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https://www.readbyqxmd.com/read/28629963/environmental-enrichment-reduces-innate-anxiety-with-no-effect-on-depression-like-behaviour-in-mice-lacking-the-serotonin-transporter
#1
Jake Rogers, Shanshan Li, Laurence Lanfumey, Anthony J Hannan, Thibault Renoir
Along with being the main target of many antidepressant medications, the serotonin transporter (5-HTT) is known to be involved in the pathophysiology of depression and anxiety disorders. In line with this, mice with varying 5-HTT genotypes are invaluable tools to study depression- and anxiety-like behaviours as well as the mechanisms mediating potential therapeutics. There is clear evidence that both genetic and environmental factors play a role in the aetiology of psychiatric disorders. In that regard, housing paradigms which seek to enhance cognitive stimulation and physical activity have been shown to exert beneficial effects in animal models of neuropsychiatric disorders...
June 16, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28623767/an-examination-of-the-roles-of-glutamate-and-sex-in-latent-inhibition-relevance-to-the-glutamate-hypothesis-of-schizophrenia
#2
Andrew Chih Wei Huang, Alan Bo-Han He, Chih-Chung Chen
The present study examined the effects of the glutamate receptor antagonist MK-801, the glutamate receptor agonist N-methyl-D-aspartate (NMDA), and sexual dimorphism on latent inhibition to elucidate the glutamate hypothesis of schizophrenia. During the pre-exposure phase, 56 male and 65 female Wistar rats were intracerebroventricularly administered normal saline, MK-801 or NMDA, in the left ventricle and then exposed to a passive avoidance box (or a different context) in three trials over 3 days. Then, all of the rats were placed in the light compartment of the passive avoidance box and were allowed to enter the dark compartment, where they each received a footshock (1mA, 2s) in five trials over 5 days...
June 12, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28622438/gbf1-differentially-regulates-cat2-and-pad4-transcription-to-promote-pathogen-defense-in-arabidopsis-thaliana
#3
Mrunmay Kumar Giri, Nidhi Singh, Zeeshan Zahoor Banday, Vijayata Singh, Hathi Ram, Deepjyoti Singh, Sudip Chattopadhyay, Ashis Kumar Nandi
G-BOX BINDING FACTOR 1 (GBF1) influences light-regulated seedling development in Arabidopsis, and inhibits CATALASE 2 (CAT2) expression during senescence. CAT2 functions as a scavenger of hydrogen peroxide. Role of GBF1 in defense response is not known. We report here that GBF1 positively influences defense against virulent and avirulent strains of Pseudomonas syringae. The gbf1 mutants are susceptible, whereas GBF1 over-expresser transgenic plants are resistant to bacterial pathogens. GBF1 negatively regulates pathogen-induced CAT2 expression and thereby positively regulates hypersensitive response...
June 16, 2017: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/28620982/novice-students-navigating-the-clinical-environment-in-an-early-medical-clerkship
#4
Jenny Barrett, Steve C Trumble, Geoff McColl
CONTEXT: The black box that is student learning in clinical environments is an ongoing research project. Our previous research showed that despite the time that students are given to learn with, about and from patients, some lack confidence for those encounters and see few patients. The study reported here investigated individual and environmental factors affecting medical students' self-directed learning time in hospital. METHODS: We studied second year students in the four-year postgraduate Melbourne Medical School programme as they undertook the first of their four 9-week hospital placements in medical wards...
June 16, 2017: Medical Education
https://www.readbyqxmd.com/read/28619072/the-arabidopsis-swi-snf-protein-baf60-mediates-seedling-growth-control-by-modulating-dna-accessibility
#5
Teddy Jégu, Alaguraj Veluchamy, Juan S Ramirez-Prado, Charley Rizzi-Paillet, Magalie Perez, Anaïs Lhomme, David Latrasse, Emeline Coleno, Serge Vicaire, Stéphanie Legras, Bernard Jost, Martin Rougée, Fredy Barneche, Catherine Bergounioux, Martin Crespi, Magdy M Mahfouz, Heribert Hirt, Cécile Raynaud, Moussa Benhamed
BACKGROUND: Plant adaptive responses to changing environments involve complex molecular interplays between intrinsic and external signals. Whilst much is known on the signaling components mediating diurnal, light, and temperature controls on plant development, their influence on chromatin-based transcriptional controls remains poorly explored. RESULTS: In this study we show that a SWI/SNF chromatin remodeler subunit, BAF60, represses seedling growth by modulating DNA accessibility of hypocotyl cell size regulatory genes...
June 15, 2017: Genome Biology
https://www.readbyqxmd.com/read/28617599/effects-of-adulteration-technique-on-the-nir-detection-of-melamine-in-milk-powder
#6
Peter F Scholl, Marti M Bergana, Betsy Jean Yakes, Zhuohong Xie, Steven Zbylut, Gerard Downey, Magdi M Mossoba, Joseph Edward Jablonski, Robert Magaletta, Stephen E Holroyd, Martin Buehler, Jianwei Qin, William Jeffrey Hurst, Joseph H LaPointe, Dean E Roberts, Carol Zrybko, Andrew Mackey, Jason D Holton, Greg A Israelson, Anitra Payne, Moon S Kim, Kuanglin Chao, Jeffrey C Moore
The U.S. Pharmacopeia has led an international collaborative project to develop a tool-box of screening methods and reference standards for the detection of milk powder adulteration. During the development of adulterated milk powder reference standards, blending methods used to combine melamine and milk had unanticipated strong effects on the NIR spectrum of melamine. The prominent absorbance band at 1468 nm of melamine was retained when it was dry-blended with skim milk powder but disappeared in wet-blended mixtures, where spray dried milk powder samples were prepared from solution...
June 15, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28616659/isolation-and-functional-characterization-of-a-circadian-regulated-constans-homolog-gbco-from-ginkgo-biloba
#7
Jiaping Yan, Dun Mao, Xiaomeng Liu, Lanlan Wang, Feng Xu, Guiyuan Wang, Weiwei Zhang, Yongling Liao
This is the first report to clone and functionally characterize a flowering time gene GbCO in perennial gymnosperm Ginkgo biloba. GbCO complements the co mutant of Arabidopsis, restoring normal early flowering. CONSTANS (CO) is a central regulator of photoperiod pathway, which channels inputs from light, day length, and circadian clock to promote the floral transition. In order to understand the role of CO in gymnosperm Ginkgo biloba, which has a long juvenile phase (15-20 years), a CO homolog (GbCO) was isolated and characterized from G...
June 14, 2017: Plant Cell Reports
https://www.readbyqxmd.com/read/28616398/new-photodynamic-therapy-with-next-generation-photosensitizers
#8
REVIEW
Hiromi Kataoka, Hirotada Nishie, Noriyuki Hayashi, Mamoru Tanaka, Akihiro Nomoto, Shigenobu Yano, Takashi Joh
Photodynamic therapy (PDT) is a non-invasive antitumor treatment that uses the combination of a photosensitizer, tissue oxygen, and visible light irradiation to produce cytotoxic reactive oxygen species, predominantly singlet oxygen. Currently, first-generation PDT using porfimer sodium with an excimer dye laser, and second-generation PDT using talaporfin sodium PDT with a semiconductor laser are approved by health insurance for use in Japan. However, the cancer cell specificity and selectivity of these treatments are inadequate...
April 2017: Annals of Translational Medicine
https://www.readbyqxmd.com/read/28616037/correlation-between-photoreceptor-injury-regeneration-and-behavior-in-a-zebrafish-model
#9
Ya-Jie Wang, Shi-Jiao Cai, Jian-Lin Cui, Yang Chen, Xin Tang, Yu-Hao Li
Direct exposure to intensive visible light can lead to solar retinopathy, including macular injury. The signs and symptoms include central scotoma, metamorphopsia, and decreased vision. However, there have been few studies examining retinal injury due to intensive light stimulation at the cellular level. Neural network arrangements and gene expression patterns in zebrafish photoreceptors are similar to those observed in humans, and photoreceptor injury in zebrafish can induce stem cell-based cellular regeneration...
May 2017: Neural Regeneration Research
https://www.readbyqxmd.com/read/28614300/pten-counteracts-fbxl2-to-promote-ip3r3-and-ca-2-mediated-apoptosis-limiting-tumour-growth
#10
Shafi Kuchay, Carlotta Giorgi, Daniele Simoneschi, Julia Pagan, Sonia Missiroli, Anita Saraf, Laurence Florens, Michael P Washburn, Ana Collazo-Lorduy, Mireia Castillo-Martin, Carlos Cordon-Cardo, Said M Sebti, Paolo Pinton, Michele Pagano
In response to environmental cues that promote IP3 (inositol 1,4,5-trisphosphate) generation, IP3 receptors (IP3Rs) located on the endoplasmic reticulum allow the 'quasisynaptical' feeding of calcium to the mitochondria to promote oxidative phosphorylation. However, persistent Ca(2+) release results in mitochondrial Ca(2+) overload and consequent apoptosis. Among the three mammalian IP3Rs, IP3R3 appears to be the major player in Ca(2+)-dependent apoptosis. Here we show that the F-box protein FBXL2 (the receptor subunit of one of 69 human SCF (SKP1, CUL1, F-box protein) ubiquitin ligase complexes) binds IP3R3 and targets it for ubiquitin-, p97- and proteasome-mediated degradation to limit Ca(2+) influx into mitochondria...
June 14, 2017: Nature
https://www.readbyqxmd.com/read/28611922/the-bzip-transcription-factor-mdhy5-regulates-anthocyanin-accumulation-and-nitrate-assimilation-in-apple
#11
Jian-Ping An, Feng-Jia Qu, Ji-Fang Yao, Xiao-Na Wang, Chun-Xiang You, Xiao-Fei Wang, Yu-Jin Hao
The basic leucine zipper (bZIP) transcription factor HY5 plays a multifaceted role in plant growth and development. Here the apple MdHY5 gene was cloned based on its homology with Arabidopsis HY5. Expression analysis demonstrated that MdHY5 transcription was induced by light and abscisic acid treatments. Electrophoretic mobility shift assays and transient expression assays subsequently showed that MdHY5 positively regulated both its own transcription and that of MdMYB10 by binding to E-box and G-box motifs, respectively...
2017: Horticulture Research
https://www.readbyqxmd.com/read/28608936/a-photo-responsive-f-box-protein-fof2-regulates-floral-initiation-by-promoting-flc-expression-in-arabidopsis
#12
Reqing He, Xinmei Li, Ming Zhong, Jindong Yan, Ronghuan Ji, Xu Li, Qin Wang, Dan Wu, Mengsi Sun, Dongying Tang, Jianzhong Lin, Hongyu Li, Bin Liu, Hongtao Liu, Xuanming Liu, Xiaoying Zhao, Chentao Lin
Floral initiation is regulated by various genetic pathways in response to light, temperature, hormones, and developmental status. However, the molecular mechanisms underlying the interactions between different genetic pathways are not fully understood. Here, we show that the photoresponsive gene FOF2 (F-box of flowering 2) negatively regulates flowering. FOF2 encodes a putative F-box protein that interacts specifically with ASK14, and its overexpression results in later flowering under both long-day and short-day photoperiods...
June 13, 2017: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/28602957/mitochondrial-dynamics-signaling-is-shifted-toward-fusion-in-muscles-of-very-old-hip-fractured-patients-results-from-the-sarcopenia-in-hip-fracture-shift-exploratory-study
#13
Anna Picca, Riccardo Calvani, Maria Lorenzi, Amerigo Menghi, Marco Galli, Raffaele Vitiello, Francesco Randisi, Roberto Bernabei, Francesco Landi, Emanuele Marzetti
BACKGROUND: Mitochondrial quality control (MQC) is crucial for maintaining mitochondrial fitness. We investigated MQC signaling in muscle of old hip-fractured patients. METHODS: Twenty-three patients, enrolled in the Sarcopenia in HIp FracTure (SHIFT) study, were categorized into old (OL; n=8) and very old groups (VOL; n=15) using 85years as the cut-off. The expression of a set of MQC signaling proteins was assayed in vastus lateralis muscle biopsies. RESULTS: The content of lysosome-associated membrane protein 2, microtubule-associated protein 1 light chain 3B, optic atrophy protein 1, fission protein 1 (Fis1), peroxisome proliferator-activated receptor-γ coactivator-1α, and forkhead box O3 was unvaried between groups...
June 7, 2017: Experimental Gerontology
https://www.readbyqxmd.com/read/28602930/illumination-in-spinal-surgery-depending-on-different-approaches-and-light-sources
#14
Eike Wilbers, Christian Ewelt, Stephanie Schipmann, Walter Stummer, Mark Klingenhöfer
Sufficient visualisation of the operating field is crucial for success in surgery and is important especially concerning minimal invasive and deep approaches in spine surgery METHODS: The spinal microsurgical approach was imitated using an isolated box that was accessed with different devices. Different light sources and auxiliary devices were analysed aiming to compare them to each other. As light source we used one microscope, one standard operating theatre lamp and one headlamp. The auxiliary devices included different tubes with and without optic light fibre, different retractors and one endoscope RESULTS/CONCLUSION: Hence, we demonstrated that different combinations of light sources and auxiliary devices provide significantly different illumination in the artificial operating field...
June 8, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28597450/effect-of-visible-light-on-vasospasticity-of-post-subarachnoid-hemorrhage-cerebrospinal-fluid
#15
Pulat Akin Sabanci, Bulent Omay, Yavuz Aras, Aydın Aydoseli, Achmet Ali, Tulin Erdem, Altay Sencer, Talat Kiris
Background and Objective Cerebral vasospasm (CV) is a serious complication of subarachnoid hemorrhage (SAH) with high morbidity and mortality rates. The mechanism of CV has not been determined. There are many theories related to this unsolved issue, one of which supports CV as a two-stage phenomenon from a pathophysiologic perspective. The first stage consists of inhibition of neuronal nitric oxide synthase by oxyhemoglobin, which results in a decrease of nitric oxide (NO) production. The second stage consists of an increase in the levels of asymmetric dimethylarginine through bilirubin oxidation products (BOXes), which are oxidized by-products of hemoglobin metabolism...
June 8, 2017: Journal of Neurological Surgery. Part A, Central European Neurosurgery
https://www.readbyqxmd.com/read/28576648/sex-differences-and-sex-hormones-in-anxiety-like-behavior-of-aging-rats
#16
Emese Domonkos, Veronika Borbélyová, Melinda Csongová, Martin Bosý, Mária Kačmárová, Daniela Ostatníková, Július Hodosy, Peter Celec
Sex differences in the prevalence of affective disorders might be attributable to different sex hormone milieu. The effects of short-term sex hormone deficiency on behavior, especially on anxiety have been studied in numerous animal experiments, mainly on young adult rats and mice. However, sex differences in aged animals and the effects of long-term hypogonadism are understudied. The aim of our study was to analyze sex differences in anxiety-like behavior in aged rats and to prove whether they can be attributed to endogenous sex hormone production in males...
June 8, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28559892/streptomyces-colonosanans-sp-nov-a-novel-actinobacterium-isolated-from-malaysia-mangrove-soil-exhibiting-antioxidative-activity-and-cytotoxic-potential-against-human-colon-cancer-cell-lines
#17
Jodi Woan-Fei Law, Hooi-Leng Ser, Acharaporn Duangjai, Surasak Saokaew, Sarah I Bukhari, Tahir M Khan, Nurul-Syakima Ab Mutalib, Kok-Gan Chan, Bey-Hing Goh, Learn-Han Lee
Streptomyces colonosanans MUSC 93J(T), a novel strain isolated from mangrove forest soil located at Sarawak, Malaysia. The bacterium was noted to be Gram-positive and to form light yellow aerial and vivid yellow substrate mycelium on ISP 2 agar. The polyphasic approach was used to determine the taxonomy of strain MUSC 93J(T) and the strain showed a range of phylogenetic and chemotaxonomic properties consistent with those of the members of the genus Streptomyces. Phylogenetic and 16S rRNA gene sequence analysis indicated that closely related strains include Streptomyces malachitofuscus NBRC 13059(T) (99...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28557390/-the-battery-of-tests-for-behavioral-phenotyping-of-aging-animals-in-the-experiment
#18
Ya V Gorina, Yu K Komleva, O L Lopatina, V V Volkova, A I Chernykh, A A Shabalova, A A Semenchukov, R Ya Olovyannikova, A B Salmina
The purpose of the study was to develop a battery of tests to study social and cognitive impairments for behavioral phenotyping of aging experimental animals with physiological neurodegeneration. Object of the study were outbred CD1 mice in the following groups: 1st group - 12-month old male mice (physiological aging); 2nd group - 2-month old male mice (control group). Social recognition test, elevated plus maze test (EPM), open field test, light-dark box test, and Fear conditioning protocol were used to estimate the neurological status of experimental animals...
2017: Advances in Gerontology, Uspekhi Gerontologii
https://www.readbyqxmd.com/read/28552939/genome-wide-survey-of-b-box-proteins-in-potato-solanum-tuberosum-identification-characterization-and-expression-patterns-during-diurnal-cycle-etiolation-and-de-etiolation
#19
Urszula Talar, Agnieszka Kiełbowicz-Matuk, Jagoda Czarnecka, Tadeusz Rorat
Plant B-box domain proteins (BBX) mediate many light-influenced developmental processes including seedling photomorphogenesis, seed germination, shade avoidance and photoperiodic regulation of flowering. Despite the wide range of potential functions, the current knowledge regarding BBX proteins in major crop plants is scarce. In this study, we identify and characterize the StBBX gene family in potato, which is composed of 30 members, with regard to structural properties and expression profiles under diurnal cycle, etiolation and de-etiolations...
2017: PloS One
https://www.readbyqxmd.com/read/28546911/graphene-based-polymer-bilayers-with-superior-light-driven-properties-for-remote-construction-of-3d-structures
#20
Zhenhua Tang, Ziwei Gao, Shuhai Jia, Fei Wang, Yonglin Wang
3D structure assembly in advanced functional materials is important for many areas of technology. Here, a new strategy exploits IR light-driven bilayer polymeric composites for autonomic origami assembly of 3D structures. The bilayer sheet comprises a passive layer of poly(dimethylsiloxane) (PDMS) and an active layer comprising reduced graphene oxides (RGOs), thermally expanding microspheres (TEMs), and PDMS. The corresponding fabrication method is versatile and simple. Owing to the large volume expansion of the TEMs, the two layers exhibit large differences in their coefficients of thermal expansion...
May 2017: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
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