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https://www.readbyqxmd.com/read/29041002/astragaloside-iv-induced-mir-134-expression-reduces-emt-and-increases-chemotherapeutic-sensitivity-by-suppressing-creb1-signaling-in-colorectal-cancer-cell-line-sw-480
#1
Qi Ye, Li Su, Dagui Chen, Wenyi Zheng, Ye Liu
BACKGROUND: Colorectal cancer (CRC) is one of the leading causes of cancer-related deaths worldwide. Although chemotherapy is the primary means in colorectal cancer treatment, it is burdenerd by adverse drug effects. Drug-resistance is one of the most important challenges for chemotherapy and epithelial-mesenchymal transition (EMT) plays critical role in the development of drug resistance. AIMS: The aim of this study was to investigate the mechanisms underlying the effect of astragaloside IV (AS-IV) on miR-134 expression, EMT and chemotherapeutic sensitivity in CRC...
October 17, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29040937/a-sensitive-hplc-ms-method-for-simultaneous-determination-of-thirteen-components-in-rat-plasma-and-its-application-to-pharmacokinetic-study-of-tanreqing-injection
#2
Su-Xiang Feng, Xian-He Li, Meng-Meng Wang, Rui Hao, Meng-Meng Li, Lei Zhang, Zhe Wang
A rapid, sensitive and selective method based on high-performance liquid chromatography coupled with Q-Exactive mass spectrometry was developed and validated for simultaneous quantification of thirteen components in rat plasma, including chlorogenic acid, 5-caffeoylquinic acid, 4-caffeoylquinic acid, luteoloside, isochlorogenic acid A, B and C, scutellarin, baicalin, wogonin, baicalein, phillyrin and forsythoside A. After precipitating proteins from the plasma samples with methanol, chromatographic separation of the thirteen components was achieved by using an XBridge™ C18 column (2...
October 13, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/29040926/a-rapid-naked-eye-detection-of-hypochlorite-and-bisulfite-using-a-robust-and-highly-photostable-indicator-dye-quinaldine-red-in-aqueous-medium
#3
Tanoy Dutta, Falguni Chandra, Apurba L Koner
A "naked-eye" detection of health hazardous bisulfite (HSO3(-)) and hypochlorite (ClO(-)) using an indicator dye (Quinaldine Red, QR) in a wide range of pH is demonstrated. The molecule contains a quinoline moiety linked to an N,N-dimethylaniline moiety with a conjugated double bond. Treatment of QR with HSO3(-) and ClO(-), in aqueous solution at near-neutral pH, resulted in a colorless product with high selectivity and sensitivity. The detection limit was 47.8μM and 0.2μM for HSO3(-) and ClO(-) respectively...
October 12, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/29040917/enhanced-diffusometric-immunosensing-with-grafted-gold-nanoparticles-for-detection-of-diabetic-retinopathy-biomarker-tumor-necrosis-factor-%C3%AE
#4
Han-Sheng Chuang, Yu-Ju Chen, Hui-Pin Cheng
Diffusometry is sensitive to geometric changes of particles. Target antigens can be detected through diffusivity changes resulting from their immunoreactions by functionalizing particle surface with a specific antibody. Considering that Brownian motion is a self-driven phenomenon, diffusometric immunosensing features several characteristics, such as no-washing steps, rapid detection, high flexibility, and high sensitivity. Until recently, this technique has been applied to many biomedical fields, such as monitoring of microorganism motility and diagnosis of diseases with biomarkers...
October 11, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/29040914/efficient-capture-rapid-killing-and-ultrasensitive-detection-of-bacteria-by-a-nano-decorated-multi-functional-electrode-sensor
#5
Runrun Wu, Yue Ma, Jianming Pan, Shih-Hui Lee, Jinxin Liu, Hengjia Zhu, Runxin Gu, Kenneth J Shea, Guoqing Pan
In this work, we demonstrated a nano-decorated porous impedance electrode sensor for efficient capture, rapid killing and ultrasensitive detection of bacteria. The multi-functional sensor was prepared by a facile sonochemical method via in situ deposition of antibacterial prickly Zn-CuO nanoparticles and graphene oxide (GO) nanosheets on a Ni porous electrode. Due to the surface burr-like nanostructures, the nano-decorated impedance sensor exhibited very good bacterial-capture efficiency (70 - 80% in 20min) even at a low concentration of 50 CFU mL(-1), rapid antibacterial rate (100% killing in 30min) and high detection sensitivity (as low as 10 CFU mL(-1))...
October 7, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/29040884/heart-rate-variability-feature-selection-in-the-presence-of-sleep-apnea-an-expert-system-for-the-characterization-and-detection-of-the-disorder
#6
Sofía Martín-González, Juan L Navarro-Mesa, Gabriel Juliá-Serdá, Jan F Kraemer, Niels Wessel, Antonio G Ravelo-García
We introduce a sleep apnea characterization and classification approach based on a Heart Rate Variability (HRV) feature selection process, thus focusing on the characterization of the underlying process from a cardiac rate point of view. Therefore, we introduce linear and nonlinear variables, namely Cepstrum Coefficients (CC), Filterbanks (Fbank) and Detrended Fluctuation Analysis (DFA). Logistic Regression, Linear Discriminant Analysis and Quadratic Discriminant Analysis were used for classification purposes...
October 7, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/29040777/efficient-imaging-examining-the-value-of-ultrasound-in-the-diagnosis-of-traumatic-adult-brachial-plexus-injuries-a-systematic-review
#7
Brian Chin, Maleka Ramji, Forough Farrokhyar, James R Bain
INTRODUCTION: Traumatic brachial plexus injury (BPI) can result in debilitating sequelae of the upper extremity. Presently, therapeutic decisions are based on the mechanism of injury, serial physical examination, electromyography, nerve conduction, and imaging studies. While magnetic resonance imaging is the current imaging modality of choice for BPI, ultrasound is a promising newcomer that is inexpensive, accessible, and available at point of care. OBJECTIVE: To evaluate ultrasound as a diagnostic tool in the assessment of traumatic adult BPI through a systematic review...
October 11, 2017: Neurosurgery
https://www.readbyqxmd.com/read/29040766/brain-to-brain-synchronization-across-two-persons-predicts-mutual-prosociality
#8
Yi Hu, Yinying Hu, Li Xianchun, Yafeng Pan, Xiaojun Cheng
People tend to be more prosocial after synchronizing behaviors with others, yet the underlying neural mechanisms are rarely known. In the present study, participant dyads performed either a coordination task or an independence task, with their brain activations recorded via the functional near-infrared spectroscopy (fNIRS) hyperscanning technique. Participant dyads in the coordination group showed higher synchronized behaviors and greater subsequent inclination to helping each other than those in the independent group, indicating the prosocial effect of interpersonal synchrony...
October 13, 2017: Social Cognitive and Affective Neuroscience
https://www.readbyqxmd.com/read/29040672/unsupervised-learning-of-spatiotemporal-interictal-discharges-in-focal-epilepsy
#9
Maxime O Baud, Jonathan K Kleen, Gopala K Anumanchipalli, Liberty S Hamilton, Yee-Leng Tan, Robert Knowlton, Edward F Chang
BACKGROUND: Interictal epileptiform discharges are an important biomarker for localization of focal epilepsy, especially in patients who undergo chronic intracranial monitoring. Manual detection of these pathophysiological events is cumbersome, but is still superior to current rule-based approaches in most automated algorithms. OBJECTIVE: To develop an unsupervised machine-learning algorithm for the improved, automated detection and localization of interictal epileptiform discharges based on spatiotemporal pattern recognition...
October 10, 2017: Neurosurgery
https://www.readbyqxmd.com/read/29040639/the-medical-science-dmz-a-network-design-pattern-for-data-intensive-medical-science
#10
Sean Peisert, Eli Dart, William Barnett, Edward Balas, James Cuff, Robert L Grossman, Ari Berman, Anurag Shankar, Brian Tierney
Objective: We describe a detailed solution for maintaining high-capacity, data-intensive network flows (eg, 10, 40, 100 Gbps+) in a scientific, medical context while still adhering to security and privacy laws and regulations. Materials and Methods: High-end networking, packet-filter firewalls, network intrusion-detection systems. Results: We describe a "Medical Science DMZ" concept as an option for secure, high-volume transport of large, sensitive datasets between research institutions over national research networks, and give 3 detailed descriptions of implemented Medical Science DMZs...
October 6, 2017: Journal of the American Medical Informatics Association: JAMIA
https://www.readbyqxmd.com/read/29040600/robust-inference-in-summary-data-mendelian-randomization-via-the-zero-modal-pleiotropy-assumption
#11
Fernando Pires Hartwig, George Davey Smith, Jack Bowden
Background: Mendelian randomization (MR) is being increasingly used to strengthen causal inference in observational studies. Availability of summary data of genetic associations for a variety of phenotypes from large genome-wide association studies (GWAS) allows straightforward application of MR using summary data methods, typically in a two-sample design. In addition to the conventional inverse variance weighting (IVW) method, recently developed summary data MR methods, such as the MR-Egger and weighted median approaches, allow a relaxation of the instrumental variable assumptions...
July 12, 2017: International Journal of Epidemiology
https://www.readbyqxmd.com/read/29040390/robust-and-sparse-correlation-matrix-estimation-for-the-analysis-of-high-dimensional-genomics-data
#12
Angela Serra, Pietro Coretto, Michele Fratello, Roberto Tagliaferri
Motivation: Microarray technology can be used to study the expression of thousands of genes across a number of different experimental conditions, usually hundreds. The underlying principle is that genes sharing similar expression patterns, across different samples, can be part of the same co-expression system, or they may share the same biological functions. Groups of genes are usually identified based on cluster analysis. Clustering methods rely on the similarity matrix between genes...
October 12, 2017: Bioinformatics
https://www.readbyqxmd.com/read/29040385/a-benchmarking-of-workflows-for-detecting-differential-splicing-and-differential-expression-at-isoform-level-in-human-rna-seq-studies
#13
Gabriela A Merino, Ana Conesa, Elmer A Fernández
Over the last few years, RNA-seq has been used to study alterations in alternative splicing related to several diseases. Bioinformatics workflows used to perform these studies can be divided into two groups, those finding changes in the absolute isoform expression and those studying differential splicing. Many computational methods for transcriptomics analysis have been developed, evaluated and compared; however, there are not enough reports of systematic and objective assessment of processing pipelines as a whole...
October 13, 2017: Briefings in Bioinformatics
https://www.readbyqxmd.com/read/29040359/a-rank-based-algorithm-of-differential-expression-analysis-for-small-cell-line-data-with-statistical-control
#14
Xiangyu Li, Hao Cai, Xianlong Wang, Lu Ao, You Guo, Jun He, Yunyan Gu, Lishuang Qi, Qingzhou Guan, Xu Lin, Zheng Guo
To detect differentially expressed genes (DEGs) in small-scale cell line experiments, usually with only two or three technical replicates for each state, the commonly used statistical methods such as significance analysis of microarrays (SAM), limma and RankProd (RP) lack statistical power, while the fold change method lacks any statistical control. In this study, we demonstrated that the within-sample relative expression orderings (REOs) of gene pairs were highly stable among technical replicates of a cell line but often widely disrupted after certain treatments such like gene knockdown, gene transfection and drug treatment...
October 13, 2017: Briefings in Bioinformatics
https://www.readbyqxmd.com/read/29040340/measuring-local-depletion-of-terrestrial-game-vertebrates-by-central-place-hunters-in-rural-amazonia
#15
Mark I Abrahams, Carlos A Peres, Hugo C M Costa
The degree to which terrestrial vertebrate populations are depleted in tropical forests occupied by human communities has been the subject of an intense polarising debate that has important conservation implications. Conservation ecologists and practitioners are divided over the extent to which community-based subsistence offtake is compatible with ecologically functional populations of tropical forest game species. To quantify depletion envelopes of forest vertebrates around human communities, we deployed a total of 383 camera trap stations and 78 quantitative interviews to survey the peri-community areas controlled by 60 semi-subsistence communities over a combined area of over 3...
2017: PloS One
https://www.readbyqxmd.com/read/29040212/vasopressor-cumulative-dose-requirement-and-risk-of-early-death-during-septic-shock-an-analysis-from-the-episs-cohort
#16
Auguste Dargent, Maxime Nguyen, Isabelle Fournel, Abderrahmane Bourredjem, Pierre-Emmanuel Charles, Jean-Pierre Quenot
Septic shock is the primary cause of death in intensive care units, with about 20% of patients dying in the first 3 days. To design future trials focused on early mortality, we require knowledge of early indicators that can detect patients at high risk of early death from refractory septic shock.The aim of this study was to assess whether the cumulative dose of vasopressors (CDV), calculated as the cumulative dose of epinephrine + norepinephrine, is a predictor of early death (within 72 hours) attributable to refractory septic shock (EDASS)...
October 16, 2017: Shock
https://www.readbyqxmd.com/read/29040080/detection-of-giardia-intestinalis-in-water-samples-collected-from-natural-water-reservoirs-and-wells-in-northern-and-north-eastern-poland-using-lamp-real-time-pcr-and-nested-pcr
#17
Anna Lass, Beata Szostakowska, Krzysztof Korzeniewski, Panagiotis Karanis
Giardia intestinalis is a protozoan parasite, transmitted to humans and animals by the faecal-oral route, mainly through contaminated water and food. Knowledge about the distribution of this parasite in surface water in Poland is fragmentary and incomplete. Accordingly, 36 environmental water samples taken from surface water reservoirs and wells were collected in Pomerania and Warmia-Masuria provinces, Poland. The 50 L samples were filtered and subsequently analysed with three molecular detection methods: loop-mediated isothermal amplification (LAMP), real-time polymerase chain reaction (real-time PCR) and nested PCR...
October 2017: Journal of Water and Health
https://www.readbyqxmd.com/read/29040061/validation-of-a-novel-biomechanical-test-bench-for-the-knee-joint-with-six-degrees-of-freedom
#18
Christian H Heinrichs, Dominik Knierzinger, Hannes Stofferin, Werner Schmoelz
A novel biomechanical test bench has been developed for in-vitro evaluation of the knee joint. The test bench allows the kinematics of the knee joint to be studied in all six degrees of freedom. Flexion-extension knee movements are induced by quadriceps and hamstring muscle forces simulated by five pneumatic cylinders. The kinematics of the knee and the actively applied muscle forces are measured simultaneously. The aim of this study was to validate the sensitivity and reproducibility of this novel test bench...
October 17, 2017: Biomedizinische Technik. Biomedical Engineering
https://www.readbyqxmd.com/read/29040037/influence-of-risk-category-and-screening-round-on-the-performance-of-an-mr-imaging-and-mammography-screening-program-in-carriers-of-the-brca-mutation-and-other-women-at-increased-risk
#19
Suzan Vreemann, Albert Gubern-Mérida, Margrethe S Schlooz-Vries, Peter Bult, Carla H van Gils, Nicoline Hoogerbrugge, Nico Karssemeijer, Ritse M Mann
Purpose To evaluate the real-life performance of a breast cancer screening program for women with different categories of increased breast cancer risk with multiple follow-up rounds in an academic hospital with a large screening population. Materials and Methods Screening examinations (magnetic resonance [MR] imaging and mammography) for women at increased breast cancer risk (January 1, 2003, to January 1, 2014) were evaluated. Risk category, age, recall for workup of screening-detected abnormalities, biopsy, and histopathologic diagnosis were recorded...
October 16, 2017: Radiology
https://www.readbyqxmd.com/read/29040022/added-value-of-a-single-fast-20-second-deep-inspiration-breath-hold-acquisition-in-fdg-pet-ct-in-the-assessment-of-lung-nodules
#20
Nicolas Balamoutoff, Benjamin Serrano, Florent Hugonnet, Nicolas Garnier, Benoît Paulmier, Marc Faraggi
Purpose To compare the accuracy of a single 20-second deep-inspiration breath hold (DIBH) in fluorodeoxyglucose (FDG) positron emission tomography (PET)/computed tomography (CT) to that with conventional free-breathing (FB) whole-body PET/CT for the assessment, characterization, and quantification of lung lesions in terms of the blurring effect of respiratory motion. Materials and Methods Institutional review board approval was obtained, and the requirement to obtain informed consent was waived. A preclinical study was performed in a test population of 19 patients to evaluate the feasibility and consistency of DIBH techniques compared with phase-based respiratory gating (PBRG)...
October 17, 2017: Radiology
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