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https://www.readbyqxmd.com/read/28548278/neuropeptide-s-precursor-knockout-mice-display-memory-and-arousal-deficits
#1
Xiaobin Liu, Wei Si, Celia Garau, Kay Jüngling, Hans-Christian Pape, Stefan Schulz, Rainer K Reinscheid
Activation of Neuropeptide S (NPS) signaling has been found to produce arousal, wakefulness, anxiolytic-like behaviors and enhanced memory formation. In order to further study physiological functions of the NPS system, we generated NPS precursor knockout mice by homologous recombination in embryonic stem cells. NPS(-/-) mice were viable, fertile, and anatomically normal, when compared to their wildtype and heterozygous littermates. The total number of NPS neurons - although no longer synthesizing the peptide - was not affected by the knockout, as analyzed in NPS(-/-) /NPS(EGFP) double-transgenic mice...
May 26, 2017: European Journal of Neuroscience
https://www.readbyqxmd.com/read/28546087/region-specific-oligodendrocyte-transcription-factor-expression-in-a-model-of-neonatal-hypoxic-injury
#2
Bethann M Affeldt, Andre Obenaus, Jonathan Chan, Andrea C Pardo
White matter injury (WMI) of prematurity is associated with a spectrum of neurological disorders ranging from mild cognitive and behavioral deficits to cerebral palsy. Translational studies have implicated impaired oligodendrocyte development after hypoxia as the primary cause of WMI, but the underlying mechanisms remain poorly understood. The goal of this study was to identify alterations in the expression of oligodendrocyte precursor cell transcription factors in a mouse model of transient mild global hypoxia...
May 22, 2017: International Journal of Developmental Neuroscience
https://www.readbyqxmd.com/read/28544326/haploinsufficiency-of-nr4a2-is-associated-with-a-neurodevelopmental-phenotype-with-prominent-language-impairment
#3
Miriam S Reuter, Mandy Krumbiegel, Gregor Schlüter, Arif B Ekici, André Reis, Christiane Zweier
Non-recurrent deletions in 2q24.1, minimally overlapping two genes, NR4A2 and GPD2, were recently described in individuals with language impairment and behavioral and cognitive symptoms. We herewith report on a female patient with a similar phenotype of severe language and mild cognitive impairment, in whom we identified a de novo deletion covering only NR4A2. NR4A2 encodes a transcription factor highly expressed in brain regions critical for speech and language and implicated in dopaminergic neuronal development...
May 24, 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28536916/advanced-parental-age-impaired-fear-conditioning-and-hippocampal-ltd-in-adult-female-rat-offspring
#4
Lilu Luo, Tingting Sun, Xin Guan, Yiling Ni, Liqiang Yang, Quan Zhao, Xiangyang Kong, Yanmei Chen, Jichuan Zhang
Advanced maternal or paternal age is associated with increased risks of cognitive and emotional disorders. Chronic stress is also a common experience in human life that causes psychiatric diseases. However, the synergistic effects of these two factors on offspring are rarely studied. In the present study, the offspring of both young (3-4 months) and old (12-14 months) rat parents were given CUMS for 21 days at the age of 4 weeks. The effects of advanced parental age and chronic unpredictable mild stress (CUMS) on emotional and cognitive behaviors and the related cellular mechanisms were investigated by using behavioral and electrophysiological techniques...
May 23, 2017: Neurochemical Research
https://www.readbyqxmd.com/read/28536821/impaired-motor-coordination-and-learning-in-mice-lacking-anoctamin-2-calcium-gated-chloride-channels
#5
Franziska Neureither, Katharina Ziegler, Claudia Pitzer, Stephan Frings, Frank Möhrlen
Neurons communicate through excitatory and inhibitory synapses. Both lines of communication are adjustable and allow the fine tuning of signal exchange required for learning processes in neural networks. Several distinct modes of plasticity modulate glutamatergic and GABAergic synapses in Purkinje cells of the cerebellar cortex to promote motor control and learning. In the present paper, we present evidence for a role of short-term ionic plasticity in the cerebellar circuit activity. This type of plasticity results from altered chloride driving forces at the synapses that molecular layer interneurons form on Purkinje cell dendrites...
May 23, 2017: Cerebellum
https://www.readbyqxmd.com/read/28527714/investigation-of-left-and-right-lateral-fluid-percussion-injury-in-c57bl6-j-mice-in-vivo-functional-consequences
#6
Lesley D Schurman, Terry L Smith, Anthony J Morales, Nancy N Lee, Thomas M Reeves, Linda L Phillips, Aron H Lichtman
Although rodent models of traumatic brain injury (TBI) reliably produce cognitive and motor disturbances, behavioral characterization resulting from left and right hemisphere injuries remains unexplored. Here we examined the functional consequences of targeting the left versus right parietal cortex in lateral fluid percussion injury, on Morris water maze (MWM) spatial memory tasks (fixed platform and reversal) and neurological motor deficits (neurological severity score and rotarod). In the MWM fixed platform task, right lateral injury produced a small delay in acquisition rate compared to left...
May 17, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28523193/mechanisms-underlying-the-antidepressant-response-of-acupuncture-via-pka-creb-signaling-pathway
#7
Huili Jiang, Xuhui Zhang, Yu Wang, Huimin Zhang, Jing Li, Xinjing Yang, Bingcong Zhao, Chuntao Zhang, Miao Yu, Mingmin Xu, Qiuyun Yu, Xingchen Liang, Xiang Li, Peng Shi, Tuya Bao
Protein kinase A (PKA)/cAMP response element-binding (CREB) protein signaling pathway, contributing to impaired neurogenesis parallel to depressive-like behaviors, has been identified as the crucial factor involved in the antidepressant response of acupuncture. However, the molecular mechanisms associated with antidepressant response of acupuncture, neurogenesis, and depressive-like behaviors ameliorating remain unexplored. The objective was to identify the mechanisms underlying the antidepressant response of acupuncture through PKA signaling pathway in depression rats by employing the PKA signaling pathway inhibitor H89 in in vivo experiments...
2017: Neural Plasticity
https://www.readbyqxmd.com/read/28522283/-standardised-pain-assessment-in-cognitively-impaired-nursing-home-residents-comparing-the-use-of-assessment-tools-in-dementia-care-units-and-in-integrated-care-units
#8
Rebecca Palm, Erika Sirsch, Bernhard Holle, Sabine Bartholomeyczik
BACKGROUND: A large number of nursing home residents with cognitive impairments (CI) suffer from chronic pain, which is also discussed as a reason for challenging behavior. To assess pain in people with severe CI, the use of an observational pain instrument is recommended; for people without or with mild CI the gold standard is a self-rating instrument. It is unknown whether in German nursing homes pain assessment in residents with severe CI is actually conducted using observational instruments and which instruments are used...
May 15, 2017: Zeitschrift Für Evidenz, Fortbildung und Qualität Im Gesundheitswesen
https://www.readbyqxmd.com/read/28521367/driving-problems-in-the-elderly-and-cognitively-impaired
#9
Robert Haussmann, Maria Buthut, Markus Donix
Driving ability in the elderly and cognitively impaired is of growing demographic relevance. Driving represents a complex task for which multiple central resources are needed. In mild cognitive impairment and dementia, we need to closely monitor driving ability, as it gets irrecoverably lost in the course of the disease. In normal aging, people are often able to self-regulate driving behavior with respect to their medical conditions. Some studies demonstrated that older drivers perform well compared with younger drivers...
May 18, 2017: Pharmacopsychiatry
https://www.readbyqxmd.com/read/28515161/suboptimal-maternal-iodine-intake-is-associated-with-impaired-child-neurodevelopment-at-3-years-of-age-in-the-norwegian-mother-and-child-cohort-study
#10
Marianne H Abel, Ida H Caspersen, Helle Margrete Meltzer, Margaretha Haugen, Ragnhild E Brandlistuen, Heidi Aase, Jan Alexander, Liv E Torheim, Anne-Lise Brantsæter
Background: Severe iodine deficiency in pregnancy has major effects on child neurodevelopment, but less is known about the potential consequences of mild-to-moderate deficiency and iodine supplement use.Objective: We explored the associations between maternal iodine intake and child neurodevelopment at 3 y of age and the potential impact of maternal intake of iodine from supplements on the same outcomes.Methods: This population-based prospective observational study included 48,297 mother-child pairs recruited during pregnancy from 2002 to 2008...
May 17, 2017: Journal of Nutrition
https://www.readbyqxmd.com/read/28514188/the-invisibility-of-mild-traumatic-brain-injury-impaired-cognitive-performance-as-a-silent-symptom
#11
Leore R Heim, Miaad Badar, Shahaf Edut, Lital Rachmany, Renana Baratz, Ran Lin, Aviya Elpaz, Doaa Qubty, Lior Bikovski, Vardit Rubovitch, Shaul Schreiber, Chaim G Pick
The present study was designed to tackle two notorious features of mild Traumatic Brain Injury (mTBI) - heterogeneity and invisibility - by characterizing the full scope of mTBI symptoms. Mice were exposed to brain injuries of different intensities utilizing a weight-drop model (10, 30, 50, and 70g), and subsequently subjected to a comprehensive battery of behavioral tests at different time points, and immunohistochemical examination of cortical slices. While the physiological, neurological, emotional, and motor function of mTBI mice, i...
May 17, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/28500650/aberrant-cognitive-phenotypes-and-altered-hippocampal-bdnf-expression-related-to-epigenetic-modifications-in-mice-lacking-the-post-synaptic-scaffolding-protein-shank1-implications-for-autism-spectrum-disorder
#12
A Özge Sungur, Magdalena C E Jochner, Hani Harb, Ayşe Kılıç, Holger Garn, Rainer K W Schwarting, Markus Wöhr
Autism spectrum disorder (ASD) is a class of neurodevelopmental disorders characterized by persistent deficits in social communication/interaction, together with restricted/repetitive patterns of behavior. ASD is among the most heritable neuropsychiatric conditions, and while available evidence points to a complex set of genetic factors, the SHANK gene family has emerged as one of the most promising candidates. Here, we assessed ASD-related phenotypes with particular emphasis on social behavior and cognition in Shank1 mouse mutants in comparison to heterozygous and wildtype littermate controls across development in both sexes...
May 12, 2017: Hippocampus
https://www.readbyqxmd.com/read/28499842/establishing-the-ferret-as-a-gyrencephalic-animal-model-of-traumatic-brain-injury-optimization-of-controlled-cortical-impact-procedures
#13
Susan C Schwerin, Elizabeth B Hutchinson, Kryslaine L Radomski, Kapinga P Ngalula, Carlo M Pierpaoli, Sharon L Juliano
BACKGROUND: Although rodent TBI studies provide valuable information regarding the effects of injury and recovery, an animal model with neuroanatomical characteristics closer to humans may provide a more meaningful basis for clinical translation. The ferret has a high white/gray matter ratio, gyrencephalic neocortex, and ventral hippocampal location. Furthermore, ferrets are amenable to behavioral training, have a body size compatible with pre-clinical MRI, and are cost-effective. NEW METHODS: We optimized the surgical procedure for controlled cortical impact (CCI) using 9 adult male ferrets...
May 10, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/28491898/a-cross-sectional-population-based-investigation-into-behavioral-change-in-amyotrophic-lateral-sclerosis-subphenotypes-staging-cognitive-predictors-and-survival
#14
Tom Burke, Marta Pinto-Grau, Katie Lonergan, Peter Bede, Meabhdh O'Sullivan, Mark Heverin, Alice Vajda, Russell L McLaughlin, Niall Pender, Orla Hardiman
OBJECTIVE: Amyotrophic Lateral Sclerosis (ALS) is a clinically heterogeneous neurodegenerative disorder associated with cognitive and behavioral impairment. The primary aim of this study was to identify behavioral subphenotypes in ALS using a custom designed behavioral assessment tool (Beaumont Behavioural Inventory, BBI). Secondary aims were to (1) investigate the predictive nature of cognitive assessment on behavioral change, (2) report the behavioral profile associated with the C9orf72 expansion, (3) categorize behavioral change through disease staging, and (4) to investigate the relationship between cross-sectional behavioral classification and survival...
May 2017: Annals of Clinical and Translational Neurology
https://www.readbyqxmd.com/read/28483073/gender-differences-in-behavioral-and-psychological-symptoms-of-patients-with-alzheimer-s-disease
#15
Jeeye Lee, Kang Joon Lee, Hyun Kim
Behavioral and psychological symptoms of dementia (BPSD) in patients with Alzheimer's disease have a strong correlation with cognitive impairment and impairment in activities of daily living. Although recent studies have reported that gender may play a role in BPSD, this finding was not evident in several other studies. The present study classified patients with Alzheimer's disease into groups with mild and moderate dementia to examine the gender differences in BPSD in each group. We divided a total of 125 patients diagnosed with Alzheimer's disease according to the criteria of the fifth edition of the Diagnostic and Statistic Manual of Mental Disorders (DSM-5) into groups with mild and moderate dementia...
April 2017: Asian Journal of Psychiatry
https://www.readbyqxmd.com/read/28481569/cognitive-modeling-as-an-interface-between-brain-and-behavior-measuring-the-semantic-decline-in-mild-cognitive-impairment
#16
Brendan T Johns, Vanessa Taler, David B Pisoni, Martin R Farlow, Ann Marie Hake, David A Kareken, Frederick W Unverzagt, Michael N Jones
Mild cognitive impairment (MCI) is characterised by subjective and objective memory impairment in the absence of dementia. MCI is a strong predictor for the development of Alzheimer's disease, and may represent an early stage in the disease course in many cases. A standard task used in the diagnosis of MCI is verbal fluency, where participants produce as many items from a specific category (e.g., animals) as possible. Verbal fluency performance is typically analysed by counting the number of items produced...
May 8, 2017: Canadian Journal of Experimental Psychology, Revue Canadienne de Psychologie Expérimentale
https://www.readbyqxmd.com/read/28476522/preliminary-study-of-neurodevelopmental-outcomes-and-parenting-stress-in-pediatric-mitochondrial-disease
#17
Soyong Eom, Young-Mock Lee
BACKGROUND: Little is known regarding the neuropsychological profiles of pediatric patients with mitochondrial diseases or their parents, information that is crucial for improving the quality of life (QOL) for both patients and parents. We aimed to delineate neurodevelopment and psychological comorbidity in children with mitochondrial diseases in the preliminary investigation of adequate intervention methods, better prognoses, and improved QOL for both patients and parents. METHODS: Seventy children diagnosed with mitochondrial diseases were neuropsychologically evaluated...
February 2, 2017: Pediatric Neurology
https://www.readbyqxmd.com/read/28474568/lipid-biomarkers-in-alzheimer-s-disease
#18
Amira Zarrouk, Meryam Debbabi, Maryem Bezine, El Mostafa Karym, Asmaa Badreddine, Olivier Rouaud, Thibault Moreau, Mustapha Cherkaoui-Malki, Mohamed El Ayeb, Boubker Nasser, Mohamed Hammami, Gérard Lizard
Alzheimer's disease (AD) is the most frequent form of dementia. It is characterized by three successive stages (preclinical, mild cognitive impairment (MCI), and dementia), which are determined with a panel of complementary tests including behavioral and biochemical tests and imaging methods. Currently accepted biomarkers of AD include levels of brain chemicals related to amyloid or tau, and imaging-derived estimates of the size and metabolic activity of specific brain regions. At the moment, the pathogenesis of AD is still poorly understood but some studies support a link between lipid metabolism disorders and AD...
May 4, 2017: Current Alzheimer Research
https://www.readbyqxmd.com/read/28453473/prodromal-dementia-with-lewy-bodies-and-prodromal-alzheimer-s-disease-a-comparison-of-the-cognitive-and-clinical-profiles
#19
Dilman Sadiq, Tim Whitfield, Lean Lee, Tim Stevens, Sergi Costafreda, Zuzana Walker
BACKGROUND: Dementia must be diagnosed accurately and early in the disease course to allow pathology-specific treatments to be effective. Dementia with Lewy bodies (DLB) is often misdiagnosed as Alzheimer's disease (AD), especially at the prodromal stage. OBJECTIVE: To compare the clinical and neuropsychological profiles of Mild Cognitive Impairment (MCI) patients who, at follow-up, progressed to AD (retrospectively AD-MCI) or DLB (retrospectively DLB-MCI) or remained MCI...
2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28447335/positive-alcohol-expectancies-mediate-associations-between-adhd-behaviors-and-alcohol-related-problems-among-college-students
#20
Alexis Elmore, Molly Nikolas, Will Canu
An increasing percentage of college students report being affected by ADHD behaviors, and this population is at increased risk of experiencing negative consequences associated with alcohol consumption. However, specific factors motivating alcohol consumption and contributing to negative outcomes among these individuals are not well understood. Recent work suggests alcohol expectancies may interact with ADHD behaviors to influence negative drinking-related outcomes among those with elevated inattention and/or hyperactivity-impulsivity...
April 26, 2017: Attention Deficit and Hyperactivity Disorders
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