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https://www.readbyqxmd.com/read/29458202/validity-of-the-intra-operative-measurement-of-stem-anteversion-and-factors-for-the-erroneous-estimation-in-cementless-total-hip-arthroplasty-using-postero-lateral-approach
#1
Y K Lee, J W Kim, T Y Kim, Y C Ha, K H Koo
BACKGROUND: Intra-operative estimation of stem anteversion in total hip arthroplasty (THA) using postero-lateral approach is made by the surgeon's visual assessment, using the tibia as a guide, with the assumption that tibial axis is vertical to the trans-epicondylar axis. However, the accuracy of the intra-operative estimation has rarely been verified with postoperative CT-scans, with controversies regarding these measurements particularly in case of knee osteoarthritis. Therefore we performed a prospective study to: 1) determine the accuracy of the intra-operative measurement and 2) investigate factors affecting the discrepancy between the surgeon's estimation and the real stem anteversion HYPOTHESIS: Intra-operative estimation of stem anteversion correlated with the real stem anteversion on CT scan...
February 16, 2018: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/29458201/computer-assisted-surgery-in-acetabular-fractures-virtual-reduction-of-acetabular-fracture-using-the-first-patient-specific-biomechanical-model-simulator
#2
M Boudissa, H Oliveri, M Chabanas, J Tonetti
Preoperative planning for the management of acetabular fracture is founded on geometric models allowing virtual repositioning of the bone fragments, but not taking account of soft tissue and the realities of the surgical procedure. The present technical note reports results using the first simulator to be based on a patient-specific biomechanical model, simulating the action of forces on the fragments and also the interactions between soft issue and bone: muscles, capsules, ligaments, and bone contacts. In all 14 cases, biomechanical simulation faithfully reproduced the intraoperative behavior of the various bone fragments and reduction quality...
February 16, 2018: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/29458196/within-subject-associations-between-inflammation-and-features-of-depression-using-the-flu-vaccine-as-a-mild-inflammatory-stimulus
#3
Kate R Kuhlman, Theodore F Robles, Larissa N Dooley, Chloe C Boyle, Marcie D Haydon, Julienne E Bower
BACKGROUND: Inflammation plays a role in mood and behavior that may be relevant to identifying risk factors and treatment for depression and other stress-related illnesses. The purpose of this study was to examine whether fluctuations in inflammation following a mild immune stimulus were associated with changes in daily reported features of depression for up to a week in a healthy sample of young adults. METHODS: Forty one undergraduate students completed daily diaries of mood, feelings of social disconnection, sleep, and physical symptoms for one week before and after receiving the seasonal influenza vaccine...
February 16, 2018: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/29458172/modelling-human-myoblasts-survival-upon-xenotransplantation-into-immunodeficient-mouse-muscle
#4
Christophe Praud, Karine Vauchez, Pascal Zongo, Jean-Thomas Vilquin
Cell transplantation has been challenged in several clinical indications of genetic or acquired muscular diseases, but therapeutic success were mitigated. To understand and improve the yields of tissue regeneration, we aimed at modelling the fate of CD56-positive human myoblasts after transplantation. Using immunodeficient severe combined immunodeficiency (SCID) mice as recipients, we assessed the survival, integration and satellite cell niche occupancy of human myoblasts by a triple immunohistochemical labelling of laminin, dystrophin and human lamin A/C...
February 16, 2018: Experimental Cell Research
https://www.readbyqxmd.com/read/29458155/determining-risk-of-colorectal-cancer-and-starting-age-of-screening-based-on-lifestyle-environmental-and-genetic-factors
#5
Jihyoun Jeon, Mengmeng Du, Robert E Schoen, Michael Hoffmeister, Polly A Newcomb, Sonja I Berndt, Bette Caan, Peter T Campbell, Andrew T Chan, Jenny Chang-Claude, Graham G Giles, Jian Gong, Tabitha A Harrison, Jeroen R Huyghe, Eric J Jacobs, Li Li, Yi Lin, Loïc Le Marchand, John D Potter, Flora Qu, Stephanie A Bien, Niha Zubair, Robert J Macinnis, Daniel D Buchanan, John L Hopper, Yin Cao, Reiko Nishihara, Gad Rennert, Martha L Slattery, Duncan C Thomas, Michael O Woods, Ross L Prentice, Stephen B Gruber, Yingye Zheng, Hermann Brenner, Richard B Hayes, Emily White, Ulrike Peters, Li Hsu
BACKGROUND & AIMS: Guidelines for initiating colorectal cancer (CRC) screening are based on family history but do not consider lifestyle, environmental, or genetic risk factors. We developed models to determine risk of CRC, based on lifestyle and environmental factors and genetic variants, and to identify an optimal age to begin screening. METHODS: We collected data from 9748 CRC cases and 10,590 controls in the Genetics and Epidemiology of Colorectal Cancer Consortium and the Colorectal Transdisciplinary study, from 1992 through 2005...
February 16, 2018: Gastroenterology
https://www.readbyqxmd.com/read/29458147/sessein-and-isosessein-with-anti-inflammatory-antibacterial-and-antioxidant-activity-isolated-from-salvia-sessei-benth
#6
Abraham Gómez-Rivera, Manasés González-Cortazar, Maribel Herrera-Ruíz, Alejandro Zamilpa, Verónica Rodríguez-López
ETHNOPHARMACOLOGICAL RELEVANCE: Salvia sessei Benth, popularly known as "pipilolxochitl" or "sabanito", is a plant utilized in Mexico in traditional medicine for the treatment of erysipela. To date, only one report, to our knowledge, has been found in which a royleanone-type diterpene of the aerial parts of the species was isolated but, again to our knowledge, studies have not been conducted on the pharmacological activity of extracts and compounds isolated from this plant...
February 16, 2018: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/29458114/severity-dependent-influence-of-isocapnic-hypoxia-on-reaction-time-is-independent-of-neurovascular-coupling
#7
Hannah G Caldwell, Geoff B Coombs, Michael M Tymko, Daniela Nowak-Flück, Philip N Ainslie
With exposure to acute normobaric hypoxia, global cerebral oxygen delivery is maintained via increases in cerebral blood flow (CBF); therefore, regional and localized changes in oxygen tension may explain neurocognitive impairment. Neurovascular coupling (NVC) is the close temporal and regional relationship of CBF to changes in neural activity and may aid in explaining the localized CBF response with cognitive activation. High-altitude related cognitive impairment is likely affected by hypocapnic cerebral vasoconstriction that may influence regional CBF regulation independent of hypoxia...
February 16, 2018: Physiology & Behavior
https://www.readbyqxmd.com/read/29458095/rapid-loop-mediated-isothermal-amplification-detection-of-coeliac-disease-risk-alleles
#8
Michael Erlichster, Jason A Tye-Din, Michael D Varney, Efstratios Skafidas, Patrick Kwan
Human leukocyte antigen (HLA) genotyping has become a useful investigation in the diagnostic work-up of coeliac disease (CD), with utility in risk stratification and screening. However, broad application of this technology has been hindered by the cost and time burden of conventional laboratory-based assays. We have developed and validated CD-loop-mediated isothermal amplification (CD-LAMP), a LAMP assay, which enables rapid identification of the signature CD risk genotypes, HLA-DQ2.5, HLA-DQ8, HLA-DQ2.2, and HLA-DQA1*05...
February 16, 2018: Journal of Molecular Diagnostics: JMD
https://www.readbyqxmd.com/read/29458073/establishment-and-validation-of-a-prediction-model-for-ischemic-stroke-risks-in-patients-with-type-2-diabetes
#9
Tsai-Chung Li, Hsiang-Chi Wang, Chia-Ing Li, Chiu-Shong Liu, Wen-Yuan Lin, Chih-Hsueh Lin, Sing-Yu Yang, Cheng-Chieh Lin
AIMS: A risk scoring system for predicting ischemic stroke incidence may identify type 2 diabetes patients at high risk for ischemic stroke who can benefit from preventive intervention programs. Such a risk scoring system can serve as a benchmark to test novel putative risk factors. METHODS: The study adopted a retrospective cohort, including 28,124 Chinese patients with type 2 diabetes aged 30-84 years during 2001-2004. Participants were randomly assigned to the derivation and validation sets at a 2:1 ratio...
February 16, 2018: Diabetes Research and Clinical Practice
https://www.readbyqxmd.com/read/29458066/volitional-voiding-of-the-bladder-following-spinal-cord-injury-validation-of-bilateral-lower-extremity-motor-function-as-a-key-predictor
#10
Christopher S Elliott, Kai B Dallas, Dimitar Zlatev, Craig V Comiter, James Crew, Kazuko Shem
INTRODUCTION: For many with spinal cord injury (SCI), a return of volitional bladder voiding is considered more important than regaining motor function. Recently a predictive model using only composite bilateral lower extremity motor (LEM) scores for levels L2-S1 (range 0-50) was put forth by the European Multicenter Spinal Cord Injury (EMSCI) study group that showed exceptional predictive power with an area under the curve (AUC) of 0.912. We sought to further validate the EMSCI model using a national SCI cohort...
February 16, 2018: Journal of Urology
https://www.readbyqxmd.com/read/29458050/investigation-of-metabolic-stability-of-the-novel-alk-inhibitor-brigatinib-by-liquid-chromatography-tandem-mass-spectrometry
#11
Hany W Darwish, Adnan A Kadi, Mohamed W Attwa, Halah S Almutairi
Brigatinib (BGB) belongs to a class of drugs called ALK inhibitor. On April 28, 2017, BGB has been approved by U.S. FDA for use in metastatic ALK-positive NSCLC. A fast, specific, sensitive and validated LC-MS/MS method was developed for the quantification of BGB in human plasma matrix. This method was applied successfully to study metabolic stability of BGB. Reversed phase (C18 column) and isocratic binary mobile phase (55% 0.1% formic acid: 45% ACN) were used for chromatographic separation of BGB and ponatinib (IS)...
February 16, 2018: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/29458034/fluorescence-linked-immunosorbent-assay-for-detection-of-phenanthrene-and-its-homolog
#12
Yu Sun, Yansong Li, Xingyu Meng, Bin Qiao, Pan Hu, Xianmei Meng, Shiying Lu, Honglin Ren, Zengshan Liu, Yu Zhou
A competitive fluorescence-linked immunosorbent assay (FLISA) was developed using rhodamine B isothiocyanate (RBITC) as the model fluorescent dye conjugate monoclonal antibody (McAb) for detection of Phe and its homolog (acenaphthene, fluorene, fluoranthene, pyrene and indeno [1,2,3-cd] pyrene) in water samples. The detection range of the assay for Phe was from 2.10 to 91.95 ng/mL. The limit of detection was 1.05 ng/mL, which was approximately 2-fold lower than that of traditional ic-ELISA. Compared with traditional ic-ELISA, more than 70 min was saved because of only one immunoreaction step was needed to accomplish the assay...
February 16, 2018: Analytical Biochemistry
https://www.readbyqxmd.com/read/29458028/are-portable-stereophotogrammetric-devices-reliable-in-facial-imaging-a-validation-study-of-vectra-h1-device
#13
Daniele Gibelli, Valentina Pucciarelli, Annalisa Cappella, Claudia Dolci, Chiarella Sforza
PURPOSE: Modern 3-dimensional (3D) image acquisition systems represent a crucial technologic development in facial anatomy because of their accuracy and precision. The recently introduced portable devices can improve facial databases by increasing the number of applications. In the present study, the VECTRA H1 portable stereophotogrammetric device was validated to verify its applicability to 3D facial analysis. MATERIALS AND METHODS: Fifty volunteers underwent 4 facial scans using portable VECTRA H1 and static VECTRA M3 devices (2 for each instrument)...
January 31, 2018: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29457995/validation-of-a-brazilian-portuguese-version-of-the-transition-readiness-assessment-questionnaire-traq-in-a-population-of-transitional-youth-with-chronic-rheumatologic-disorders
#14
Catherine G Anelli, Claudio A Len, Maria T Terreri, Gleice C S Russo, Andreas O Reiff
OBJECTIVE: To translate and validate the Brazilian Portuguese version of the Transition Readiness Assessment Questionnaire in a population of adolescents and young adults with chronic rheumatologic disorders. This questionnaire evaluates the patient's readiness for making the transition from the pediatric health service to adult care. METHODS: The four-phase methodology for the translation and validation of generic questionnaires was followed, including translation, back-translation, pilot testing and clinical validation of the final tool...
February 16, 2018: Jornal de Pediatria
https://www.readbyqxmd.com/read/29457931/synthesis-and-characterization-of-nanodiamond-growth-factor-complexes-towards-applications-in-oral-implantation-and-regenerative-medicine
#15
Julie Bang, Caleb Ting, Peter Wang, Ted Kim, Kenneth Wang, Theodore Kee, Darron Miya, Dean Ho, Dong-Keun Lee
Current challenges in the field of regenerative medicine include the need to deliver sustained concentrations of growth factors and genes that are required to induce the repair of deficient tissues. Enhancement of drug delivery and uptake may result in improved growth factor efficacy. Nanodiamonds (NDs) were explored as potential growth factor delivery agents due to the many favorable properties that they possess. For example, ND's biocompatibility has been extensively validated pre-clinically. In addition, they can be scalably produced through impact events such as detonation...
February 19, 2018: Journal of Oral Implantology
https://www.readbyqxmd.com/read/29457890/headspace-solid-phase-microextraction-coupled-to-miniaturized-microplasma-optical-emission-spectrometry-for-detection-of-mercury-and-lead
#16
Chengbin Zheng, Ligang Hu, Xiandeng Hou, Bin He, Guibin Jiang
Despite increased interest in microplasma atomic spectrometry over the past several years, its applications to field analysis of real samples still remain limited due to its low sensitivity. In this work, headspace solid-phase microextraction (HS-SPME) using PDMS/DVB fiber was used as a sample introduction method to improve the sensitivity of a miniature (6.0 cm length × 5.0 cm width × 2.8 cm height) low power (<10 W) microplasma point discharge optical emission spectrometer (PD-OES) for the determination of Hg and Pb after their derivatization with sodium tetraethylborate (NaBEt4)...
February 19, 2018: Analytical Chemistry
https://www.readbyqxmd.com/read/29457883/mapping-the-h-nox-hk-binding-interface-in-vibrio-cholerae-by-hydrogen-deuterium-exchange-mass-spectrometry
#17
Yirui Guo, Anthony T Iavarone, Matthew M Cooper, Michael A Marletta
Heme-nitric oxide/oxygen binding (H-NOX) proteins are a group of hemoproteins that bind diatomic gas ligands such as nitric oxide (NO) and oxygen (O2 ). H-NOX proteins typically regulate histidine kinases (HK) located within the same operon. It has been reported that NO-bound H-NOXs inhibit cognate histidine kinase autophosphorylation in bacterial H-NOX/HK complexes, however, a detailed mechanism of NO-mediated regulation of the H-NOX/HK activity remains unknown. In this study, the binding interface of Vibrio cholerae (Vc) H-NOX/HK complex was characterized by hydrogen/deuterium exchange mass spectrometry (HDX-MS) and further validated by mutagenesis, leading to a new model for NO-dependent kinase inhibition...
February 19, 2018: Biochemistry
https://www.readbyqxmd.com/read/29457872/simple-method-for-the-determination-of-personal-care-product-ingredients-in-lettuce-by-ultrasound-assisted-extraction-combined-with-solid-phase-microextraction-followed-by-gc-ms
#18
Jerónimo Cabrera-Peralta, Araceli Peña-Alvarez
A simple method for the simultaneous determination of personal care product ingredients: galaxolide, tonalide, oxybenzone, 4-methylbenzyliden camphor, padimate-o, 2-ethylhexyl methoxycinnamate, octocrylene, triclosan and methyl triclosan in lettuce by ultrasound-assisted extraction combined with solid-phase microextraction followed by gas chromatography with mass spectrometry was developed. Lettuce was directly extracted by ultrasound-assisted extraction with methanol, this extract was combined with water, extracted by solid-phase microextraction in immersion mode and analyzed by gas chromatography with mass spectrometry...
February 19, 2018: Journal of Separation Science
https://www.readbyqxmd.com/read/29457870/effect-of-the-flow-profile-on-separation-efficiency-in-pressure-assisted-reversed-polarity-capillary-zone-electrophoresis-of-anions-simulation-and-experimental-evaluation
#19
Gabor Jarvas, Marton Szigeti, Andras Guttman
Capillary electrophoresis connected to electrospray ionization mass spectrometry is a promising combination to analyze complex biological samples. The use of sheathless electrospray ionization interfaces, such as a porous nanoelectrospray capillary emitter, requires the application of forward flow (either by pressure or electroosmosis) to maintain the electrospray process. The analysis of solute molecules with strong negative charges (e.g., aminopyrenetrisulfonate labeled glycans) necessitates a reversed-polarity capillary electrophoresis separation mode, in which case the electroosmotic flow is counter current, thus pressure assistance is necessary...
February 19, 2018: Journal of Separation Science
https://www.readbyqxmd.com/read/29457812/diffusive-interaction-of-multiple-surface-nanobubbles-shrinkage-growth-and-coarsening
#20
Xiaojue Zhu, Roberto Verzicco, Xuehua Zhang, Detlef Lohse
Surface nanobubbles are nanoscopic spherical-cap shaped gaseous domains on immersed substrates which are stable, even for days. After the stability of a single surface nanobubble has been theoretically explained, i.e. contact line pinning and gas oversaturation are required to stabilize it against diffusive dissolution [Lohse and Zhang, Phys. Rev. E, 2015, 91, 031003(R)], here we focus on the collective diffusive interaction of multiple nanobubbles. For that purpose we develop a finite difference scheme for the diffusion equation with the appropriate boundary conditions and with the immersed boundary method used to represent the growing or shrinking bubbles...
February 19, 2018: Soft Matter
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