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https://www.readbyqxmd.com/read/29777288/time-shifting-effects-of-methylphenidate-on-daily-rhythms-in-the-diurnal-rodent-arvicanthis-ansorgei
#1
Jorge Mendoza, Hester C van Diepen, Rob Rodrigues Pereira, Johanna H Meijer
People suffering of attention-deficit/hyperactivity disorder (ADHD) and treated with the psychostimulant methylphenidate (MPH) show sleep-wake cycle and daily rhythm alterations despite the beneficial effects of MPH on behavioral symptoms (i.e., hyperactivity, attention). In nocturnal rodents (i.e., mice), chronic exposure to MPH alters the neural activity of the circadian clock in the suprachiasmatic nucleus (SCN), behavioral rhythms, and the sleep-wake cycle. Here, we studied the effects of MPH on daily rhythms of behavior and body temperature of the diurnal rodent Arvicanthis ansorgei...
May 18, 2018: Psychopharmacology
https://www.readbyqxmd.com/read/29776998/visual-field-shape-and-foraging-ecology-in-diurnal-raptors
#2
Simon Potier, Olivier Duriez, Gregory B Cunningham, Vincent Bonhomme, Colleen O'Rourke, Esteban Fernández-Juricic, Francesco Bonadonna
Birds, particularly raptors, are believed to forage primarily using visual cues. However, raptor foraging tactics are highly diverse - from chasing mobile prey to scavenging - which may reflect adaptations of their visual systems. To investigate this, we studied the visual field configuration of 15 species of diurnal Accipitriformes that differ in such tactics, first focusing on the binocular field and blind area by using a single traits approach, and then exploring the shape of the binocular field with morphometric approaches...
May 18, 2018: Journal of Experimental Biology
https://www.readbyqxmd.com/read/29776641/cortisol-awakening-response-is-decreased-in-patients-with-first-episode-psychosis-and-increased-in-healthy-controls-with-a-history-of-severe-childhood-abuse
#3
Simone Ciufolini, Charlotte Gayer-Anderson, Helen L Fisher, Tiago Reis Marques, Heather Taylor, Marta Di Forti, Patricia Zunszain, Craig Morgan, Robin M Murray, Carmine M Pariante, Paola Dazzan, Valeria Mondelli
BACKGROUND: Childhood abuse is highly prevalent in psychosis patients, but whether/how it affects hypothalamic-pituitary-adrenal (HPA) axis at the onset of psychosis remains unclear. We aimed to investigate the effects of severity of childhood abuse on HPA axis activity, in first-episode psychosis (FEP) and healthy controls. METHODS: We recruited 169 FEP patients and 133 controls with different degrees of childhood physical and sexual abuse (i.e. no abuse exposure, non-severe abuse exposure, and severe abuse exposure)...
May 15, 2018: Schizophrenia Research
https://www.readbyqxmd.com/read/29775885/clinical-correlates-of-hypothalamic-pituitary-adrenal-axis-measures-in-individuals-at-risk-for-psychosis-and-with-first-episode-psychosis
#4
Javier Labad, Antonio Armario, Roser Nadal, Montse Solé, Alfonso Gutiérrez-Zotes, Itziar Montalvo, Lorena Moreno-Samaniego, Lourdes Martorell, Vanessa Sánchez-Gistau, Elisabet Vilella
Hypothalamic-pituitary-adrenal (HPA) axis alterations in at-risk mental states (ARMS) resemble those observed in established psychosis but are less consistent. We aimed to explore HPA axis abnormalities in both first-episode psychosis (FEP) and ARMS patients, while controlling for psychopathological symptoms. We studied 21 ARMS, 34 FEP patients and 34 healthy subjects. Clinical assessment included psychopathological symptoms (positive, negative, disorganized, excited and depressive symptoms) and stress measures...
May 7, 2018: Psychiatry Research
https://www.readbyqxmd.com/read/29775563/anolis-carolinensis-as-a-model-to-understand-molecular-and-cellular-basis-of-foveal-development
#5
Naif S Sannan, Xianghong Shan, Kevin Gregory-Evans, Kenro Kusumi, Cheryl Y Gregory-Evans
The fovea is an anatomical specialization of the central retina containing closely packed cone-photoreceptors providing an area of high acuity vision in humans and primates. Despite its key role in the clarity of vision, little is known about the molecular and cellular basis of foveal development, due to the absence of a foveal structure in commonly used laboratory animal models. Of the amniotes the retina in birds of prey and some reptiles do exhibit a typical foveal structure, but they have not been studied in the context of foveal development due to lack of availability of embryonic tissue, lack of captive breeding programs, and limited genomic information...
May 15, 2018: Experimental Eye Research
https://www.readbyqxmd.com/read/29774037/plant-sediment-interactions-in-salt-marshes-an-optode-imaging-study-of-o-2-ph-and-co-2-gradients-in-the-rhizosphere
#6
Ketil Koop-Jakobsen, Peter Mueller, Robert J Meier, Gregor Liebsch, Kai Jensen
In many wetland plants, belowground transport of O2 via aerenchyma tissue and subsequent O2 loss across root surfaces generates small oxic root zones at depth in the rhizosphere with important consequences for carbon and nutrient cycling. This study demonstrates how roots of the intertidal salt-marsh plant Spartina anglica affect not only O2 , but also pH and CO2 dynamics, resulting in distinct gradients of O2 , pH, and CO2 in the rhizosphere. A novel planar optode system (VisiSens TD® , PreSens GmbH) was used for taking high-resolution 2D-images of the O2 , pH, and CO2 distribution around roots during alternating light-dark cycles...
2018: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29771699/the-optimal-time-of-day-for-statin-administration-a-review-of-current-evidence
#7
Kamal Awad, Maciej Banach
PURPOSE OF REVIEW: In humans, cholesterol biosynthesis varies diurnally, reaching its peak at night. Therefore, choosing the time of statin administration is critical because of their different half-lives. Dose timing becomes more important in patients with polypharmacy because it might affect their adherence to the statin therapy. RECENT FINDINGS: Herein, we narratively summarized the available clinical studies (n = 17) and meta-analyses (n = 2) that compared the morning with the evening dose of statins in terms of safety and efficacy, with special focus on their low-density lipoprotein-lowering effects...
May 15, 2018: Current Opinion in Lipidology
https://www.readbyqxmd.com/read/29771368/restless-sleep-disorder-in-children-a-pilot-study-on-a-tentative-new-diagnostic-category
#8
Lourdes M DelRosso, Oliviero Bruni, Raffaele Ferri
Study Objectives: A group of children with "restless sleep" who do not fit the criteria for any other sleep disorder but with daytime impairment are studied to identify restless sleep disorder (RSD) clinically and polysomnographically and to differentiate it from other sleep disorders of childhood. Methods: A pilot study of 15 school aged children with restless sleep and 15 sex and age matched children with restless leg syndrome (RLS) and 37 normal controls were included...
May 16, 2018: Sleep
https://www.readbyqxmd.com/read/29767842/more-than-just-co-2-recycling-corticular-photosynthesis-as-a-mechanism-to-reduce-the-risk-of-an-energy-crisis-induced-by-low-oxygen
#9
Christiane Wittmann, Hardy Pfanz
Reassimilation of internal CO2 via corticular photosynthesis (PScort ) has an important effect on the carbon economy of trees. However, little is known about its role as a source of O2 supply to the stem parenchyma and its implications in consumption and movement of O2 within trees. PScort of young Populus nigra (black poplar) trees was investigated by combining optical micro-optode measurements with monitoring of stem chlorophyll fluorescence. During times of zero sap flow in spring, stem oxygen concentrations (cO2 ) exhibited large temporal changes...
May 16, 2018: New Phytologist
https://www.readbyqxmd.com/read/29767729/a-comparative-study-on-the-excretion-of-urinary-metabolites-in-goats-and-sheep-to-evaluate-spot-sampling-applied-to-protein-nutrition-trials
#10
A C S Dos Santos, S A Santos, G G P Carvalho, L D S Mariz, M S L Tosto, S C Valadares Filho, J A G Azevedo
The main objective of this study was to establish a protocol to validate urine spot samples to estimate N excretion and microbial synthesis in goat and sheep; and to study factors that affect daily creatinine and purine derivatives urinary excretion. Also a performance trial was carried out to compare goat and sheep slaughtered after different feedlot periods. Twelve Boer goats (20.6 kg±3.4 initial BW) and twelve Dorper sheep (18.4 kg±2.3 initial BW), all 4-month-old, males, were used. Eight animals (four goats and four sheep) were randomly allocated to be slaughtered at 28, 56 and 84 days in feedlot...
May 15, 2018: Journal of Animal Science
https://www.readbyqxmd.com/read/29767420/ocular-coherence-tomography-measured-changes-over-time-in-anterior-chamber-angle-and-diurnal-intraocular-pressure-after-laser-iridotomy-impact-study
#11
Ivailo Zhekov, Shahina Pardhan, Rupert Ra Bourne
IMPORTANCE: The change in the anatomical dimensions over time and the effect on diurnal intraocular pressure (DIOP) following laser peripheral iridotomy is poorly understood. BACKGROUND: To evaluate change over time in anterior chamber angle anatomy following laser peripheral iridotomy (LPI) in patients with primary angle closure compared to control eyes. Additionally, the effect of LPI on DIOP fluctuation was investigated. DESIGN: Longitudinal, prospective, double-randomized research study...
May 16, 2018: Clinical & Experimental Ophthalmology
https://www.readbyqxmd.com/read/29766682/distinct-ultradian-rhythms-in-plasma-clusterin-concentrations-in-lean-and-obese-korean-subjects
#12
Jong Han Choi, Eunheui Jeong, Byung Soo Youn, Min Seon Kim
BACKGROUND: Blood levels of many hormones show rhythmic fluctuations with variable duration of cycles. Clusterin/apolipoprotein J is a glycoprotein which is highly expressed in the plasma and has modulatory roles in immune and inflammatory reactions, neurobiology, lipid metabolism, and leptin signaling. In this study, we examined the diurnal fluctuations of plasma clusterin concentrations in lean and obese young men. METHODS: For the study, 14 subjects (five lean and five obese men; two lean and two obese women) were admitted to the research ward and blood samples were drawn every 30 minutes during light-on period (6:00 AM to 10:00 PM) and every hour during light-off period...
May 4, 2018: Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29765003/passive-versus-active-circuit-during-invasive-mechanical-ventilation-in-subjects-with-amyotrophic-lateral-sclerosis
#13
Elisa De Mattia, Elisa Falcier, Andrea Lizio, Christian Lunetta, Valeria A Sansone, Nicola Barbarito, Barbara Garabelli, Marino Iatomasi, Elisabetta Roma, Fabrizio Rao, Annalisa Carlucci
BACKGROUND: Until recently, it has been considered essential to maintain the use of a double-limb circuit in patients with amyotrophic lateral sclerosis (ALS) to avoid rebreathing expired air during invasive mechanical ventilation. Currently, life-sustaining home ventilators can work with a single, lighter circuit that is easier to manage. Our aim was to evaluate the effectiveness and safety of a single-limb circuit with intentional leaks (passive circuit) in comparison with a circuit with an expiratory valve (active circuit), in subjects with ALS who use invasive home ventilation...
May 15, 2018: Respiratory Care
https://www.readbyqxmd.com/read/29764986/phytochrome-b-requires-pif-degradation-and-sequestration-to-induce-light-responses-across-a-wide-range-of-light-conditions
#14
Eunae Park, Yeojae Kim, Giltsu Choi
Phytochrome B (phyB) inhibits the function of phytochrome-interacting factors (PIFs) by inducing their degradation and sequestration, but the relative physiological importance of these two phyB activities is unclear. In an analysis of published Arabidopsis thaliana phyB mutations, we identified a point mutation in the N-terminal half of phyB (phyBG111D) that abolishes its PIF sequestration activity without affecting its PIF degradation activity. We also identified a point mutation in the phyB C-terminal domain, which, when combined with a deletion of the C-terminal end (phyB990G767R), does the opposite; it blocks PIF degradation without affecting PIF sequestration...
May 15, 2018: Plant Cell
https://www.readbyqxmd.com/read/29764214/chronotype-influences-response-to-antidepressant-chronotherapeutics-in-bipolar-patients
#15
Sara Dallaspezia, Masahiro Suzuki, Locatelli Clara, Cristina Colombo, Francesco Benedetti
Patient diurnal mood fluctuation, sleep characteristics and factors affecting sleep homeostasis predict antidepressant response to the combination of total sleep deprivation and light therapy (TSD + LT). In order to study if chronotype could influence response to TSD+LT, we considered 194 bipolar depressed patients. Severity of depression was rated with Hamilton Depression Rating Scale; perceived mood levels were assessed by a self-administered 10-cm visual analogue scale and chronotype was assessed using the Mornigness-Eveningness Questionnaire...
May 15, 2018: Chronobiology International
https://www.readbyqxmd.com/read/29760192/circadian-rhythms-influence-the-severity-of-sepsis-in-mice-via-a-tlr2-dependent-leukocyte-intrinsic-mechanism
#16
Erica L Heipertz, Jourdan Harper, Charlie A Lopez, Erol Fikrig, Michael E Hughes, Wendy E Walker
Circadian rhythms coordinate an organism's activities and biological processes to the optimal time in the 24-h daylight cycle. We previously demonstrated that male C57BL/6 mice develop sepsis more rapidly when the disease is induced in the nighttime versus the daytime. In this report, we elucidate the mechanism of this diurnal difference. Sepsis was induced via cecal ligation and puncture (CLP) at zeitgeber time (ZT)-19 (2 am) or ZT-7 (2 pm). Like the males used in our prior study, female C57BL/6 mice had a worse outcome when CLP was induced at ZT-19 versus ZT-7, and these effects persisted when we pooled the data from both sexes...
May 14, 2018: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29760179/time-restricted-feeding-prevents-ablation-of-diurnal-rhythms-in-gastric-vagal-afferent-mechanosensitivity-observed-in-high-fat-diet-induced-obese-mice
#17
Stephen J Kentish, George Hatzinikolas, Hui Li, Claudine A Frisby, Gary A Wittert, Amanda J Page
Mechanosensitive gastric vagal afferents (GVAs) are involved in the regulation of food intake. GVAs exhibit diurnal rhythmicity in their response to food related stimuli allowing time of day specific satiety signalling. This diurnal rhythmicity is ablated in high fat diet (HFD)-induced obesity. Time restricted feeding (TRF) has a strong influence on peripheral clocks. This study aimed to determine whether diurnal patterns in GVA mechanosensitivity are entrained by TRF.Eight-week old male C57BL/6 mice (N=256) were fed a standard laboratory diet (SLD) or HFD for 12wks...
May 14, 2018: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29754078/heavy-duty-diesel-vehicles-dominate-vehicle-emissions-in-a-tunnel-study-in-northern-china
#18
Congbo Song, Chao Ma, Yanjie Zhang, Ting Wang, Lin Wu, Peng Wang, Yan Liu, Qian Li, Jinsheng Zhang, Qili Dai, Chao Zou, Luna Sun, Hongjun Mao
The relative importance of contributions of gasoline vehicles (GVs) and diesel vehicles (DVs), heavy-duty diesel vehicles (HDDVs) and non-HDDVs to on-road vehicle emissions remains unclear. Vehicle emission factors (EFs), including fine particulate matter (PM2.5 ), NO-NO2 -NOx , and carbon monoxide (CO), were measured (August 4-18, 2017) in an urban tunnel in Tianjin, northern China. The average EFs (mg km-1 veh-1 ) of the fleet were as follows: 9.21 (95% confidence interval: 1.60, 23.07) for PM2.5 , 62.08 (21...
May 9, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29753974/occurrence-characterisation-and-fate-of-nano-particulate-ti-and-ag-in-two-norwegian-wastewater-treatment-plants
#19
Fabio Polesel, Julia Farkas, Marianne Kjos, Patricia Almeida Carvalho, Xavier Flores-Alsina, Krist V Gernaey, Steffen Foss Hansen, Benedek Gy Plósz, Andy M Booth
Due to their widespread application in consumer products, elemental titanium (e.g., titanium dioxide, TiO2 ) and silver (Ag), also in nanoparticulate form, are increasingly released from households and industrial facilities to urban wastewater treatment plants (WWTPs). A seven-day sampling campaign was conducted in two full-scale WWTPs in Trondheim (Norway) employing only primary treatment. We assessed the occurrence and elimination of Ti and Ag, and conducted size-based fractionation using sequential filtration of influent samples to separate particulate, colloidal and dissolved fractions...
April 30, 2018: Water Research
https://www.readbyqxmd.com/read/29753728/retinal-adaptation-to-dim-light-vision-in-spectacled-caimans-caiman-crocodilus-fuscus-analysis-of-retinal-ultrastructure
#20
Anett Karl, Silke Agte, Astrid Zayas-Santiago, Felix N Makarov, Yomarie Rivera, Jan Benedikt, Mike Francke, Andreas Reichenbach, Serguei N Skatchkov, Andreas Bringmann
It has been shown that mammalian retinal glial (Müller) cells act as living optical fibers that guide the light through the retinal tissue to the photoreceptor cells (Agte et al., 2011; Franze et al., 2007). However, for nonmammalian species it is unclear whether Müller cells also improve the transretinal light transmission. Furthermore, for nonmammalian species there is a lack of ultrastructural data of the retinal cells, which, in general, delivers fundamental information of the retinal function, i.e. the vision of the species...
May 10, 2018: Experimental Eye Research
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