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https://www.readbyqxmd.com/read/28929027/the-role-of-polycarbonate-monomer-bisphenol-a-in-insulin-resistance
#1
Milos Pjanic
Bisphenol A (BPA) is a synthetic unit of polycarbonate polymers and epoxy resins, the types of plastics that could be found in essentially every human population and incorporated into almost every aspect of the modern human society. BPA polymers appear in a wide range of products, from liquid storages (plastic bottles, can and glass linings, water pipes and tanks) and food storages (plastics wraps and containers), to medical and dental devices. BPA polymers could be hydrolyzed spontaneously or in a photo- or temperature-catalyzed process, providing widespread environmental distribution and chronic exposure to the BPA monomer in contemporary human populations...
2017: PeerJ
https://www.readbyqxmd.com/read/28924459/genetic-code-optimization-for-cotranslational-protein-folding-codon-directional-asymmetry-correlates-with-antiparallel-betasheets-trna-synthetase-classes
#2
Hervé Seligmann, Ganesh Warthi
A new codon property, codon directional asymmetry in nucleotide content (CDA), reveals a biologically meaningful genetic code dimension: palindromic codons (first and last nucleotides identical, codon structure XZX) are symmetric (CDA = 0), codons with structures ZXX/XXZ are 5'/3' asymmetric (CDA = - 1/1; CDA = - 0.5/0.5 if Z and X are both purines or both pyrimidines, assigning negative/positive (-/+) signs is an arbitrary convention). Negative/positive CDAs associate with (a) Fujimoto's tetrahedral codon stereo-table; (b) tRNA synthetase class I/II (aminoacylate the 2'/3' hydroxyl group of the tRNA's last ribose, respectively); and (c) high/low antiparallel (not parallel) betasheet conformation parameters...
2017: Computational and Structural Biotechnology Journal
https://www.readbyqxmd.com/read/28923543/selective-glucocorticoid-receptor-modulation-inhibits-cytokine-responses-in-a-canine-model-of-mild-endotoxemia
#3
J Bartko, U Derhaschnig, T Neels, G H Nabozny, C Harcken, J Leuschner, F De Vries, B Jilma
Selective glucocorticoid receptor modulators (GRMs) promise to reduce adverse events of glucocorticoids while maintaining anti-inflammatory potency. The present study tested the anti-inflammatory activity of two novel non-steroidal GRMs (GRM1: BI 607812 BS, GRM2: BI 653048 BS*H3PO4) in comparison to prednisolone in a canine model of low dose endotoxemia. This study compared the anti-inflammatory and pharmacokinetic profile of escalating daily oral doses of GRM1 (1, 2.5, 5 and 10mg/kg) and GRM2 (0.1, 0.25 and 1mg/kg) with prednisolone (0...
September 15, 2017: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/28923118/hypothermia-for-encephalopathy-in-low-and-middle-income-countries-helix-study-protocol-for-a-randomised-controlled-trial
#4
Sudhin Thayyil, Vania Oliveira, Peter J Lally, Ravi Swamy, Paul Bassett, Mani Chandrasekaran, Jayashree Mondkar, Sundaram Mangalabharathi, Naveen Benkappa, Arasar Seeralar, Mohammod Shahidullah, Paolo Montaldo, Jethro Herberg, Swati Manerkar, Kumutha Kumaraswami, Chinnathambi Kamalaratnam, Vinayagam Prakash, Rema Chandramohan, Prathik Bandya, Mohammod Abdul Mannan, Ranmali Rodrigo, Mohandas Nair, Siddarth Ramji, Seetha Shankaran
BACKGROUND: Therapeutic hypothermia reduces death and disability after moderate or severe neonatal encephalopathy in high-income countries and is used as standard therapy in these settings. However, the safety and efficacy of cooling therapy in low- and middle-income countries (LMICs), where 99% of the disease burden occurs, remains unclear. We will examine whether whole body cooling reduces death or neurodisability at 18-22 months after neonatal encephalopathy, in LMICs. METHODS: We will randomly allocate 408 term or near-term babies (aged ≤ 6 h) with moderate or severe neonatal encephalopathy admitted to public sector neonatal units in LMIC countries (India, Bangladesh or Sri Lanka), to either usual care alone or whole-body cooling with usual care...
September 18, 2017: Trials
https://www.readbyqxmd.com/read/28919880/non-mammalian-vertebrates-distinct-models-to-assess-the-role-of-ion-gradients-in-energy-expenditure
#5
REVIEW
Caroline E Geisler, Kyle P Kentch, Benjamin J Renquist
Animals store metabolic energy as electrochemical gradients. At least 50% of mammalian energy is expended to maintain electrochemical gradients across the inner mitochondrial membrane (H(+)), the sarcoplasmic reticulum (Ca(++)), and the plasma membrane (Na(+)/K(+)). The potential energy of these gradients can be used to perform work (e.g., transport molecules, stimulate contraction, and release hormones) or can be released as heat. Because ectothermic species adapt their body temperature to the environment, they are not constrained by energetic demands that are required to maintain a constant body temperature...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28919266/rock-bream-iridovirus-rbiv-replication-in-rock-bream-oplegnathus-fasciatus-exposed-for-different-time-periods-to-susceptible-water-temperatures
#6
Myung-Hwa Jung, Chamilani Nikapitiya, Tharabenahalli-Nagaraju Vinay, Jehee Lee, Sung-Ju Jung
Rock bream iridovirus (RBIV) is a member of the Megalocytivirus genus that causes severe mortality to rock bream. Water temperature is known to affect the immune system and susceptibility of fish to RBIV infection. In this study, we evaluated the time dependent virus replication pattern and time required to completely eliminate virus from the rock bream body against RBIV infection at different water temperature conditions. The rock bream was exposed to the virus and held at 7 (group A1), 4 (group A2) and 2 days (group A3) at 23 °C before the water temperature was reduced to 17 °C...
September 15, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28918009/low-temperature-degradation-of-single-layers-of-multilayered-zirconia-in-comparison-to-conventional-unshaded-zirconia-phase-transformation-and-flexural-strength
#7
Sebastian Wille, Paul Zumstrull, Victor Kaidas, Lea Katharina Jessen, Matthias Kern
OBJECTIVES: The aim of this study was to evaluate the transformation of yttrium stabilized tetragonal zirconia (Y-TZP) to monoclinic phase and its change in flexural strength of the various layers of multilayered zirconia (enamel layer, transition layer 1, transition layer 2 and body layer) in comparison to two conventional zirconia ceramics. Additionally, the ball-on-three-balls test was compared with a conventional biaxial flexural strength test. METHODS: The crystallographic structure of the four layers of Katana Zirconia ML (Kuraray), e...
September 8, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28916383/heterologous-expression-and-structure-function-relationship-of-low-temperature-and-alkaline-active-protease-from-acinetobacter-sp-ihb-b-5011-mn12
#8
Richa Salwan, Vivek Sharma, Mohinder Pal, Ramesh Chand Kasana, Sudesh Kumar Yadav, Arvind Gulati
The gene encoding protease from Acinetobacter sp. IHB B 5011(MN12) was cloned and expressed in Escherichia coli BL21(DE3). The nucleotide sequence revealed 1323bp ORF encoding 441 amino acids protein with molecular weight 47.2kDa. The phylogenetic analysis showed clustering of Alp protease with subtilisin-like serine proteases of S8 family. The amino acid sequence was comprised of N-terminal signal peptide 1-21 amino acids, pre-peptide 22-143 amino acids, peptidase S8 domain 144-434 amino acids, and pro-peptide 435-441 amino acids at C-terminus...
September 12, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28912552/under-ice-availability-of-phytoplankton-lipids-is-key-to-freshwater-zooplankton-winter-survival
#9
Guillaume Grosbois, Heather Mariash, Tobias Schneider, Milla Rautio
Shortening winter ice-cover duration in lakes highlights an urgent need for research focused on under-ice ecosystem dynamics and their contributions to whole-ecosystem processes. Low temperature, reduced light and consequent changes in autotrophic and heterotrophic resources alter the diet for long-lived consumers, with consequences on their metabolism in winter. We show in a survival experiment that the copepod Leptodiaptomus minutus in a boreal lake does not survive five months under the ice without food...
September 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28912020/intestinal-dysbiosis-featuring-abundance-of-ruminococcus-gnavus-associates-with-allergic-diseases-in-infants
#10
Huey-Huey Chua, Hung-Chieh Chou, Ya-Ling Tung, Bor-Luen Chiang, Chien-Chia Liao, Hong-Hsing Liu, Yen-Hsuan Ni
BACKGROUND & AIMS: Dysbiosis of the intestinal microbiota has been associated with development of allergies in infants. However, it is not clear what microbes might contribute to this process. We investigated what microbe(s) might be involved in analyses of infant twins and mice. METHODS: We studied fecal specimens prospectively in a twin cohort (n=30) and age-matched singletons (n=14) born at National Taiwan University Children's Hospital, Taipei, Taiwan, from April 2011 to March 2013...
September 11, 2017: Gastroenterology
https://www.readbyqxmd.com/read/28906432/total-power-radiometer-for-medical-sensor-applications-using-matched-and-mismatched-noise-sources
#11
Woojin Park, Jinho Jeong
This paper presents a simple total power radiometer to noninvasively measure the temperature of the human body. The proposed 3-GHz radiometer consists of an antenna collecting the noise power generated by a target, a low-noise and high-gain receiver amplifying the noise power, and a detector converting the noise power to voltage. A single-pole-triple-throw (SP3T) switch is placed between the antenna and the receiver, while a personal computer is used to control the SP3T switch, collect and process the data such as detector output voltages and physical temperatures of the reference noise sources and the target...
September 14, 2017: Sensors
https://www.readbyqxmd.com/read/28906151/photopolymerization-based-synthesis-of-iron-oxide-nanoparticle-embedded-pnipam-nanogels-for-biomedical-applications
#12
Daniel J Denmark, Robert H Hyde, Charlotte Gladney, Manh-Huong Phan, Kirpal S Bisht, Hariharan Srikanth, Pritish Mukherjee, Sarath Witanachchi
Conventional therapeutic techniques treat patients by delivering biotherapeutics to the entire body. With targeted delivery, biotherapeutics are transported to the afflicted tissue reducing exposure to healthy tissue. Targeted delivery devices are minimally composed of a stimuli responsive polymer allowing triggered release and magnetic nanoparticles enabling targeting as well as alternating magnetic field (AMF) heating. Although more traditional methods, like emulsion polymerization, have been used to realize such devices, the synthesis is problematic...
November 2017: Drug Delivery
https://www.readbyqxmd.com/read/28905134/postmortem-mr-diffusion-weighted-imaging-of-the-liver-time-behavior-of-the-hepatic-apparent-diffusion-coefficient-in-the-early-death-interval
#13
Sarah Keller, Tony M Schmidt, Anne Catherine Kim, Roland Fischer, Axel Heinemann, Gerhard Adam, Jin Yamamura
OBJECTIVE: The objective of this study is to assess postmortem changes of the hepatic apparent diffusion coefficient (ADC) at multiple time points in the time interval of 16 hours postmortem in comparison to in vivo controls and to literature data. MATERIAL AND METHODS: Hepatic diffusion-weighted imaging (DWI) was repeatedly performed at 1.5 Tesla (b values 50, 400, and 800 s/mm(2)) in 2-hourly steps within 16 hours postmortem in 19 cases (male to female 13:6, mean age 68...
September 14, 2017: International Journal of Legal Medicine
https://www.readbyqxmd.com/read/28902571/pain-perception-and-body-awareness-among-individuals-with-borderline-personality-disorder
#14
Karni Ginzburg, Iftah Biran, Itay Goor Aryeh, Noga Tsur, Ruth Defrin
Studies indicate that individuals with borderline personality disorder (BPD) often demonstrate attenuated pain perception, termed hypoalgesia. This study examines the hypothesis that body awareness moderates the association between BPD and pain perception. Participants consisted of 46 women diagnosed with BPD and 47 healthy controls. Sensory testing included the measurement of heat-pain thresholds, ratings of suprathreshold stimuli, measurement of temperature evoking moderate pain, and temporal summation of noxious mechanical stimuli...
September 13, 2017: Journal of Personality Disorders
https://www.readbyqxmd.com/read/28895899/effects-of-heat-stress-on-construction-labor-productivity-in-hong-kong-a-case-study-of-rebar-workers
#15
Wen Yi, Albert P C Chan
Global warming is bringing more frequent and severe heat waves, and the result will be serious for vulnerable populations such as construction workers. Excessive heat stress has profound effects on physiological responses, which cause occupational injuries, fatalities and low productivity. Construction workers are particularly affected by heat stress, because of the body heat production caused by physically demanding tasks, and hot and humid working conditions. Field studies were conducted between August and September 2016 at two construction training grounds in Hong Kong...
September 12, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28888695/characterization-of-seasonal-reproductive-and-stress-steroid-hormones-in-wild-radiated-tortoises-astrochelys-radiata
#16
Andrea F T Currylow, Tsilavo H Rafeliarisoa, Edward E Louis, Craig B Stanford, Soary T Randrianjafizanaka, Sarah M Chinn, Daniel E Crocker
The critically endangered Radiated Tortoise (Astrochelys radiata) is endemic to the southern coastlines of Madagascar. Once common, wild populations of this tortoise have undergone dramatic declines in recent years. Although there have been studies documenting reproductive activities, reproductive physiological parameters are unknown yet may be crucial in the recovery of the species. Over four research seasons in remote field locations native to A. radiata, we surveyed for, radio-tracked, and sampled wild, free ranging tortoises...
September 6, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/28887638/a-new-strategy-to-sustained-release-of-ocular-drugs-by-one-step-drug-loaded-microcapsule-manufacturing-in-hydrogel-punctal-plugs
#17
Jiajun Xie, Changjun Wang, Qingyao Ning, Qi Gao, Changyou Gao, Zhongru Gou, Juan Ye
PURPOSE: To design an injectable hyaluronate (HA)-based hydrogel system that contains drug-loaded microcapsules as resorbable plugs to deliver ocular drugs. METHODS: In-situ drug-loaded, core-shell-structured chitosan (CS)@HA microcapsules were fabricated via HA hydrosol collecting in electrospun bead-rich CS fibers under continuous stirring. An injectable and cytocompatible hydrogel system with different degrees of chemical crosslinking maintained viscoelastic and sustained drug release for a long-term period of time at body temperature in vitro...
September 8, 2017: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/28886399/effectiveness-of-a-measure-program-to-prevent-admission-hypothermia-in-very-low-birth-weight-preterm-infants
#18
Jamil Pedro de Siqueira Caldas, Fernanda de Castro Millen, Juliana Fernandes de Camargo, Paula Almeida Cavalcanti Castro, Ana Letícia da Fonseca Camilo, Sérgio Tadeu Martins Marba
OBJECTIVE: To evaluate the effectiveness of a thermoregulation bundle for preventing admission hypothermia (AH) in very low-birth weight preterm infants. METHODS: Interventional study with retrospective evaluation of data undertaken in a tertiary neonatal unit including all very low-birth weight preterm infants (<1500g) born at and admitted to the unit. Two periods were compared: before intervention (PI; 01/01/2012 to 02/28/2014_ and after intervention (PII; 04/01/2014 to 11/30/2016)...
September 5, 2017: Jornal de Pediatria
https://www.readbyqxmd.com/read/28882438/biodistribution-and-safety-of-a-live-attenuated-tetravalent-dengue-vaccine-in-the-cynomolgus-monkey
#19
Guillaume Ravel, Nathalie Mantel, Jeremy Silvano, Alexandra Rogue, Bruno Guy, Nicholas Jackson, Nicolas Burdin
BACKGROUND: The first licensed dengue vaccine is a recombinant, live, attenuated, tetravalent dengue virus vaccine (CYD-TDV; Sanofi Pasteur). This study assessed the biodistribution, shedding, and toxicity of CYD-TDV in a non-human primate model as part of the nonclinical safety assessment program for the vaccine. METHODS: Cynomolgus monkeys were given one subcutaneous injection of either one human dose (5log10 CCID50/serotype) of CYD-TDV or saline control. Study endpoints included clinical observations, body temperature, body weight, food consumption, clinical pathology, immunogenicity, and post-mortem examinations including histopathology...
September 4, 2017: Vaccine
https://www.readbyqxmd.com/read/28881936/searching-for-biotic-multipliers-of-climate-change
#20
Mark C Urban, Phoebe L Zarnetske, David K Skelly
As climates change, biologists need to prioritize which species to understand, predict, and protect. One way is to identify key species that are both sensitive to climate change and that disproportionately affect communities and ecosystems. These "biotic multipliers" provide efficient targets for research and conservation. Here, we propose eight mechanistic hypotheses related to impact and sensitivity that suggest that top consumers might often act as biotic multipliers of climate change. For impact, top consumers often affect communities and ecosystems through strong top-down effects...
July 1, 2017: Integrative and Comparative Biology
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