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https://www.readbyqxmd.com/read/28938081/sleep-in-insects
#1
Charlotte Helfrich-Förster
Sleep is essential for proper brain function in mammals and insects. During sleep, animals are disconnected from the external world; they show high arousal thresholds and changed brain activity. Sleep deprivation results in a sleep rebound. Research using the fruit fly, Drosophila melanogaster, has helped us understand the genetic and neuronal control of sleep. Genes involved in sleep control code for ion channels, factors influencing neurotransmission and neuromodulation, and proteins involved in the circadian clock...
September 22, 2017: Annual Review of Entomology
https://www.readbyqxmd.com/read/28937707/meta-analysis-of-the-antidepressant-effects-of-acute-sleep-deprivation
#2
Elaine M Boland, Hengyi Rao, David F Dinges, Rachel V Smith, Namni Goel, John A Detre, Mathias Basner, Yvette I Sheline, Michael E Thase, Philip R Gehrman
OBJECTIVE: To provide a quantitative meta-analysis of the antidepressant effects of sleep deprivation to complement qualitative reviews addressing response rates. DATA SOURCES: English-language studies from 1974 to 2016 using the keywords sleep deprivation and depression searched through PubMed and PsycINFO databases. STUDY SELECTION: A total of 66 independent studies met criteria for inclusion: conducted experimental sleep deprivation, reported the percentage of the sample that responded to sleep deprivation, provided a priori definition of antidepressant response, and did not seamlessly combine sleep deprivation with other therapies (eg, chronotherapeutics, repetitive transcranial magnetic stimulation)...
September 19, 2017: Journal of Clinical Psychiatry
https://www.readbyqxmd.com/read/28936844/-chemical-constituents-from-ripe-fruit-of-cornus-officinalis
#3
Xian-Sheng Ye, Jun He, Jia-Lin Zhang, Xiao-Bin Pang, Lei Zhang, Hao-Yi Qiao, Xue-Ge Pan, Jia Zhang, Shu-Na Liu, Wei-Ku Zhang, Jie-Kun Xu
To investigate the chemical compounds from the fruit of Cornus officinalis, six compounds were isolated and determined by extensive spectroscopic analysis as 6'-O-acetyl-7α-O-ethyl morroniside (1), (-)-isolariciresinol 3α-O-β-D-glucopyranoside(2), apigenin (3), cirsiumaldehyde(4), p-coumaric acid (5), caffeic acid (6). Compound 1 was a new iridoid glucoside,and compounds 2-4 were obtained from the Cornus genus for the first time. Compounds 2-6 were evaluated for the viability of PC12 cells when exposed in conditions of oxygen and glucose deprivation...
December 2016: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/28936421/a-conceptual-framework-to-assess-effectiveness-in-wheelchair-provision
#4
Deepan C Kamaraj, Nathan Bray, Karen Rispin, Padmaja Kankipati, Jonathan Pearlman, Johan Borg
BACKGROUND: Currently, inadequate wheelchair provision has forced many people with disabilities to be trapped in a cycle of poverty and deprivation, limiting their ability to access education, work and social facilities. This issue is in part because of the lack of collaboration among various stakeholders who need to work together to design, manufacture and deliver such assistive mobility devices. This in turn has led to inadequate evidence about intervention effectiveness, disability prevalence and subsequent costeffectiveness that would help facilitate appropriate provision and support for people with disabilities...
2017: Afr J Disabil
https://www.readbyqxmd.com/read/28935927/effects-of-ticagrelor-in-a-mouse-model-of-ischemic-stroke
#5
Keita Yamauchi, Takahiko Imai, Masamitsu Shimazawa, Toru Iwama, Hideaki Hara
Ticagrelor is a direct acting and reversibly binding P2Y12 antagonist approved for the prevention of thromboembolic events. Its potential benefits in ischemic stroke have not been investigated sufficiently. Mice were subjected to 2 hours of transient middle cerebral artery occlusion (MCAO). Mice were orally treated with ticagrelor (10 or 30 mg/kg), aspirin (60 mg/kg), or vehicle at 3 and 24 hours before MCAO and 0 and 6 hours after reperfusion. The infarct volume and neurological deficits 22 hours after reperfusion were evaluated...
September 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28935662/adult-disinhibited-social-engagement-in-adoptees-exposed-to-extreme-institutional-deprivation-examination-of-its-clinical-status-and-functional-impact
#6
Mark Kennedy, Jana Kreppner, Nicky Knights, Robert Kumsta, Barbara Maughan, Dennis Golm, Jonathan Hill, Michael Rutter, Wolff Schlotz, Edmund Sonuga-Barke
BackgroundEarly-life institutional deprivation produces disinhibited social engagement (DSE). Portrayed as a childhood condition, little is known about the persistence of DSE-type behaviours into, presentation during, and their impact on, functioning in adulthood.AimsWe examine these issues in the young adult follow-up of the English and Romanian Adoptees study.MethodA total of 122 of the original 165 Romanian adoptees who had spent up to 43 months as children in Ceauşescu's Romanian orphanages and 42 UK adoptees were assessed for DSE behaviours, neurodevelopmental and mental health problems, and impairment between ages 2 and 25 years...
September 21, 2017: British Journal of Psychiatry: the Journal of Mental Science
https://www.readbyqxmd.com/read/28935656/the-effect-of-chronic-treatment-with-lurasidone-on-rat-liver-cytochrome-p450-expression-and-activity-in-the-chronic-mild-stress-cms-model-of-depression
#7
Marta Kot, Anna Haduch, Mariusz Papp, Władysława Anna Daniel
Recent studies indicated an important role of the monoaminergic nervous systems (dopaminergic, noradrenergic and serotonergic systems) and stress in the regulation of cytochrome P450 (CYP) expression and activity in the liver. The aim of our present research was to determine the effect of the novel atypical neuroleptic drug with antidepressant properties lurasidone, on the expression (mRNA and protein level) and activity of liver CYP isoforms involved in the metabolism of drugs and endogenous steroids, in the chronic mild stress (CMS) model of depression...
September 21, 2017: Drug Metabolism and Disposition: the Biological Fate of Chemicals
https://www.readbyqxmd.com/read/28935458/-value-based-health-care-vbhc-whence-and-wither
#8
Heiner Raspe
Since about 2005 VbHC has become a prominent movement on the border between population medicine and health economics. The "value" it is aiming at is defined as health care "outcomes per dollar spent". The text focuses on the work of two prominent proponents: M.E. Porter and J.A.M. Gray. It considers background and central elements of VbHC and discusses similarities and differences between the two authors. Especially the differences raise questions that will hopefully play a role in the German discussion that is still in its infancy...
September 18, 2017: Zeitschrift Für Evidenz, Fortbildung und Qualität Im Gesundheitswesen
https://www.readbyqxmd.com/read/28935158/socioeconomic-inequality-of-access-to-healthcare-does-choice-explain-the-gradient
#9
Giuseppe Moscelli, Luigi Siciliani, Nils Gutacker, Richard Cookson
Equity of access is a key policy objective in publicly-funded healthcare systems. However, observed inequalities of access by socioeconomic status may result from differences in patients' choices. Using data on non-emergency coronary revascularisation procedures in the English National Health Service, we found substantive differences in waiting times within public hospitals between patients with different socioeconomic status: up to 35% difference, or 43days, between the most and least deprived population quintile groups...
June 23, 2017: Journal of Health Economics
https://www.readbyqxmd.com/read/28934989/small-area-distribution-of-multiple-sclerosis-incidence-in-western-france-in-search-of-environmental-triggers
#10
Karima Hammas, Jacqueline Yaouanq, Morgane Lannes, Gilles Edan, Jean-François Viel
BACKGROUND: Despite intensive research over several decades, the etiology of multiple sclerosis (MS) remains poorly understood, although environmental factors are supposedly implicated. Our goal was to identify spatial clusters of MS incident cases at the small-area level to provide clues to local environmental risk factors that might cause or trigger the disease. METHODS: A population-based and multi-stage study was performed in the French Brittany region to accurately ascertain the clinical onset of disease during the 2000-2004 period...
September 21, 2017: International Journal of Health Geographics
https://www.readbyqxmd.com/read/28934963/metabolic-status-of-csf-distinguishes-rats-with-tauopathy-from-controls
#11
Radana Karlíková, Kateřina Mičová, Lukáš Najdekr, Alžběta Gardlo, Tomáš Adam, Petra Majerová, David Friedecký, Andrej Kováč
BACKGROUND: Tauopathies represent heterogeneous groups of neurodegenerative diseases that are characterised by abnormal deposition of the microtubule-associated protein tau. Alzheimer's disease is the most prevalent tauopathy, affecting more than 35 million people worldwide. In this study we investigated changes in metabolic pathways associated with tau-induced neurodegeneration. METHODS: Cerebrospinal fluid (CSF), plasma and brain tissue were collected from a transgenic rat model for tauopathies and from age-matched control animals...
September 21, 2017: Alzheimer's Research & Therapy
https://www.readbyqxmd.com/read/28934628/the-heat-exposure-integrated-deprivation-index-heidi-a-data-driven-approach-to-quantifying-neighborhood-risk-during-extreme-hot-weather
#12
Nikolas Krstic, Weiran Yuchi, Hung Chak Ho, Blake B Walker, Anders J Knudby, Sarah B Henderson
Mortality attributable to extreme hot weather is a growing concern in many urban environments, and spatial heat vulnerability indexes are often used to identify areas at relatively higher and lower risk. Three indexes were developed for greater Vancouver, Canada using a pool of 20 potentially predictive variables categorized to reflect social vulnerability, population density, temperature exposure, and urban form. One variable was chosen from each category: an existing deprivation index, senior population density, apparent temperature, and road density, respectively...
September 18, 2017: Environment International
https://www.readbyqxmd.com/read/28934532/preemptive-caffeine-administration-blocks-the-increase-in-postoperative-pain-caused-by-previous-sleep-loss-in-the-rat-a-potential-role-for-preoptic-adenosine-a2a-receptors-in-sleep-pain-interactions
#13
Viviane S Hambrecht-Wiedbusch, Maya Gabel, Linda J Liu, John P Imperial, Angelo V Colmenero, Giancarlo Vanini
Sleep and pain are reciprocally related, but the precise mechanisms underlying this relationship are poorly understood. This study used a rat model of surgical pain to examine the effect of previous sleep loss on postoperative pain and tested the hypothesis that preoptic adenosinergic mechanisms regulate sleep-pain interactions. Relative to ad libitum sleep, 6 hours of total sleep deprivation prior to a surgical incision significantly enhanced postoperative mechanical hypersensitivity in the affected paw and prolonged the time to recovery from surgery...
September 1, 2017: Sleep
https://www.readbyqxmd.com/read/28934530/intraindividual-increase-of-homeostatic-sleep-pressure-across-acute-and-chronic-sleep-loss-a-high-density-eeg-study
#14
Angelina Maric, Caroline Lustenberger, Esther Werth, Christian R Baumann, Rositsa Poryazova, Reto Huber
Study Objectives: To compare intraindividually the effects of acute sleep deprivation (ASD) and chronic sleep restriction (CSR) on the homeostatic increase in slow wave activity (SWA) and to relate it to impairments in basic cognitive functioning, that is, vigilance. Methods: The increase in SWA after ASD (40 hours of wakefulness) and after CSR (seven nights with time in bed restricted to 5 hours per night) relative to baseline sleep was assessed in nine healthy, male participants (age = 18-26 years) by high-density electroencephalography...
September 1, 2017: Sleep
https://www.readbyqxmd.com/read/28934338/effect-of-localized-hypoxia-on-drosophila-embryo-development
#15
Zhinan Wang, Shawn C Oppegard, David T Eddington, Jun Cheng
Environmental stress, such as oxygen deprivation, affects various cellular activities and developmental processes. In this study, we directly investigated Drosophila embryo development in vivo while cultured on a microfluidic device, which imposed an oxygen gradient on the developing embryos. The designed microfluidic device enabled both temporal and spatial control of the local oxygen gradient applied to the live embryos. Time-lapse live cell imaging was used to monitor the morphology and cellular migration patterns as embryos were placed in various geometries relative to the oxygen gradient...
2017: PloS One
https://www.readbyqxmd.com/read/28933896/the-effects-of-sleep-deprivation-on-item-and-associative-recognition-memory
#16
Roger Ratcliff, Hans P A Van Dongen
Sleep deprivation adversely affects the ability to perform cognitive tasks, but theories range from predicting an overall decline in cognitive functioning because of reduced stability in attentional networks to specific deficits in various cognitive domains or processes. We measured the effects of sleep deprivation on two memory tasks, item recognition ("was this word in the list studied") and associative recognition ("were these two words studied in the same pair"). These tasks test memory for information encoded a few minutes earlier and so do not address effects of sleep deprivation on working memory or consolidation after sleep...
September 21, 2017: Journal of Experimental Psychology. Learning, Memory, and Cognition
https://www.readbyqxmd.com/read/28933601/transcriptional-regulation-of-autophagy-and-lysosomal-function-by-bromodomain-protein-brd4
#17
Jun-Ichi Sakamaki, Kevin M Ryan
Macroautophagy/autophagy is an intracellular recycling system that delivers cytoplasmic organelles and materials to lysosomes for degradation. This process is operated by autophagy-related (ATG) genes and tightly controlled by stress-responsive signaling pathways. Our recent study revealed that autophagy programs are transcriptionally suppressed by the BET family protein BRD4. This repression is alleviated during nutrient deprivation through the AMPK-SIRT1 pathway. Our findings therefore provide new insights into the regulation of autophagy...
September 21, 2017: Autophagy
https://www.readbyqxmd.com/read/28933565/sleep-duration-nightshift-work-and-the-timing-of-meals-and-urinary-levels-of-8-isoprostane-and-6-sulfatoxymelatonin-in-japanese-women
#18
Chisato Nagata, Takashi Tamura, Keiko Wada, Kie Konishi, Yuko Goto, Yasuko Nagao, Kazuhiro Ishihara, Satoru Yamamoto
It has been hypothesized that disruption of circadian rhythms affects human health. Shift work and sleep deprivation are thought to disrupt the normal light-dark cycle, although the disruption due to shiftwork may be dependent on sleep deprivation. Both conditions have been suggested to be associated with an increased risk of cardiometabolic disorders. Non-photic environmental factors, such as the timing of eating, are also thought to regulate circadian rhythm and thus, may have effects on health, but the evidence from human studies is scarce...
September 21, 2017: Chronobiology International
https://www.readbyqxmd.com/read/28933425/carnosine-suppresses-oxygen-glucose-deprivation-recovery-induced-proliferation-and-migration-of-reactive-astrocytes-of-rats-in-vitro
#19
Li Ou-Yang, Yuan Liu, Bing-Yu Wang, Pei Cao, Jing-Jing Zhang, Yu-Yan Huang, Yao Shen, Jian-Xin Lyu
Glial scar formation resulted from excessive astrogliosis limits axonal regeneration and impairs recovery of function, thus an intervention to ameliorate excessive astrogliosis is crucial for the recovery of neurological function after cerebral ischemia. In this study we investigated the effects of carnosine, an endogenous water-soluble dipeptide (β-alanyl-L-histidine), on astrogliosis of cells exposed to oxygen-glucose deprivation/recovery (OGD/R) in vitro. Primary cultured rat astrocytes exhibited a significant increase in proliferation at 24 h recovery after OGD for 2 h...
September 21, 2017: Acta Pharmacologica Sinica
https://www.readbyqxmd.com/read/28933358/substrate-deprivation-therapy-to-reduce-glycosaminoglycan-synthesis-improves-aspects-of-neurological-and-skeletal-pathology-in-mps-i-mice
#20
Ainslie L K Derrick-Roberts, Matilda R Jackson, Carmen E Pyragius, Sharon Byers
Mucopolysaccharidosis type I (MPS I) is the most common form of the MPS group of genetic diseases. MPS I results from a deficiency in the lysosomal enzyme α-l-iduronidase, leading to accumulation of undegraded heparan and dermatan sulphate glycosaminoglycan (GAG) chains in patient cells. MPS children suffer from multiple organ failure and die in their teens to early twenties. In particular, MPS I children also suffer from profound mental retardation and skeletal disease that restricts growth and movement. Neither brain nor skeletal disease is adequately treated by current therapy approaches...
February 23, 2017: Diseases (Basel)
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