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Multiple Chemical Sensitivities

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https://www.readbyqxmd.com/read/28544647/dual-cross-linked-biofunctional-and-self-healing-networks-to-generate-user-defined-modular-gradient-hydrogel-constructs
#1
Zhao Wei, Daniel M Lewis, Yu Xu, Sharon Gerecht
Gradient hydrogels have been developed to mimic the spatiotemporal differences of multiple gradient cues in tissues. Current approaches used to generate such hydrogels are restricted to a single gradient shape and distribution. Here, a hydrogel is designed that includes two chemical cross-linking networks, biofunctional, and self-healing networks, enabling the customizable formation of modular gradient hydrogel construct with various gradient distributions and flexible shapes. The biofunctional networks are formed via Michael addition between the acrylates of oxidized acrylated hyaluronic acid (OAHA) and the dithiol of matrix metalloproteinase (MMP)-sensitive cross-linker and RGD peptides...
May 23, 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/28543285/changes-in-monosaccharides-organic-acids-and-amino-acids-during-cabernet-sauvignon-wine-aging-based-on-a-simultaneous-analysis-using-gas-chromatography-mass-spectrometry
#2
Xin-Ke Zhang, Yi-Bin Lan, Bao-Qing Zhu, Xiao-Feng Xiang, Chang-Qing Duan, Ying Shi
BACKGROUND: Monosaccharides, organic acids and amino acids are the important flavor-related components in wines. The aim of this article is to develop and validate a method that could simultaneously analyze these compounds in wine based on silylation derivatization and gas chromatography-mass spectrometry (GC-MS), and apply this method on the investigation of the changes of these compounds and speculate their related influences on Cabernet Sauvignon wine flavor during wine aging. This work presented a new approach for wine analysis and provided more information concerning red wine aging...
May 25, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28537025/prediction-of-dissolved-oxygen-concentration-in-hypoxic-river-systems-using-support-vector-machine-a-case-study-of-wen-rui-tang-river-china
#3
Xiaoliang Ji, Xu Shang, Randy A Dahlgren, Minghua Zhang
Accurate quantification of dissolved oxygen (DO) is critically important for managing water resources and controlling pollution. Artificial intelligence (AI) models have been successfully applied for modeling DO content in aquatic ecosystems with limited data. However, the efficacy of these AI models in predicting DO levels in the hypoxic river systems having multiple pollution sources and complicated pollutants behaviors is unclear. Given this dilemma, we developed a promising AI model, known as support vector machine (SVM), to predict the DO concentration in a hypoxic river in southeastern China...
May 23, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28528666/role-of-nonneuronal-trpv4-signaling-in-inflammatory-processes
#4
Pradeep Rajasekhar, Daniel P Poole, Nicholas A Veldhuis
Transient receptor potential (TRP) ion channels are important signaling components in nociceptive and inflammatory pathways. This is attributed to their ability to function as polymodal sensors of environmental stimuli (chemical and mechanical) and as effector molecules in receptor signaling pathways. TRP vanilloid 4 (TRPV4) is a nonselective cation channel that is activated by multiple endogenous stimuli including shear stress, membrane stretch, and arachidonic acid metabolites. TRPV4 contributes to many important physiological processes and dysregulation of its activity is associated with chronic conditions of metabolism, inflammation, peripheral neuropathies, musculoskeletal development, and cardiovascular regulation...
2017: Advances in Pharmacology
https://www.readbyqxmd.com/read/28523649/highly-sensitive-detection-of-ionizing-radiations-by-a-photoluminescent-uranyl-organic-framework
#5
Jian Xie, Yaxing Wang, Wei Liu, Xuemiao Yin, Lanhua Chen, Youming Zou, Juan Diwu, Zhifang Chai, Thomas E Albrecht-Schmitt, Guokui Liu, Shuao Wang
Precise detection of low-dose X- and γ-radiations remains a challenge and is particularly important for studying biological effects under low-dose ionizing radiation, safety control in medical radiation treatment, survey of environmental radiation background, and monitoring cosmic radiations. We report here a photoluminescent uranium organic framework, whose photoluminescence intensity can be accurately correlated with the exposure dose of X- or γ-radiations. This allows for precise and instant detection of ionizing radiations down to the level of 10(-4)  Gy, representing a significant improvement on the detection limit of approximately two orders of magnitude, compared to other chemical dosimeters reported up to now...
May 19, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28503196/synthesis-and-analysis-of-separation-networks-for-the-recovery-of-intracellular-chemicals-generated-from-microbial-based-conversions
#6
Kirti M Yenkie, Wenzhao Wu, Christos T Maravelias
BACKGROUND: Bioseparations can contribute to more than 70% in the total production cost of a bio-based chemical, and if the desired chemical is localized intracellularly, there can be additional challenges associated with its recovery. Based on the properties of the desired chemical and other components in the stream, there can be multiple feasible options for product recovery. These options are composed of several alternative technologies, performing similar tasks. The suitability of a technology for a particular chemical depends on (1) its performance parameters, such as separation efficiency; (2) cost or amount of added separating agent; (3) properties of the bioreactor effluent (e...
2017: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/28501025/effects-of-unintentional-pcbs-in-pigments-and-chemical-products-on-transcriptional-activity-via-aryl-hydrocarbon-and-nuclear-hormone-receptors
#7
Shinji Takeuchi, Katsunori Anezaki, Hiroyuki Kojima
In recent years, some pigments and chemical products have been reported to contain polychlorinated biphenyl (PCB) congeners as unintentional byproducts, and these have also been detected in residential environments from indoor air and house dust. In this study, using in vitro reporter gene assays, we characterized the agonistic and antagonistic activities of a total of 25 PCB congeners contained in pigments (PCB-1 to -16, -20, -35, -40, -52, -56, -77, -101, -126, and -153) against five nuclear hormone receptors, (estrogen receptor (ER) α/β, glucocorticoid receptor (GR), androgen receptor (AR), thyroid hormone receptor (TR) α1) and aryl hydrocarbon receptor (AhR)...
May 10, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28500962/the-methylation-levels-of-the-h19-differentially-methylated-region-in-human-umbilical-cords-reflect-newborn-parameters-and-changes-by-maternal-environmental-factors-during-early-pregnancy
#8
Hidenobu Miyaso, Kenichi Sakurai, Shunya Takase, Akifumi Eguchi, Masahiro Watanabe, Hideoki Fukuoka, Chisato Mori
H19 is a tumor-suppressor gene, and changes in the methylation of the H19-differential methylation region (H19-DMR) are related to human health. However, little is known about the factors that regulate the methylation levels of H19-DMR. Several recent studies have shown that maternal environmental factors during pregnancy, such as smoking, drinking, chemical exposure, and nutrient intake, can alter the methylation levels of several genes in fetal tissues. In this study, we examined the effects of maternal factors on changes in the methylation levels of H19-DMR in the human umbilical cord (UC), an extra-embryonic tissue...
May 10, 2017: Environmental Research
https://www.readbyqxmd.com/read/28499120/characterising-bias-in-regulatory-risk-and-decision-analysis-an-analysis-of-heuristics-applied-in-health-technology-appraisal-chemicals-regulation-and-climate-change-governance
#9
Brian H MacGillivray
In many environmental and public health domains, heuristic methods of risk and decision analysis must be relied upon, either because problem structures are ambiguous, reliable data is lacking, or decisions are urgent. This introduces an additional source of uncertainty beyond model and measurement error - uncertainty stemming from relying on inexact inference rules. Here we identify and analyse heuristics used to prioritise risk objects, to discriminate between signal and noise, to weight evidence, to construct models, to extrapolate beyond datasets, and to make policy...
May 9, 2017: Environment International
https://www.readbyqxmd.com/read/28495097/workflow-development-for-targeted-lipidomic-quantification-using-parallel-reaction-monitoring-on-a-quadrupole-time-of-flight-mass-spectrometry
#10
Juntuo Zhou, Chunlei Liu, Dandan Si, Bing Jia, Lijun Zhong, Yuxin Yin
Advances in high-resolution mass spectrometers with faster scanning capabilities and higher sensitivities have expanded these instruments' functionality beyond traditional data-dependent acquisition in targeted metabolomics. Apart from the traditional multiple reaction monitoring strategy, the parallel reaction monitoring (PRM) strategy is also used for targeted metabolomics quantification. The high resolution and mass accuracy of full-scan (MS1) and tandem mass spectrometry (MS/MS) scan result in sufficient selectivity by monitoring all MS/MS fragment ions for each target precursor and simultaneously providing flexibility in assay method construction and post-acquisition data analysis...
June 15, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28489985/preclinical-evaluation-of-the-imipridone-family-analogues-of-clinical-stage-anti-cancer-small-molecule-onc201-reveals-potent-anti-cancer-effects-of-onc212
#11
Jessica Wagner, Christina Leah Kline, Marie D Ralff, Avital Lev, Amriti Lulla, Lanlan Zhou, Gary L Olson, Bhaskara Rao Nallaganchu, Cyril H Benes, Joshua E Allen, Varun V Prabhu, Martin Stogniew, Wolfgang Oster, Wafik S El-Deiry
Anti-cancer small molecule ONC201 upregulates the integrated stress response (ISR) and acts as a dual inactivator of Akt/ERK, leading to TRAIL gene activation. ONC201 is under investigation in multiple clinical trials to treat patients with cancer. Given the unique imipridone core chemical structure of ONC201, we synthesized a series of analogues to identify additional compounds with distinct therapeutic properties. Several imipridones with a broad range of in vitro potencies were identified in an exploration of chemical derivatives...
May 10, 2017: Cell Cycle
https://www.readbyqxmd.com/read/28485498/plasmonic-nanoparticles-decorated-diatomite-biosilica-extending-the-horizon-of-on-chip-chromatography-and-label-free-biosensing
#12
Xianming Kong, Erwen Li, Kenny Squire, Ye Liu, Bo Wu, Li-Jing Cheng, Alan X Wang
Diatomite consists of fossilized remains of ancient diatoms and is a type of naturally abundant photonic crystal biosilica with multiple unique physical and chemical functionalities. In this paper, we explored the fluidic properties of diatomite as the matrix for on-chip chromatography and, simultaneously, the photonic crystal effects to enhance the plasmonic resonances of metallic nanoparticles for surface-enhanced Raman scattering (SERS) biosensing. The plasmonic nanoparticle-decorated diatomite biosilica provides a lab-on-a-chip capability to separate and detect small molecules from mixture samples with ultra-high detection sensitivity down to 1 ppm...
May 9, 2017: Journal of Biophotonics
https://www.readbyqxmd.com/read/28474409/amide-proton-transfer-cest-of-the-cervical-spinal-cord-in-multiple-sclerosis-patients-at-3t
#13
Samantha By, Robert L Barry, Alex K Smith, Bailey D Lyttle, Bailey A Box, Francesca R Bagnato, Siddharama Pawate, Seth A Smith
PURPOSE: The ability to evaluate pathological changes in the spinal cord in multiple sclerosis (MS) is limited because T1 - and T2 -w MRI imaging are not sensitive to biochemical changes in vivo. Amide proton transfer (APT) chemical exchange saturation transfer (CEST) can indirectly detect amide protons associated with proteins and peptides, potentially providing more pathological specificity. Here, we implement APT CEST in the cervical spinal cord of healthy and MS cohorts at 3T. METHODS: APT CEST of the cervical spinal cord was obtained in a cohort of 10 controls and 10 MS patients using a novel respiratory correction methodology...
May 5, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28464759/endocrine-disrupting-chemicals-mechanisms-of-action-on-male-reproductive-system
#14
Iwona Sidorkiewicz, Kamil Zaręba, Sławomir Wołczyński, Jan Czerniecki
Endocrine-disrupting chemicals (EDCs) are exogenous compounds that can cause disturbances in the endocrine system and have multiple harmful effects on health by targeting different organs and systems in the human body. Mass industrial production and widespread use of EDCs have resulted in worldwide contamination. Accumulating evidence suggest that human exposure to EDCs is related to the impairment of male reproductive function and can interrupt other hormonally regulated metabolic processes, particularly if exposure occurs during early development...
January 1, 2017: Toxicology and Industrial Health
https://www.readbyqxmd.com/read/28460293/an-innovative-and-integrative-assay-for-toxicity-testing-using-individual-fish-embryos-application-to-oxazepam
#15
Philippine Granger Joly de Boissel, Patrice Gonzalez, Audrey Buleté, Guillemine Daffe, Christelle Clérandeau, Emmanuelle Vulliet, Jérôme Cachot
This paper describes the development of an integrative embryo-toxicity assay in Japanese medaka allowing analysis of several toxicological endpoints together in a same individual. In this assay, embryos are topically exposed, and survival, hatching success, malformations, biometry, behaviour, and target gene expression are subsequently analysed in each individual. This assay was applied to oxazepam, an anxiolytic pharmaceutical compound currently found in wastewater treatment plant effluent. Even if oxazepam accumulation in embryos was very low, it caused spinal and cardiac malformations, delayed growth, erratic swimming and deregulation of genes involved in apoptosis, DNA repair and mitochondrial metabolism...
April 17, 2017: Chemosphere
https://www.readbyqxmd.com/read/28459242/steric-enforcement-about-one-thiolate-donor-leads-to-new-oxidation-chemistry-in-a-nisod-model-complex
#16
Phan T Truong, Eric M Gale, Stephen P Dzul, Timothy L Stemmler, Todd C Harrop
Ni-containing superoxide dismutase (NiSOD) represents an unusual member of the SOD family due to the presence of oxygen-sensitive Ni-SCys bonds at its active site. Reported in this account is the synthesis and properties of the Ni(II) complex of the N3S2 ligand [N3S2(Me2)](3-) ([N3S2(Me2)](3-) = deprotonated form of 2-((2-mercapto-2-methylpropyl)(pyridin-2-ylmethyl)amino)-N-(2-mercaptoethyl)acetamide), namely Na[Ni(N3S2(Me2))] (2), as a NiSOD model that features sterically robust gem-(CH3)2 groups on the thiolate α-C positioned trans to the carboxamide...
May 1, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28455231/multiple-functional-attributes-of-glucose-monitoring-neurons-in-the-medial-orbitofrontal-ventrolateral-prefrontal-cortex
#17
REVIEW
István Szabó, Edina Hormay, Bettina Csetényi, Bernadett Nagy, László Lénárd, Zoltán Karádi
Multiple functional attributes of glucose-monitoring neurons in the medial orbitofrontal (ventrolateral prefrontal) cortex. NEUROSCI BIOBEHAV REV 73(1) XXX-XXX, 2017.- Special chemosensory cells, the glucose-monitoring (GM) neurons, reportedly involved in the central feeding control, exist in the medial orbitofrontal (ventrolateral prefrontal) cortex (mVLPFC). Electrophysiological, metabolic and behavioral studies reveal complex functional attributes of these cells and raise their homeostatic significance. Single neuron recordings, by means of the multibarreled microelectrophoretic technique, elucidate differential sensitivities of limbic forebrain neurons in the rat and the rhesus monkey to glucose and other chemicals, whereas gustatory stimulations demonstrate their distinct taste responsiveness...
April 25, 2017: Neuroscience and Biobehavioral Reviews
https://www.readbyqxmd.com/read/28451676/unravelling-the-mysteries-of-sub-second-biochemical-processes-using-time-resolved-mass-spectrometry
#18
Cristina Lento, Derek J Wilson
Many important chemical and biochemical phenomena proceed on sub-second time scales before entering equilibrium. In this mini-review, we explore the history and recent advancements of time-resolved mass spectrometry (TRMS) for the characterization of millisecond time-scale chemical reactions and biochemical processes. TRMS allows for the simultaneous tracking of multiple reactants, intermediates and products with no chromophoric species required, high sensitivity and temporal resolution. The method has most recently been used for the characterization of several short-lived reaction intermediates in rapid chemical reactions...
April 28, 2017: Analyst
https://www.readbyqxmd.com/read/28447210/mitf-suppression-by-ch5552074-inhibits-cell-growth-in-melanoma-cells
#19
Satoshi Aida, Yukiko Sonobe, Munehiro Yuhki, Kiyoaki Sakata, Toshihiko Fujii, Hiroshi Sakamoto, Takakazu Mizuno
PURPOSE: Although treatment of melanoma with BRAF inhibitors and immune checkpoint inhibitors achieves a high response rate, a subset of melanoma patients with intrinsic and acquired resistance are insensitive to these therapeutics, so to improve melanoma therapy other target molecules need to be found. Here, we screened our chemical library to identify an anti-melanoma agent and examined its action mechanisms to show cell growth inhibition activity. METHODS: We screened a chemical library against multiple skin cancer cell lines and conducted ingenuity pathway analysis (IPA) to investigate the mechanisms of CH5552074 activity...
June 2017: Cancer Chemotherapy and Pharmacology
https://www.readbyqxmd.com/read/28447135/-environmental-medical-syndromes
#20
REVIEW
Gerhard A Wiesmüller, Claudia Hornberg
Environmental medical syndromes comprise sick building syndrome (SBS), multiple chemical sensitivity (MCS)/idiopathic environmental intolerances (IEI), electromagnetic hypersensitivity, chronic fatigue syndrome (CFS), burnout, fibromyalgia, and the candida syndrome. There is also some overlap described in the literature. There is still no established knowledge of etiology, pathology, pathophysiology, diagnostics, therapy, prevention and prognosis. These syndromes are thought to result from a complex interaction of physical, chemical and/or (micro)biological environmental stresses, individual dispositions, psychological influencing factors, perceptual and processing processes, variants of somatization disorders, culturally or socially caused distress, or simply iatrogenic causation...
April 26, 2017: Bundesgesundheitsblatt, Gesundheitsforschung, Gesundheitsschutz
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