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https://www.readbyqxmd.com/read/29342288/association-between-abcg2-rs2231142-and-poor-response-to-allopurinol-replication-and-meta-analysis
#1
Mary C Wallace, Rebecca L Roberts, Payal Nanavati, Jeffrey N Miner, Nicola Dalbeth, Ruth Topless, Tony R Merriman, Lisa K Stamp
Objective: ABCG2 rs2231142 (Q141K) has been reported to be associated with poor response to allopurinol, while there are conflicting data on the association between the genetically independent ABCG2 rs10011796 variant and allopurinol response. The aim of this study was to replicate the association of ABCG2 rs2231142 and rs10011796 with allopurinol response and perform a meta-analysis. Methods: Participants in the Long-term Allopurinol Safety Study Evaluating Outcomes in Gout Patients (LASSO) (n = 299) were studied...
January 12, 2018: Rheumatology
https://www.readbyqxmd.com/read/29342139/structure-and-mutagenesis-reveal-essential-capsid-protein-interactions-for-kshv-replication
#2
Xinghong Dai, Danyang Gong, Hanyoung Lim, Jonathan Jih, Ting-Ting Wu, Ren Sun, Z Hong Zhou
Kaposi's sarcoma-associated herpesvirus (KSHV) causes Kaposi's sarcoma, a cancer that commonly affects patients with AIDS and which is endemic in sub-Saharan Africa. The KSHV capsid is highly pressurized by its double-stranded DNA genome, as are the capsids of the eight other human herpesviruses. Capsid assembly and genome packaging of herpesviruses are prone to interruption and can therefore be targeted for the structure-guided development of antiviral agents. However, herpesvirus capsids-comprising nearly 3,000 proteins and over 1,300 Å in diameter-present a formidable challenge to atomic structure determination and functional mapping of molecular interactions...
January 17, 2018: Nature
https://www.readbyqxmd.com/read/29340021/a-novel-messenger-rna-signature-as-a-prognostic-biomarker-for-predicting-relapse-in-pancreatic-ductal-adenocarcinoma
#3
Guodong Shi, Jingjing Zhang, Zipeng Lu, Dongfang Liu, Yang Wu, Pengfei Wu, Jie Yin, Hao Yuan, Qicong Zhu, Lei Chen, Yue Fu, Yunpeng Peng, Yan Wang, Kuirong Jiang, Yi Miao
Pancreatic ductal adenocarcinoma (PDAC) death rate and recurrence rate have remained obstinately high. Current methods can not satisfy the need of predicting cancer relapse accurately. Utilizing expression profiles of 10 GEO datasets (N = 774), we identified 154 differentially expressed genes (DEGs) between PDAC and normal pancreas tissue or paracancerous tissue. Next we built a 16-mRNA-based signature by means of the LASSO COX regression model. We also validated the prognostic value of the signature. Patients were classified into high-risk and low-risk group according to the signature risk score; 1 year RFS was 45% (95% CI: 31...
December 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/29337922/underdetermined-wideband-doa-estimation-for-off-grid-sources-with-coprime-array-using-sparse-bayesian-learning
#4
Yanhua Qin, Yumin Liu, Jianyi Liu, Zhongyuan Yu
Sparse Bayesian learning (SBL) is applied to the coprime array for underdetermined wideband direction of arrival (DOA) estimation. Using the augmented covariance matrix, the coprime array can achieve a higher number of degrees of freedom (DOFs) to resolve more sources than the number of physical sensors. The sparse-based DOA estimation can deteriorate the detection and estimation performance because the sources may be off the search grid no matter how fine the grid is. This dictionary mismatch problem can be well resolved by the SBL using fixed point updates...
January 16, 2018: Sensors
https://www.readbyqxmd.com/read/29336255/fast-screening-technology-for-drug-emergency-management-predicting-suspicious-snps-for-adr-with-information-theory-based-models
#5
Zhaohui Liang, Jun Liu, Jimmy Xiangji Huang, Xing Zeng
OBJECTIVE: The genetic polymorphism of Cytochrome P450 (CYP 450) is considered as one of the main causes for adverse drug reactions (ADRs). In order to explore the latent correlations between ADRs and potentially corresponding single-nucleotide polymorphism (SNPs) in CYP450, three algorithms based on information theory are used as the main method to predict the possible relation. METHODS: The study uses a retrospective case-control study to explore the potential relation of ADRs to specific genomic locations and single-nucleotide polymorphism (SNP)...
January 14, 2018: Combinatorial Chemistry & High Throughput Screening
https://www.readbyqxmd.com/read/29331575/validation-of-mri-to-trus-registration-for-high-dose-rate-prostate-brachytherapy
#6
Eric Poulin, Karim Boudam, Csaba Pinter, Samuel Kadoury, Andras Lasso, Gabor Fichtinger, Cynthia Ménard
PURPOSE: The objective of this study was to develop and validate an open-source module for MRI to transrectal ultrasound (TRUS) registration to support tumor-targeted prostate brachytherapy. METHODS AND MATERIALS: In this study, 15 patients with prostate cancer lesions visible on multiparametric MRI were selected for the validation. T2-weighted images with 1-mm isotropic voxel size and diffusion weighted images were acquired on a 1.5T Siemens imager. Three-dimensional (3D) TRUS images with 0...
January 10, 2018: Brachytherapy
https://www.readbyqxmd.com/read/29329660/cochlea-ct-radiomics-predicts-chemoradiotherapy-induced-sensorineural-hearing-loss-in-head-and-neck-cancer-patients-a-machine-learning-and-multi-variable-modelling-study
#7
Hamid Abdollahi, Shayan Mostafaei, Susan Cheraghi, Isaac Shiri, Seied Rabi Mahdavi, Anoshirvan Kazemnejad
OBJECTIVES: Immediately or after head-and-neck (H&N) cancer chemoradiotherapy (CRT), patients may undergone significant sensorineural hearing loss (SNHL) which could affect their quality of life. Radiomic feature analysis is proposed to predict SNHL induced by CRT. MATERIAL AND METHODS: 490 image features of 94 cochlea from 47 patients treated with three dimensional conformal RT (3DCRT) for different H&N cancers were extracted from CT images. Different machine learning (ML) algorithms and also least absolute shrinkage and selection operator (LASSO) penalized logistic regression were implemented on radiomic features for feature selection, classification and prediction...
January 9, 2018: Physica Medica: PM
https://www.readbyqxmd.com/read/29321212/prognostic-value-of-right-ventricular-dysfunction-in-heart-failure-with-reduced-ejection-fraction-superiority-of-longitudinal-strain-over-tricuspid-annular-plane-systolic-excursion
#8
Erberto Carluccio, Paolo Biagioli, Gianfranco Alunni, Adriano Murrone, Cinzia Zuchi, Stefano Coiro, Clara Riccini, Anna Mengoni, Antonella D'Antonio, Giuseppe Ambrosio
BACKGROUND: In heart failure (HF) with reduced ejection fraction, right ventricular (RV) impairment, as defined by reduced tricuspid annular plane systolic excursion, is a predictor of poor outcome. However, peak longitudinal strain of RV free wall (RVFWS) has been recently proposed as a more accurate and sensitive tool to evaluate RV function. Accordingly, we investigated whether RVFWS could help refine prognosis of patients with HF with reduced ejection fraction in whom tricuspid annular plane systolic excursion is still preserved...
January 2018: Circulation. Cardiovascular Imaging
https://www.readbyqxmd.com/read/29314035/economic-evaluation-of-floseal-compared-to-nasal-packing-for-the-management-of-anterior-epistaxis
#9
Andre Le, Kednapa Thavorn, Andrea Lasso, Shaun J Kilty
OBJECTIVES/HYPOTHESIS: To evaluate the cost-effectiveness of Floseal, a topically applied hemostatic agent, and nasal packing for the management of epistaxis in Canada. STUDY DESIGN: Outcomes research, a cost-utility analysis. METHODS: We developed a Markov model to compare the costs and health outcomes of Floseal with nasal packing over a lifetime horizon from the perspective of a publicly funded healthcare system. A cycle length of 1 year was used...
January 4, 2018: Laryngoscope
https://www.readbyqxmd.com/read/29306958/case-control-study-of-endoscopic-polypectomy-in-clinic-epic-versus-endoscopic-sinus-surgery-for-chronic-rhinosinusitis-with-polyps
#10
S J Kilty, A Lasso, L Mfuna-Endam, M Y Desrosiers
INTRODUCTION: Endoscopic Polypectomy In Clinic (EPIC) is a recently described deescalated form of endoscopic sinus surgery (ESS) performed in the outpatient clinic for patients with chronic rhinosinusitis with polyps (CRSwNP). The quality of life benefit of EPIC in comparison to ESS is not known. The purpose of this study was to determine if the disease specific quality of life measured with the SNOT-22 attained with EPIC is similar to that attained with ESS for patients with CRSwNP. METHODS: A multi-institutional observational case-control study was performed to evaluate quality of life improvement in patients treated with ESS and EPIC for CRSwNP with a 3 month follow-up...
January 7, 2018: Rhinology
https://www.readbyqxmd.com/read/29298873/multicentre-prospective-evaluation-of-real-time-optical-diagnosis-of-t1-colorectal-cancer-in-large-non-pedunculated-colorectal-polyps-using-narrow-band-imaging-the-optical-study
#11
Yara Backes, Matthijs P Schwartz, Frank Ter Borg, Frank H J Wolfhagen, John N Groen, Wouter H de Vos Tot Nederveen Cappel, Jeroen van Bergeijk, Joost M J Geesing, Bernhard W M Spanier, Paul Didden, Frank P Vleggaar, Miangela M Lacle, Sjoerd G Elias, Leon M G Moons
OBJECTIVE: This study evaluated the preresection accuracy of optical diagnosis of T1 colorectal cancer (CRC) in large non-pedunculated colorectal polyps (LNPCPs). DESIGN: In this multicentre prospective study, endoscopists predicted the histology during colonoscopy in consecutive patients with LNPCPs using a standardised procedure for optical assessment. The presence of morphological features assessed with white light, and vascular and surface pattern with narrow-band imaging (NBI) were recorded, together with the optical diagnosis, the confidence level of prediction and the recommended treatment...
January 3, 2018: Gut
https://www.readbyqxmd.com/read/29297378/identifying-drug-pathway-association-pairs-based-on-l2-1-integrative-penalized-matrix-decomposition
#12
Jin-Xing Liu, Dong-Qin Wang, Chun-Hou Zheng, Ying-Lian Gao, Sha-Sha Wu, Jun-Liang Shang
BACKGROUND: Traditional drug identification methods follow the "one drug-one target" thought. But those methods ignore the natural characters of human diseases. To overcome this limitation, many identification methods of drug-pathway association pairs have been developed, such as the integrative penalized matrix decomposition (iPaD) method. The iPaD method imposes the L1-norm penalty on the regularization term. However, lasso-type penalties have an obvious disadvantage, that is, the sparsity produced by them is too dispersive...
December 14, 2017: BMC Systems Biology
https://www.readbyqxmd.com/read/29288387/a-novel-group-fused-sparse-partial-correlation-method-for-simultaneous-estimation-of-functional-networks-in-group-comparison-studies
#13
Xiaoyun Liang, David N Vaughan, Alan Connelly, Fernando Calamante
The conventional way to estimate functional networks is primarily based on Pearson correlation along with classic Fisher Z test. In general, networks are usually calculated at the individual-level and subsequently aggregated to obtain group-level networks. However, such estimated networks are inevitably affected by the inherent large inter-subject variability. A joint graphical model with Stability Selection (JGMSS) method was recently shown to effectively reduce inter-subject variability, mainly caused by confounding variations, by simultaneously estimating individual-level networks from a group...
December 29, 2017: Brain Topography
https://www.readbyqxmd.com/read/29286281/molecular-structure-of-human-katp-in-complex-with-atp-and-adp
#14
Kenneth Pak Kin Lee, Jue Chen, Roderick MacKinnon
In many excitable cells KATP channels respond to intracellular adenosine nucleotides: ATP inhibits while ADP activates. We present two structures of the human pancreatic KATP channel, containing the ABC transporter SUR1 and the inward-rectifier K+ channel Kir6.2, in the presence of Mg2+ and nucleotides. These structures, referred to as quatrefoil and propeller forms, were determined by single-particle cryo-EM at 3.9 Å and 5.6 Å, respectively. In both forms ATP occupies the inhibitory site in Kir6.2. The nucleotide-binding domains of SUR1 are dimerized with Mg2+-ATP in the degenerate site and Mg2+-ADP in the consensus site...
December 29, 2017: ELife
https://www.readbyqxmd.com/read/29284500/cytokine-signatures-in-chronic-fatigue-syndrome-patients-a-case-control-study-and-the-effect-of-anakinra-treatment
#15
Megan E Roerink, Hans Knoop, Ewald M Bronkhorst, Henk A Mouthaan, Luuk J A C Hawinkels, Leo A B Joosten, Jos W M van der Meer
BACKGROUND: Cytokine disturbances have been suggested to be associated with the Chronic Fatigue Syndrome/Myalgic encephalomyelitis (CFS/ME) for decades. METHODS: Fifty female CFS patients were included in a study on the effect of the interleukin-1-receptor antagonist anakinra or placebo during 4 weeks. EDTA plasma was collected from patients before and directly after treatment. At baseline, plasma samples were collected at the same time from 48 healthy, age-matched female neighborhood controls...
December 29, 2017: Journal of Translational Medicine
https://www.readbyqxmd.com/read/29283691/relationships-between-the-external-and-internal-training-load-in-professional-soccer-what-can-we-learn-from-machine-learning
#16
Arne Jaspers, Tim Op De Beéck, Michel S Brink, Wouter G P Frencken, Filip Staes, Jesse J Davis, Werner F Helsen
PURPOSE: Machine learning may contribute to understanding the relationship between the external load and internal load in professional soccer. Therefore, the relationship between external load indicators and the rating of perceived exertion (RPE) was examined using machine learning techniques on a group and individual level. METHODS: Training data were collected from 38 professional soccer players over two seasons. The external load was measured using global positioning system technology and accelerometry...
December 28, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29281638/mplasso-inferring-microbial-association-networks-using-prior-microbial-knowledge
#17
Chieh Lo, Radu Marculescu
Due to the recent advances in high-throughput sequencing technologies, it becomes possible to directly analyze microbial communities in human body and environment. To understand how microbial communities adapt, develop, and interact with the human body and the surrounding environment, one of the fundamental challenges is to infer the interactions among different microbes. However, due to the compositional and high-dimensional nature of microbial data, statistical inference cannot offer reliable results. Consequently, new approaches that can accurately and robustly estimate the associations (putative interactions) among microbes are needed to analyze such compositional and high-dimensional data...
December 27, 2017: PLoS Computational Biology
https://www.readbyqxmd.com/read/29279858/unsupervised-network-analysis-of-the-plastic-supraoptic-nucleus-transcriptome-predicts-caprin2-regulatory-interactions
#18
Su-Yi Loh, Thomas Jahans-Price, Michael P Greenwood, Mingkwan Greenwood, See-Ziau Hoe, Agnieszka Konopacka, Colin Campbell, David Murphy, Charles C T Hindmarch
The supraoptic nucleus (SON) is a group of neurons in the hypothalamus responsible for the synthesis and secretion of the peptide hormones vasopressin and oxytocin. Following physiological cues, such as dehydration, salt-loading and lactation, the SON undergoes a function related plasticity that we have previously described in the rat at the transcriptome level. Using the unsupervised graphical lasso (Glasso) algorithm, we reconstructed a putative network from 500 plastic SON genes in which genes are the nodes and the edges are the inferred interactions...
November 2017: ENeuro
https://www.readbyqxmd.com/read/29279146/pretreatment-mr-imaging-radiomics-signatures-for-response-prediction-to-induction-chemotherapy-in-patients-with-nasopharyngeal-carcinoma
#19
Guangyi Wang, Lan He, Cai Yuan, Yanqi Huang, Zaiyi Liu, Changhong Liang
PURPOSE: This study aimed to investigate the capability of magnetic resonance (MR) imaging radiomics signatures for pretreatment prediction of early response to induction chemotherapy in patients with nasopharyngeal carcinoma (NPC). MATERIALS AND METHODS: This was a retrospective study consisting of 120 patients with biopsy-proven NPC (stage II-IV). Texture features were extracted from the pretreatment morphological MR images for each case. Radiomics signatures were obtained with the least absolute shrinkage and selection operator method (LASSO) logistic regression model...
January 2018: European Journal of Radiology
https://www.readbyqxmd.com/read/29273260/predicting-hypoxia-status-using-a-combination-of-contrast-enhanced-computed-tomography-and-18f-fluorodeoxyglucose-positron-emission-tomography-radiomics-features
#20
Mireia Crispin-Ortuzar, Aditya Apte, Milan Grkovski, Jung Hun Oh, Nancy Y Lee, Heiko Schöder, John L Humm, Joseph O Deasy
BACKGROUND AND PURPOSE: Hypoxia is a known prognostic factor in head and neck cancer. Hypoxia imaging PET radiotracers such as 18F-FMISO are promising but not widely available. The aim of this study was therefore to design a surrogate for 18F-FMISO TBRmax based on 18F-FDG PET and contrast-enhanced CT radiomics features, and to study its performance in the context of hypoxia-based patient stratification. METHODS: 121 lesions from 75 head and neck cancer patients were used in the analysis...
December 19, 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
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