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https://www.readbyqxmd.com/read/28346881/heparin-and-homogeneous-model-heparin-oligosaccharides-form-distinct-complexes-with-protamine-light-scattering-and-zeta-potential-analysis
#1
Cynthia D Sommers, Hongping Ye, Jian Liu, Robert J Linhardt, David A Keire
Large multimolecular complexes of heparin with positively charged proteins such as platelet factor 4 (PF4) or protamine can initiate immune responses associated with heparin use in patients, including the most significant adverse event, heparin-induced thrombocytopenia (HIT). Current evidence suggests that platelet-activating antibodies that recognize large multi-molecular complexes (300-700kDa) of PF4 bound to heparin cause HIT [1] and in very rare cases anti-protamine-heparin antibodies can induce thrombocytopenia [2]...
March 14, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28346877/stevia-rebaudiana-bertoni-effect-on-the-hemolytic-potential-of-listeria-monocytogenes
#2
S Sansano, A Rivas, M C Pina-Pérez, A Martinez, D Rodrigo
The effect of Stevia rebaudiana Bertoni on the hemolytic potential of Listeria monocytogenes was studied by means of the assessment of the Listeriolysin O (LLO) production. The three factors under study, stevia concentration in the range [0-2.5] % (w/v), incubation temperature (10 and 37°C), and exposure time (0-65h) significantly affected (p≤0.05) the hemolytic activity of L. monocytogenes. Results showed that at the lower incubation temperature the hemolytic potential of the bacterium was significantly reduced, from 100% at 37°C to 8% at 10°C (after 65h of incubation) in unsupplemented substrate (0% stevia)...
March 16, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/28346794/comparative-study-of-xenobiotic-free-media-for-the-cultivation-of-human-limbal-epithelial-stem-progenitor-cells
#3
Sheyla González, Luxia Chen, Sophie X Deng
The culture of human limbal epithelial stem/progenitor cells (LSCs) in the presence of animal components poses the risk of cross-species contamination in clinical applications. We quantitatively compared different xenobiotic-free culture media for the cultivation of human LSCs. LSCs were cultured from 2 × 2 mm limbal tissue explants on denuded human amniotic membrane with different xenobiotic-free culture media: CnT-Prime (CnT-PR) supplemented with 0%, 1%, 5%, and 10% human serum (HS), embryonic stem cell medium (ESCM) alone or in combination with the standard supplemented hormonal epithelium medium (SHEM, control) at a 1:1 dilution ratio, and modified SHEM (mSHEM), in which cholera toxin and dimethyl sulfoxide (DMSO) were removed, isoproterenol was added, and the epidermal growth factor concentration was reduced...
March 24, 2017: Tissue Engineering. Part C, Methods
https://www.readbyqxmd.com/read/28346555/modulation-of-the-cooperativity-in-the-assembly-of-multistranded-supramolecular-polymers
#4
Cristiana Campanella, Elkin Lopez-Fontal, Lilia Milanesi, Salvador Tomas
It is highly desirable that supramolecular polymers self-assemble following small changes in the environment. The degree of responsiveness depends on the degree of cooperativity at play during the assembly. Understanding how to modulate and quantify cooperativity is therefore highly desirable for the study and design of responsive polymers. Here we show that the cooperative assembly of a porphyrin-based, double-stranded polymer is triggered by changes in building blocks and in salt concentration. We develop a model that accounts for this responsiveness by assuming the binding of the salt countercations to the double-stranded polymer...
March 27, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28346545/aqueous-cytokine-levels-are-associated-with-reduced-macular-thickness-after-intravitreal-ranibizumab-for-diabetic-macular-edema
#5
Tomoyasu Shiraya, Satoshi Kato, Fumiyuki Araki, Takashi Ueta, Tempei Miyaji, Takuhiro Yamaguchi
PURPOSE: It is controversial whether the administration of anti-vascular endothelial growth factor drugs for diabetic macular edema (DME) affects intraocular inflammatory cytokines. In this study, we measured cytokine concentration in aqueous humor before and after intravitreal injection of ranibizumab (IVR). The aim was to determine changes in cytokine concentration and their effects on DME reduction. METHODS: Twelve patients (13 eyes) with DME received two IVR (0...
2017: PloS One
https://www.readbyqxmd.com/read/28346510/study-on-the-biodegradation-of-crude-oil-by-free-and-immobilized-bacterial-consortium-in-marine-environment
#6
Qingguo Chen, Jingjing Li, Mei Liu, Huiling Sun, Mutai Bao
Five strains of bacteria, namely, Exiguobacterium sp. ASW-1, Pseudomonas aeruginosa strain ASW-2, Alcaligenes sp. ASW-3, Alcaligenes sp. ASS-1, and Bacillus sp. ASS-2, were isolated from the Zhejiang coast in China. The mixed flora of the five strains performed well with degrading 75.1% crude oil (1%, w/v) in 7 days. The calcium alginate-activated carbon embedding carrier was used to immobilize bacterial consortium. Immobilized cells performed better than free ones in variations of environmental factors containing incubated temperature, initial pH, salinity of the medium and crude oil concentration...
2017: PloS One
https://www.readbyqxmd.com/read/28346505/long-duration-effect-of-multi-factor-stresses-on-the-cellular-biochemistry-oil-yielding-performance-and-morphology-of-nannochloropsis-oculata
#7
Likun Wei, Xuxiong Huang
Microalga Nannochloropsis oculata is a promising alternative feedstock for biodiesel. Elevating its oil-yielding capacity is conducive to cost-saving biodiesel production. However, the regulatory processes of multi-factor collaborative stresses (MFCS) on the oil-yielding performance of N. oculata are unclear. The duration effects of MFCS (high irradiation, nitrogen deficiency and elevated iron supplementation) on N. oculata were investigated in an 18-d batch culture. Despite the reduction in cell division, the biomass concentration increased, resulting from the large accumulation of the carbon/energy-reservoir...
2017: PloS One
https://www.readbyqxmd.com/read/28346390/the-effect-and-mechanism-of-transdermal-penetration-enhancement-of-fu-s-cupping-therapy-new-physical-penetration-technology-for-transdermal-administration-with-traditional-chinese-medicine-tcm-characteristics
#8
Wei-Jie Xie, Yong-Ping Zhang, Jian Xu, Xiao-Bo Sun, Fang-Fang Yang
BACKGROUND: In this paper, a new type of physical penetration technology for transdermal administration with traditional Chinese medicine (TCM) characteristics is presented. Fu's cupping therapy (FCT), was established and studied using in vitro and in vivo experiments and the penetration effect and mechanism of FCT physical penetration technology was preliminarily discussed. METHODS: With 1-(4-chlorobenzoyl)-5-methoxy-2-methylindole-3-ylacetic acid (indomethacin, IM) as a model drug, the establishment of high, medium, and low references was completed for the chemical permeation system via in vitro transdermal tests...
March 27, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28346357/comparison-of-the-in-vivo-biotransformation-of-two-emerging-estrogenic-contaminants-bp2-and-bps-in-zebrafish-embryos-and-adults
#9
Vincent Le Fol, François Brion, Anne Hillenweck, Elisabeth Perdu, Sandrine Bruel, Selim Aït-Aïssa, Jean-Pierre Cravedi, Daniel Zalko
Zebrafish embryo assays are increasingly used in the toxicological assessment of endocrine disruptors. Among other advantages, these models are 3R-compliant and are fit for screening purposes. Biotransformation processes are well-recognized as a critical factor influencing toxic response, but major gaps of knowledge exist regarding the characterization of functional metabolic capacities expressed in zebrafish. Comparative metabolic studies between embryos and adults are even scarcer. Using ³H-labeled chemicals, we examined the fate of two estrogenic emerging contaminants, benzophenone-2 (BP2) and bisphenol S (BPS), in 4-day embryos and adult zebrafish...
March 25, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28346355/characterization-of-active-anthocyanin-degradation-in-the-petals-of-rosa-chinensis-and-brunfelsia-calycina-reveals-the-effect-of-gallated-catechins-on-pigment-maintenance
#10
Honghui Luo, Shuangfan Deng, Wei Fu, Xin Zhang, Xuelian Zhang, Zhaoqi Zhang, Xuequn Pang
Anthocyanin degradation decreases ornamental or nutritional values of horticultural products. To investigate factors that may influence colour change in flower development, anthocyanin degradation was compared between the flowers of Brunfelsia calycina and Rosa chinensis, which show rapid and slow degradation, respectively. In-gel activity assays, high performance liquid chromatography (HPLC) analysis of tannins, enzyme kinetics measurement and immune-detection of anthocyanin degradation related-perioxidases (PODs) were carried out for the comparison...
March 25, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28346354/anti-inflammatory-properties-of-irisin-mediator-of-physical-activity-are-connected-with-tlr4-myd88-signaling-pathway-activation
#11
Agnieszka Irena Mazur-Bialy, Ewa Pocheć, Marcin Zarawski
Irisin, an adipomiokine known as a mediator of physical activity, induces the browning of adipose tissue and it has potentially protective properties in the development of obesity-related states, such as insulin resistance, arteriosclerosis, and type 2 diabetes. Despite numerous studies conducted on this factor, still little is known about its impact on the functioning of immunocompetent cells, but its potential anti-inflammatory properties were previously suggested. In the current study we investigated the role of irisin (0-100 nM) in the downstream pathway activation of Toll-like receptor 4 (TLR4) in RAW 264...
March 25, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28346070/origin-of-disinfection-by-products-in-cheeses
#12
Maria Jose Cardador, Mercedes Gallego, Francisco Prados, José Fernández-Salguero
The disinfection of water, equipment and surfaces in the cheese factory is one of the factors that can originate disinfection by-products (DBPs) in cheeses. This research has focused on studying cheese factories in order to evaluate the individual contribution of each step of the cheese-making process that can contribute to the presence of DBPs in cheeses. Ten factories were selected according to their salting processes (brine salting or dry salting). Each factory was monitored by the collection of six representative samples (factory water supply, brine solution, milk, whey, curd, and cheese) in which the concentrations of up to eight chemicals were detected...
March 27, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/28346059/deferasirox-pharmacogenetic-influence-on-pharmacokinetic-efficacy-and-toxicity-in-a-cohort-of-pediatric-patients
#13
Sarah Allegra, Silvia De Francia, Jessica Cusato, Arianna Arduino, Davide Massano, Filomena Longo, Antonio Piga, Antonio D'Avolio
AIM: We aimed to evaluate the influence of genetic polymorphisms involved in deferasirox metabolism and transport on its pharmacokinetics and treatment toxicity, in a cohort of β-thalassaemic children. PATIENTS & METHODS: Drug plasma concentrations were measured by a HPLC-UV method. Allelic discrimination for UGT1A1, UGT1A3, CYP1A1, CYP1A2, CYP2D6, MRP2 and BCRP1 polymorphisms was performed by real-time PCR. RESULTS: CYP1A1 rs2606345AA influenced Ctrough (p = 0...
March 27, 2017: Pharmacogenomics
https://www.readbyqxmd.com/read/28345991/correlation-between-serum-homocysteine-concentration-and-severity-of-mitral-valve-disease-in-dogs
#14
Chang-Min Lee, Da-Min Jeong, Min-Hee Kang, Seung-Gon Kim, Jae-Ik Han, Hee-Myung Park
OBJECTIVE To measure serum homocysteine concentrations in dogs with myxomatous mitral valve disease (MMVD) and identify any association between this variable and stage of MMVD. ANIMALS 53 client-owned dogs with MMVD and 10 healthy control Beagles. PROCEDURES Dogs with MMVD were allocated to 3 groups in accordance with the staging system for chronic valvular heart disease in dogs and cats of the American College of Veterinary Internal Medicine. Blood samples were collected from all dogs, and serum homocysteine and cardiac troponin 1 concentrations were measured by enzyme immunoassay and chemiluminescence immunoassay, respectively...
April 2017: American Journal of Veterinary Research
https://www.readbyqxmd.com/read/28345968/relationship-between-phospholipase-c-zeta-semen-parameters-and-chromatin-status
#15
Marziyeh Tavalaee, Abbas Kiani-Esfahani, Mohammad H Nasr-Esfahani
The need for additional tests to complement basic sperm analysis in clinics is well appreciated. In this regard, a number of tests such as sperm DNA integrity test as a tool in diagnosis and treatment of infertility are suggested. But recent studies have focused on main sperm factors involved in oocyte activation such as phospholipase C-zeta (PLCζ) that initiate intracellular Ca(2+) signaling and embryogenesis. Therefore, this study aimed to investigate the relationship between PLCζ, basic semen parameters, sperm DNA fragmentation (SDF), and protamine deficiency in men with normal (n=32) and abnormal (n=23) semen parameters...
March 27, 2017: Systems Biology in Reproductive Medicine
https://www.readbyqxmd.com/read/28345963/accumulation-and-speciation-of-cd-in-avicennia-marina-tissues
#16
Li Jian, Yan Chongling, Du Daolin, Lu Haoliang, Liu Jingchun
Avicennia marina is a high Cd tolerant species in the mangrove wetlands. A hydroponic experiment was carried out to research the accumulation and chemical form distribution of Cd in the tissues of A. marina under different concentration and time of Cd stress. It was found that the concentrations of Cd in plant tissues followed the order of root> stem>leaf. The data suggested that root activity decreased, Cd accumulation ability weakened in roots and the Translocation Factor increased in stems and leaves with the increase of stress time...
March 27, 2017: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/28345684/-analysis-of-changes-in-radiographic-lung-image-and-lung-ventilation-disorders-in-workers-occupationally-exposed-to-chrysotile-in-the-past
#17
Elżbieta Cwynar, Beata Świątkowska, Jarosław Tomczyk
BACKGROUND: The adverse health effects of occupational exposure to asbestos dust may occur several years after first exposure. The objective of the study was to assess the relationship between lesions in the respiratory system and the factors contributing to occupational exposure to asbestos described in the first medical examination as well as to analyze the factors responsible for the progression of these changes in further medical tests. MATERIAL AND METHODS: The study group comprised 591 former workers of asbestos processing plant "Gambit" in Lubawka...
March 24, 2017: Medycyna Pracy
https://www.readbyqxmd.com/read/28345549/sub-anesthesia-dose-of-isoflurane-in-60-oxygen-reduces-inflammatory-responses-in-experimental-sepsis-models
#18
Yi Huang, Xiao-Xia Wang, Dong-Dong Sun, Ze-Xin Zhang, Wan-Wan Yang, Tian Shao, Han Han, Er-Fei Zhang, Zhong-Shu Pu, Zuo-Xu Hou, Hai-Long Dong, Li-Ze Xiong, Li-Chao Hou
BACKGROUND: Sepsis is a major cause of mortality in Intensive Care Units. Anesthetic dose isoflurane and 100% oxygen were proved to be beneficial in sepsis; however, their application in septic patients is limited because long-term hyperoxia may induce oxygen toxicity and anesthetic dose isoflurane has potential adverse consequences. This study was scheduled to find the optimal combination of isoflurane and oxygen in protecting experimental sepsis and its mechanisms. METHODS: The effects of combined therapy with isoflurane and oxygen on lung injury and sepsis were determined in animal models of sepsis induced by cecal ligation and puncture (CLP) or intraperitoneal injection of lipopolysaccharide (LPS) or zymosan...
April 5, 2017: Chinese Medical Journal
https://www.readbyqxmd.com/read/28345531/polyphenols-in-preventing-endothelial-dysfunction
#19
Sylwia Biegańska-Hensoldt, Danuta Rosołowska-Huszcz
One of the main causes of mortality in developed countries is atherosclerosis. The pathogenesis of atherosclerosis is associated with endothelial dysfunction. Consumption of food rich in natural antioxidants including polyphenols significantly improves endothelial cells functions. Polyphenols have a beneficial effect on the human body and play an important part in protecting the cardiovascular system. Polyphenols present in food have antioxidant, anti-inflammatory, antihypertensive, antithrombotic and antiproliferative properties...
March 27, 2017: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/28345527/prevalence-and-factors-promoting-the-occurrence-of-vitamin-d-deficiency-in-the-elderly
#20
Magdalena Wyskida, Katarzyna Wieczorowska-Tobis, Jerzy Chudek
Vitamin D deficiency affects a large part of the population of elderly people, especially women, who live in moderate climate countries due to a reduced amount of vitamin D in the diet (small sea fish consumption) and reduced content of 7-dehydrocholesterol, which causes decreased skin synthesis. The lowest seasonal concentration of 25(OH)D3 is usually observed during winter and spring. Sun exposure influences 25(OH)D3 concentration more strongly in men than in women. Sociodemographic factors that increase the risk of vitamin D deficiency in the elderly include poor environmental conditions, low economic status, lower educational level, drug exposure (smoking), reduced physical activity, overall poor health and obesity, which causes reduced skin exposure to sunlight...
March 13, 2017: Postȩpy Higieny i Medycyny Doświadczalnej
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