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Brain, Behavior, and Immunity

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https://www.readbyqxmd.com/read/27890662/a-genetic-association-study-of-csmd1-and-csmd2-with-cognitive-function
#1
Lavinia Athanasiu, Sudheer Giddaluru, Carla Fernandes, Andrea Ivar Astri J Christoforou Reinvang Lundervold, Lars-Göran Nilsson, Karolina Kauppi, Rolf Adolfsson, Elias Eriksson, Kjetil Sundet, Srdjan Djurovic, Thomas Espeseth, Lars Nyberg, Vidar M Steen, Ole Andreassen, Stephanie Le Hellard
The complement cascade plays a role in synaptic pruning and synaptic plasticity, which seem to be involved in cognitive functions and psychiatric disorders. Genetic variants in the closely related CSMD1 and CSMD2 genes, which are implicated in complement regulation, are associated with schizophrenia. Since patients with schizophrenia often show cognitive impairments, we tested whether variants in CSMD1 and CSMD2 are also associated with cognitive functions per se. We took a discovery-replication approach, using well-characterized Scandinavian cohorts...
November 24, 2016: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/27890661/studying-brain-regulation-of-immunity-with-optogenetics-and-chemogenetics-a-new-experimental-platform
#2
REVIEW
Tamar Ben-Shaanan, Maya Schiller, Asya Rolls
The interactions between the brain and the immune system are bidirectional. Nevertheless, we have far greater understanding of how the immune system affects the brain than how the brain affects immunity. New technological developments such as optogenetics and chemogenetics (using DREADDs; Designer Receptors Exclusively Activated by Designer Drugs) can bridge this gap in our understanding, as they enable an unprecedented mechanistic and systemic analysis of the communication between the brain and the immune system...
November 24, 2016: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/27890660/the-effects-of-expressive-writing-before-or-after-punch-biopsy-on-wound-healing
#3
Hayley Robinson, Paul Jarrett, Kavita Vedhara, Elizabeth Broadbent
OBJECTIVE: Recent studies have shown that written emotional disclosure (expressive writing) performed in the two weeks prior to wounding improves healing of punch biopsy wounds. In many clinical settings, it would be more practical for patients to perform this intervention after wounding. The aim of this study was to investigate whether expressive writing could speed the healing of punch biopsy wounds if writing was performed after wounds were made. METHODS: One hundred and twenty-two healthy participants aged between 18 and 55 years were randomly allocated to one of four groups in a 2 (intervention) by 2 (timing) design...
November 24, 2016: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/27890560/the-hippocampal-transcriptomic-signature-of-stress-resilience-in-mice-with-microglial-fractalkine-receptor-cx3cr1-deficiency
#4
Neta Rimmerman, Nofar Schottlender, Ronen Reshef, Nadav Dan-Goor, Raz Yirmiya
Clinical studies suggest that key genetic factors involved in stress resilience are related to the innate immune system. In the brain, this system includes microglia cells, which play a major role in stress responsiveness. Consistently, mice with deletion of the CX3CR1 gene (CX3CR1(-/-) mice), which in the brain is expressed exclusively by microglia, exhibit resilience to chronic stress. Here, we compared the emotional, cognitive, neurogenic and microglial responses to chronic unpredictable stress (CUS) between CX3CR1(-/-) and wild type (WT) mice...
November 23, 2016: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/27888073/early-life-inflammation-with-lps-delays-fear-extinction-in-adult-rodents
#5
V M Doenni, C M Song, M N Hill, Q J Pittman
A large body of evidence has been brought forward connecting developmental immune activation to abnormal fear and anxiety levels. Anxiety disorders have extremely high lifetime prevalence, yet susceptibility factors that contribute to their emergence are poorly understood. In this research we investigated whether an inflammatory insult early in life can alter the response to fear conditioning in adulthood. Fear learning and extinction are important and adaptive behaviors, mediated largely by the amygdala and its interconnectivity with cortico-limbic circuits...
November 22, 2016: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/27884623/relationship-between-toxoplasma-gondii-seropositivity-and-acoustic-startle-response-in-an-inner-city-population
#6
Nick M Massa, Erica Duncan, Tanja Jovanovic, Kimberly Kerley, Lei Weng, Lauren Gensler, Samuel S Lee, Seth Norrholm, Abigail Powers, Lynn M Almli, Charles F Gillespie, Kerry Ressler, Bradley D Pearce
Toxoplasma gondii (TOXO) is a neuroinvasive protozoan parasite that induces the formation of persistent cysts in mammalian brains. It infects approximately 1.1 million people in the United States annually. Latent TOXO infection is implicated in the etiology of psychiatric disorders, especially schizophrenia (Scz), and has been correlated with modestly impaired cognition. The acoustic startle response (ASR) is a reflex seen in all mammals. It is mediated by a simple subcortical circuit, and provides an indicator of neural function...
November 21, 2016: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/27876552/long-term-altered-immune-responses-following-fetal-priming-in-a-non-human-primate-model-of-maternal-immune-activation
#7
Destanie R Rose, Milo Careaga, Judy Van de Water, Kim McAllister, Melissa D Bauman, Paul Ashwood
Infection during pregnancy can lead to activation of the maternal immune system and has been associated with an increased risk of having an offspring later diagnosed with a neurodevelopmental disorders (NDD) such as autism spectrum disorder (ASD) or Schizophrenia (SZ). Most maternal immune activation (MIA) studies to date have been in rodents and usually involve the use of lipopolysaccharide (LPS) or polyinosinic:polycytidylic acid (poly I:C). However, since NDD are based on behavioral changes, a model of MIA in non-human primates could potentially provide data that helps illuminate complex behavioral and immune outputs in human NDD...
November 19, 2016: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/27871802/probiotic-normalization-of-candida-albicans-in-schizophrenia-a-randomized-placebo-controlled-longitudinal-pilot-study
#8
Emily G Severance, Kristin L Gressitt, Cassie R Stallings, Emily Katsafanas, Lucy A Schweinfurth, Christina L G Savage, Maria B Adamos, Kevin M Sweeney, Andrea E Origoni, Sunil Khushalani, Faith B Dickerson, Robert H Yolken
The molecules and pathways of the gut-brain axis represent new targets for developing methods to diagnose and treat psychiatric disorders. Manipulation of the gut microbiome with probiotics may be a therapeutic strategy with the potential to relieve gastrointestinal (GI) comorbidities and improve psychiatric symptoms. Candida albicans and Saccharomyces cerevisiae, commensal yeast species, can be imbalanced in the unhealthy human microbiome, and these fungal exposures were previously found elevated in schizophrenia...
November 18, 2016: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/27865949/lost-in-translation-the-potential-psychobiotic-lactobacillus-rhamnosus-jb-1-fails-to-modulate-stress-or-cognitive-performance-in-healthy-male-subjects
#9
John R Kelly, Andrew P Allen, Andriy Temko, William Hutch, Paul J Kennedy, Niloufar Farid, Eileen Murphy, Geraldine Boylan, John Bienenstock, John F Cryan, Gerard Clarke, Timothy G Dinan
BACKGROUND: Preclinical studies have identified certain probiotics as psychobiotics - live microorganisms with a potential mental health benefit. Lactobacillus rhamnosus (JB-1) has been shown to reduce stress-related behaviour, corticosterone release and alter central expression of GABA receptors in an anxious mouse strain. However, it is unclear if this single putative psychobiotic strain has psychotropic activity in humans. Consequently, we aimed to examine if these promising preclinical findings could be translated to healthy human volunteers...
November 16, 2016: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/27865948/neuronal-fc-epsilon-receptor-i-contributes-to-antigen-evoked-pruritus-in-a-murine-model-of-ocular-allergy
#10
Fan Liu, Lubin Xu, Naze Chen, Mo Zhou, Chunyan Li, Qian Yang, Yikuan Xie, Yuguang Huang, Chao Ma
Pruritus is the major symptom of ocular allergy but currently available treatments are often ineffective. Previous studies demonstrated that subpopulations of primary sensory neurons express Fc receptors and may contribute to antigen-specific pain. We investigated the role of neuronal Fc-epsilon Receptor I (FcεRI) in allergic ocular pruritus. Ovalbumin (OVA) was used as allergen together with alum adjuvant (OVA+alum) to produce a mouse model of ocular allergy with a significant elevation in the serum levels of both antigen-specific IgE and IgG...
November 16, 2016: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/27865947/immune-responses-in-perinatal-brain-injury
#11
Jacqueline C Y Lai, Eridan Rocha-Ferreira, C Joakim Ek, Xiaoyang Wang, Henrik Hagberg, Carina Mallard
The perinatal period has often been described as immune deficient. However, it has become clear that immune responses in the neonate following exposure to microbes or as a result of tissue injury may be substantial and play a role in perinatal brain injury. In this article we will review the immune cell composition under normal physiological conditions in the perinatal period, both in the human and rodent. We will summarize evidence of the inflammatory responses to stimuli and discuss how neonatal immune activation, both in the central nervous system and in the periphery, may contribute to perinatal hypoxic-ischemic brain injury...
November 16, 2016: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/27865946/are-lower-antibody-responses-to-influenza-vaccination-in-cytomegalovirus-seropositive-older-adults-the-result-of-beta-adrenergic-blockade
#12
Graham Pawelec
No abstract text is available yet for this article.
November 16, 2016: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/27864046/acute-colitis-chronically-alters-immune-infiltration-mechanisms-and-sensory-neuro-immune-interactions
#13
Melissa A Campaniello, Chris Mavrangelos, Samuel Eade, Andrea M Harrington, L Ashley Blackshaw, Stuart M Brierley, Scott D Smid, Patrick A Hughes
OBJECTIVE: Little is understood regarding how disease progression alters immune and sensory nerve function in colitis. We investigated how acute colitis chronically alters immune recruitment and the impact this has on re-activated colitis. To understand the impact of disease progress on sensory systems we investigated the mechanisms underlying altered colonic neuro-immune interactions after acute colitis. DESIGN: Inflammation was compared in mouse models of health, acute tri-nitrobenzene sulphonic acid (TNBS) colitis, Remission and Reactivated colitis...
November 15, 2016: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/27864045/influence-of-chronic-l-dopa-treatment-on-immune-response-following-allogeneic-and-xenogeneic-graft-in-a-rat-model-of-parkinson-s-disease
#14
Ludivine S Breger, Korbinian Kienle, Gaynor A Smith, Stephen B Dunnett, Emma L Lane
Although intrastriatal transplantation of fetal cells for the treatment of Parkinson's disease had shown encouraging results in initial open-label clinical trials, subsequent double-blind studies reported more debatable outcomes. These studies highlighted the need for greater preclinical analysis of the parameters that may influence the success of cell therapy. While much of this has focused on the cells and location of the transplants, few have attempted to replicate potentially critical patient centered factors...
November 15, 2016: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/27856350/achilles-is-a-circadian-clock-controlled-gene-that-regulates-immune-function-in-drosophila
#15
Jiajia Li, Erin E Terry, Edith Fejer, Diana Gamba, Natalie Hartmann, Joseph Logsdon, Daniel Michalski, Lisa E Rois, Maria J Scuderi, Michael Kunst, Michael E Hughes
The circadian clock is a transcriptional/translational feedback loop that drives the rhythmic expression of downstream mRNAs. Termed "clock-controlled genes," these molecular outputs of the circadian clock orchestrate cellular, metabolic, and behavioral rhythms. As part of our on-going work to characterize key upstream regulators of circadian mRNA expression, we have identified a novel clock-controlled gene in Drosophila melanogaster, Achilles (Achl), which is rhythmic at the mRNA level in the brain and which represses expression of anti-microbial peptides in the immune system...
November 14, 2016: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/27856349/reparative-effects-of-interleukin-1-receptor-antagonist-in-young-and-aged-co-morbid-rodents-after-cerebral-ischemia
#16
Jesus M Pradillo, Katie N Murray, Graham A Coutts, Ana Moraga, Fernando Oroz-Gonjar, Herve Boutin, Maria A Moro, Ignacio Lizasoain, Nancy J Rothwell, Stuart M Allan
Neuroprotective strategies for ischemic stroke have failed to translate from bench to bedside, possibly due to the lack of consideration of key clinical co-morbidities. Stroke and co-morbidities are associated with raised levels of the pro-inflammatory cytokine interleukin-1 (IL-1). Inhibition of IL-1 by the administration of interleukin-1 receptor antagonist (IL-1Ra) has shown to be neuroprotective after experimental cerebral ischemia. Stroke can also trigger a robust neuroreparative response following injury, yet many of these new born neurons fail to survive or integrate into pre-existing circuits...
November 14, 2016: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/27847284/skin-colour-changes-during-experimentally-induced-sickness
#17
Audrey J Henderson, Julie Lasselin, Mats Lekander, Mats J Olsson, Simon J Powis, John Axelsson, David I Perrett
Skin colour may be an important cue to detect sickness in humans but how skin colour changes with acute sickness is currently unknown. To determine possible colour changes, 22 healthy Caucasian participants were injected twice, once with lipopolysaccharide (LPS, at a dose of 2 ng/kg body weight) and once with placebo (saline), in a randomised cross-over design study. Skin colour across 3 arm and 3 face locations was recorded spectrophotometrically over a period of 8 hours in terms of lightness (L∗), redness (a∗) and yellowness (b∗) in a manner that is consistent with human colour perception...
November 12, 2016: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/27847283/selective-dentate-gyrus-disruption-causes-memory-impairment-at-the-early-stage-of-experimental-multiple-sclerosis
#18
Vincent Planche, Aude Panatier, Bassem Hiba, Eva-Gunnel Ducourneau, Gerard Raffard, Nadège Dubourdieu, Marlène Maitre, Thierry Lesté-Lasserre, Bruno Brochet, Vincent Dousset, Aline Desmedt, Stéphane H Oliet, Thomas Tourdias
Memory impairment is an early and disabling manifestation of multiple sclerosis whose anatomical and biological substrates are still poorly understood. We thus investigated whether memory impairment encountered at the early stage of the disease could be explained by a differential vulnerability of particular hippocampal subfields. By using experimental autoimmune encephalomyelitis (EAE), a mouse model of multiple sclerosis, we identified that early memory impairment was associated with selective alteration of the dentate gyrus as pinpointed in vivo with diffusion-tensor-imaging (DTI)...
November 12, 2016: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/27847282/mesenchymal-stem-cell-derived-extracellular-vesicles-ameliorate-inflammation-induced-preterm-brain-injury
#19
Karla Drommelschmidt, Meray Serdar, Ivo Bendix, Josephine Herz, Frederik Bertling, Sebastian Prager, Matthias Keller, Anna-Kristin Ludwig, Vikas Duhan, Stefan Radtke, Kyra de Miroschedji, Peter A Horn, Yohan van de Looij, Bernd Giebel, Ursula Felderhoff-Müser
OBJECTIVE: Preterm brain injury is a major cause of disability in later life, and may result in motor, cognitive and behavioural impairment for which no treatment is currently available. The aetiology is considered as multifactorial, and one underlying key player is inflammation leading to white and grey matter injury. Extracellular vesicles secreted by mesenchymal stem/stromal cells (MSC-EVs) have shown therapeutic potential in regenerative medicine. Here, we investigated the effects of MSC-EV treatment on brain microstructure and maturation, inflammatory processes and long-time outcome in a rodent model of inflammation-induced brain injury...
November 12, 2016: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/27845195/binge-ethanol-in-adulthood-exacerbates-negative-outcomes-following-juvenile-traumatic-brain-injury
#20
Kate Karelina, Kristopher R Gaier, Maya Prabhu, Vanessa Wenger, Timothy Ed Corrigan, Zachary M Weil
Traumatic brain injuries (TBI) are a major public health problem with enormous costs in terms of health care dollars, lost productivity, and reduced quality of life. Alcohol is bidirectionally linked to TBI as many TBI patients are intoxicated at the time of their injury and we recently reported that, in accordance with human epidemiological data, animals injured during juvenile development self-administered significantly more alcohol as adults than did sham injured mice. There are also clinical data that drinking after TBI significantly reduces the efficacy of rehabilitation and leads to poorer long-term outcomes...
November 11, 2016: Brain, Behavior, and Immunity
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