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https://www.readbyqxmd.com/read/28808988/transoral-resection-of-human-papillomavirus-hpv-positive-squamous-cell-carcinoma-of-the-oropharynx-outcomes-with-and-without-adjuvant-therapy
#1
Ryan S Jackson, Parul Sinha, Joseph Zenga, Dorina Kallogjeri, Jasmina Suko, Eliot Martin, Eric J Moore, Bruce H Haughey
BACKGROUND: With the rise of oropharyngeal squamous cell carcinoma associated with human papillomavirus (HPV), appropriate treatment strategies continue to be tailored toward minimizing treatment while preserving oncologic outcomes. This study aimed to compare the outcomes for those undergoing transoral resection with or without adjuvant therapy for HPV-related oropharyngeal carcinoma. METHODS: A case-match cohort analysis was performed at two institutions on patients with HPV-related oropharyngeal squamous cell carcinoma...
August 14, 2017: Annals of Surgical Oncology
https://www.readbyqxmd.com/read/28805863/spin-polynomial-similarity-transformation-for-repulsive-hamiltonians-interpolating-between-coupled-cluster-and-spin-projected-unrestricted-hartree-fock
#2
John A Gomez, Matthias Degroote, Jinmo Zhao, Yiheng Qiu, Gustavo E Scuseria
Our overarching goal is to be able to describe both weak and strong correlation with a single, computationally affordable method without sacrificing important qualities of the wavefunction, e.g. symmetries of the Hamiltonian. We know that coupled cluster theory with low-order excitations is excellent at describing weakly-correlated systems near equilibrium, but breaks down as systems become more strongly correlated. Projected Hartree-Fock on the other hand is inherently capable of describing multireference character, but misses weak correlation...
August 14, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28801820/lymph-node-evaluation-in-robot-assisted-versus-video-assisted-thoracoscopic-esophagectomy-for-esophageal-squamous-cell-carcinoma-a-propensity-matched-analysis
#3
Yin-Kai Chao, Ming-Ju Hsieh, Yun-Hen Liu, Hui-Ping Liu
OBJECTIVE: Radical lymph node dissection (LND) along the bilateral recurrent laryngeal nerve (RLN) is a surgically challenging procedure with a high rate of morbidity. Here, we assessed in a retrospective manner the adequacy of LND along the RLN performed with robot-assisted thoracoscopic esophagectomy (RATE) versus video-assisted thoracoscopic esophagectomy (VATE) in patients with esophageal squamous cell carcinoma (ESCC). METHODS: This was a single-center, retrospective, propensity-matched study...
August 11, 2017: World Journal of Surgery
https://www.readbyqxmd.com/read/28777539/stoichiometry-and-dispersity-of-dna-nanostructures-using-photobleaching-pair-correlation-analysis
#4
Amani A Hariri, Graham D Hamblin, Jack S Hardwick, Robert Godin, Jean-Francois Desjardins, Paul W Wiseman, Hanadi F Sleiman, Gonzalo Cosa
A wide variety of approaches have become available for fabricating nanomaterials with increasing degrees of complexity, precision, and speed while minimizing cost. Their quantitative characterization however remains a challenge. Analytical methods to better inspect and validate the structure/composition of large nanoscale objects are required to optimize their applications in diverse technologies. Here we describe single molecule fluorescence-based strategies relying on photobleaching and multiple color colocalization features toward the characterization of supramolecular structures...
August 4, 2017: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/28770992/in-silico-screening-of-two-dimensional-separation-selectivity-for-ion-chromatography-%C3%A3-capillary-electrophoresis-separation-of-low-molecular-mass-organic-acids
#5
Leila Ranjbar, Mohammad Talebi, Paul Raymond Haddad, Soo Hyun Park, Joan Marc Cabot, Min Zhang, Petr Smejkal, Joe P Foley, Michael C Breadmore
A prerequisite for ordered two-dimensional (2D) separations and full utilisation of the enhanced 2D peak capacity is selec-tive exploitation of the sample attributes, described as sample dimensionality. In order to take sample dimensionality into account prior to optimisation of a 2D separation, a new concept based on construction of 2D separation selectivity maps is proposed and demonstrated for ion chromatography × capillary electrophoresis (IC×CE) separation of low-molecular-mass organic acids as test analytes...
August 3, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28732215/a-method-for-next-generation-sequencing-of-paired-diagnostic-and-remission-samples-to-detect-mitochondrial-dna-mutations-associated-with-leukemia
#6
Ilaria S Pagani, Chung H Kok, Verity A Saunders, Mark B Van der Hoek, Susan L Heatley, Anthony P Schwarer, Christopher N Hahn, Timothy P Hughes, Deborah L White, David M Ross
Somatic mitochondrial DNA (mtDNA) mutations have been identified in many human cancers, including leukemia. To identify somatic mutations, it is necessary to have a control tissue from the same individual for comparison. When patients with leukemia achieve remission, the remission peripheral blood may be a suitable and easily accessible control tissue, but this approach has not previously been applied to the study of mtDNA mutations. We have developed and validated a next-generation sequencing approach for the identification of leukemia-associated mtDNA mutations in 26 chronic myeloid leukemia patients at diagnosis using either nonhematopoietic or remission blood samples as the control...
July 18, 2017: Journal of Molecular Diagnostics: JMD
https://www.readbyqxmd.com/read/28732156/fixed-bed-modeling-of-nonsteroidal-anti-inflammatory-drug-removal-by-ion-exchange-in-synthetic-urine-mass-removal-or-toxicity-reduction
#7
Kelly Ann Landry, Treavor H Boyer
Ion-exchange removal of nonsteroidal anti-inflammatory drugs (NSAIDs) in synthetic urine can selectively remove pharmaceuticals with minimal co-removal of nutrients to enhance nutrient recovery efforts. However, the effect of endogenous metabolites in urine on ion-exchange removal, and the corresponding reduction in ecotoxicity potential of pharmaceuticals in treated urine entering the environment, is unknown. To assess treatment efficacy, this work paired predicted breakthrough curves determined by the homogenous surface diffusion model to an in vitro bioassay to evaluate COX-1 inhibition...
July 21, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28730541/increased-sequencing-depth-does-not-increase-captured-diversity-of-arbuscular-mycorrhizal-fungi
#8
Martti Vasar, Reidar Andreson, John Davison, Teele Jairus, Mari Moora, Maido Remm, J P W Young, Martin Zobel, Maarja Öpik
The arrival of 454 sequencing represented a major breakthrough by allowing deeper sequencing of environmental samples than was possible with existing Sanger approaches. Illumina MiSeq provides a further increase in sequencing depth but shorter read length compared with 454 sequencing. We explored whether Illumina sequencing improves estimates of arbuscular mycorrhizal (AM) fungal richness in plant root samples, compared with 454 sequencing. We identified AM fungi in root samples by sequencing amplicons of the SSU rRNA gene with 454 and Illumina MiSeq paired-end sequencing...
July 20, 2017: Mycorrhiza
https://www.readbyqxmd.com/read/28728601/transabdominal-laparoscopic-retroperitoneal-neurectomy-for-chronic-pain-after-inguinal-hernia-repair-and-appendicectomy-a-matched-pair-study
#9
Ioannis Karampinis, Johannes Weiss, Lothar Pilz, Stefan Post, Florian Herrle
BACKGROUND: Chronic debilitating pain is a rare but significant cause of postoperative morbidity after inguinal surgery. Such pain is usually of neuropathic origin and frequently caused by intraoperative nerve damage. In this retrospective matched-pair study we analysed results of a minimal-invasive approach to neurectomy on quality of life and pain relief. METHODS: From March 2010 to January 2012, 9 patients developing chronic neuropathic pain after inguinal hernia repair (8 patients) or open appendicectomy (one patient) were operated using a laparoscopic transabdominal approach in our department...
July 20, 2017: BMC Surgery
https://www.readbyqxmd.com/read/28708548/predicting-locations-of-high-risk-plaques-in-coronary-arteries-in-patients-receiving-statin-therapy
#10
Ling Zhang, Andreas Wahle, Zhi Chen, John J Lopez, Tomas Kovarnik, Milan Sonka
Features of high-risk coronary artery plaques prone to major adverse cardiac events (MACE) were identified by intravascular ultrasound (IVUS) virtual histology (VH). These plaque features are: Thin-cap fibroatheroma (TCFA), plaque burden PB≥70%, or minimal luminal area MLA≤4mm². Identification of arterial locations likely to later develop such high-risk plaques may help prevent MACE. We report a machine learning method for prediction of future high-risk coronary plaque locations and types in patients under statin therapy...
July 11, 2017: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/28690049/initial-validation-of-blubber-cortisol-and-progesterone-as-indicators-of-stress-response-and-maturity-in-an-otariid-the-california-sea-lion-zalophus-californianus
#11
Nicole E Beaulieu-McCoy, Kathryn K Sherman, Marisa L Trego, Daniel E Crocker, Nicholas M Kellar
Chronic stress can have detrimental effects on an individual's health and reproductive success. The use of cortisol quantification as an indicator of stress in free-ranging cetaceans and phocids is increasing but no studies have applied this technique on blubber in otariids. We measured cortisol concentrations in blubber samples obtained from California sea lions, Zalophus californianus, stranded in San Diego County and those incidentally killed in the California drift gillnet fishery. We also measured progesterone concentrations to assess female reproductive status and, in males, as a potential secondary measure of adrenal steroid production...
July 8, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/28666879/correction-of-metal-induced-susceptibility-artifacts-for-functional-mri-during-deep-brain-stimulation
#12
Myung-Ho In, Shinho Cho, Yunhong Shu, Hoon-Ki Min, Matt A Bernstein, Oliver Speck, Kendall H Lee, Hang Joon Jo
Functional magnetic resonance imaging (fMRI) is an emerging tool for investigating brain activation associated with, or modulated by, deep brain stimulation (DBS). However, DBS-fMRI generally suffers from severe susceptibility to artifacts in regions near the metallic stimulation electrodes, as well as near tissue/air boundaries of the brain. These result in strong intensity and geometric distortions along the phase-encoding (PE) (i.e., blipped) direction in gradient-echo echo-planar imaging (GE-EPI). Distortion presents a major challenge to conducting reliable data analysis and in interpreting the findings...
June 27, 2017: NeuroImage
https://www.readbyqxmd.com/read/28649186/a-sas-macro-for-covariate-constrained-randomization-of-general-cluster-randomized-and-unstratified-designs
#13
Erich J Greene
Ivers et al. (2012) have recently stressed the importance to both statistical power and face validity of balancing allocations to study arms on relevant covariates. While several techniques exist (e.g., minimization, pair-matching, stratification), the covariate-constrained randomization (CCR) approach proposed by Moulton (2004) is favored when clusters can be recruited prior to randomization. CCRA V1.0, a macro published by Chaudhary and Moulton (2006), provides a SAS implementation of CCR for a particular subset of possible designs (those with two arms, small numbers of strata and clusters, an equal number of clusters within each stratum, and constraints that can be expressed as absolute mean differences between arms)...
April 2017: Journal of Statistical Software
https://www.readbyqxmd.com/read/28634149/a-non-invasive-restraining-system-for-awake-mouse-imaging
#14
Dan Madularu, Axel P Mathieu, Chathura Kumaragamage, Lauren M Reynolds, Jamie Near, Cecilia Flores, M Natasha Rajah
BACKGROUND: Preclinical neuroimaging allows for the assessment of brain anatomy, connectivity and function in laboratory animals, such as mice and rats. Most of these studies are performed under anesthesia to avoid movement during the scanning sessions. METHOD: Due to the limitations associated with anesthetized imaging, recent efforts have been made to conduct rodent imaging studies in awake animals, habituated to the restraint systems used in these instances. As of now, only one such system is commercially available for mouse scanning (Animal Imaging Research, Boston, MA, USA) integrating the radiofrequency coil electronics with the restraining element, an approach which, although effective in reducing head motion during awake imaging, has some limitations...
June 17, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/28633695/how-should-discordance-between-molecular-and-growth-based-assays-for-rifampicin-resistance-be-investigated
#15
S Hofmann-Thiel, H Hoffmann, D Hillemann, L Rigouts, A Van Deun, K Kranzer
Molecular tests to detect the presence of Mycobacterium tuberculosis and genetic polymorphisms in the rpoB gene conferring resistance to rifampicin (RMP) have become integral parts of tuberculosis diagnostics worldwide. These assays are often performed sequentially or in parallel to phenotypic drug susceptibility testing. Discordances between molecular and phenotypic tests invariably occur. Root causes range from pre-, post- and analytic errors to co-existence of non-tuberculous mycobacteria, silent mutations, mutations outside the 81 base-pair RMP resistance-determining region, non-canonical mutations conferring increased minimal inhibitory concentrations below the critical concentration in some phenotypic drug susceptibility tests, and heteroresistance...
July 1, 2017: International Journal of Tuberculosis and Lung Disease
https://www.readbyqxmd.com/read/28606893/young-people-adult-worries-randomized-controlled-trial-and-feasibility-study-of-the-internet-based-self-support-method-feel-the-vibe-for-adolescents-and-young-adults-exposed-to-family-violence
#16
Karin van Rosmalen-Nooijens, Sylvie Lo Fo Wong, Judith Prins, Toine Lagro-Janssen
BACKGROUND: Adolescents and young adults (AYAs) are of special interest in a group of children exposed to family violence (FV). Past-year prevalence of exposure to FV is known to be highest in AYAs and has severe consequences. Peer support is an effective approach to behavior change and the Internet is considered suitable as a mode of delivery. OBJECTIVE: The study aimed to evaluate both effectiveness and feasibility of a randomized controlled trial (RCT) and feasibility study of the Internet-based self-support method "Feel the ViBe" (FtV) using mixed-methods approach to fully understand the strengths and weaknesses of a new intervention...
June 12, 2017: Journal of Medical Internet Research
https://www.readbyqxmd.com/read/28604610/an-nfc-on-two-coil-wpt-link-for-implantable-biomedical-sensors-under-ultra-weak-coupling
#17
Chen Gong, Dake Liu, Zhidong Miao, Wei Wang, Min Li
The inductive link is widely used in implantable biomedical sensor systems to achieve near-field communication (NFC) and wireless power transfer (WPT). However, it is tough to achieve reliable NFC on an inductive WPT link when the coupling coefficient is ultra-low (0.01 typically), since the NFC signal (especially for the uplink from the in-body part to the out-body part) could be too weak to be detected. Traditional load shift keying (LSK) requires strong coupling to pass the load modulation information to the power source...
June 11, 2017: Sensors
https://www.readbyqxmd.com/read/28600436/accurate-quantification-of-chromosomal-lesions-via-short-tandem-repeat-analysis-using-minimal-amounts-of-dna
#18
Johann-Christoph Jann, Daniel Nowak, Florian Nolte, Stephanie Fey, Verena Nowak, Julia Obländer, Jovita Pressler, Iris Palme, Christina Xanthopoulos, Alice Fabarius, Uwe Platzbecker, Aristoteles Giagounidis, Katharina Götze, Anne Letsch, Detlef Haase, Richard Schlenk, Gesine Bug, Michael Lübbert, Arnold Ganser, Ulrich Germing, Claudia Haferlach, Wolf-Karsten Hofmann, Maximilian Mossner
BACKGROUND: Cytogenetic aberrations such as deletion of chromosome 5q (del(5q)) represent key elements in routine clinical diagnostics of haematological malignancies. Currently established methods such as metaphase cytogenetics, FISH or array-based approaches have limitations due to their dependency on viable cells, high costs or semi-quantitative nature. Importantly, they cannot be used on low abundance DNA. We therefore aimed to establish a robust and quantitative technique that overcomes these shortcomings...
June 9, 2017: Journal of Medical Genetics
https://www.readbyqxmd.com/read/28595649/data-driven-prediction-of-adverse-drug-reactions-induced-by-drug-drug-interactions
#19
Ruifeng Liu, Mohamed Diwan M AbdulHameed, Kamal Kumar, Xueping Yu, Anders Wallqvist, Jaques Reifman
BACKGROUND: The expanded use of multiple drugs has increased the occurrence of adverse drug reactions (ADRs) induced by drug-drug interactions (DDIs). However, such reactions are typically not observed in clinical drug-development studies because most of them focus on single-drug therapies. ADR reporting systems collect information on adverse health effects caused by both single drugs and DDIs. A major challenge is to unambiguously identify the effects caused by DDIs and to attribute them to specific drug interactions...
June 8, 2017: BMC Pharmacology & Toxicology
https://www.readbyqxmd.com/read/28587598/methodologic-considerations-in-the-design-and-analysis-of-nested-case-control-studies-association-between-cytokines-and-postoperative-delirium
#20
Long H Ngo, Sharon K Inouye, Richard N Jones, Thomas G Travison, Towia A Libermann, Simon T Dillon, George A Kuchel, Sarinnapha M Vasunilashorn, David C Alsop, Edward R Marcantonio
BACKGROUND: The nested case-control study (NCC) design within a prospective cohort study is used when outcome data are available for all subjects, but the exposure of interest has not been collected, and is difficult or prohibitively expensive to obtain for all subjects. A NCC analysis with good matching procedures yields estimates that are as efficient and unbiased as estimates from the full cohort study. We present methodological considerations in a matched NCC design and analysis, which include the choice of match algorithms, analysis methods to evaluate the association of exposures of interest with outcomes, and consideration of overmatching...
June 6, 2017: BMC Medical Research Methodology
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