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https://www.readbyqxmd.com/read/29352739/determination-of-protein-oligomeric-structure-from-small-angle-x-ray-scattering
#1
REVIEW
David A Korasick, John J Tanner
Small-angle X-ray scattering (SAXS) is useful for determining the oligomeric states and quaternary structures of proteins in solution. The average molecular mass in solution can be calculated directly from a single SAXS curve collected on an arbitrary scale from a sample of unknown protein concentration, without the need for beamline calibration or protein standards. The quaternary structure in solution can be deduced by comparing the experimental SAXS curve to theoretical curves calculated from proposed models of the oligomer...
January 20, 2018: Protein Science: a Publication of the Protein Society
https://www.readbyqxmd.com/read/29352727/re-evaluation-of-target-lipid-model-derived-hc5-predictions-for-hydrocarbons
#2
Joy A McGrath, Christopher J Fanelli, Dominic M Di Toro, Thomas F Parkerton, Aaron D Redman, Miriam Leon Paumen, Mike Comber, Charles V Eadsforth, Klaas den Haan
The Target Lipid Model (TLM) has been previously applied to predict the aquatic toxicity of hydrocarbons and other non-ionic organic chemicals and for deriving HC5 values, concentrations above which 95% of species should be protected. Several concerns were identified with the TLM-derived HC5 when applied in a substance risk assessment context. These shortcomings were addressed by expanding the acute and chronic toxicity databases to include more diverse taxonomic groups and increase the number of species. The TLM was recalibrated with these expanded databases resulting in critical target lipid body burdens and acute-to-chronic ratios that met the required guidelines for using species sensitivity distributions in substance risk assessment...
January 20, 2018: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/29352699/computed-tomography-ct-assessment-of-the-membranous-septal-anatomy-prior-to-transcatheter-aortic-valve-replacement-tavr-with-the-balloon-expandable-sapien-3-valve
#3
Brett A Oestreich, Mackenzie Mbai, Sergey Gurevich, Prabhjot S Nijjar, Selcuk Adabag, Stefan Bertog, Rosemary Kelly, Santiago Garcia
OBJECTIVES: The lower limit of the membranous septum (MS) is considered an anatomic landmark for the emergence of the Bundle of His into the left ventricle. Computed tomography (CT) assessment of MS anatomy may provide useful information about the risk of conduction abnormalities following transcatheter aortic valve replacement (TAVR). METHODS AND RESULTS: The study included 102 consecutive patients undergoing TAVR with the Edwards Sapien 3 (S3) valve. Using pre-TAVR CT and post-procedure angiography we evaluated for the presence of calcium in the left ventricular outflow tract (LVOT), calcium depth (CD), implantation depth (ID) and MS length...
December 27, 2017: Cardiovascular Revascularization Medicine: Including Molecular Interventions
https://www.readbyqxmd.com/read/29352693/the-association-between-estimated-glomerular-filtration-rate-albuminuria-and-risk-of-cardiovascular-hospitalizations-and-all-cause-mortality-among-patients-with-type-2-diabetes
#4
Gregory A Nichols, Anouk Déruaz-Luyet, Sibylle J Hauske, Kimberly G Brodovicz
AIMS: We evaluated the simultaneous effects of all clinically recognized categories of albuminuria and estimated glomerular filtration rate (eGFR) on cardiovascular disease (CVD) and mortality. METHODS: We conducted a longitudinal observational study of 16,678 type 2 diabetes (T2D) patients. From the first serum creatinine value from 2006 to 2012 and a urine-albumin creatinine ratio (UACR) recorded within 6months, we applied baseline Kidney Disease: Improving Global Outcomes (KDIGO) categories of eGFR and albuminuria...
December 18, 2017: Journal of Diabetes and its Complications
https://www.readbyqxmd.com/read/29352692/ckd-epi-versus-cockcroft-gault-formula-for-predicting-contrast-induced-nephropathy-following-percutaneous-coronary-intervention-in-patients-without-significant-renal-impairment
#5
Mário B G Nunes, Antônio C Filho, Valéria R C Alvares, Rafael Moreno, Edgar Lamas, Vitor Loures, Daniel Chamié, Alexandre Abizaid
INTRODUCTION: Individuals with glomerular filtration rate (GFR) ≥60 ml/min/1.73 m2 estimated by the Cockcroft-Gault formula (CG) who undergo percutaneous coronary intervention (PCI) frequently develop contrast-induced nephropathy (CIN). This study aimed to assess whether individuals with significant renal impairment assessed by the Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) formula, but not by CG, more often develop CIN following PCI than those without renal impairment by either formula...
January 15, 2018: Portuguese Journal of Cardiology: An Official Journal of the Portuguese Society of Cardiology
https://www.readbyqxmd.com/read/29352649/optimal-use-of-peri-operative-human-chorionic-gonadotrophin-concentrations-to-identify-persistent-ectopic-pregnancy-after-laparoscopic-salpingostomy-a-retrospective-cohort-study
#6
Abraham N Morse, Wenyue Si, Shuang Qin, Huiying Liang
The aim of this study was to improve clinical decision-making for the identification of persistent ectopic pregnancy after linear salpingostomy. The study identified 854 laparoscopic salpingostomies performed between 2011 and 2016; 794 had a human chorionic gonadotrophin (HCG) <10 mIU/ml documented in the electronic medical record within 1 month after surgery ('successes'). Sixty (7%) received either methotrexate or repeat surgery for persistent ectopic pregnancy ('failures'). Five hundred and seventeen, including 46 'failures', had two or more immediate post-operative HCG measurements available...
December 28, 2017: Reproductive Biomedicine Online
https://www.readbyqxmd.com/read/29352626/differences-between-sexes-in-the-standard-and-advanced-dimensioning-of-lateral-meniscal-allografts
#7
Patrycja Mickiewicz, Michał Walczak, Michał Łaszczyca, Damian Kusz, Zygmunt Wróbel
BACKGROUND: There are many different methods of meniscal allograft measurements, which depend on individual tissue bank procedures. Due to the lack of a standardised method of dimensioning, measurement results may vary between individual cases. Consequently, allograft may be mismatched to the patient's knee anatomy. The purpose of this study was to measure four meniscal dimensions - two standard and two specific - and then compare them between sexes. METHODS: Fourteen cadaveric lateral menisci (seven male and seven female) were scanned using a microtomography scanner...
January 15, 2018: Knee
https://www.readbyqxmd.com/read/29352619/quantitative-evaluation-of-enzyme-induced-porcine-articular-cartilage-degeneration-based-on-observation-of-entire-cartilage-layer-using-ultrasound
#8
Jingchen Zhang, Liying Xiao, Lingying Tong, Chao Wan, Zhixiu Hao
Enzyme-induced articular cartilage degeneration resembling osteoarthritis was evaluated using a newly defined acoustic parameter, the "averaged magnitude ratio" (AMR), which has been suggested as an indicator of articular cartilage degeneration. In vitro experiments were conducted on porcine cartilage samples digested with trypsin for 2 h (n = 10) and 4 h (n = 13) and healthy control samples (n = 13). AMR was determined with 15- and 25-MHz ultrasound, and the integrated reflection coefficient (IRC) and apparent integrated backscattering coefficient (AIB) were also calculated for comparison...
January 15, 2018: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29352524/effects-of-physical-activity-and-sedentary-behavior-on-brain-response-to-high-calorie-food-cues-in-young-adults
#9
Shan Luo, Sydney G O'Connor, Britni R Belcher, Kathleen A Page
OBJECTIVE: Physical activity (PA) promotes weight maintenance, potentially because of its beneficial effects on feeding behavior regulation via diminished food cue reactivity within brain reward regions. This study examined how levels of PA and sedentary behavior (SB) relate to brain responses to food cues. METHODS: Participants (22 lean, 18 with obesity) completed three to five PA recalls over 2 months. Average minutes per day of moderate to vigorous PA (MVPA) and SB were calculated...
January 19, 2018: Obesity
https://www.readbyqxmd.com/read/29352477/benzodiazepines-for-antipsychotic-induced-tardive-dyskinesia
#10
REVIEW
Hanna Bergman, Paranthaman S Bhoopathi, Karla Soares-Weiser
BACKGROUND: Tardive dyskinesia (TD) is a disfiguring movement disorder, often of the orofacial region, frequently caused by using antipsychotic drugs. A wide range of strategies have been used to help manage TD, and for those who are unable to have their antipsychotic medication stopped or substantially changed, the benzodiazepine group of drugs have been suggested as a useful adjunctive treatment. However, benzodiazepines are very addictive. OBJECTIVES: To determine the effects of benzodiazepines for antipsychotic-induced tardive dyskinesia in people with schizophrenia, schizoaffective disorder, or other chronic mental illnesses...
January 20, 2018: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/29352474/pharmacokinetics-of-single-dose-sildenafil-administered-orally-in-clinically-healthy-dogs-effect-of-feeding-and-dose-proportionality
#11
R Akabane, T Sato, A Sakatani, Y Miyagawa, H Tazaki, N Takemura
Basic information related to the pharmacokinetics of sildenafil in dogs is scarce. This study aimed to describe the pharmacokinetic properties of oral sildenafil and determine the effect of feeding and dose proportionality. The effect of feeding on pharmacokinetics of sildenafil (1 mg/kg) was investigated using a crossover study with six dogs. In addition, the dose proportionality of sildenafil ranging 1-4 mg/kg was evaluated using five dogs in the fasted states. The plasma concentrations of sildenafil were determined using high-performance liquid chromatography, and pharmacokinetic parameters were calculated using a noncompartmental analysis...
January 19, 2018: Journal of Veterinary Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/29352440/the-limitations-of-standard-clinicopathologic-features-to-accurately-risk-stratify-prognosis-after-resection-of-intrahepatic-cholangiocarcinoma
#12
Fabio Bagante, Katiuscha Merath, Malcolm H Squires, Matthew Weiss, Sorin Alexandrescu, Hugo P Marques, Luca Aldrighetti, Shishir K Maithel, Carlo Pulitano, Todd W Bauer, Feng Shen, George A Poultsides, Olivier Soubrane, Guillaume Martel, B Groot Koerkamp, Alfredo Guglielmi, Endo Itaru, Timothy M Pawlik
BACKGROUND: The ability to provide accurate prognostic data after hepatectomy for intrahepatic cholangiocarcinoma (ICC) remains poor. We sought to develop and validate a nomogram to predict survival, as well as investigate the clinical implications of underestimating patients' risk of recurrence. METHODS: Patients undergoing curative-intent resection of ICC between 1990 and 2015 at 14 major hepatobiliary centers were included. Variables significant on multivariable analysis were used to construct a nomogram to predict disease-free survival (DFS)...
January 19, 2018: Journal of Gastrointestinal Surgery: Official Journal of the Society for Surgery of the Alimentary Tract
https://www.readbyqxmd.com/read/29352435/outcome-of-hip-and-knee-periprosthetic-joint-infections-caused-by-pathogens-resistant-to-biofilm-active-antibiotics-results-from-a-prospective-cohort-study
#13
Doruk Akgün, Carsten Perka, Andrej Trampuz, Nora Renz
BACKGROUND: Periprosthetic joint infections (PJI) caused by pathogens, for which no biofilm-active antibiotics are available, are often referred to as difficult-to-treat (DTT). However, it is unclear whether the outcome of DTT PJI is worse than those of non-DTT PJI. We evaluated the outcome of DTT and non-DTT PJI in a prospective cohort treated with a two-stage exchange according to a standardized algorithm. METHODS: Patients with hip and knee PJI from 2013 to 2015 were prospectively included and followed up for ≥ 2 years...
January 19, 2018: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/29352432/effect-of-membrane-composition-on-receptor-association-implications-of-cancer-lipidomics-on-erbb-receptors
#14
REVIEW
Aiswarya B Pawar, Durba Sengupta
The association of single transmembrane receptors, such as the ErbB receptors is a key event in initiating cell signaling networks. The interactions between these receptors have been well characterized for both ligand-driven and pre-formed dimers. However, the role of the membrane in modulating association is less well understood and assumes greater importance in light of altered membrane composition in diseased states. Here, we discuss how membrane composition has been observed to induce both structural and dynamic differences in receptor association...
January 19, 2018: Journal of Membrane Biology
https://www.readbyqxmd.com/read/29352429/deciphering-the-environmental-impacts-on-rice-quality-for-different-rice-cultivated-areas
#15
Xiukun Li, Lian Wu, Xin Geng, Xiuhong Xia, Xuhong Wang, Zhengjin Xu, Quan Xu
BACKGROUND: Rice (Oryza sativa L.) is cultivated in a wide range of climatic conditions, and is one of mankind's major staple foods. The interaction of environmental factors with genotype effects major agronomic traits such as yield, quality, and resistance in rice. However, studies on the environmental factors affecting agronomic traits are often difficult to conduct because most environmental factors are dynamic and constantly changing. RESULTS: A series of recombinant inbred lines (RILs) derived from an indica/japonica cross were planted into four typical rice cultivated areas arranging from latitude N22° to N42°...
January 19, 2018: Rice
https://www.readbyqxmd.com/read/29352424/cannabinoid-cb1-and-cb2%C3%A2-receptors-and-monoacylglycerol-lipase-gene-expression-alterations-in-the-basal-ganglia-of-patients-with-parkinson-s-disease
#16
Francisco Navarrete, M Salud García-Gutiérrez, Auxiliadora Aracil-Fernández, José L Lanciego, Jorge Manzanares
Previous studies suggest that the endocannabinoid system plays an important role in the neuropathological basis of Parkinson's disease (PD). This study was designed to detect potential alterations in the cannabinoid receptors CB1 (CB1r) and CB2 (A isoform, CB2Ar), and in monoacylglycerol lipase (MAGL) gene expression in the substantia nigra (SN) and putamen (PUT) of patients with PD. Immunohistochemical studies were performed to identify precise CB2r cellular localization in the SN of control and PD patients...
January 19, 2018: Neurotherapeutics: the Journal of the American Society for Experimental NeuroTherapeutics
https://www.readbyqxmd.com/read/29352382/hibernation-of-masses-suspected-to-be-remnant-tumors-after-surgical-resection-of-retroperitoneal-liposarcoma-is-related-to-improved-overall-survival
#17
Jinsoo Rhu, Kyo Won Lee, Jae Berm Park, Sung Joo Kim
BACKGROUND: Although complete surgical resection is considered the best treatment for retroperitoneal liposarcoma, it is related to a high local recurrence rate. This study analyzed patterns of recurrence of retroperitoneal liposarcoma. METHODS: Records of patients who experienced recurrence after surgery for retroperitoneal liposarcoma from January 2000 to May 2017 were analyzed. Site, number, and characteristics of recurrent mass on computed tomography were serially collected...
January 19, 2018: International Journal of Clinical Oncology
https://www.readbyqxmd.com/read/29352352/morphology-structure-and-optical-properties-of-semiconductor-films-with-gesisn-nanoislands-and-strained-layers
#18
Vyacheslav Timofeev, Alexandr Nikiforov, Artur Tuktamyshev, Vladimir Mashanov, Michail Yesin, Aleksey Bloshkin
The dependences of the two-dimensional to three-dimensional growth (2D-3D) critical transition thickness on the composition for GeSiSn films with a fixed Ge content and Sn content from 0 to 16% at the growth temperature of 150 °С have been obtained. The phase diagrams of the superstructure change during the epitaxial growth of Sn on Si and on Ge(100) have been built. Using the phase diagram data, it becomes possible to identify the Sn cover on the Si surface and to control the Sn segregation on the superstructure observed on the reflection high-energy electron diffraction (RHEED) pattern...
January 19, 2018: Nanoscale Research Letters
https://www.readbyqxmd.com/read/29352311/decreased-%C3%AE-cell-mass-and-early-structural-alterations-of-the-exocrine-pancreas-in-patients-with-type-1-diabetes-an-analysis-based-on-the-npod-repository
#19
Fidéline Bonnet-Serrano, Marc Diedisheim, Roberto Mallone, Etienne Larger
BACKGROUND AND AIMS: Abnormal glucagon secretion and functional alterations of the exocrine pancreas have been described in patients with type 1 diabetes (T1D), but their respective anatomical substrata have seldom been investigated. Our aim was to develop an automated morphometric analysis process to characterize the anatomy of α-cell and exocrine pancreas in patients with T1D, using the publicly available slides of the Network for Pancreatic Organ Donors (nPOD). MATERIALS AND METHODS: The ratio of β- and α-cell area to total tissue area were quantified in 75 patients with T1D (thereafter patients) and 66 control subjects (thereafter controls), on 2 insulin-stained and 4 glucagon-stained slides from both the head and the tail of the pancreas...
2018: PloS One
https://www.readbyqxmd.com/read/29352306/prognostic-and-predictive-role-of-egfr-pathway-alterations-in-biliary-cancer-patients-treated-with-chemotherapy-and-anti-egfr
#20
Caterina Peraldo-Neia, Giuliana Cavalloni, Elisabetta Fenocchio, Celeste Cagnazzo, Loretta Gammaitoni, Stefano Cereda, Guglielmo Nasti, Maria Antonietta Satolli, Giuseppe Aprile, Michele Reni, Antonio Avallone, Rosella Spadi, Tiziana Venesio, Vittoria Martin, Claudio Doglioni, Milo Frattini, Massimo Aglietta, Francesco Leone
The association of anti-EGFR to gemcitabine and oxaliplatin (GEMOX) chemotherapy did not improve survival in biliary tract carcinoma (BTC) patients. Multiple mechanisms might be involved in the resistance to anti-EGFR. Here, we explored the mutation profile of EGFR extracellular domain (ECD), of tyrosine kinase domain (TKD), and its amplification status. EGFR mutational status of exons 12, 18-21 was analyzed in 57 tumors by Sanger sequencing. EGFR amplification was evaluated in 37 tumors by Fluorescent In Situ Hybridization (FISH)...
2018: PloS One
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