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https://www.readbyqxmd.com/read/28109907/circadian-gene-variants-and-breast-cancer
#1
Edyta Reszka, Monika Przybek, Olav Muurlink, Beata Peplonska
The endogenous and self-sustained circadian rhythm generated and maintained in suprachiasmatic nucleus and peripheral tissues can coordinate various molecular, biochemical and physiological processes in living organisms resulting in the adaptation to environmental cues, e.g. light. Multifactorial breast cancer etiology also involves circadian gene alterations, especially among individuals exposed to light at night. Indeed, shift work that causes circadian disruption has been classified by the International Agency for Research on Cancer as a probable human carcinogen, group 2A...
January 18, 2017: Cancer Letters
https://www.readbyqxmd.com/read/28109838/developmental-changes-and-day-night-expression-of-the-gonadotropin-inhibitory-hormone-system-in-the-european-sea-bass-effects-of-rearing-temperature
#2
José A Paullada-Salmerón, Guillaume Henri Loentgen, Mairi Cowan, María Aliaga-Guerrero, María Del Carmen Rendón-Unceta, José A Muñoz-Cueto
The role of rearing temperature on fish development, sex differentiation and puberty has been largely addressed, but the impact of water temperature on the ontogeny of the main neuroendocrine systems controlling reproduction has received little attention. Gonadotropin-inhibitory hormone (Gnih) has been shown to act on gonadotropin-releasing hormone (Gnrh) neurons and on the pituitary to inhibit gonadotropin release and synthesis in vertebrates, including sea bass, Dicentrarchus labrax. In the present study we investigated the effects of rearing temperature during the thermosensitive period (5-60days post-fertilization, dpf) on the expression of the Gnih gene (gnih) and its receptor (gnihr)...
January 18, 2017: Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology
https://www.readbyqxmd.com/read/28106237/reading-and-quality-of-life-differences-between-tecnis-zcb00-monofocal-and-tecnis-zmb00-multifocal-intraocular-lenses
#3
Francisco de Asís Bartol-Puyal, Paula Talavero, Galadriel Giménez, Irene Altemir, José M Larrosa, Vicente Polo, Luis E Pablo
PURPOSE: To compare the NEI-RQL-42 quality of life questionnaire and the Radner Vissum reading test outcomes after bilateral cataract surgery with implantation of Tecnis ZCB00 monofocal and Tecnis ZMB00 multifocal intraocular lens (IOL). METHODS: Forty-two eyes of 21 patients who had phacoemulsification were implanted with Tecnis ZCB00 IOL and 82 eyes of 41 patients were implanted with Tecnis ZMB00 IOL. They answered the NEI-RQL-42 questionnaire before cataract surgery and 3 months after it...
January 2, 2017: European Journal of Ophthalmology
https://www.readbyqxmd.com/read/28105525/characterization-of-the-cell-polarity-gene-crumbs-during-the-early-development-and-maintenance-of-the-squid-vibrio-light-organ-symbiosis
#4
Suzanne M Peyer, Elizabeth A C Heath-Heckman, Margaret J McFall-Ngai
The protein Crumbs is a determinant of apical-basal cell polarity and plays a role in apoptosis of epithelial cells and their protection against photodamage. Using the squid-vibrio system, a model for development of symbiotic partnerships, we examined the modulation of the crumbs gene in host epithelial tissues during initiation and maintenance of the association. The extracellular luminous symbiont Vibrio fischeri colonizes the apical surfaces of polarized epithelia in deep crypts of the Euprymna scolopes light organ...
January 20, 2017: Development Genes and Evolution
https://www.readbyqxmd.com/read/28105489/whisker-touch-guides-canopy-exploration-in-a-nocturnal-arboreal-rodent-the-hazel-dormouse-muscardinus-avellanarius
#5
Kendra Arkley, Guuske P Tiktak, Vicki Breakell, Tony J Prescott, Robyn A Grant
Dormouse numbers are declining in the UK due to habitat loss and fragmentation. We know that dormice are nocturnal, arboreal, and avoid crossing open spaces between habitats, yet how they navigate around their canopy is unknown. As other rodents use whisker touch sensing to navigate and explore their environment, this study investigates whether Hazel dormice (Muscardinus avellanarius) employ their whiskers to cross between habitats. We analysed high-speed video footage of dormice exploring freely in flat and climbing arenas in near darkness and using infrared light illumination...
January 20, 2017: Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
https://www.readbyqxmd.com/read/28103237/adult-tea-green-leafhoppers-empoasca-onukii-matsuda-change-behaviors-under-varying-light-conditions
#6
Longqing Shi, Liette Vasseur, Huoshui Huang, Zhaohua Zeng, Guiping Hu, Xin Liu, Minsheng You
Insect behaviors are often influenced by light conditions including photoperiod, light intensity, and wavelength. Understanding pest insect responses to changing light conditions may help with developing alternative strategies for pest control. Little is known about the behavioral responses of leafhoppers (Hemiptera: Cicadellidae) to light conditions. The behavior of the tea green leafhopper, Empoasca onukii Matsuda, was examined when exposed to different light photoperiods or wavelengths. Observations included the frequency of locomotion and cleaning activities, and the duration of time spent searching...
2017: PloS One
https://www.readbyqxmd.com/read/28099496/plasticity-of-daily-behavioral-rhythms-in-foragers-and-nurses-of-the-ant-camponotus-rufipes-influence-of-social-context-and-feeding-times
#7
Stephanie Mildner, Flavio Roces
Daily activities within an ant colony need precise temporal organization, and an endogenous clock appears to be essential for such timing processes. A clock drives locomotor rhythms in isolated workers in a number of ant species, but its involvement in activities displayed in the social context is unknown. We compared locomotor rhythms in isolated individuals and behavioral rhythms in the social context of workers of the ant Camponotus rufipes. Both forager and nurse workers exhibited circadian rhythms in locomotor activity under constant conditions, indicating the involvement of an endogenous clock...
2017: PloS One
https://www.readbyqxmd.com/read/28099477/chronic-maternal-low-protein-diet-in-mice-affects-anxiety-night-time-energy-expenditure-and-sleep-patterns-but-not-circadian-rhythm-in-male-offspring
#8
Randy F Crossland, Alfred Balasa, Rajesh Ramakrishnan, Sangeetha K Mahadevan, Marta L Fiorotto, Ignatia B Van den Veyver
Offspring of murine dams chronically fed a protein-restricted diet have an increased risk for metabolic and neurobehavioral disorders. Previously we showed that adult offspring, developmentally exposed to a chronic maternal low-protein (MLP) diet, had lower body and hind-leg muscle weights and decreased liver enzyme serum levels. We conducted energy expenditure, neurobehavioral and circadian rhythm assays in male offspring to examine mechanisms for the body-weight phenotype and assess neurodevelopmental implications of MLP exposure...
2017: PloS One
https://www.readbyqxmd.com/read/28098350/endogenous-circadian-rhythms-in-pigment-composition-induce-changes-in-photochemical-efficiency-in-plant-canopies
#9
José Ignacio García-Plazaola, Beatriz Fernández-Marín, Juan Pedro Ferrio, Josu G Alday, Günter Hoch, Damien Landais, Alexandru Milcu, David T Tissue, Jordi Voltas, Arthur Gessler, Jacques Roy, Víctor Resco de Dios
There is increasing evidence that the circadian clock is a significant driver of photosynthesis that becomes apparent when environmental cues are experimentally held constant. We studied whether the composition of photosynthetic pigments is under circadian regulation, and whether pigment oscillations lead to rhythmic changes in photochemical efficiency. To address these questions, canopies of bean and cotton were maintained, after an entrainment phase, under constant (light or darkness) conditions for 30-48 h...
January 18, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28079162/glucose-tolerance-in-mice-exposed-to-light-dark-stimulus-patterns-mirroring-dayshift-and-rotating-shift-schedules
#10
Mariana G Figueiro, Leora Radetsky, Barbara Plitnick, Mark S Rea
Glucose tolerance was measured in (nocturnal) mice exposed to light-dark stimulus patterns simulating those that (diurnal) humans would experience while working dayshift (DSS) and 2 rotating night shift patterns (1 rotating night shift per week [RSS1] and 3 rotating night shifts per week [RSS3]). Oral glucose tolerance tests were administered at the same time and light phase during the third week of each experimental session. In contrast to the RSS1 and RSS3 conditions, glucose levels reduced more quickly for the DSS condition...
January 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28074466/anatomical-organization-of-the-brain-of-a-diurnal-and-a-nocturnal-dung-beetle
#11
Esa-Ville Immonen, Marie Dacke, Stanley Heinze, Basil El Jundi
To avoid the fierce competition for food, South African ball-rolling dung beetles carve a piece of dung off a dung-pile, shape it into a ball and roll it away along a straight line path. For this unidirectional exit from the busy dung pile, at night and day, the beetles use a wide repertoire of celestial compass cues. This robust and relatively easily measurable orientation behavior has made ball-rolling dung beetles an attractive model organism for the study of the neuroethology behind insect orientation and sensory ecology...
January 11, 2017: Journal of Comparative Neurology
https://www.readbyqxmd.com/read/28071711/transient-anhedonia-phenotype-and-altered-circadian-timing-of-behaviour-during-night-time-dim-light-exposure-in-per3-mice-but-not-wildtype-mice
#12
Bruno Jacson Martynhak, Alexandra L Hogben, Panos Zanos, Polymnia Georgiou, Roberto Andreatini, Ian Kitchen, Simon N Archer, Malcolm von Schantz, Alexis Bailey, Daan R van der Veen
Industrialisation greatly increased human night-time exposure to artificial light, which in animal models is a known cause of depressive phenotypes. Whilst many of these phenotypes are 'direct' effects of light on affect, an 'indirect' pathway via altered sleep-wake timing has been suggested. We have previously shown that the Period3 gene, which forms part of the biological clock, is associated with altered sleep-wake patterns in response to light. Here, we show that both wild-type and Per3(-/-) mice showed elevated levels of circulating corticosterone and increased hippocampal Bdnf expression after 3 weeks of exposure to dim light at night, but only mice deficient for the PERIOD3 protein (Per3(-/-)) exhibited a transient anhedonia-like phenotype, observed as reduced sucrose preference, in weeks 2-3 of dim light at night, whereas WT mice did not...
January 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28069065/exploring-the-potential-of-using-cattle-for-malaria-vector-surveillance-and-control-a-pilot-study-in-western-kenya
#13
Margaret M Njoroge, Inaki Tirados, Steven W Lindsay, Glyn A Vale, Stephen J Torr, Ulrike Fillinger
BACKGROUND: Malaria vector mosquitoes with exophilic and zoophilic tendencies, or with a high acceptance of alternative blood meal sources when preferred human blood-hosts are unavailable, may help maintain low but constant malaria transmission in areas where indoor vector control has been scaled up. This residual transmission might be addressed by targeting vectors outside the house. Here we investigated the potential of insecticide-treated cattle, as routinely used for control of tsetse and ticks in East Africa, for mosquito control...
January 10, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28059259/ge-sub-0-975-sub-sn-sub-0-025-sub-320%C3%A2-%C3%A2-%C3%A3-%C3%A2-%C3%A2-256-imager-chip-for-1-6-1-9%C3%A2-%C3%A2-%C3%AE-m-infrared-vision
#14
Chiao Chang, Hui Li, Chien-Te Ku, Shih-Guo Yang, Hung Hsiang Cheng, Joshua Hendrickson, Richard A Soref, Greg Sun
We report the experimental fabrication and testing of a GeSn-based 320×256 image sensor focal plane array operating at -15°C in the 1.6-1.9 μm spectral range. For image readout, the 2D pixel array of Ge/GeSn/Ge p-i-n heterophotodiodes was flip-chip bonded to a customized silicon CMOS readout integrated circuit. The resulting camera chip was operated using back-side illumination. Successful imaging of a tungsten-filament light bulb was attained with observation of gray-scale "hot spot" infrared features not seen using a visible-light camera...
December 20, 2016: Applied Optics
https://www.readbyqxmd.com/read/28054361/the-metabolic-sensor-akin10-modulates-the-arabidopsis-circadian-clock-in-a-light-dependent-manner
#15
Jieun Shin, Alfredo Sánchez-Villarreal, Amanda M Davis, Shen-Xiu Du, Kenneth W Berendzen, Csaba Koncz, Zhaojun Ding, Cuiling Li, Seth J Davis
Plants generate rhythmic metabolism during the repetitive day/night cycle. The circadian clock produces internal biological rhythms to synchronize numerous metabolic processes such that they occur at the required time of day. Metabolism conversely influences clock function by controlling circadian period and phase, and the expression of core-clock genes. Here we show that AKIN10, a catalytic subunit of the evolutionarily conserved key energy sensor Snf1 (sucrose non-fermenting 1)-related kinase 1 (SnRK1) complex, plays an important role in the circadian clock...
January 5, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28051986/wavefront-guided-versus-wavefront-optimized-photorefractive-keratectomy-visual-and-military-task-performance
#16
Denise S Ryan, Rose K Sia, Richard D Stutzman, Joseph F Pasternak, Robin S Howard, Christopher L Howell, Tana Maurer, Mark F Torres, Kraig S Bower
PURPOSE: To compare visual performance, marksmanship performance, and threshold target identification following wavefront-guided (WFG) versus wavefront-optimized (WFO) photorefractive keratectomy (PRK). METHODS: In this prospective, randomized clinical trial, active duty U.S. military Soldiers, age 21 or over, electing to undergo PRK were randomized to undergo WFG (n = 27) or WFO (n = 27) PRK for myopia or myopic astigmatism. Binocular visual performance was assessed preoperatively and 1, 3, and 6 months postoperatively: Super Vision Test high contrast, Super Vision Test contrast sensitivity (CS), and 25% contrast acuity with night vision goggle filter...
January 2017: Military Medicine
https://www.readbyqxmd.com/read/28044340/dancing-in-the-dark-darkness-as-a-signal-in-plants
#17
REVIEW
Adam Seluzicki, Yogev Burko, Joanne Chory
Daily cycles of light and dark provide an organizing principle and temporal constraints under which life on Earth evolved. While light is often the focus of plant studies, it is only half the story. Plants continuously adjust to their surroundings, taking both dawn and dusk as cues to organize their growth, development and metabolism to appropriate times of day. In this review, we examine the effects of darkness on plant physiology and growth. We describe the similarities and differences between seedlings grown in the dark versus those grown in light-dark cycles, and the evolution of etiolated growth...
January 3, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28032388/impaired-visual-processing-in-patients-with-insomnia-disorder-revealed-by-a-dissociation-in-visual-search
#18
Enrico Giora, Andrea Galbiati, Sara Marelli, Marco Zucconi, Luigi Ferini-Strambi
Insomnia disorder is associated with both subjective and objective daytime impairments. In particular, cognitive impairments are frequently reported. However, little is known about the effects of this pathology on perceptual processes. In this study we aim at evaluating the effect of insomnia disorder on visual processing by employing a visual search paradigm. Twenty-three patients with insomnia disorder and 20 healthy age- and sex-matched control subjects participated in the study. After a polysomnographic recording night patients performed a visual search task in which they had to respond to the presence/absence of a target (letter T) embedded into a set of distractors (letters Os, Xs or Ls)...
December 29, 2016: Journal of Sleep Research
https://www.readbyqxmd.com/read/28032099/some-new-records-of-culicoides-species-diptera-ceratopogonidae-from-iran
#19
Mohammad Abdigoudarzi
BACKGROUND: Biting midges of the genus Culicoides act as vectors for important diseases affecting humans and both wild and domestic animals. Collection of adult Culicoides specimens in the near vicinity of vertebrate hosts is the major part of any bluetongue surveillance plan. There are old records of Culicoides species dated from 1963, 1968 and 1975. Therefore, it was decided to collect different ceratopogonids members using a light trap. METHODS: One night catching using light traps with a suction fan was performed at representative sites (25 places) located in North Western Provinces (Ardebil, Eastern Azerbaijan, Western Azerbaijan and Zanjan) of Iran (suspected farms for clinical records of Bluetongue virus or serodiagnosis of the Bluetongue virus)...
December 2016: Journal of Arthropod-borne Diseases
https://www.readbyqxmd.com/read/28030993/circadian-rhythms-and-gene-expression-during-mouse-molar-tooth-development
#20
Minou Nirvani, Cuong Khuu, Tor Paaske Utheim, Henriette Stavik Hollingen, Simon Furre Amundsen, Lars Peter Sand, Amer Sehic
OBJECTIVES: Incremental markings in dental enamel suggest that the circadian clock may influence the molecular underpinnings orchestrating enamel formation. The aim of this study was to investigate whether the genes and microRNAs (miRNAs) oscillate in a circadian pattern during tooth and enamel development. MATERIAL AND METHODS: Comparative gene and miRNA expression profiling of the first mandibular molar tooth germ isolated at different time-points during the light and night period was performed using microarrays and validated using real-time RT-PCR...
March 2017: Acta Odontologica Scandinavica
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