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https://www.readbyqxmd.com/read/29356457/seasonal-variation-and-correlation-between-corticosterone-and-the-antioxidant-uric-acid-during-stress-in-the-northern-cardinal-cardinalis-cardinalis
#1
Jonathan W Haskins, Frank A Spizzoucco, Brian G Walker
Glucocorticoids modify metabolism and other physiological processes in order to mount an appropriate response to stress. This stress response is affected by a combination of seasonal changes, life-history events, and environmental factors. Determining seasonal variability and the potential connection between stress hormones and metabolism is fundamental in understanding seasonal physiological changes in animals. Here, we compared an indicator of stress (corticosterone) with an indicator of metabolic activity (uric acid-a non-enzymatic antioxidant and end product of protein metabolism) during capture and restraint in Northern Cardinals (Cardinalis cardinalis) during fall, winter, spring, and summer...
July 2017: Journal of Experimental Zoology. Part A, Ecological and Integrative Physiology
https://www.readbyqxmd.com/read/29356449/ectoparasites-as-developmental-stressors-effects-on-somatic-and-physiological-development
#2
Leah J E Pryor, Joseph M Casto
Developmental stress can alter resource allocation in early life, and in altricial birds with rapid developmental trajectories and high resource demands, nestlings may adjust early resource partitioning to cope with challenging environments. We experimentally manipulated ectoparasite levels in nests and assessed whether ectoparasites affected somatic and physiological development in European starling (Sturnus vulgaris) nestlings. We hypothesized that mites act as developmental stressors in nestlings and predicted that nestlings from infested nests would exhibit either reduced somatic growth, or reduced physiological development, including impaired innate immunity, and would have elevated corticosterone concentrations...
June 2017: Journal of Experimental Zoology. Part A, Ecological and Integrative Physiology
https://www.readbyqxmd.com/read/29356429/the-effects-of-incubation-temperature-and-experimental-design-on-heart-rates-of-lizard-embryos
#3
Austin C Hulbert, Timothy S Mitchell, Joshua M Hall, Cassia M Guiffre, Danielle C Douglas, Daniel A Warner
Many studies of phenotypic plasticity alter environmental conditions during embryonic development, yet only measure phenotypes at the neonatal stage (after embryonic development). However, measuring aspects of embryo physiology enhances our understanding of how environmental factors immediately affect embryos, which aids our understanding of developmental plasticity. While current research on reptile developmental plasticity has demonstrated that fluctuating incubation temperatures affect development differently than constant temperatures, most research on embryo physiology is still performed with constant temperature experiments...
August 2017: Journal of Experimental Zoology. Part A, Ecological and Integrative Physiology
https://www.readbyqxmd.com/read/29356364/the-effect-of-hormone-manipulations-on-sex-ratios-varies-with-environmental-conditions-in-a-turtle-with-temperature-dependent-sex-determination
#4
Daniel A Warner, Timothy S Mitchell, Brooke L Bodensteiner, Fredric J Janzen
Exogenous application of steroids and related substances to eggs affects offspring sex ratios in species with temperature-dependent sex determination (TSD). Laboratory studies demonstrate that this effect is most pronounced near the constant temperature that produces 1:1 sex ratios (i.e., pivotal temperature). However, the impact of such chemicals on sex determination under natural nest temperatures (which fluctuate daily) is unknown, but could provide insight into the relative contributions of these two factors under natural conditions...
April 2017: Journal of Experimental Zoology. Part A, Ecological and Integrative Physiology
https://www.readbyqxmd.com/read/29355728/stressful-life-events-and-depressive-symptoms-in-mothers-and-fathers-of-young-children
#5
Eirini Flouri, Martina K Narayanan, Ane Nærde
BACKGROUND: Parents of young children generally report more depressive symptoms than parents of adult children or people without children, mainly because the presence of young children increases exposure to significant stressors (such as stressful life events). However, most studies on the depressogenic role of stressful life events in parents of young children have focussed on mothers. METHODS: Using data from 1138 families with young children in Norway, we investigated gender differences in the effect of stressful life events after a child's birth on the development of parental depressive symptoms in 3 follow-ups at child's ages 3-6 years...
January 3, 2018: Journal of Affective Disorders
https://www.readbyqxmd.com/read/29355578/risk-factors-for-hospital-norovirus-outbreaks-impact-of-vomiting-genotype-and-multioccupancy-rooms
#6
Carl-Johan Fraenkel, Malin Inghammar, Anna Söderlund-Strand, P J Hugo Johansson, Blenda Böttiger
BACKGROUND: Norovirus is frequently introduced to the hospital and is a common cause of hospital outbreaks. Recognition of the factors that facilitate or impede norovirus transmission is an important step to effectively prevent hospital outbreaks. AIM: To investigate risk factors for norovirus (NoV) outbreaks in hospital settings. METHODS: Clinical data, ward setting and norovirus genotype were collected from all 65 NoV positive index cases in outbreaks and all 186 sporadic NoV cases at 192 wards in southern Sweden during 2010-2012 in a nested case-control study...
January 17, 2018: Journal of Hospital Infection
https://www.readbyqxmd.com/read/29355565/effects-of-background-and-contour-luminance-on-the-hue-and-brightness-of-the-watercolor-effect
#7
Peggy Gerardin, Michel Dojat, Kenneth Knoblauch, Frédéric Devinck
Conjoint measurement was used to investigate the joint influences of the luminance of the background and the inner contour on hue- and brightness filling-in for a stimulus configuration generating a water-color effect (WCE), i.e., a wiggly bi-chromatic contour enclosing a region with the lower luminance component on the exterior. Two stimuli with the background and inner contour luminances covarying independently were successively presented, and in separate experiments, the observer judged which member of the pair's interior regions contained a stronger hue or was brighter...
January 17, 2018: Vision Research
https://www.readbyqxmd.com/read/29355445/intramolecular-crosstalk-between-catalytic-activities-of-receptor-kinases
#8
Lusisizwe Kwezi, Janet I Wheeler, Claudius Marondedze, Chris Gehring, Helen R Irving
Signal modulation is important for the growth and development of plants and this process is mediated by a number of factors including physiological growth regulators and their associated signal transduction pathways. Protein kinases play a central role in signaling, including those involving pathogen response mechanisms. We previously demonstrated an active guanylate cyclase (GC) catalytic center in the brassinosteroid insensitive receptor (AtBRI1) within an active intracellular kinase domain resulting in dual enzymatic activity...
January 22, 2018: Plant Signaling & Behavior
https://www.readbyqxmd.com/read/29355146/development-standardization-of-an-in-house-igm-indirect-elisa-for-the-detection-of-parvovirus-b19-infections
#9
Kumaran Vadivel, Mageshbabu Ramamurthy, Sathish Sankar, Amita Jain, Padma Srikanth, Asit Ranjan Ghosh, Balaji Nandagopal, Aravindan Nair, Gopalan Sridharan
BACKGROUND & OBJECTIVES: Parvovirus B19 infections occur worldwide; the infection is acquired early in childhood but could occur later. B19 is reported to cause infection in childhood febrile illnesses, and arthropathies in adults and children and in end-stage renal disease (ESRD) seen in adults. This study was designed to develop an in-house IgM indirect ELISA for serological screening among patients and controls, and to compare ELISA results with those of nested polymerase chain reaction (nPCR) assay...
September 2017: Indian Journal of Medical Research
https://www.readbyqxmd.com/read/29355145/molecular-characterization-of-plasmodium-falciparum-in-arunachal-pradesh-from-northeast-india-based-on-merozoite-surface-protein-1-glutamate-rich-protein
#10
Nilanju Pran Sarmah, Kishore Sarma, Dibya Ranjan Bhattacharyya, Ali Sultan, Devendra Bansal, Neeru Singh, Praveen K Bharti, Hargobinder Kaur, Rakesh Sehgal, Pradyumna Kishore Mohapatra, Jagadish Mahanta
BACKGROUND & OBJECTIVES: Northeast (NE) India is one of the high endemic regions for malaria with a preponderance of Plasmodium falciparum, resulting in high morbidity and mortality. The P. falciparum parasite of this region showed high polymorphism in drug-resistant molecular biomarkers. However, there is a paucity of information related to merozoite surface protein 1 (msp-1) and glutamate-rich protein (glurp) which have been extensively studied in various parts of the world. The present study was, therefore, aimed at investigating the genetic diversity of P...
September 2017: Indian Journal of Medical Research
https://www.readbyqxmd.com/read/29354777/isolation-and-molecular-characterization-of-cryptococcus-species-isolated-from-pigeon-nests-and-eucalyptus-trees
#11
A Kamari, A Sepahvand, R Mohammadi
Background and Purpose: Cryptococcus species are pathogenic and non-pathogenic basidiomycete yeasts that are found widely in the environment. Based on phenotypic methods, this genus has many species; however, its taxonomy is presently being re-evaluated by modern techniques. The Cryptococcus species complex includes two sibling taxa of Cryptococcus neoformans and Cryptococcus gattii. We aimed to investigate the possible distribution of Cryptococcus species in pigeon nests and Eucalyptus trees in Ilam, Iran, using molecular techniques...
June 2017: Advances in Medical Mycology (Iran)
https://www.readbyqxmd.com/read/29354372/presence-of-16sriv-phytoplasmas-of-subgroups-a-d-and-e-in-planthopper-haplaxius-crudus-van-duzee-insects-in-yucat%C3%A3-n-mexico
#12
María Narváez, Roberto Vázquez-Euán, Nigel A Harrison, Germán Nic-Matos, Jean Francois Julia, Jean Luc Dzido, Sandrine Fabre, Michel Dollet, Carlos Oropeza
The present study was carried out to determine if group 16SrIV phytoplasmas, causing lethal yellowing (LY) disease, are present in Haplaxius crudus Van Duzee (Hemiptera: Cixiidae) insects associated with palms in Yucatán, Mexico. Haplaxius crudus feral insects were captured from palm foliage at two locations (Chicxulub Puerto and CICY, Mérida, where LY-type diseases are active) and evaluated individually for the presence of phytoplasma DNA by a group 16SrIV-specific nested PCR assay. The results showed positive detection in H...
January 2018: 3 Biotech
https://www.readbyqxmd.com/read/29353797/source-tagging-modeling-study-of-regional-contributions-to-acid-rain-in-summer-over-liaoning-province-northeastern-china
#13
Alex E Gbaguidi, Zifa Wang, Wei Wang, Ting Yang, Huan-Sheng Chen
Strong acid rain was recently observed over Northeastern China, particularly in summer in Liaoning Province where alkaline dust largely neutralized acids in the past. This seems to be related to the regional transboundary pollution and poses new challenges in acid rain control scheme in China. In order to delve into the regional transport impact, and quantify its potential contributions to such an "eruption" of acid rain over Liaoning, this paper employs an online source tagging model in coupling with the Nested Air Quality Prediction Modeling System (NAQPMS)...
January 16, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29353404/dna-methylation-rather-than-single-nucleotide-polymorphisms-regulates-the-production-of-an-aberrant-splice-variant-of-il6r-in-mastitic-cows
#14
Yan Zhang, Xiuge Wang, Qiang Jiang, Haisheng Hao, Zhihua Ju, Chunhong Yang, Yan Sun, Changfa Wang, Jifeng Zhong, Jinming Huang, Huabin Zhu
Interleukin-6 receptor-alpha (IL6R) interacts with IL6 and forms a ligand-receptor complex, which can stimulate various cellular responses, such as cell proliferation, cell differentiation, and activation of inflammatory processes. Both genetic mutation and epigenetic modification regulate gene transcription. We identified a novel splice variant of bovine IL6R, designated as IL6R-TV, which is characterized by the skipping of exon 2 of the NCBI-referenced IL6R gene (IL6R-reference). The expression levels of IL6R-TV and IL6R-reference transcripts were lower in normal mammary gland tissues...
January 20, 2018: Cell Stress & Chaperones
https://www.readbyqxmd.com/read/29352991/molecular-monitoring-of-dihydrofolatereductase-dhfr-and-dihydropteroatesynthetase-dhps-associated-with-sulfadoxine-pyrimethamine-resistance-in-plasmodium-vivax-isolates-of-palawan-philippines
#15
Alison Paolo Bareng, Fe Esperanza Espino, Wanna Chaijaroenkul, Kesara Na-Bangchang
The emergence of drug-resistant Plasmodium vivax poses problems for malaria control and elimination in some parts of the world, especially in developing countries where individuals are routinely exposed to the infection. The aim of this study was to determine the single nucleotide polymorphisms (SNPs) in dihydropteroate synthase (pvdhps) and dihydrofolate reductase (pvdhfr) genes associated with sulfadoxine-pyrimethamine (SP) drug resistance among P. vivax isolates collected in Palawan, Philippines. Genetic polymorphisms of pvdhps and pvdhfr were analysed by nested PCR...
January 15, 2018: Acta Tropica
https://www.readbyqxmd.com/read/29352496/microcystic-adnexal-carcinoma-with-sebaceous-differentiation-three-cases
#16
Angel Fernandez-Flores, Mar Llamas-Velasco, Carles Saus, Anisha Patel, Arno Rutten
Microcystic adnexal carcinoma (MAC) is a low-grade malignant tumor of the skin. Histologically, this tumor shows a biphasic pattern, with cords and nests of basaloid cells, as well as keratin horn cysts. This biphasic histological appearance has been interpreted by some authors as a sign of double eccrine and folliculosebaceous-apocrine differentiation, whereas some other authors defend an solely eccrine differentiation. In this context, sebaceous differentiation in MAC would support the first option. However, there are only three cases of MAC with sebaceous differentiation in the literature, and all of them are previous to adipophilin, which in the appropriate context (for example testing clear cells for sebaceous versus eccrine differentiation) is very useful...
January 20, 2018: Journal of Cutaneous Pathology
https://www.readbyqxmd.com/read/29352410/first-detection-of-murine-herpesvirus-68-in-adult-ixodes-ricinus-ticks
#17
Marcela Kúdelová, Monika Jánošová, Petra Belvončíková
Murine herpesvirus 68 (MHV-68) is a natural pathogen that infects murid rodents, which serves as hosts for Ixodes ricinus ticks. For the first time, MHV-68 was detected in immature I. ricinus ticks feeding on Lacerta viridis lizards trapped in Slovakia, which supports the idea that ticks can acquire the virus from feeding on infected hosts. The recent discovery of MHV-68 infection and MHV-68 M3 gene transcripts in Dermacentor reticulatus ticks collected in Slovakia also supports this suggestion. Here, for the first time, we report MHV-68 infection, which was detected by nested PCR, in I...
January 19, 2018: Folia Microbiologica
https://www.readbyqxmd.com/read/29352393/eco-friendly-pheromone-dispensers-a-green-route-to-manage-the-european-grapevine-moth
#18
Andrea Lucchi, Edith Ladurner, Andrea Iodice, Francesco Savino, Renato Ricciardi, Francesca Cosci, Giuseppe Conte, Giovanni Benelli
The development of environmentally sustainable control strategies to fight insect pests is a key challenge nowadays. Pheromone-mediated mating disruption (MD) is based on the release of synthetic sex attractants into a crop, interfering with mate finding of a given pest species. However, a limited number of research items have been published on the optimization of MD strategies against the European grapevine moth, Lobesia botrana, as well as on the use of biodegradable dispensers to reduce waste production in vineyards, despite the high economic importance of this pest...
January 19, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29352267/differential-susceptibility-of-striatal-hippocampal-and-cortical-neurons-to-caspase-6
#19
Anastasia Noël, Libin Zhou, Bénédicte Foveau, P Jesper Sjöström, Andréa C LeBlanc
Active cysteinyl protease Caspase-6 is associated with early Alzheimer and Huntington diseases. Higher entorhinal cortex and hippocampal Caspase-6 levels correlate with lower cognitive performance in aged humans. Caspase-6 induces axonal degeneration in human primary neuron cultures and causes inflammation and neurodegeneration in mouse hippocampus, and age-dependent memory impairment. To assess whether Caspase-6 causes damage to another neuronal system, a transgenic knock-in mouse overexpressing a self-activated form of Caspase-6 five-fold in the striatum, the area affected in Huntington disease, and 2...
January 19, 2018: Cell Death and Differentiation
https://www.readbyqxmd.com/read/29352257/robust-phenotype-prediction-from-gene-expression-data-using-differential-shrinkage-of-co-regulated-genes
#20
Kourosh Zarringhalam, David Degras, Christoph Brockel, Daniel Ziemek
Discovery of robust diagnostic or prognostic biomarkers is a key to optimizing therapeutic benefit for select patient cohorts - an idea commonly referred to as precision medicine. Most discovery studies to derive such markers from high-dimensional transcriptomics datasets are weakly powered with sample sizes in the tens of patients. Therefore, highly regularized statistical approaches are essential to making generalizable predictions. At the same time, prior knowledge-driven approaches have been successfully applied to the manual interpretation of high-dimensional transcriptomics datasets...
January 19, 2018: Scientific Reports
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