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https://www.readbyqxmd.com/read/29232209/recent-progress-in-understanding-hiv-reservoirs
#1
Hsiao-Hsuan Kuo, Mathias Lichterfeld
PURPOSE OF REVIEW: Reservoirs of HIV-1-infected cells persist long-term despite highly effective antiretroviral suppression therapy and represent the main barrier against a cure for HIV-1. This review summarizes recent advances in understanding the complexity and diversity of viral reservoir cells. RECENT FINDINGS: Latently infected memory CD4 T cells are the predominant cell compartment responsible for viral persistence, but some studies suggest that myeloid cells, and possibly hematopoietic progenitors, can also serve as long-term viral reservoirs...
December 11, 2017: Current Opinion in HIV and AIDS
https://www.readbyqxmd.com/read/29231180/realization-of-synaptic-learning-and-memory-functions-in-y2o3-based-memristive-device-fabricated-by-dual-ion-beam-sputtering
#2
Mangal Das, Amitesh Kumar, Rohit Singh, Myo Than Htay, Shaibal Mukherjee
Single synaptic device with inherent learning and memory functions is demonstrated based on a forming-free amorphous Y2O3 (yttria) memristor fabricated by dual ion beam sputtering system. Synaptic functions such as nonlinear transmission characteristics, long-term plasticity, short-term plasticity and "learning behavior" are achieved using a single synaptic device based on cost-effective metal-insulator- semiconductor (MIS) structure. A "learning behavior" function is demonstrated, for the first time in the literature, for yttria based memristor, which bears resemblance to certain memory functions of biological systems...
December 12, 2017: Nanotechnology
https://www.readbyqxmd.com/read/29230855/a-role-for-autophagy-in-long-term-spatial-memory-formation-in-male-rodents
#3
Michael J Hylin, Jing Zhao, Karthikeyan Tangavelou, Natalia S Rozas, Kimberly N Hood, Jacalyn S MacGowan, Anthony N Moore, Pramod K Dash
A hallmark of long-term memory formation is the requirement for protein synthesis. Administration of protein synthesis inhibitors impairs long-term memory formation without influencing short-term memory. Rapamycin is a specific inhibitor of target of rapamycin complex 1 (TORC1) that has been shown to block protein synthesis and impair long-term memory. In addition to regulating protein synthesis, TORC1 also phosphorylates Unc-51-like autophagy activating kinase-1 (Ulk-1) to suppress autophagy. As autophagy can be activated by rapamycin (and rapamycin inhibits long-term memory), our aim was to test the hypothesis that autophagy inhibitors would enhance long-term memory...
December 12, 2017: Journal of Neuroscience Research
https://www.readbyqxmd.com/read/29230574/pigeons-columba-livia-know-when-they-will-need-hints-prospective-metacognition-for-reference-memory
#4
Sumie Iwasaki, Sota Watanabe, Kazuo Fujita
Despite their impressive cognitive abilities, avian species have shown less evidence for metacognition than mammals. We suspect that commonly used tasks such as matching to sample might be too demanding to allow metacognitive processing within birds' working memory. Here, we examined whether pigeons could control their behavior as a function of knowledge levels on a three-item sequence learning task, a reference memory task supposedly requiring fewer working memory resources. The experiment used two types of lists differing in familiarity...
December 11, 2017: Animal Cognition
https://www.readbyqxmd.com/read/29230187/long-term-memory-updating-the-reset-of-encoding-hypothesis-in-list-method-directed-forgetting
#5
REVIEW
Bernhard Pastötter, Tobias Tempel, Karl-Heinz T Bäuml
People's memory for new information can be enhanced by cuing them to forget older information, as is shown in list-method directed forgetting (LMDF). In this task, people are cued to forget a previously studied list of items (list 1) and to learn a new list of items (list 2) instead. Such cuing typically enhances memory for the list 2 items and reduces memory for the list 1 items, which reflects effective long-term memory updating. This review focuses on the reset-of-encoding (ROE) hypothesis as a theoretical explanation of the list 2 enhancement effect in LMDF...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/29230056/the-c-terminal-tails-of-endogenous-glua1-and-glua2-differentially-contribute-to-hippocampal-synaptic-plasticity-and-learning
#6
Zikai Zhou, An Liu, Shuting Xia, Celeste Leung, Junxia Qi, Yanghong Meng, Wei Xie, Pojeong Park, Graham L Collingridge, Zhengping Jia
Long-term potentiation (LTP) and depression (LTD) at glutamatergic synapses are intensively investigated processes for understanding the synaptic basis for learning and memory, but the underlying molecular mechanisms remain poorly understood. We have made three mouse lines where the C-terminal domains (CTDs) of endogenous AMPA receptors (AMPARs), the principal mediators of fast excitatory synaptic transmission, are specifically exchanged. These mice display profound deficits in synaptic plasticity without any effects on basal synaptic transmission...
December 11, 2017: Nature Neuroscience
https://www.readbyqxmd.com/read/29230022/trained-innate-immunity-a-salient-factor-in-the-pathogenesis-of-neuroimmune-psychiatric-disorders
#7
A P Salam, A Borsini, P A Zunszain
Historically, only cells of the adaptive immune system have been considered capable of retaining memory for infectious challenges. Recently, however, cells of the innate immune system have been shown to be capable of displaying long-term functional memory following a single immunostimulatory challenge, leading to enhanced production of proinflammatory molecules upon other subsequent, and temporally distant, immunostimulatory challenges. This effect has been termed 'trained innate immunity', and is underwritten by stable epigenetic changes in immune and metabolic pathways...
December 12, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/29229383/short-term-culture-with-il-2-is-beneficial-for-potent-memory-chimeric-antigen-receptor-t-cell-production
#8
Xuhua Zhang, Xiaodong Lv, Yongping Song
Interleukin-2 (IL-2) has been extensively used to boost the body's immune cells, especially T cells. IL-2 is a cytokine that for many years was used to activate and amplify T cells. Due to its potent T cell growth-inducing functions in vitro, for many years, IL-2 was used for the culture and expansion of various T cell products, including tumor-infiltrating lymphocytes (TIL), T cell receptors T cells (TCRT), or genetically engineered cells with chimeric antigen receptors T cells (CAR T). Despite its positive effect on T cell production, the side-effect is not well studied...
December 8, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29229342/parahippocampectomy-as-a-new-surgical-approach-to-mesial-temporal-lobe-epilepsy-due-to-hippocampal-sclerosis-a-pilot-randomized-comparative-clinical-trial
#9
Mario Arturo Alonso-Vanegas, Iván D Freire Carlier, Daniel San-Juan, Alma Rosa Martínez NPsych, Carlos Trenado
BACKGROUND AND OBJECTIVE: The parahippocampal gyrus (PHG) plays an important role in the epileptogenic pathways of mTLE-HS, it´s resection could be preventing epileptic seizures with less complications. Evaluate the initial efficacy and safety of anterior temporal lobectomy (ATL), selective amygdalo-hipppocampectomy (SAH) and parahippocampectomy (PHC) surgical approaches in mTLE-HS. METHODS: This was a randomized comparative pilot clinical trial (2008-2011) that included patients with mTLE-HS who underwent: ATL, trans-T3 SAH, and trans-T3 PHC...
December 8, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/29226871/increased-serum-acylated-ghrelin-levels-in%C3%A2-patients-with-mild-cognitive-impairment
#10
Xi Cao, Min Zhu, Yan He, Wenzheng Chu, Yifeng Du, Heng Du
Ghrelin is a stomach-derived circulating hormone. In addition to its function as an orexigenic stimulant, the role of ghrelin in the consolidation of learning and memory has been implicated in recent years. However, the status of circulating acylated ghrelin (AG, that is, the functional form of ghrelin) in the symptomatic predementia stage of Alzheimer's disease (AD) has rarely been investigated. In the current study, we examined the serum levels of acylated and total ghrelin in 22 patients with mild cognitive impairment (MCI) and 30 cognitively normal controls...
December 2, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/29225748/multiple-exposures-of-sevoflurane-during-pregnancy-induces-memory-impairment-in-young-female-offspring-mice
#11
Woosuk Chung, Seunghwan Yoon, Yong Sup Shin
Background: Earlier studies have reported conflicting results regarding long-term behavioral consequences after anesthesia during the fetal period. Previous studies also suggest several factors that may explain such conflicting data. Thus, we examined the influence of age and sex on long-term behavioral consequences after multiple sevoflurane exposures during the fetal period. Methods: C57BL/6J pregnant mice received oxygen with or without sevoflurane for 2 hours at gestational day (GD) 14-16...
December 2017: Korean Journal of Anesthesiology
https://www.readbyqxmd.com/read/29224179/antidiabetic-polypill-improves-central-pathology-and-cognitive-impairment-in-a-mixed-model-of-alzheimer-s-disease-and-type-2-diabetes
#12
Carmen Infante-Garcia, Juan Jose Ramos-Rodriguez, Carmen Hierro-Bujalance, Esperanza Ortegon, Eleanor Pickett, Rosemary Jackson, Fernando Hernandez-Pacho, Tara Spires-Jones, Monica Garcia-Alloza
Type 2 diabetes (T2D) is an important risk factor to suffer dementia, being Alzheimer's disease (AD) as the most common form. Both AD and T2D are closely related to aging and with a growing elderly population it might be of relevance to explore new therapeutic approaches that may slow or prevent central complications associated with metabolic disorders. Therefore, we propose the use of the antidiabetic polypill (PP), a pharmacological cocktail, commonly used by T2D patients that include metformin, aspirin, simvastatin, and an angiotensin-converting enzyme inhibitor...
December 9, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/29223596/presence-and-persistence-of-the-amnesic-shellfish-poisoning-toxin-domoic-acid-in-octopus-and-cuttlefish-brains
#13
Vanessa M Lopes, Rui Rosa, Pedro R Costa
Domoic acid (DA) is a neurotoxin that causes degenerative damage to brain cells and induces permanent short-term memory loss in mammals. In cephalopod mollusks, although DA is known to accumulate primarily in the digestive gland, there is no knowledge whether DA reaches their central nervous system. Here we report, for the first time, the presence of DA in brain tissue of the common octopus (Octopus vulgaris) and the European cuttlefish (Sepia officinalis), and its absence in the brains of several squid species (Loligo vulgaris, L...
December 5, 2017: Marine Environmental Research
https://www.readbyqxmd.com/read/29222722/binaural-auditory-beats-affect-long-term-memory
#14
Miguel Garcia-Argibay, Miguel A Santed, José M Reales
The presentation of two pure tones to each ear separately with a slight difference in their frequency results in the perception of a single tone that fluctuates in amplitude at a frequency that equals the difference of interaural frequencies. This perceptual phenomenon is known as binaural auditory beats, and it is thought to entrain electrocortical activity and enhance cognition functions such as attention and memory. The aim of this study was to determine the effect of binaural auditory beats on long-term memory...
December 8, 2017: Psychological Research
https://www.readbyqxmd.com/read/29222526/numerical-value-biases-sound-localization
#15
Edward J Golob, Jörg Lewald, Stephan Getzmann, Jeffrey R Mock
Speech recognition starts with representations of basic acoustic perceptual features and ends by categorizing the sound based on long-term memory for word meaning. However, little is known about whether the reverse pattern of lexical influences on basic perception can occur. We tested for a lexical influence on auditory spatial perception by having subjects make spatial judgments of number stimuli. Four experiments used pointing or left/right 2-alternative forced choice tasks to examine perceptual judgments of sound location as a function of digit magnitude (1-9)...
December 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29222400/nkg2d-based-car-t-cells-and-radiotherapy-exert-synergistic-efficacy-in-glioblastoma
#16
Tobias Weiss, Michael Weller, Matthias Guckenberger, Charles L Sentman, Patrick Roth
Chimeric antigen receptor (CAR) T cell therapy is an emerging immunotherapy against several malignancies including glioblastoma, the most common and most aggressive malignant primary brain tumor in adults. The challenges in solid tumor immunotherapy comprise heterogenously expressed tumor target antigens and restricted trafficking of CAR T cells to and impaired long-term persistence at the tumor site, as well as the unaddressed integration of CAR T cell therapy into conventional anti-cancer treatments. We addressed these questions using a NKG2D-based chimeric antigen receptor construct (chNKG2D) in fully immunocompetent orthotopic glioblastoma mouse models...
December 8, 2017: Cancer Research
https://www.readbyqxmd.com/read/29222058/differential-expression-of-the-immediate-early-genes-c-fos-arc-egr-1-and-npas4-during-long-term-memory-formation-in-the-context-preexposure-facilitation-effect-cpfe
#17
Nicholas A Heroux, Brittany F Osborne, Lauren A Miller, Malak Kawan, Katelyn N Buban, Jeffrey B Rosen, Mark E Stanton
No abstract text is available yet for this article.
December 5, 2017: Neurobiology of Learning and Memory
https://www.readbyqxmd.com/read/29222057/unfolding-the-cognitive-map-the-role-of-hippocampal-and-extra-hippocampal-substrates-based-on-a-systems-analysis-of-spatial-processing
#18
REVIEW
Michael Ryan Hunsaker, Raymond P Kesner
What has been long absent in understanding the neural circuit that sup- ports spatial processing is a thorough description and rigorous study of the distributed neural networks associated with spatial processing-both in the human as well as in rodents. Most of our understanding regarding the elu- cidation of a spatial neural circuit has been based on rodents and therefore the present manuscript will concentrate on that literature. There is a trend emerging in research to expand beyond the hippocampus for evaluating spa- tial memory, but the thrust of the research still focuses on the role of the hippocampus as essential and other neural substrates as performing sub- servient roles to support hippocampus-dependent spatial processing...
December 5, 2017: Neurobiology of Learning and Memory
https://www.readbyqxmd.com/read/29221731/white-adipose-tissue-is-a-reservoir-for-memory-t-cells-and-promotes-protective-memory-responses-to-infection
#19
Seong-Ji Han, Arielle Glatman Zaretsky, Vinicius Andrade-Oliveira, Nicholas Collins, Amiran Dzutsev, Jahangheer Shaik, Denise Morais da Fonseca, Oliver J Harrison, Samira Tamoutounour, Allyson L Byrd, Margery Smelkinson, Nicolas Bouladoux, James B Bliska, Jason M Brenchley, Igor E Brodsky, Yasmine Belkaid
White adipose tissue bridges body organs and plays a fundamental role in host metabolism. To what extent adipose tissue also contributes to immune surveillance and long-term protective defense remains largely unknown. Here, we have shown that at steady state, white adipose tissue contained abundant memory lymphocyte populations. After infection, white adipose tissue accumulated large numbers of pathogen-specific memory T cells, including tissue-resident cells. Memory T cells in white adipose tissue expressed a distinct metabolic profile, and white adipose tissue from previously infected mice was sufficient to protect uninfected mice from lethal pathogen challenge...
November 30, 2017: Immunity
https://www.readbyqxmd.com/read/29221580/mechanisms-of-allergen-immunotherapy-for-inhaled-allergens-and-predictive-biomarkers
#20
REVIEW
Mohamed H Shamji, Stephen R Durham
Allergen immunotherapy is effective in patients with IgE-dependent allergic rhinitis and asthma. When immunotherapy is given continuously for 3 years, there is persistent clinical benefit for several years after its discontinuation. This disease-modifying effect is both antigen-specific and antigen-driven. Clinical improvement is accompanied by decreases in numbers of effector cells in target organs, including mast cells, basophils, eosinophils, and type 2 innate lymphoid cells. Immunotherapy results in the production of blocking IgG/IgG4 antibodies that can inhibit IgE-dependent activation mediated through both high-affinity IgE receptors (FcεRI) on mast cells and basophils and low-affinity IgE receptors (FcεRII) on B cells...
December 2017: Journal of Allergy and Clinical Immunology
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