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https://www.readbyqxmd.com/read/28340447/fronto-limbic-disconnection-in-depressed-patients-with-suicidal-ideation-a-resting-state-functional-connectivity-study
#1
Lian Du, Jinkun Zeng, Huan Liu, Dejian Tang, Huaqing Meng, Yongmei Li, Yixiao Fu
BACKGROUND: Suicidal ideation (SI) is highly prevalent and a known symptom of Major Depressive Disorder (MDD), but its underlying biological mechanisms are relatively unknown. Several studies linked suicidal ideation to dysfunctional brain circuits, specifically fronto-limbic connections. The purpose of this work was to investigate fronto-limbic disconnection in MDD patients with or without SI. METHODS: MDD patients with SI (SI, n=28) or without SI (NSI, n=20), identified by the Scale for Suicide Ideation and healthy controls (HCs, n=30) underwent resting-state functional MRI scanning...
February 21, 2017: Journal of Affective Disorders
https://www.readbyqxmd.com/read/28340321/exploring-the-relationship-between-cognition-and-functional-verbal-reasoning-in-adults-with-severe-traumatic-brain-injury-at-six-months-post-injury
#2
Petra Avramović, Belinda Kenny, Emma Power, Skye McDonald, Robyn Tate, Louise Hunt, Sheila MacDonald, Rob Heard, Leanne Togher
OBJECTIVE(S): This study aims to determine the association between cognitive impairment and functional verbal reasoning in adults with severe traumatic brain injury (TBI), at six months post-injury. METHOD(S): 38 participants with severe TBI were assessed using the four tasks on the Functional Assessment of Verbal Reasoning and Executive Strategies (FAVRES) [1] and a battery of neuropsychological tests at 6 months post injury in a cross-sectional observational study...
March 24, 2017: Brain Injury: [BI]
https://www.readbyqxmd.com/read/28339618/telomere-length-oxidative-stress-inflammation-and-bdnf-levels-in-siblings-of-patients-with-bipolar-disorder-implications-for-accelerated-cellular-aging
#3
Mirela Paiva Vasconcelos-Moreno, Gabriel Rodrigo Fries, Carolina Gubert, Bárbara Tietböhl Martins Quadros Dos Santos, Adam Fijtman, Juliana Sartori, Pamela Ferrari, Lucas Kich Grun, Mariana Migliorini Parisi, Fátima Theresinha Costa Rodrigues Guma, Florencia Maria Barbé-Tuana, Flávio Kapczinski, Adriane Ribeiro Rosa, Lakshmi N Yatham, Marcia Kauer-Sant'Anna
Background: Growing evidence supports the existence of neurobiological trait abnormalities in individuals at genetic risk for bipolar disorder. The aim of this study was to examine potential differences in brain-derived neurotrophic factor, cytokines, oxidative stress, and telomere length markers between patients with bipolar disorder, their siblings, and healthy controls. Methods: Thirty-six patients with bipolar disorder type I, 39 siblings, and 44 healthy controls were assessed...
January 30, 2017: International Journal of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28339607/gross-motor-trajectories-during-the-first-year-of-life-for-preterm-infants-with-very-low-birth-weight
#4
Yu-Han Su, Suh-Fang Jeng, Wu-Shiun Hsieh, Yu-Kang Tu, Yen-Tzu Wu, Li-Chiou Chen
Background.: Early identification of motor dysfunction in very-low-birth-weight (VLBW) preterm infants is important in order to provide early intervention. Objective.: This study was to examine the motor trajectories of VLBW preterm infants during their first year of life and to investigate the predictive ability and influencing factors of the trajectories. Design and Methods.: A total of 342 VLBW preterm infants were prospectively assessed for motor development by the Alberta Infant Motor Scales at 4, 6, 9 and 12 months and for developmental outcomes using the Bayley Scales of Infant and Toddler Development- second edition at 24 months...
February 4, 2017: Physical Therapy
https://www.readbyqxmd.com/read/28339575/histaminergic-neurotransmission-as-a-gateway-for-the-cognitive-effect-of-oleoylethanolamide-in-contextual-fear-conditioning
#5
Gustavo Provensi, Roberta Fabbri, Leonardo Munari, Alessia Costa, Elisabetta Baldi, Corrado Bucherelli, Patrizio Blandina, Maria Beatrice Passani
Background: The integrity of the brain histaminergic system is necessary for the unfolding of homeostatic and cognitive processes through the recruitment of alternative circuits with distinct temporal patterns. We recently demonstrated that the fat-sensing lipid mediator oleoylethanolamide indirectly activates histaminergic neurons to exerts its hypophagic effects. The present experiments investigated whether histaminergic neurotransmission is necessary also for the modulation of emotional memory induced by oleoylethanolamide in a contextual fear conditioning paradigm...
January 19, 2017: International Journal of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28336432/behavioral-abnormalities-and-reduced-norepinephrine-in-ep4-receptor-associated-protein-eprap-deficient-mice
#6
Risako Fujikawa, Sei Higuchi, Taichi Ikedo, Manabu Nagata, Kosuke Hayashi, Tao Yang, Takeshi Miyata, Masayuki Yokode, Manabu Minami
EP4 receptor-associated protein (EPRAP) is a newly identified molecule that regulates macrophage activation. We recently demonstrated the presence of EPRAP in the mice brain; however, little is known about the function of EPRAP in this tissue. Therefore, we investigated the role of EPRAP in behavior and emotion using behavioral analysis in mice. In this study, we subjected EPRAP-deficient (KO) mice and wild-type C57BL/6 (WT) mice to a battery of behavioral tests. EPRAP-KO mice tended to have shorter latencies to fall in the wire hang test, but had normal neuromuscular strength...
March 20, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28335457/the-epigenetic-link-between-prenatal-adverse-environments-and-neurodevelopmental-disorders
#7
REVIEW
Marija Kundakovic, Ivana Jaric
Prenatal adverse environments, such as maternal stress, toxicological exposures, and viral infections, can disrupt normal brain development and contribute to neurodevelopmental disorders, including schizophrenia, depression, and autism. Increasing evidence shows that these short- and long-term effects of prenatal exposures on brain structure and function are mediated by epigenetic mechanisms. Animal studies demonstrate that prenatal exposure to stress, toxins, viral mimetics, and drugs induces lasting epigenetic changes in the brain, including genes encoding glucocorticoid receptor (Nr3c1) and brain-derived neurotrophic factor (Bdnf)...
March 18, 2017: Genes
https://www.readbyqxmd.com/read/28335421/pamam-dendrimers-cross-the-blood-brain-barrier-when-administered-through-the-carotid-artery-in-c57bl-6j-mice
#8
Bhairavi Srinageshwar, Sarah Peruzzaro, Melissa Andrews, Kayla Johnson, Allison Hietpas, Brittany Clark, Crystal McGuire, Eric Petersen, Jordyn Kippe, Andrew Stewart, Olivia Lossia, Abeer Al-Gharaibeh, Aaron Antcliff, Rebecca Culver, Douglas Swanson, Gary Dunbar, Ajit Sharma, Julien Rossignol
Drug delivery into the central nervous system (CNS) is challenging due to the blood-brain barrier (BBB) and drug delivery into the brain overcoming the BBB can be achieved using nanoparticles such as dendrimers. The conventional cationic dendrimers used are highly toxic. Therefore, the present study investigates the role of novel mixed surface dendrimers, which have potentially less toxicity and can cross the BBB when administered through the carotid artery in mice. In vitro experiments investigated the uptake of amine dendrimers (G1-NH₂ and G4-NH₂) and novel dendrimers (G1-90/10 and G4-90/10) by primary cortical cultures...
March 14, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28335009/open-chromatin-profiling-of-human-postmortem-brain-infers-functional-roles-for-non-coding-schizophrenia-loci
#9
John F Fullard, Claudia Giambartolomei, Mads E Hauberg, Ke Xu, Georgios Voloudakis, Zhiping Shao, Christopher Bare, Joel T Dudley, Manuel Mattheisen, Nikolaos K Robakis, Vahram Haroutunian, Panos Roussos
Open chromatin provides access to DNA binding proteins for the correct spatiotemporal regulation of gene expression. Mapping chromatin accessibility has been widely used to identify the location of cis regulatory elements (CREs) including promoters and enhancers. CREs show tissue- and cell-type specificity and disease-associated variants are often enriched for CREs in the tissues and cells that pertain to a given disease. To better understand the role of CREs in neuropsychiatric disorders we applied the Assay for Transposase Accessible Chromatin followed by sequencing (ATAC-seq) to neuronal and non-neuronal nuclei isolated from frozen postmortem human brain by fluorescence-activated nuclear sorting (FANS)...
March 14, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/28335005/tdp-43-suppresses-tau-expression-via-promoting-its-mrna-instability
#10
Jianlan Gu, Feng Wu, Wen Xu, Jianhua Shi, Wen Hu, Nana Jin, Wei Qian, Xinglong Wang, Khalid Iqbal, Cheng-Xin Gong, Fei Liu
In the brains of individuals with Alzheimer's disease (AD) and chronic traumatic encephalopathy, tau pathology is accompanied usually by intracellular aggregation of transactive response DNA-binding protein 43 (TDP-43). However, the role of TDP-43 in tau pathogenesis is not understood. Here, we investigated the role of TDP-43 in tau expression in vitro and in vivo. We found that TDP-43 suppressed tau expression by promoting its mRNA instability through the UG repeats of its 3΄-untranslated region (3΄-UTR)...
March 15, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28334990/insulin-resistance-and-exendin-4-treatment-for-multiple-system-atrophy
#11
Fares Bassil, Marie-Hélène Canron, Anne Vital, Erwan Bezard, Yazhou Li, Nigel H Greig, Seema Gulyani, Dimitrios Kapogiannis, Pierre-Olivier Fernagut, Wassilios G Meissner
Multiple system atrophy is a fatal sporadic adult-onset neurodegenerative disorder with no symptomatic or disease-modifying treatment available. The cytopathological hallmark of multiple system atrophy is the accumulation of α-synuclein aggregates in oligodendrocytes, forming glial cytoplasmic inclusions. Impaired insulin/insulin-like growth factor-1 signalling (IGF-1) and insulin resistance (i.e. decreased insulin/IGF-1) have been reported in other neurodegenerative disorders such as Alzheimer's disease. Increasing evidence also suggests impaired insulin/IGF-1 signalling in multiple system atrophy, as corroborated by increased insulin and IGF-1 plasma concentrations in multiple system atrophy patients and reduced IGF-1 brain levels in a transgenic mouse model of multiple system atrophy...
March 14, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/28334972/enrichment-methods-provide-a-feasible-approach-to-comprehensive-and-adequately-powered-investigations-of-the-brain-methylome
#12
Robin F Chan, Andrey A Shabalin, Lin Y Xie, Daniel E Adkins, Min Zhao, Gustavo Turecki, Shaunna L Clark, Karolina A Aberg, Edwin J C G van den Oord
Methylome-wide association studies are typically performed using microarray technologies that only assay a very small fraction of the CG methylome and entirely miss two forms of methylation that are common in brain and likely of particular relevance for neuroscience and psychiatric disorders. The alternative is to use whole genome bisulfite (WGB) sequencing but this approach is not yet practically feasible with sample sizes required for adequate statistical power. We argue for revisiting methylation enrichment methods that, provided optimal protocols are used, enable comprehensive, adequately powered and cost-effective genome-wide investigations of the brain methylome...
February 25, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28334956/prune-is-crucial-for-normal-brain-development-and-mutated-in-microcephaly-with-neurodevelopmental-impairment
#13
Massimo Zollo, Mustafa Ahmed, Veronica Ferrucci, Vincenzo Salpietro, Fatemeh Asadzadeh, Marianeve Carotenuto, Reza Maroofian, Ahmed Al-Amri, Royana Singh, Iolanda Scognamiglio, Majid Mojarrad, Luca Musella, Angela Duilio, Angela Di Somma, Ender Karaca, Anna Rajab, Aisha Al-Khayat, Tribhuvan Mohan Mohapatra, Atieh Eslahi, Farah Ashrafzadeh, Lettie E Rawlins, Rajniti Prasad, Rashmi Gupta, Preeti Kumari, Mona Srivastava, Flora Cozzolino, Sunil Kumar Rai, Maria Monti, Gaurav V Harlalka, Michael A Simpson, Philip Rich, Fatema Al-Salmi, Michael A Patton, Barry A Chioza, Stephanie Efthymiou, Francesca Granata, Gabriella Di Rosa, Sarah Wiethoff, Eugenia Borgione, Carmela Scuderi, Kshitij Mankad, Michael G Hanna, Piero Pucci, Henry Houlden, James R Lupski, Andrew H Crosby, Emma L Baple
PRUNE is a member of the DHH (Asp-His-His) phosphoesterase protein superfamily of molecules important for cell motility, and implicated in cancer progression. Here we investigated multiple families from Oman, India, Iran and Italy with individuals affected by a new autosomal recessive neurodevelopmental and degenerative disorder in which the cardinal features include primary microcephaly and profound global developmental delay. Our genetic studies identified biallelic mutations of PRUNE1 as responsible. Our functional assays of disease-associated variant alleles revealed impaired microtubule polymerization, as well as cell migration and proliferation properties, of mutant PRUNE...
February 28, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/28334933/disrupted-in-schizophrenia-1is-essential-for-normal-hypothalamic-pituitary-interrenal-hpi-axis-function
#14
Helen Eachus, Charlotte Bright, Vincent T Cunliffe, Marysia Placzek, Jonathan D Wood, Penelope J Watt
Psychiatric disorders arise due to an interplay of genetic and environmental factors, including stress. Studies in rodents have shown that mutants for Disrupted-In-Schizophrenia-1 (DISC1), a well-accepted genetic risk factor for mental illness, display abnormal behaviours in response to stress, but the mechanisms through which DISC1 affects stress responses remain poorly understood. Using two lines of zebrafish homozygous mutant for disc1, we investigated behaviour and functioning of the hypothalamic-pituitary-interrenal (HPI) axis, the fish equivalent of the hypothalamic-pituitary-adrenal (HPA) axis...
March 1, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/28334907/a-combinatorial-approach-to-identify-calpain-cleavage-sites-in-the-machado-joseph-disease-protein-ataxin-3
#15
Jonasz J Weber, Matthias Golla, Giambattista Guaitoli, Pimthanya Wanichawan, Stefanie N Hayer, Stefan Hauser, Ann-Christin Krahl, Maike Nagel, Sebastian Samer, Eleonora Aronica, Cathrine R Carlson, Ludger Schöls, Olaf Riess, Christian J Gloeckner, Huu P Nguyen, Jeannette Hübener-Schmid
Ataxin-3, the disease protein in Machado-Joseph disease, is known to be proteolytically modified by various enzymes including two major families of proteases, caspases and calpains. This processing results in the generation of toxic fragments of the polyglutamine-expanded protein. Although various approaches were undertaken to identify cleavage sites within ataxin-3 and to evaluate the impact of fragments on the molecular pathogenesis of Machado-Joseph disease, calpain-mediated cleavage of the disease protein and the localization of cleavage sites remained unclear...
March 8, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/28334875/white-matter-changes-in-paediatric-multiple-sclerosis-and-monophasic-demyelinating-disorders
#16
Giulia Longoni, Robert A Brown, Parya MomayyezSiahkal, Colm Elliott, Sridar Narayanan, Amit Bar-Or, Ruth Ann Marrie, E Ann Yeh, Massimo Filippi, Brenda Banwell, Douglas L Arnold
Most children who experience an acquired demyelinating syndrome of the central nervous system will have a monophasic disease course, with no further clinical or radiological symptoms. A subset will be diagnosed with multiple sclerosis, a life-long disorder. Using linear mixed effects models we examined longitudinal diffusion properties of normal-appearing white matter in 505 serial scans of 132 paediatric participants with acquired demyelinating syndromes followed for a median of 4.4 years, many from first clinical presentation, and 106 scans of 80 healthy paediatric participants...
March 14, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/28334861/defective-signaling-through-plexin-a1-compromises-the-development-of-the-peripheral-olfactory-system-and-neuroendocrine-reproductive-axis-in-mice
#17
Séverine Marcos, Carine Monnier, Xavier Rovira Algans, Corinne Fouveaut, Nelly Pitteloud, Fabrice Ango, Catherine Dodé, Jean-Pierre Hardelin
The olfacto-genital syndrome (Kallmann syndrome) associates congenital hypogonadism due to gonadotropin-releasing hormone (GnRH) deficiency and anosmia. This is a genetically heterogeneous developmental disease with various modes of transmission, including oligogenic inheritance. Previous reports have involved defective cell signaling by semaphorin-3A in the disease pathogenesis. Here, we report that the embryonic phenotype of Plxna1-/- mutant mice lacking plexin-A1 (a major receptor of class 3 semaphorins), though not fully penetrant, resembles that of Kallmann syndrome fetuses...
March 2, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/28334860/genetic-regulation-of-gene-expression-in-the-epileptic-human-hippocampus
#18
Nasir Mirza, Richard Appleton, Sasha Burn, Daniel du Plessis, Roderick Duncan, Jibril Osman Farah, Bjarke Feenstra, Anders Hviid, Vivek Josan, Rajiv Mohanraj, Arif Shukralla, Graeme J Sills, Anthony G Marson, Munir Pirmohamed
Epilepsy is a serious and common neurological disorder. Expression quantitative loci (eQTL) analysis is a vital aid for the identification and interpretation of disease-risk loci. Many eQTLs operate in a tissue- and condition-specific manner. We have performed the first genome-wide cis-eQTL analysis of human hippocampal tissue to include not only normal (n = 22) but also epileptic (n = 22) samples. We demonstrate that disease-associated variants from an epilepsy GWAS meta-analysis and a febrile seizures (FS) GWAS are significantly more enriched with epilepsy-eQTLs than with normal hippocampal eQTLs from two larger independent published studies...
March 3, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/28334675/exercise-increases-serum-brain-derived-neurotrophic-factor-in-patients-with-major-depressive-disorder
#19
A Kerling, M Kück, U Tegtbur, L Grams, S Weber-Spickschen, A Hanke, B Stubbs, K G Kahl
BACKGROUND: Brain derived neurotrophic factor (BDNF) has been implicated in the pathogenesis of major depressive disorder (MDD). Existing data on exercise treatment in people with MDD are inconsistent concerning the effect of exercise on BDNF pointing either to increased or unaltered BDNF concentrations. However, studies in non-depressed persons demonstrated a significant effect on resting peripheral BDNF concentrations in aerobic training interventions. Given the lack of clarity mentioned above, the current study aimed at examining the effect of adjunctive exercise on serum BDNF levels in guideline based treated patients with MDD...
March 18, 2017: Journal of Affective Disorders
https://www.readbyqxmd.com/read/28334615/the-ncam1-gene-set-is-linked-to-depressive-symptoms-and-their-brain-structural-correlates-in-healthy-individuals
#20
Jana Petrovska, David Coynel, Matthias Fastenrath, Annette Milnik, Bianca Auschra, Tobias Egli, Leo Gschwind, Francina Hartmann, Eva Loos, Klara Sifalakis, Christian Vogler, Dominique J-F de Quervain, Andreas Papassotiropoulos, Angela Heck
Depressive symptoms exist on a continuum, the far end of which is found in depressive disorders. Utilizing the continuous spectrum of depressive symptoms may therefore contribute to the understanding of the biological underpinnings of depression. Gene set enrichment analysis (GSEA) is an important tool for the identification of gene groups linked to complex traits, and was applied in the present study on genome-wide association study (GWAS) data of depression scores and their brain-level structural correlates in healthy young individuals...
March 6, 2017: Journal of Psychiatric Research
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