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https://www.readbyqxmd.com/read/29793030/sorption-of-perfluoroalkyl-substances-pfass-to-an-organic-soil-horizon-effect-of-cation-composition-and-ph
#1
Hugo Campos Pereira, Malin Ullberg, Dan Berggren Kleja, Jon Petter Gustafsson, Lutz Ahrens
Accurate prediction of the sorption of perfluoroalkyl substances (PFASs) in soils is essential for environmental risk assessment. We investigated the effect of solution pH and calculated soil organic matter (SOM) net charge on the sorption of 14 PFASs onto an organic soil as a function of pH and added concentrations of Al3+ , Ca2+ and Na+ . Often, the organic C-normalized partitioning coefficients (KOC ) showed a negative relationship to both pH (Δlog KOC /ΔpH = -0.32 ± 0.11 log units) and the SOM bulk net negative charge (Δlog KOC  = -1...
May 4, 2018: Chemosphere
https://www.readbyqxmd.com/read/29792991/codon-adaptation-biases-among-sylvatic-and-urban-genotypes-of-dengue-virus-type-2
#2
Marielton Dos Passos Cunha, Ayda Susana Ortiz-Baez, Caio César de Melo Freire, Paolo Marinho de Andrade Zanotto
Dengue virus (DENV) emerged from the sylvatic environment and colonized urban settings, being sustained in a human-Aedes-human transmission chain, mainly by the bites of females of the anthropophilic species Aedes aegypti. Herein, we sought evidence for fine-tuning in viral codon usage, possibly due to viral adaptation to human transmission. We compared the codon adaptation of DENV serotype 2 (DENV-2) genotypes from urban and sylvatic habitats and tried to correlate the findings with key evolutionary determinants...
May 21, 2018: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/29792968/applicability-of-endochitinase-of-flavobacterium-johnsoniae-with-transglycosylation-activity-in-generating-long-chain-chitooligosaccharides
#3
Papa Rao Vaikuntapu, Mohan Krishna Mallakuntla, Subha Narayan Das, Bhoopal Bhuvanachandra, Bellamkonda Ramakrishna, Sandhya Rani Nadendla, Appa Rao Podile
Chitin and its derivatives are used for a variety of applications. Flavobacterium johnsoniae UW1 is an aerobic Gram-negative bacterium and genome analysis revealed the presence of 10 glycoside hydrolases (GHs) that may degrade or modify chitin. The gene encoding chitinase B (FjchiB), which encodes a single catalytic GH18 domain has been cloned and heterologously expressed in Escherichia coli. FjChiB was optimally active in 50 mM sodium citrate buffer (pH 6.0) at 40 °C. FjChiB was salt-tolerant and catalytically versatile, with substrate specificity towards 75% DDA (degree of de-acetylation) chitosan, followed by colloidal chitin...
May 21, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29792949/srnaome-and-transcriptome-analysis-provide-insight-into-chilling-response-of-cowpea-pods
#4
Jinhua Zuo, Yunxiang Wang, Benzhong Zhu, Yunbo Luo, Qing Wang, Lipu Gao
Cowpea is an important horticultural crop in tropical and subtropical areas of Asia, Africa, and Latin America, as well as parts of southern Europe and Central and South America. Chilling injury is a common physiological hazard of cowpea in cold chain logistics which reduce the cowpea pod's nutritional quality and product value. However, the molecular mechanism involved in chilling injury remains unclear in cowpea pods. RNA-Seq and sRNA-Seq technologies were employed to decipher the miRNAs and mRNAs expression profiles and their regulatory networks in cowpea pods involved in chilling stress...
May 21, 2018: Gene
https://www.readbyqxmd.com/read/29792814/perspectives-of-a-myosin-motor-activator-agent-with-increased-selectivity
#5
Peter Nanasi, Istvan Komaromi, Janos Almassy
Clinical treatment of heart failure is still not fully solved. A novel class of agents, the myosin motor activators, acts directly on cardiac myosin resulting in an increased force generation and prolongation of contraction. Omecamtiv mecarbil, the lead molecule of this group, is now in human 3 phase displaying promising clinical performance. However, omecamtiv mecarbil is not selective to myosin, since it readily binds to and activates cardiac ryanodine receptors (RyR-2), an effect that may cause complications is case of overdose...
May 24, 2018: Canadian Journal of Physiology and Pharmacology
https://www.readbyqxmd.com/read/29792676/dramatic-increase-in-polymer-glass-transition-temperature-under-extreme-nanoconfinement-in-weakly-interacting-nanoparticle-films
#6
Haonan Wang, Jyo Lyn Hor, Yue Zhang, Tianyi Liu, Daeyeon Lee, Zahra Fakhraai
Properties of polymers in polymer nanocomposites and nanopores have been shown to deviate from their respective bulk properties due to chain confinement as well as polymer-particle interfacial interactions. However, separating the confinement effects from the interfacial effects under extreme nanoconfinement is experimentally challenging. Capillary Rise Infiltration (CaRI) enables polymer infiltration into nanoparticle (NP) packings, thereby confining polymers within extremely small pores and dramatically increasing the interfacial area, providing a unique system to systematically distinguish the role of each effect on polymer properties...
May 24, 2018: ACS Nano
https://www.readbyqxmd.com/read/29792034/soft-hydrogel-zwitterionic-coatings-minimize-fibroblast-and-macrophage-adhesion-on-polyimide-substrates
#7
Dusana Trelova, Alice Rita Salgarella, Leonardo Ricotti, Guido Giudetti, Annarita Cutrone, Petra Sramkova, Anna Zahoranova, Dusan Chorvat, Daniel Hasko, Claudio Canale, Silvestro Micera, Juraj Kronek, Arianna Menciassi, Igor Lacik
Minimizing the foreign body reaction to polyimide-based implanted devices has a pivotal role for several biomedical applications. In this work we propose materials exhibiting non-biofouling properties and a Young's modulus reflecting the one of soft human tissues. We describe the synthesis, characterization and in vitro validation of poly(carboxybetaine) hydrogel coatings covalently attached to polyimide substrates via a photolabile 4-azidophenyl group, incorporated in poly(carboxybetaine) chains at two concentrations of 1...
May 24, 2018: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29791880/dietary-cadmium-intake-from-rice-and-vegetables-and-potential-health-risk-a-case-study-in-xiangtan-southern-china
#8
Hongping Chen, Xinping Yang, Peng Wang, Zixuan Wang, Ming Li, Fang-Jie Zhao
Soil contamination in some areas of southern China has resulted in elevated dietary intake of cadmium (Cd), posing a potential risk to human health. A survey of paired soil-rice (n = 200) and soil-vegetable (n = 142) samples was conducted in Xiangtan county of Hunan province, southern China. The concentrations of Cd in all the samples were determined by inductively coupled plasma mass spectrometry. Dietary intakes of Cd from the consumption of locally produced rice and vegetables were estimated for different age groups...
May 20, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29791802/the-power-of-shielding-low-toxicity-and-high-transfection-performance-of-cationic-graft-copolymers-containing-poly-2-oxazoline-side-chains
#9
Anne-Kristin Trützschler, Tanja Bus, Martin Sahn, Anja Traeger, Christine Weber, Ulrich S Schubert
In this study we show the potential of oligo(2-ethyl-2-oxazoline) (OEtOx) shielded graft copolymers of (2 aminoethyl)-methacrylate (AEMA) and N methyl (2-aminoethyl) methacrylate (MAEMA) for pDNA delivery in HEK cells. Copolymers were synthesized via the macromonomer method using a combination of cationic ring opening polymerization (CROP) and reversible addition-fragmentation chain transfer (RAFT) polymerization to vary the degree of grafting (DG = 10% and 30%) as well as the side chain degree of polymerization (DP = 5 and 20)...
May 23, 2018: Biomacromolecules
https://www.readbyqxmd.com/read/29791589/non-invasive-messenger-rna-transcriptional-evaluation-in-human-kidney-allograft-dysfunction
#10
G Joelsons, T Domenico, L F Gonçalves, R C Manfro
The aim of the present study was to evaluate messenger RNA expression in kidney allograft recipients. Forty-four kidney transplant recipients were evaluated up to three months after grafting. After transplantation, peripheral blood samples were drawn sequentially for real-time polymerase chain reaction analyses of perforin and TIM-3 genes. Biopsies were obtained to evaluate acute graft dysfunction and interpreted according to the Banff classification. Eight patients presented episodes of acute rejection. Recipients with rejection had significantly higher levels of TIM-3 mRNA transcripts compared to those without rejection (median gene expression 191...
2018: Brazilian Journal of Medical and Biological Research, Revista Brasileira de Pesquisas Médicas e Biológicas
https://www.readbyqxmd.com/read/29791165/effect-of-polymer-chain-length-on-the-physical-stability-of-amorphous-drug-polymer-blends-at-ambient-pressure
#11
Justyna Pacułt, Marzena Rams-Baron, Beata Chrząszcz, Renata Jachowicz, Marian Paluch
Rational selection of polymers for amorphous drug stabilization is necessary for further successful development of solid dispersion technology. In this paper we investigated the effect of polymer chain length on the inhibition of amorphous drug recrystallization. To consider this problem we prepared a drug-polymer blends (in 10:1 drug to polymer ratio) containing bicalutamide (BIC) and polyvinylpyrrolidone (PVP) with different chain lengths K10, K30, K90. We applied broadband dielectric spectroscopy to compare the molecular dynamics of investigated samples and thoroughly recognize their crystallization tendencies from supercooled liquid state...
May 23, 2018: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/29791070/role-of-oral-examination-in-newly-diagnosed-multiple-myeloma-patients-a-safe-and-simple-way-to-detect-light-chain-amyloidosis
#12
Merav Leiba, Suha Jarjoura, Waseem Abboud, Arnon Nagler, Ran Yahalom, Adrian Duek, Noam Yarom
OBJECTIVE: Up to 30% of multiple myeloma (MM) patients have subclinical amyloid deposits. These patients are under-recognized and are more susceptible to drug toxicity, bleeding and death. Early diagnosis and adjustment of treatment are crucial. Biopsies of oral mucosa might be a potentially useful diagnostic tool. The objective of the present study was to assess the prevalence and characteristics at presentation of oral amyloidosis in a large cohort of MM patients. METHODS: The prevalence and characteristics of oral amyloidosis in a large cohort of MM patients who were referred for oral evaluation before and during bisphosphonate therapy were assessed, retrospectively...
May 23, 2018: Oral Diseases
https://www.readbyqxmd.com/read/29790686/the-expression-of-selected-molecular-markers-of-immune-tolerance-in-psoriatic-patients
#13
Joanna Bartosińska, Joanna Purkot, Małgorzata Kowal, Anna Michalak-Stoma, Dorota Krasowska, Grażyna Chodorowska, Krzysztof Giannopoulos
BACKGROUND: Psoriasis is a chronic autoinflammatory disease whose underlying molecular mechanisms remain unclear. The disease is mediated by the cells and molecules of both the innate and adaptive immune systems. Some T cell surface molecules, including neuropilin-1 (NRP1), programmed death 1 (PD-1) and the human leukocyte antigen G (HLA-G), are known to play a role in the maintenance of immune tolerance. OBJECTIVES: The aim of this study was to investigate HLA-G, NRP1 and programmed cell death gene (PDCD1) mRNA expression in psoriatic patients...
April 24, 2018: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
https://www.readbyqxmd.com/read/29790442/closing-the-delivery-gap
#14
Kevin Peter Fiori, Jennifer Schechter, Sesso Christophe Gbeleou, Sandra Braganza, Joseph Rhatigan, Spero Houndenou, Andrew Lopez, Emily Bensen, Lisa Hirschhorn
Purpose The purpose of this paper is to describe the authors' experience operationalizing the care delivery value chain (CDVC) as a management and continuous quality improvement (QI) approach to strengthen HIV/AIDS services provided in Northern Togo through addressing gaps across a care continuum. Design/methodology/approach The authors led a series of discussions to develop a CDVC specific to existing HIV/AIDS services in Northern Togo. Using the CDVC framework, 28 specific gaps in service delivery were identified and integrated into a strategic QI plan...
May 14, 2018: International Journal of Health Care Quality Assurance
https://www.readbyqxmd.com/read/29790216/decreased-expression-of-hsa_circ_0137287-predicts-aggressive-clinicopathologic-characteristics-in-papillary-thyroid-carcinoma
#15
Xiabin Lan, Jun Cao, Jiajie Xu, Chao Chen, Chuanming Zheng, Jiafeng Wang, Xuhang Zhu, Xin Zhu, Minghua Ge
BACKGROUND: Circular RNA (circRNA) is a new type of noncoding RNA that can serve as ideal biomarkers. Evidence has showed that circRNAs play an important role in carcinogenesis and cancer development. However, little is known about the diagnostic value of circRNAs in papillary thyroid carcinoma (PTC) as well as their associations with clinicopathologic characteristics of patients with PTC. METHODS: The expression levels of hsa_circ_0137287 were detected in 120 PTC and 60 adjacent noncancerous thyroid tissues by quantitative real-time polymerase chain reaction...
May 22, 2018: Journal of Clinical Laboratory Analysis
https://www.readbyqxmd.com/read/29789647/microbial-production-of-novel-sulphated-alkaloids-for-drug-discovery
#16
Eitaro Matsumura, Akira Nakagawa, Yusuke Tomabechi, Shinichi Ikushiro, Toshiyuki Sakaki, Takane Katayama, Kenji Yamamoto, Hidehiko Kumagai, Fumihiko Sato, Hiromichi Minami
Natural products from plants are useful as lead compounds in drug discovery. Plant benzylisoquinoline alkaloids (BIAs) exhibit various pharmaceutical activities. Although unidentified BIAs are expected to be of medicinal value, sufficient quantities of such BIAs, for biological assays, are sometimes difficult to obtain due to their low content in natural sources. Here, we showed that high productivity of BIAs in engineered Escherichia coli could be exploited for drug discovery. First, we improved upon the previous microbial production system producing (S)-reticuline, an important BIA intermediate, to obtain yields of around 160 mg/L, which was 4-fold higher than those of the previously reported highest production system...
May 22, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29788965/diagnostic-tools-of-caprine-and-ovine-anaplasmosis-a-direct-comparative-study
#17
I I Shabana, N M Alhadlag, H Zaraket
BACKGROUND: The diagnosis of anaplasmosis is rather conflicting with other haemoprotozoans. Hence, the study aimed to compare and evaluate the efficiency of competitive ELISA (cELISA), indirect fluorescence antibody (IFA), and Polymerase chain reaction (PCR) for precise diagnosis of Anaplasma spp. and to assess their concordance with microscopic examination (ME). RESULTS: A total of 312 blood samples (189 sheep and 123 goats) were examined for Anaplasma infection during a 1 year period...
May 22, 2018: BMC Veterinary Research
https://www.readbyqxmd.com/read/29788929/resveratrol-induces-autophagy-dependent-apoptosis-in-hl-60-cells
#18
Yingying Fan, Jen-Fu Chiu, Jing Liu, Yan Deng, Cheng Xu, Jun Zhang, Guanwu Li
BACKGROUND: All known mechanisms of apoptosis induced by resveratrol act through cell cycle arrest and changes in mitochondrial membrane potential. It is currently unknown whether resveratrol-induced apoptosis is associated with other physiological processes, such as autophagy. METHODS: Apoptosis-related markers involved in the intrinsic and extrinsic apoptotic pathways, and autophagic markers were detected by using western blotting and immunofluorescence. Mitochondrial membrane potential was assayed by flow cytometry...
May 22, 2018: BMC Cancer
https://www.readbyqxmd.com/read/29788879/phase-behavior-of-polymorphic-fats-in-drug-delivery-systems-a-review-of-the-state-of-art
#19
J R Campos, A R Fernandes, P Severino, M L Garcia, S B Souto, E B Souto
Fats are essential nutrients that have a significant role in the human diet and are essential to provide energy. Fatty acids are present in several types of lipids, such as triglycerides and phospholipids. Fatty acids differ among them, depending on the number of double bonds and on the length of the hydrocarbon chains. If there are no double bonds, the fatty acids are considered saturated and show a linear structure. Compounds with double bonds are unsaturated and have bent structure. The saturated fatty acids are usually solid at room temperature and the unsaturated fatty acids are liquid at that very same temperature...
May 21, 2018: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/29788095/effects-of-maturity-at-harvest-on-the-nutritive-value-and-ruminal-digestion-of-eragrostis-tef-cv-moxie-when-fed-to-beef-cattle
#20
J R Vinyard, J B Hall, J E Sprinkle, G E Chibisa
Teff (Eragrostis tef cv. Moxie), a warm-season annual grass, could be an excellent forage for beef cattle. However, there is limited information on its nutritive value to cattle when harvested at different stages of maturity. Thus, the objective of this research was to determine the effect of feeding teff hay harvested at the boot (BT), early-heading (EH), or late-heading (LH) stages of maturity on nutrient intake, ruminal fermentation characteristics, omasal nutrient flow, and N utilization in beef cattle...
May 18, 2018: Journal of Animal Science
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