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https://www.readbyqxmd.com/read/28418646/the-influence-of-nanostructure-on-the-exciton-dynamics-of-multichromophore-donor-acceptor-block-copolymers
#1
Jianlong Xia, Erik Busby, Samuel N Sanders, Clarion Tung, Angelo Cacciuto, Matthew Y Sfeir, Luis M Campos
We explore the synthesis and photophysics of nanostructured block copolymers that mimic light harvesting complexes. We find that the combination of a polar and electron rich block with a non-polar electron poor block yields a polymer which self-assembles into ordered "nanoworms". Numerical simulations are used to determine optimal compositions to achieve robust self-assembly. Photolumi-nescence spectroscopy is used to probe the rich exciton dynamics in these systems. Using controls, such as homopolymers and random copolymers we analyze the mechanisms of the photoluminescence from these polymers...
April 18, 2017: ACS Nano
https://www.readbyqxmd.com/read/28386601/on-the-mechanism-of-cytoprotection-by-ferrostatin-1-and-liproxstatin-1-and-the-role-of-lipid-peroxidation-in-ferroptotic-cell-death
#2
Omkar Zilka, Ron Shah, Bo Li, José Pedro Friedmann Angeli, Markus Griesser, Marcus Conrad, Derek A Pratt
Ferroptosis is a form of regulated necrosis associated with the iron-dependent accumulation of lipid hydroperoxides that may play a key role in the pathogenesis of degenerative diseases in which lipid peroxidation has been implicated. High-throughput screening efforts have identified ferrostatin-1 (Fer-1) and liproxstatin-1 (Lip-1) as potent inhibitors of ferroptosis - an activity that has been ascribed to their ability to slow the accumulation of lipid hydroperoxides. Herein we demonstrate that this activity likely derives from their reactivity as radical-trapping antioxidants (RTAs) rather than their potency as inhibitors of lipoxygenases...
March 22, 2017: ACS Central Science
https://www.readbyqxmd.com/read/28362472/nutritional-value-and-chemical-composition-of-sudanese-millet-based-fermented-foods-as-affected-by-fermentation-and-method-of-preparation
#3
Abdalbasit A Mariod, Yousif M A Idris, Nuha M Osman, Maha A Mohamed, Awad M A Sukrab, Bertrand Matthaus
BACKGROUND: Although kissra and hulu-mur are well known millet-based foods in Sudan, the effect of fer- mentation and methods of preparation on their chemical compositions has not been thoroughly investigated. The aim of this study was to investigate the method of preparation and the composition of kisra, and hulu-mur. METHODS: The effect of fermentation and method of preparation on the composition, and mi- crobiological load were examined in millet flour during the preparation of Sudanese fermented foods (kisra & hulu-mur)...
January 2017: Acta Scientiarum Polonorum. Technologia Alimentaria
https://www.readbyqxmd.com/read/28356966/stromal-expression-of-fer-suppresses-tumor-progression-in-renal-cell-carcinoma-and-is-a-predictor-of-survival
#4
Kensuke Mitsunari, Yasuyoshi Miyata, Shin-Ichi Watanabe, Akihiro Asai, Takuji Yasuda, Shigeru Kanda, Hideki Sakai
Fps/Fes related (Fer) is a non-receptor tyrosine kinase that is expressed in fibroblasts, immune cells and endothelial cells. Fer serves an important pathological role in cell survival, angiogenesis and the immune system. However, the pathological role of Fer expression in the stromal cells surrounding renal cell carcinoma (RCC) has not been previously investigated. In the present study, immunohistochemical analysis of Fer was performed using the formalin-fixed tissue samples of 152 patients with RCC. The proliferative and apoptotic indices were used to represent the percentage of proliferation marker protein Ki-67- and cleaved caspase-3-positive cells, respectively...
February 2017: Oncology Letters
https://www.readbyqxmd.com/read/28356947/downregulation-of-feline-sarcoma-related-protein-inhibits-cell-migration-invasion-and-epithelial-mesenchymal-transition-via-the-erk-ap-1-pathway-in-bladder-urothelial-cell-carcinoma
#5
Xudong Hu, Zhiqiang Zhang, Zhaofeng Liang, Dongdong Xie, Tao Zhang, Dexin Yu, Caiyun Zhong
Feline sarcoma-related protein (Fer) is a nuclear and cytoplasmic non-receptor protein tyrosine kinase and Fer overexpression is associated with various biological processes. However, the clinicopathological characteristics and molecular mechanisms of Fer expression in bladder urothelial cell carcinoma (UCC) have yet to be elucidated. The present study demonstrated that Fer was significantly upregulated in bladder UCC tissues and cell lines. A clinicopathological analysis suggested that Fer expression was significantly associated with tumor stage, histological grade and lymph node status, and Fer expression was a prognostic factor for overall survival in a multivariate analysis...
February 2017: Oncology Letters
https://www.readbyqxmd.com/read/28339021/determinants-of-serum-manganese-levels-in-an-italian-population
#6
Tommaso Filippini, Bernhard Michalke, Peter Grill, Carlotta Malagoli, Marcella Malavolti, Luciano Vescovi, Sabina Sieri, Vittorio Krogh, Andrea Cherubini, Giuseppe Maffeis, Roberto Lucchini, Margherita Ferrante, Marco Vinceti
Manganese (Mn) is both essential and toxic for humans, mainly depending on the total levels and its species. Main sources of exposure include food and air pollution, particularly motorized traffic. We sought to determine the potential influence of these sources on serum total levels of Mn and Mn species. We selected a random sample of municipality residents from an Italian urban municipality, from whom we collected detailed personal information, dietary habits and a blood sample for serum Mn determination...
March 24, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28333318/a-phase-iii-randomized-controlled-trial-comparing-the-efficacy-safety-and-tolerability-of-oral-dydrogesterone-versus-micronized-vaginal-progesterone-for-luteal-support-in-in-vitro-fertilization
#7
Herman Tournaye, Gennady T Sukhikh, Elke Kahler, Georg Griesinger
STUDY QUESTION: Is oral dydrogesterone 30 mg daily (10 mg three times daily [TID]) non-inferior to micronized vaginal progesterone (MVP) 600 mg daily (200 mg TID) for luteal support in in vitro fertilization (IVF), assessed by the presence of fetal heartbeats determined by transvaginal ultrasound at 12 weeks of gestation? SUMMARY ANSWER: Non-inferiority of oral dydrogesterone versus MVP was demonstrated at 12 weeks of gestation, with a difference in pregnancy rate and an associated confidence interval (CI) that were both within the non-inferiority margin...
May 1, 2017: Human Reproduction
https://www.readbyqxmd.com/read/28333185/randomized-open-trial-comparing-a-modified-double-lumen-needle-follicular-flushing-system-with-a-single-lumen-aspiration-needle-in-ivf-patients-with-poor-ovarian-response
#8
Kyra von Horn, Marion Depenbusch, Askan Schultze-Mosgau, Georg Griesinger
STUDY QUESTION: Is a modified double-lumen aspiration needle system with follicular flushing able to increase the mean oocyte yield by at least one in poor response IVF patients as compared to single-lumen needle aspiration without flushing? SUMMARY ANSWER: Follicular flushing with the modified flushing system did not increase the number of oocytes, but increased the procedure duration. WHAT IS KNOWN ALREADY: Most studies on follicular flushing were performed with conventional double-lumen needles in patients who were normal responders...
April 1, 2017: Human Reproduction
https://www.readbyqxmd.com/read/28302247/symptomatic-fetal-type-cardiac-rhabdomyoma
#9
Seyma Kayali, Vehbi Dogan, Nilüfer Arda, Murat Koç, Ilker Ertugrul, Senem Özgür, Utku Arman Örün, Selmin Karademir
Rhabdomyomas are the most common primary cardiac tumors, especially seen during early periods of childhood. Fetaltype rhabdomyoma is a benign tumor described almost always in extracardiac locations. Although the natural history of the cardiac rhabdomyoma is to regress, the behaviour of the fetal-type rhabdomyomas when present in the heart is unknown with respect to its infrequency. Herein, we report a hemodynamically unstable female neonate with a single large intra-cardiac mass unresponsive to medical treatment, who underwent surgery...
March 2017: Journal of the College of Physicians and Surgeons—Pakistan: JCPSP
https://www.readbyqxmd.com/read/28279978/desmopressin-for-nocturia-in-adults
#10
(no author information available yet)
Desmopressin has been used for many years in the treatment of diabetes insipidus, nocturnal enuresis (involuntary urination while asleep) and nocturia associated with multiple sclerosis (in adults aged up to 65 years); it has also been recommended in certain circumstances for the treatment of nocturia in men and women (previously, an unlicensed use).(1,2) Recently, a new brand of desmopressin sublingual tablet (lyophilisate-an orally disintegrating tablet; Noqdirna-Ferring) has been licensed for use in adults of any age for the treatment of nocturia due to idiopathic nocturnal polyuria...
March 2017: Drug and Therapeutics Bulletin
https://www.readbyqxmd.com/read/28277407/iron-deficiency-and-anemia-among-collegiate-athletes-a-retrospective-chart-review
#11
Rachel B Parks, Scott J Hetzel, M Alison Brooks
PURPOSE: To describe the prevalence of anemia among incoming female college athletes and to characterize the results and expenses of iron-related testing at one NCAA Division I institution. METHODS: In this retrospective medical record review, hemoglobin (Hgb) and ferritin (Fer) lab values were obtained for student-athletes at a single institution, 2002 - 2014. Labs were collected either as part of the pre-participation exam (PPE) for female athletes, routine screening for cross country athletes, or as needed for medical evaluation...
March 8, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28250973/mpp-induces-necrostatin-1-and-ferrostatin-1-sensitive-necrotic-death-of-neuronal-sh-sy5y-cells
#12
Keisuke Ito, Yutaka Eguchi, Yusuke Imagawa, Shuji Akai, Hideki Mochizuki, Yoshihide Tsujimoto
Regulation of cell death is potentially a powerful treatment modality for intractable diseases such as neurodegenerative diseases. Although there have been many reports about the possible involvement of various types of cell death in neurodegenerative diseases, it is still unclear exactly how neurons die in patients with these diseases, thus treatment strategies based on cell death regulation have not been established yet. To obtain some insight into the mechanisms of cell death involved in neurodegenerative diseases, we studied the effect of 1-methyl-4-phenylpyridinium (MPP+) on the human neuroblastoma cell line SH-SY5Y (a widely used model of Parkinson's disease)...
2017: Cell Death Discovery
https://www.readbyqxmd.com/read/28248524/biocompatible-soft-nanoparticles-with-multiple-morphologies-obtained-from-nanoprecipitation-of-amphiphilic-graft-copolymers-in-a-backbone-selective-solvent
#13
Gaëlle Le Fer, Clémence Le Cœur, Jean-Michel Guigner, Catherine Amiel, Gisèle Volet
Stealth nanocarriers are a promising technology for the treatment of diseases. However, the preparation and characterization of well-defined soft nanoparticulate systems remain challenging. Here we describe a platform of amphiphilic graft copolymers leading to nanoparticles with multiple morphologies and the role of the hydrophilic backbone in their interaction with a model protein. The amphiphilic graft copolymers platform was composed of hydrophilic backbone poly(2-methyl-2-oxazoline-co-2-pentyl-2-oxazoline) (P(MeOx-co-PentOx)), prepared via cationic ring-opening polymerization...
March 10, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28245430/man2a1-fer-fusion-gene-is-expressed-by-human-liver-and-other-tumor-types-and-has-oncogenic-activity-in-mice
#14
Zhang-Hui Chen, Yan P Yu, Junyan Tao, Silvia Liu, George Tseng, Michael Nalesnik, Ronald Hamilton, Rohit Bhargava, Joel B Nelson, Arjun Pennathur, Satdarshan P Monga, James D Luketich, George K Michalopoulos, Jian-Hua Luo
BACKGROUND & AIMS: Human tumors and liver cancer cell lines express the product of a fusion between the first 13 exons in the mannosidase α class 2A member 1 gene (MAN2A1) and the last 6 exons in the FER tyrosine kinase gene (FER), called MAN2A1-FER. We investigated whether MAN2A1-FER is expressed by human liver tumors and its role in liver carcinogenesis. METHODS: We performed reverse transcription polymerase chain reaction analyses of 102 non-small cell lung tumors, 61 ovarian tumors, 70 liver tumors, 156 glioblastoma multiform samples, 27 esophageal adenocarcinomas, and 269 prostate cancer samples, as well as 10 nontumor liver tissues and 20 nontumor prostate tissues, collected at the University of Pittsburgh...
February 25, 2017: Gastroenterology
https://www.readbyqxmd.com/read/28244165/study-on-the-catalytic-behavior-of-bifunctional-hydrogen-bonding-catalysts-guided-by-free-energy-relationship-analysis-of-steric-parameters
#15
Chen Yang, Jie Wang, Yang Liu, Xiang Ni, Xin Li, Jin-Pei Cheng
Free energy relationship (FER) studies to correlate steric parameters with the enantiocatalytic performance of bifunctional tertiary-amine hydrogen-bonding catalysts, including (S,S)-cyclohexane-1,2-diamine-derived thioureas, Cinchona alkaloid derived thioureas, and (S,S)-cyclohexane-1,2-diamine-derived squaramides, in Michael reactions revealed that the reactions are much favored by catalysts with less bulky N-substituents. The observed FERs are independent of the chiral scaffold and hydrogen-bond donor, and deepen the understanding of current bifunctional hydrogen-bonding catalysts...
February 28, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28238904/proteomic-toxicological-and-immunogenic-characterization-of-mexican-west-coast-rattlesnake-crotalus-basiliscus-venom-and-its-immunological-relatedness-with-the-venom-of-central-american-rattlesnake-crotalus-simus
#16
Álvaro Segura, María Herrera, Francisco Reta Mares, Claudia Jaime, Andrés Sánchez, Mariángela Vargas, Mauren Villalta, Aarón Gómez, José María Gutiérrez, Guillermo León
The venom of the Mexican west-coast rattlesnake (Crotalus basiliscus) was characterized for its protein composition, toxicological profile and immunogenic properties. This venom is composed of 68% Zn(2+)-dependent metalloproteinases (SVMPs), 14% phospholipases A2 (PLA2s), 11% serine proteinases, 4% SVMPs-inhibitor tripeptides (SVMP-ITs), 2% bradykinin-potentiating peptides (BPPs), 0.6% cysteine-rich secretory proteins (CRISPs), and 0.2% l-amino acid oxidases (LAAOs). SVMPs present in the venom are responsible for azocasein hydrolysis and hemorrhagic activity, but their contribution to the lethal activity of the venom in mice is masked by the neurotoxic activity of PLA2s, which in addition are also responsible for myotoxic activity...
February 24, 2017: Journal of Proteomics
https://www.readbyqxmd.com/read/28238779/daily-activity-rhythms-and-the-stress-related-response-in-the-wedge-sole-dicologoglossa-cuneata-moreau-1881
#17
E De la Roca, B Sánchez, J M López, M A Herves, A Canalejo, M Herrera
To gain further insights on the wedge sole (Dicologoglossa cuneata Moreau, 1881) physiology and behavior, we evaluated its daily feeding and locomotor activity rhythms and compared three different feeding strategies: self-feeding (SF), diurnal feeding schedule (DS) and nocturnal feeding schedule (NS). 450 fish divided into three groups (three replicates each), were kept during 65days. SF had free access to self-feeders whereas DS and NS were fed four times a day. Physiological stress parameters as plasma cortisol, glucose, lactate, proteins and triglycerides were determined...
February 24, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28230288/a-dual-label-time-resolved-fluorescence-immunoassay-for-the-simultaneous-determination-of-ferritin-and-%C3%AE-2-microglobulin
#18
Zhi Liu, Jing Huang, Rui-Ming Ou, Meng-Dong Yao, Yan-Lin She, Rui Chen, Cheng Li, Li Xu, Aikebaier Abudureyimu, Qing Zhang, Shuang Liu
BACKGROUND: Lymphocytic leukemia is a kind of primary malignant tumor of hematopoietic tissue. The aim was to establish a dual-label time-resolved fluorescence immunoassay (TRFIA) for the simultaneous determination of ferritin (FER) and β2 -microglobulin (β2 -MG) for the early screening and follow-up surveillance of lymphocytic leukemia. METHODS: The sandwich immunoassay was used to detect the concentration of FER, and the competitive immunoassay was used to detect the concentration of β2 -MG in serum...
February 23, 2017: Journal of Clinical Laboratory Analysis
https://www.readbyqxmd.com/read/28220679/the-lac-m%C3%A3-gantic-derailment-corporate-regulation-and-neoliberal-sovereignty
#19
David Tyler Dunford
On July 6, 2013, Montreal, Maine, and Atlantic railcar 5017 hauling 72 tanker cars of Bakken crude oil derailed over the town of Lac-Mégantic, Quebec. The town erupted in a fiery inferno as 5,560,000 liters of highly flammable Bakken crude oil exploded over the town, killing 47 people and contaminating 558,000 tons of soil and local waterways. While Montreal, Maine, and Atlantic Rail Chairman Edward Burkhardt initially blamed the derailment on the lone engineer and local firefighters, this study shows how Transport Canada and the rail industry undermined regulatory and safety measures for several years before the derailment...
February 2017: Canadian Review of Sociology, Revue Canadienne de Sociologie
https://www.readbyqxmd.com/read/28188206/carbon-source-dependent-inducible-metabolism-of-veratryl-alcohol-and-ferulic-acid-in-pseudomonas-putida-csv86
#20
Karishma Mohan, Prashant S Phale
Pseudomonas putida CSV86 degrades lignin-derived metabolic intermediates, viz, veratryl alcohol, ferulic acid, vanillin, and vanillic acid, as the sole sources of carbon and energy. Strain CSV86 also degraded lignin sulfonate. Cell respiration, enzyme activity, biotransformation, and high-pressure liquid chromatography (HPLC) analyses suggest that veratryl alcohol and ferulic acid are metabolized to vanillic acid by two distinct carbon source-dependent inducible pathways. Vanillic acid was further metabolized to protocatechuic acid and entered the central carbon pathway via the β-ketoadipate route after ortho ring cleavage...
April 15, 2017: Applied and Environmental Microbiology
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