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https://www.readbyqxmd.com/read/29346589/urban-evolutionary-ecology-and-the-potential-benefits-of-implementing-genomics
#1
Christopher J Schell
Urban habitats are quickly becoming exceptional models to address adaptation under rapid environmental change, given the expansive temporal and spatial scales with which anthropogenic landscape conversion occurs. Urban ecologists in the last 10-15 years have done an extraordinary job of highlighting phenotypic patterns that correspond with urban living, as well as delineating urban population structure using traditional genetic markers. The underpinning genetic mechanisms that govern those phenotypic patterns, however, are less well established...
January 13, 2018: Journal of Heredity
https://www.readbyqxmd.com/read/29346563/lc3-immunostaining-in-the-inferior-olivary-nuclei-of-cats-with-niemann-pick-disease-type-c1-is-associated-with-patterned-purkinje-cell-loss
#2
Brittney L Gurda, Jessica H Bagel, Samantha J Fisher, Mark L Schultz, Andrew P Lieberman, Peter Hand, Charles H Vite, Gary P Swain
The feline model of Niemann-Pick disease, type C1 (NPC1) recapitulates the clinical, neuropathological, and biochemical abnormalities present in children with NPC1. The hallmarks of disease are the lysosomal storage of unesterified cholesterol and multiple sphingolipids in neurons, and the spatial and temporal distribution of Purkinje cell death. In feline NPC1 brain, microtubule-associated protein 1 light chain 3 (LC3) accumulations, indicating autophagosomes, were found within axons and presynaptic terminals...
January 13, 2018: Journal of Neuropathology and Experimental Neurology
https://www.readbyqxmd.com/read/29346554/functional-roles-of-sex-biased-growth-hormone-regulated-micrornas-mir-1948-and-mir-802-in-young-adult-mouse-liver
#3
Pengying Hao, David J Waxman
Sex-specific temporal patterns of pituitary GH secretion determine the sex-biased transcription of hundreds of genes in the liver and impart significant sex differences in liver physiology, metabolism and disease. Sex differences in hepatic gene expression vary widely, ranging from <2-fold to >1,000-fold in the mouse. Here, we use small RNA sequencing to discover 24 sex-biased mouse liver miRNAs, and then investigate the roles of two of these miRNAs in GH-regulated liver sex differences. Studies in pre-pubertal and young adult mice, and in mice where pituitary hormones are ablated or where sex-specific hepatic GH signaling is dysregulated, demonstrated that the male-biased miR-1948 and the female-biased miR-802 are both regulated by sex-specific pituitary GH secretory patterns, acquire sex specificity at puberty, and are dependent on the GH-activated transcription factor STAT5 for their sex-specific expression...
January 16, 2018: Endocrinology
https://www.readbyqxmd.com/read/29344939/socially-informed-dispersal-in-a-territorial-cooperative-breeder
#4
Gabriele Cozzi, Nino Maag, Luca Börger, Tim Clutton-Brock, Arpat Ozgul
1.Dispersal is a key process governing the dynamics of socially and spatially structured populations, and involves three distinct stages: emigration, transience, and settlement. At each stage, individuals have to make movement decisions, which are influenced by social, environmental, and individual factors. Yet, a comprehensive understanding of the drivers that influence such decisions is still lacking, particularly for the transient stage during which free-living individuals are inherently difficult to follow...
January 18, 2018: Journal of Animal Ecology
https://www.readbyqxmd.com/read/29343853/differential-tissue-specific-temporal-and-spatial-expression-patterns-of-the-aggrecan-gene-is-modulated-by-independent-enhancer-elements
#5
Ian M H Li, Ke Liu, Alice Neal, Peter D Clegg, Sarah De Val, George Bou-Gharios
The transcriptional mechanism through which chondrocytes control the spatial and temporal composition of the cartilage tissue has remained largely elusive. The central aim of this study was to identify whether transcriptional enhancers played a role in the organisation of the chondrocytes in cartilaginous tissue. We focused on the Aggrecan gene (Acan) as it is essential for the normal structure and function of cartilage and it is expressed developmentally in different stages of chondrocyte maturation. Using transgenic reporter studies in mice we identified four elements, two of which showed individual chondrocyte developmental stage specificity...
January 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29343732/the-neural-correlates-of-the-unified-percept-of-alcohol-related-craving-a-fmri-and-eeg-study
#6
Yuefeng Huang, Anusha Mohan, Dirk De Ridder, Stefan Sunaert, Sven Vanneste
Alcohol addiction is accompanied by aberrant neural activity. Previously, task-based fMRI and resting-state EEG studies have revealed that craving, a critical component of addiction, is linked to abnormal activity in cortical regions including the dorsal anterior cingulate cortex (dACC), nucleus accumbens (NAcc), posterior cingulate cortex (PCC) and pregenual anterior cingulate cortex (pgACC), etc. In this study, we combine these two imaging techniques to investigate a group of alcohol-addicted patients and provide convergent evidence for the neural correlates of craving not only in alcohol but substance abuse in general...
January 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29343686/human-brain-patterns-underlying-vigilant-attention-impact-of-sleep-debt-circadian-phase-and-attentional-engagement
#7
M Maire, C F Reichert, V Gabel, A U Viola, C Phillips, C Berthomier, S Borgwardt, C Cajochen, C Schmidt
Sleepiness and cognitive function vary over the 24-h day due to circadian and sleep-wake-dependent mechanisms. However, the underlying cerebral hallmarks associated with these variations remain to be fully established. Using functional magnetic resonance imaging (fMRI), we investigated brain responses associated with circadian and homeostatic sleep-wake-driven dynamics of subjective sleepiness throughout day and night. Healthy volunteers regularly performed a psychomotor vigilance task (PVT) in the MR-scanner during a 40-h sleep deprivation (high sleep pressure) and a 40-h multiple nap protocol (low sleep pressure)...
January 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29343575/high-resolution-sequencing-of-viral-populations-during-early-siv-infection-reveals-evolutionary-strategies-for-rapid-escape-from-emerging-env-specific-antibody-responses
#8
Sergio Ita, Alison K Hill, Evan C Lam, Fay J Dufort, Xiao Yang, Ruchi Newman, Sivan Leviyang, Ismael B Fofana, Welkin E Johnson
Primate lentiviruses, including the human and simian immunodeficiency viruses (HIV and SIV), produce infections marked by persistent, ongoing viral replication. This occurs despite the presence of virus-specific adaptive immune responses, including antibodies targeting the viral envelope glycoprotein (Env), and evolution of antibody-escape variants is a well-documented feature of lentiviral infection. Here, we examined the evolutionary dynamics of the SIV env gene during early infection (≤ 29 weeks post-infection) in a cohort of four SIVmac251-infected rhesus macaques...
January 17, 2018: Journal of Virology
https://www.readbyqxmd.com/read/29343251/effects-of-the-isoflavone-genistein-in-early-life-stages-of-the-senegalese-sole-solea-senegalensis-role-of-the-survivin-and-proliferation-versus-apoptosis-pathways
#9
Carmen Sarasquete, María Úbeda-Manzanaro, Juan B Ortiz-Delgado
BACKGROUND: Phytochemical flavonoids are widely distributed in the environment and are derived from many anthropogenic activities. The isoflavone genistein is a naturally occurring compound found in soya products that are habitual constituents of the aquafeeds. This isoflavone possesses oestrogenic biological activity and also apoptotic properties. The present study has been performed to determine the effects of the genistein in the early life stages of the flatfish Senegalese sole during the first month of larval life, and it is focused especially at the metamorphosis, analysing the expression transcript levels and the immunohistochemical protein patterns implicated in the cell proliferation and apoptosis pathways (proliferation cellular/PCNA, anti-apoptosis Survivin/BIRC-5, death receptors/Fas, and Caspases)...
January 17, 2018: BMC Veterinary Research
https://www.readbyqxmd.com/read/29342397/imaging-the-spatiotemporal-dynamics-of-cognitive-processes-at-high-temporal-resolution
#10
I Tal, M Abeles
This letter presents a noninvasive imaging technique that captures the exact timing and locations of cortical activity sequences that are specific to a cognitive process. These precise spatiotemporal sequences can be detected in the human brain as specific time-position pattern associated with a cognitive specific time-position pattern associated with a cognitive task. They are consistent with direct measurements of population activity recorded in nonhuman primates, thus suggesting that specific time-position patterns associated with a cognitive task can be identified...
January 17, 2018: Neural Computation
https://www.readbyqxmd.com/read/29342310/temporal-trends-of-sources-of-cigarettes-among-u-s-high-school-students-2001-2015
#11
Hongying Dai, Jianqiang Hao
Introduction: Restricting the supply of cigarettes to youth plays an important role in reducing youth smoking. Methods: The study included data from 8 years of the national Youth Risk Behavior Survey (YRBS) from 2001 to 2015 with 99,572 high school students less than 18 years old. Data were weighted to provide national estimates of the temporal trends of cigarette sources. Each cigarette source was analyzed by a separate multivariable logistic regression model and the linear trend odds ratio (aOR) was adjusted by age, sex, race/ethnicity, and smoking frequency...
January 12, 2018: Nicotine & Tobacco Research: Official Journal of the Society for Research on Nicotine and Tobacco
https://www.readbyqxmd.com/read/29342076/neuromorphic-vibrotactile-stimulation-of-fingertips-for-encoding-object-stiffness-in-telepresence-sensory-substitution-and-augmentation-applications
#12
Francesca Sorgini, Luca Massari, Jessica D'Abbraccio, Eduardo Palermo, Arianna Menciassi, Petar B Petrovic, Alberto Mazzoni, Maria Chiara Carrozza, Fiona N Newell, Calogero M Oddo
We present a tactile telepresence system for real-time transmission of information about object stiffness to the human fingertips. Experimental tests were performed across two laboratories (Italy and Ireland). In the Italian laboratory, a mechatronic sensing platform indented different rubber samples. Information about rubber stiffness was converted into on-off events using a neuronal spiking model and sent to a vibrotactile glove in the Irish laboratory. Participants discriminated the variation of the stiffness of stimuli according to a two-alternative forced choice protocol...
January 17, 2018: Sensors
https://www.readbyqxmd.com/read/29341457/different-effects-of-dexmedetomidine-and-midazolam-on-the-expression-of-nr2b-and-gabaa-%C3%AE-1-following-peripheral-nerve-injury-in-rats
#13
Jiayu Chen, Hanjun Li, Grewo Lim, Michael F McCabe, Wei Zhao, Yunli Yang, Weiqing Ma, Na Li
Neuropathic pain is a complex, chronic pain condition and the treatment is a major clinical challenge. Recent studies have shown that two FDA approved drugs dexmedetomidine (DEX) and midazolam (MZL), may be useful in treating neuropathic pain, but the mechanism is not fully dementated. Here, we investigated the effects and mechanisms of DEX and MZL treatment in the peripheral nerve injury model. Intramuscular injection with DEX and MZL attenuated the development of mechanical allodynia and thermal hyperalgesia in rats with chronic constriction injury (CCI)...
January 17, 2018: IUBMB Life
https://www.readbyqxmd.com/read/29341386/at-the-core-of-reasoning-dissociating-deductive-and-non-deductive-load
#14
John P Coetzee, Martin M Monti
In recent years, neuroimaging methods have been used to investigate how the human mind carries out deductive reasoning. According to some, the neural substrate of language is integral to deductive reasoning. According to others, deductive reasoning is supported by a language-independent distributed network including left frontopolar and frontomedial cortices. However, it has been suggested that activity in these frontal regions might instead reflect non-deductive factors such as working memory load and general cognitive difficulty...
January 16, 2018: Human Brain Mapping
https://www.readbyqxmd.com/read/29341344/the-medial-temporal-lobe-functional-connectivity-patterns-associated-with-forming-different-mental-representations
#15
Signy Sheldon, Brian Levine
The medial temporal lobes (MTL), and more specifically the hippocampus, are critical for forming mental representations of past experiences - autobiographical memories - and for forming other 'non-experienced' types of mental representations, such as imagined scenarios. How the MTL coordinate with other brain areas to create these different types of representations is not well understood. To address this issue, we performed a task-based functional connectivity analysis on a previously published dataset in which fMRI data were collected as participants created different types of mental representations under three conditions...
January 17, 2018: Hippocampus
https://www.readbyqxmd.com/read/29341225/past-and-present-mercury-accumulation-in-the-lake-baikal-seal-temporal-trends-effects-of-life-history-and-toxicological-implications
#16
Amanda E Poste, Mikhail V Pastukhov, Hans Fredrik Veiteberg Braaten, Ted Ozersky, Marianne Moore
Despite global efforts to reduce anthropogenic mercury (Hg) emissions, the timescale and degree to which Hg concentrations in the environment and biota respond to decreased emissions remains challenging to assess or predict. Here we characterize long-term trends, life-history patterns in Hg accumulation and toxicological implications of Hg contamination for a freshwater seal from one of the world's largest lakes (Lake Baikal, Siberia) using contemporary tissues and archival teeth. Stable isotope analysis and Hg analyses of soft tissues (muscle, liver, kidney, blood, brain, heart) and teeth from 22 contemporary seals revealed rapid changes in diet and Hg accumulation in the first year of life with a stable diet and increase in tissue Hg throughout the rest of life...
January 17, 2018: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/29340970/ultrahigh-temporal-resolution-of-visual-presentation-using-gaming-monitors-and-g-sync
#17
Christian H Poth, Rebecca M Foerster, Christian Behler, Ulrich Schwanecke, Werner X Schneider, Mario Botsch
Vision unfolds as an intricate pattern of information processing over time. Studying vision and visual cognition therefore requires precise manipulations of the timing of visual stimulus presentation. Although standard computer display technologies offer great accuracy and precision of visual presentation, their temporal resolution is limited. This limitation stems from the fact that the presentation of rendered stimuli has to wait until the next refresh of the computer screen. We present a novel method for presenting visual stimuli with ultrahigh temporal resolution (<1 ms) on newly available gaming monitors...
January 16, 2018: Behavior Research Methods
https://www.readbyqxmd.com/read/29340915/primed-and-unprimed-rebounding-illusory-apparent-motion
#18
Nicolas Davidenko, Nathan H Heller
Although sequences of uncorrelated random dots can yield a wide range of illusorily coherent motion percepts (including translation, rotation, contraction, expansion, shear, and rebounding motion), past priming studies have relied on two-alternative forced choice tasks that only measure unidirectional (positive or negative) priming effects. In Experiment 1 we showed that when participants are primed with unidirectional motion and given an additional option to report bidirectional (rebounding) motion, they do so frequently, suggesting that unidirectional motion can "default" to a rebounding percept...
January 16, 2018: Attention, Perception & Psychophysics
https://www.readbyqxmd.com/read/29340640/in-vivo-three-dimensional-lamina-cribrosa-strains-in-healthy-ocular-hypertensive-and-glaucoma-eyes-following-acute-intraocular-pressure-elevation
#19
Meghna R Beotra, Xiaofei Wang, Tin A Tun, Liang Zhang, Mani Baskaran, Tin Aung, Nicholas G Strouthidis, Michaël J A Girard
Purpose: To compare in vivo lamina cribrosa (LC) strains (deformations) following acute IOP elevation in healthy, glaucoma, and ocular hypertensive subjects. Methods: There were 20 healthy, 20 high-tension primary open-angle glaucoma (POAG), 16 primary angle-closure glaucoma (PACG), and 20 ocular hypertensive (OHT; with normal visual fields) eyes studied. For each test eye, the optic nerve head was imaged three times (at baseline IOP, following an acute elevation of IOP to approximately 35 then 45 mm Hg using an ophthalmodynamomter) using optical coherence tomography (OCT)...
January 1, 2018: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29340153/temporal-migration-patterns-between-natal-locations-of-ruby-throated-hummingbirds-archilochus-colubris-and-their-gulf-coast-stopover-site
#20
Theodore J Zenzal, Andrea J Contina, Jeffrey F Kelly, Frank R Moore
Background: Autumn latitudinal migrations generally exhibit one of two different temporal migration patterns: type 1 where southern populations migrate south before northern populations, or type 2 where northern populations overtake southern populations en route. The ruby-throated hummingbird (Archilochus colubris) is a species with an expansive breeding range, which allows opportunities to examine variation in the timing of migration. Our objective was to determine a relationship between natal origin of ruby-throated hummingbirds and arrival at a Gulf coast stopover site; and if so, what factors, such as differences in body size across the range as well as the cost of migration, might drive such a pattern...
2018: Movement Ecology
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