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https://www.readbyqxmd.com/read/28089846/modulation-of-neuroinflammation-and-pathology-in-the-5xfad-mouse-model-of-alzheimer-s-disease-using-a-biased-and-selective-beta-1-adrenergic-receptor-partial-agonist
#1
Pooneh Memar Ardestani, Andrew K Evans, Bitna Yi, Tiffany Nguyen, Laurence Coutellier, Mehrdad Shamloo
Degeneration of noradrenergic neurons occurs at an early stage of Alzheimer's Disease (AD). The noradrenergic system regulates arousal and learning and memory, and has been implicated in regulating neuroinflammation. Loss of noradrenergic tone may underlie AD progression at many levels. We have previously shown that acute administration of a partial agonist of the beta-1 adrenergic receptor (ADRB1), xamoterol, restores behavioral deficits in a mouse model of AD. The current studies examined the effects of chronic low dose xamoterol on neuroinflammation, pathology, and behavior in the pathologically aggressive 5XFAD transgenic mouse model of AD...
January 12, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/28088900/synaptic-plasticity-dementia-and-alzheimer-disease
#2
Pietro Giusti, Stephen D Skaper, Laura Facci, Morena Zusso
Neuroplasticity is not only shaped by learning and memory but is also a mediator of responses to neuron attrition and injury (compensatory plasticity). As an ongoing process it reacts to neuronal cell activity and injury, death, and genesis, which encompasses the modulation of structural and functional processes of axons, dendrites, and synapses. The range of structural elements that comprise plasticity includes long-term potentiation (a cellular correlate of learning and memory), synaptic efficacy and remodelling, synaptogenesis, axonal sprouting and dendritic remodelling, and neurogenesis and recruitment...
January 13, 2017: CNS & Neurological Disorders Drug Targets
https://www.readbyqxmd.com/read/28088062/a-retrospective-audit-of-bacterial-culture-results-of-donated-human-milk-in-perth-western-australia
#3
Yahya Almutawif, Benjamin Hartmann, Megan Lloyd, Wendy Erber, Donna Geddes
INTRODUCTION: The bacterial content of donated human milk is either endogenous or introduced via contamination. Defining milk bank bacterial content will allow researchers to devise appropriate tests for significant and commonly encountered organisms. OBJECTIVE: A retrospective audit was conducted on data recorded from the Perron Rotary Express Milk Bank, King Edward Memorial Hospital, Subiaco, Western Australia. This aimed to describe the incidence of bacterial species detected in donated human milk and to identify potentially pathogenic bacteria...
January 11, 2017: Early Human Development
https://www.readbyqxmd.com/read/28087940/the-memory-immune-response-to-tuberculosis
#4
Joanna R Kirman, Marcela I Henao-Tamayo, Else Marie Agger
Immunological memory is a central feature of the adaptive immune system and a prerequisite for generating effective vaccines. Understanding long-term memory responses to Mycobacterium tuberculosis will thus provide us with valuable insights that can guide us in the search for a novel vaccine against tuberculosis (TB). For many years, triggering CD4 T cells and, in particular, those secreting interferon-γ has been the goal of most TB vaccine research, and numerous data from animals and humans support the key role of this subset in protective immunity...
December 2016: Microbiology Spectrum
https://www.readbyqxmd.com/read/28087671/induction-and-differentiation-of-il-10-producing-regulatory-b-cells-from-healthy-blood-donors-and-rheumatoid-arthritis-patients
#5
Zsuzsanna Bankó, Judit Pozsgay, Dániel Szili, Mária Tóth, Tamás Gáti, György Nagy, Bernadette Rojkovich, Gabriella Sármay
The most important feature of B cells is the production of Abs upon activation; additionally, B cells produce pro- and anti-inflammatory cytokines in response to certain stimuli. IL-10-producing B cells represent a major subset of regulatory B cells (Bregs) that suppress autoimmune and inflammatory responses. B cells play a crucial role in the development and maintenance of the chronic inflammatory autoimmune disease rheumatoid arthritis (RA); however, controversial data are available on IL-10- producing Bregs in RA...
January 13, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28087667/prmt5-selective-inhibitors-suppress-inflammatory-t-cell-responses-and-experimental-autoimmune-encephalomyelitis
#6
Lindsay M Webb, Stephanie A Amici, Kyle A Jablonski, Himanshu Savardekar, Amanda R Panfil, Linsen Li, Wei Zhou, Kevin Peine, Vrajesh Karkhanis, Eric M Bachelder, Kristy M Ainslie, Patrick L Green, Chenglong Li, Robert A Baiocchi, Mireia Guerau-de-Arellano
In the autoimmune disease multiple sclerosis and its animal model, experimental autoimmune encephalomyelitis (EAE), expansion of pathogenic, myelin-specific Th1 cell populations drives active disease; selectively targeting this process may be the basis for a new therapeutic approach. Previous studies have hinted at a role for protein arginine methylation in immune responses, including T cell-mediated autoimmunity and EAE. However, a conclusive role for the protein arginine methyltransferase (PRMT) enzymes that catalyze these reactions has been lacking...
January 13, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28087242/brains-for-birds-and-babies-neural-parallels-between-birdsong-and-speech-acquisition
#7
REVIEW
Jonathan Prather, Kazuo Okanoya, Johan J Bolhuis
Language as a computational cognitive mechanism appears to be unique to the human species. However, there are remarkable behavioral similarities between song learning in songbirds and speech acquisition in human infants that are absent in non-human primates. Here we review important neural parallels between birdsong and speech. In both cases there are separate but continually interacting neural networks that underlie vocal production, sensorimotor learning, and auditory perception and memory. As in the case of human speech, neural activity related to birdsong learning is lateralized, and mirror neurons linking perception and performance may contribute to sensorimotor learning...
January 10, 2017: Neuroscience and Biobehavioral Reviews
https://www.readbyqxmd.com/read/28086979/b-cell-repertoires-in-hla-sensitized-kidney-transplant-candidates-undergoing-desensitization-therapy
#8
John F Beausang, H Christina Fan, Rene Sit, Maria U Hutchins, Kshama Jirage, Rachael Curtis, Edward Hutchins, Stephen R Quake, Julie M Yabu
BACKGROUND: Kidney transplantation is the most effective treatment for end-stage renal disease. Sensitization refers to pre-existing antibodies against human leukocyte antigen (HLA) protein and remains a major barrier to successful transplantation. Despite implementation of desensitization strategies, many candidates fail to respond. Our objective was to determine whether measuring B cell repertoires could differentiate candidates that respond to desensitization therapy. METHODS: We developed an assay based on high-throughput DNA sequencing of the variable domain of the heavy chain of immunoglobulin genes to measure changes in B cell repertoires in 19 highly HLA-sensitized kidney transplant candidates undergoing desensitization and 7 controls with low to moderate HLA sensitization levels...
January 13, 2017: Journal of Translational Medicine
https://www.readbyqxmd.com/read/28081174/definition-of-human-epitopes-recognized-in-tetanus-toxoid-and-development-of-an-assay-strategy-to-detect-ex-vivo-tetanus-cd4-t-cell-responses
#9
Ricardo da Silva Antunes, Sinu Paul, John Sidney, Daniela Weiskopf, Jennifer M Dan, Elizabeth Phillips, Simon Mallal, Shane Crotty, Alessandro Sette, Cecilia S Lindestam Arlehamn
Despite widespread uses of tetanus toxoid (TT) as a vaccine, model antigen and protein carrier, TT epitopes have been poorly characterized. Herein we defined the human CD4+ T cell epitope repertoire by reevaluation of previously described epitopes and evaluation of those derived from prediction of HLA Class II binding. Forty-seven epitopes were identified following in vitro TT stimulation, with 28 epitopes accounting for 90% of the total response. Despite this diverse range of epitopes, individual responses were associated with only a few immunodominant epitopes, with each donor responding on average to 3 epitopes...
2017: PloS One
https://www.readbyqxmd.com/read/28079600/acute-administration-of-cyclosporine-a-does-not-impair-attention-or-memory-performance-in-healthy-men
#10
Anna L Kahl, Julia Kirchhof, Anna Füting, Bernd-Otto Hütter, Benjamin Wilde, Oliver Witzke, Sven Benson, Martin Hadamitzky, Manfred Schedlowski
There is clinical and experimental evidence that treatment with immunosuppressive and antiproliferative drugs such as the calcineurin inhibitor cyclosporine A (CsA) is associated with mental health problems and neuropsychological disturbances in patients. However, it remains unclear whether and to what extent cognitive functions such as memory and attention processes are affected by the pharmacological treatment. This is partly because of the fact that it is difficult to refer the observed neuropsychological disturbances in patients to the drug itself, to drug-induced immune suppression, or to interaction with other medication or comorbidities...
January 11, 2017: Behavioural Pharmacology
https://www.readbyqxmd.com/read/28078977/emotion-cognition-interaction-in-nonhuman-primatescognitive-avoidance-of-negative-stimuli-in-baboons-papio-papio
#11
Isabelle Blanchette, Yousri Marzouki, Nicolas Claidière, Julie Gullstrand, Joël Fagot
It is well established that emotion and cognition interact in humans, but such an interaction has not been extensively studied in nonhuman primates. We investigated whether emotional value can affect nonhuman primates' processing of stimuli that are only mentally represented, not visually available. In a short-term memory task, baboons memorized the location of two target squares of the same color, which were presented with a distractor of a different color. Through prior long-term conditioning, one of the two colors had acquired a negative valence...
January 2017: Psychological Science
https://www.readbyqxmd.com/read/28078614/resistance-exercise-reduces-seizure-occurrence-attenuates-memory-deficits-and-restores-bdnf-signaling-in-rats-with-chronic-epilepsy
#12
Alexandre Aparecido de Almeida, Sérgio Gomes da Silva, Glauber Menezes Lopim, Diego Vannucci Campos, Jansen Fernandes, Francisco Romero Cabral, Ricardo Mario Arida
Epilepsy is a disease characterized by recurrent, unprovoked seizures. Cognitive impairment is an important comorbidity of chronic epilepsy. Human and animal model studies of epilepsy have shown that aerobic exercise induces beneficial structural and functional changes and reduces the number of seizures. However, little is yet understood about the effects of resistance exercise on epilepsy. We evaluated the effects of a resistance exercise program on the number of seizures, long-term memory and expression/activation of signaling proteins in rats with epilepsy...
January 11, 2017: Neurochemical Research
https://www.readbyqxmd.com/read/28078243/ethnobotanical-knowledge-of-apiaceae-family-in-iran-a-review
#13
REVIEW
Mohammad Sadegh Amiri, Mohammad Reza Joharchi
OBJECTIVE: Apiaceae (Umbelliferae) family is one of the biggest plant families on the earth. Iran has a huge diversity of Apiaceae members. This family possesses a range of compounds that have many biological activities. The members of this family are well known as vegetables, culinary and medicinal plants. Here, we present a review of ethnobotanical uses of Apiaceae plants by the Iranian people in order to provide a comprehensive documentation for future investigations. MATERIALS AND METHODS: We checked scientific studies published in books and journals in various electronic databases (Medline, PubMed, Science Direct, Scopus and Google Scholar websites) from 1937 to 2015 and reviewed a total of 52 publications that provided information about different applications of these plant species in human and livestock...
November 2016: Avicenna Journal of Phytomedicine
https://www.readbyqxmd.com/read/28077721/temporal-expectations-guide-dynamic-prioritization-in-visual-working-memory-through-attenuated-%C3%AE-oscillations
#14
Freek van Ede, Marcel Niklaus, Anna C Nobre
: Although working memory is generally considered a highly dynamic mnemonic store, popular laboratory tasks used to understand its psychological and neural mechanisms (such as change detection and continuous reproduction) often remain relatively "static," involving the retention of a set number of items throughout a shared delay interval. In the current study, we investigated visual working memory in a more dynamic setting, and assessed the following: (1) whether internally guided temporal expectations can dynamically and reversibly prioritize individual mnemonic items at specific times at which they are deemed most relevant; and (2) the neural substrates that support such dynamic prioritization...
January 11, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28077711/phase-amplitude-coupling-and-long-range-phase-synchronization-reveal-frontotemporal-interactions-during-visual-working-memory
#15
Jonathan Daume, Thomas Gruber, Andreas K Engel, Uwe Friese
: It has been suggested that cross-frequency phase-amplitude coupling (PAC), particularly in temporal brain structures, serves as a neural mechanism for coordinated working memory storage. In this magnetoencephalography study, we show that during visual working memory maintenance, temporal cortex regions, which exhibit enhanced PAC, interact with prefrontal cortex via enhanced low-frequency phase synchronization. Healthy human participants were engaged in a visual delayed match-to-sample task with pictures of natural objects...
January 11, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28077709/semantic-congruence-accelerates-the-onset-of-the-neural-signals-of-successful-memory-encoding
#16
Pau A Packard, Antoni Rodríguez-Fornells, Nico Bunzeck, Berta Nicolás, Ruth de Diego-Balaguer, Lluís Fuentemilla
: As the stream of experience unfolds, our memory system rapidly transforms current inputs into long-lasting meaningful memories. A putative neural mechanism that strongly influences how input elements are transformed into meaningful memory codes relies on the ability to integrate them with existing structures of knowledge or schemas. However, it is not yet clear whether schema-related integration neural mechanisms occur during online encoding. In the current investigation, we examined the encoding-dependent nature of this phenomenon in humans...
January 11, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28077418/a-novel-humanized-mouse-model-with-significant-improvement-of-class-switched-antigen-specific-antibody-production
#17
Hua Yu, Chiara Borsotti, Jean-Nicolas Schickel, Shu Zhu, Till Strowig, Elizabeth E Eynon, Davor Frleta, Cagan Gurer, Andrew J Murphy, George D Yancopoulos, Eric Meffre, Markus G Manz, Richard A Flavell
Humanized mice are a powerful tool for the study of human hematopoiesis and immune function in vivo. However, the existing models cannot support robust adaptive immune responses, especially the generation of class-switched, antigen-specific antibody responses. Here we describe a new mouse strain, in which human IL6 gene encoding the cytokine that is important for B and T cell differentiation was knocked into its respective mouse locus. The provision of human IL6 not only enhanced thymopoiesis and periphery T-cell engraftment, but also significantly increased class switched memory B cells and serum IgG...
January 11, 2017: Blood
https://www.readbyqxmd.com/read/28074533/netrin-g1-its-downregulation-in-the-nucleus-accumbens-of-cocaine-conditioned-mice-and-genetic-association-in-human-cocaine-dependence
#18
Sabah Kelaï, Nicolas Ramoz, Jean-Marie Moalic, Florence Noble, Naguib Mechawar, Sandrine Imbeaud, Gustavo Turecki, Michel Simonneau, Philip Gorwood, Gilles Maussion
Netrin G1 is a presynaptic ligand involved in axonal projection. Although molecular mechanisms underlying cocaine addiction are still poorly understood, Netrin G1 might have a role as a regulator of anxiety, fear and spatial memory, behavioural traits impaired in the context of cocaine exposure. In this study, the Netrin G1 (Ntng1) expression was investigated in the nucleus accumbens of mice primarily conditioned to cocaine using a place preference paradigm. A genetic association study was then conducted on 146 multiplex families of the Collaborative study on Genetics of Alcoholism, in which seven single nucleotide polymorphisms located in the NTNG1 gene were genotyped...
January 11, 2017: Addiction Biology
https://www.readbyqxmd.com/read/28074268/cognitive-deficits-in-patients-with-a-chronic-vestibular-failure
#19
Pauline Popp, Melanie Wulff, Kathrin Finke, Maxine Rühl, Thomas Brandt, Marianne Dieterich
Behavioral studies in rodents and humans have demonstrated deficits of spatial memory and orientation in bilateral vestibular failure (BVF). Our aim was to explore the functional consequences of chronic vestibular failure on different cognitive domains including spatial as well as non-spatial cognitive abilities. Sixteen patients with a unilateral vestibular failure (UVF), 18 patients with a BVF, and 17 healthy controls (HC) participated in the study. To assess the cognitive domains of short-term memory, executive function, processing speed and visuospatial abilities the following tests were used: Theory of Visual Attention (TVA), TAP Alertness and Visual Scanning, the Stroop Color-Word, and the Corsi Block Tapping Test...
January 10, 2017: Journal of Neurology
https://www.readbyqxmd.com/read/28073940/vividness-of-visual-imagery-depends-on-the-neural-overlap-with-perception-in-visual-areas
#20
Nadine Dijkstra, Sander Bosch, Marcel A J van Gerven
: Research into the neural correlates of individual differences in imagery vividness point to an important role of the early visual cortex. However, there is also great fluctuation of vividness within individuals, such that only looking at differences between people necessarily obscures the picture. In this study we show that variation in moment-to-moment experienced vividness of visual imagery, within human subjects, depends on the activity of a large network of brain areas, including frontal, parietal and visual areas...
January 10, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
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