of autoimmune encephalitis with antibodies targeting neuronal surface antigens. However, the neuroimaging pattern and long-term cognitive outcome are not well understood. Objective: To study cognitive outcome and structural magnetic resonance imaging (MRI) alterations in patients with anti-LGI1 encephalitis. Design, Setting, and Participants: A cross-sectional study was conducted at the Departments of Neurology at Charité-Universitätsmedizin Berlin and University Hospital Schleswig-Holstein, Kiel, Germany...
November 21, 2016: JAMA Neurology
https://www.readbyqxmd.com/read/27889678/early-hippocampal-hyperexcitability-in-ps2app-mice-role-of-mutant-ps2-and-app
#17
Roberto Fontana, Mario Agostini, Emanuele Murana, Mufti Mahmud, Elena Scremin, Maria Rubega, Giovanni Sparacino, Stefano Vassanelli, Cristina Fasolato
Alterations of brain network activity are observable in Alzheimer's disease (AD) together with the occurrence of mild cognitive impairment, before overt pathology. However, in humans as well in AD mouse models, identification of early biomarkers of network dysfunction is still at its beginning. We performed in vivo recordings of local field potential activity in the dentate gyrus of PS2APP mice expressing the human amyloid precursor protein (APP) Swedish mutation and the presenilin-2 (PS2) N141I. From a frequency-domain analysis, we uncovered network hyper-synchronicity as early as 3 months, when intracellular accumulation of amyloid beta was also observable...
November 5, 2016: Neurobiology of Aging
https://www.readbyqxmd.com/read/27889432/decrease-of-high-voltage-ca-2-currents-in-the-dentate-gyrus-granule-cells-by-entorhinal-amyloidopathy-is-reversed-by-calcium-channel-blockade
#18
Hamid Gholami Pourbadie, Nima Naderi, Hadi Mirzapour Delavar, Mahshid Hosseinzadeh, Nasrin Mehranfard, Fariba Khodagholi, Mahyar Janahmadi, Fereshteh Motamedi
In the Alzheimer's disease (AD), entorhinal-hippocampal circuit is one of the earliest affected networks. There are some evidences indicating abnormal neuronal excitability and impaired synaptic plasticity in the dentate gyrus (DG) of AD animal model. However, the underlying mechanism leading to DG dysfunction particularly in the early phase of AD is not known. Since calcium dyshomeostasis has a critical role in the etiology of AD, it is possible that this phenomenon precedes electrophysiological alteration in the DG...
November 24, 2016: European Journal of Pharmacology
https://www.readbyqxmd.com/read/27888509/functional-properties-of-granule-cells-with-hilar-basal-dendrites-in-the-epileptic-dentate-gyrus
#19
Tony Kelly, Heinz Beck
OBJECTIVE: The maturation of adult-born granule cells and their functional integration into the network is thought to play a key role in the proper functioning of the dentate gyrus. In temporal lobe epilepsy, adult-born granule cells in the dentate gyrus develop abnormally and possess a hilar basal dendrite (HBD). Although morphological studies have shown that these HBDs have synapses, little is known about the functional properties of these HBDs or the intrinsic and network properties of the granule cells that possess these aberrant dendrites...
November 26, 2016: Epilepsia
https://www.readbyqxmd.com/read/27888347/different-phenotypes-in-identical-twins-with-cerebrotendinous-xanthomatosis-case-series
#20
Dénes Zádori, László Szpisjak, László Madar, Viktória Evelin Varga, Bernadett Csányi, Krisztina Bencsik, István Balogh, Mariann Harangi, Éva Kereszty, László Vécsei, Péter Klivényi
Cerebrotendinous xanthomatosis (CTX) is a rare, genetically determined error of metabolism. The characteristic clinical symptoms are diarrhea, juvenile cataracts, tendon xanthomas and neuropsychiatric alterations. The aim of this study is to present a pair of identical adult twins with considerable differences in the severity of phenotype. With regards to neuropsychiatric symptoms, the predominant features were severe Parkinsonism and moderate cognitive dysfunctions in the more-affected individual, whereas these alterations in the less-affected patient were only very mild and mild, respectively...
November 25, 2016: Neurological Sciences
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