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https://www.readbyqxmd.com/read/29691960/genexpert-mtb-rif-for-rapid-diagnosis-and-rifampin-resistance-detection-of-endobronchial-tuberculosis
#1
Qin Zhang, Qing Zhang, Bing-Qi Sun, Chang Liu, An-Na Su, Xiao-Han Wang, Na Liu, Juan Zhang, Jian Kang, Gang Hou
BACKGROUND AND OBJECTIVE: Delayed diagnosis and treatment of tuberculosis (TB) contribute to poor outcomes, especially for endobronchial TB (EBTB), which typically leads to tracheobronchial stenosis. Finding rapid and accurate diagnostic tools for EBTB is crucial. GeneXpert Mycobacterium tuberculosis (MTB)/rifampin (RIF) was recommended by the World Health Organization (WHO) as a standard molecular biological diagnostic technique for MTB. The aim of this study was to evaluate the efficacy of GeneXpert MTB/RIF for diagnosing EBTB and for evaluating RIF resistance...
April 24, 2018: Respirology: Official Journal of the Asian Pacific Society of Respirology
https://www.readbyqxmd.com/read/29691915/statistical-mixture-design-investigation-for-extraction-and-quantitation-of-aporphine-alkaloids-from-the-leaves-of-unonopsis-duckei-r-e-fr-by-hplc-ms-ms
#2
Pablo R N Rocha, Flávio A de Freitas, Célio F F Angolini, Lucas-Smith F Vasconcelos, Alaíde L B da Silva, Emmanoel V Costa, Felipe M A da Silva, Marcos N Eberlin, Giovana A Bataglion, Patrícia K Soares, Hector H F Koolen
INTRODUCTION: Alkaloids-derived drugs are a billionaire world-market and several phytochemical investigations aim the identification of new sources and/or structures. Thus, improving the way of extracting and methods to quantify them are of utmost importance. OBJECTIVE: To quantify isoquinoline-derived alkaloids in Unonopsis duckei R.E. Fr. through a new validated high-performance liquid chromatography with tandem mass spectrometry (HPLC-MS/MS) method in combination with a statistical mixture design that aimed a proper direct extraction of these compounds from leaves...
April 24, 2018: Phytochemical Analysis: PCA
https://www.readbyqxmd.com/read/29691899/droplet-digital-pcr-for-bcr-abl-p210-detecting-of-cml-a-high-sensitive-method-of-the-minimal-residual-disease-disease-progression
#3
Wen-Jun Wang, Chao-Feng Zheng, Zhuang Liu, Yan-Hong Tan, Xiu-Hua Chen, Bin-Liang Zhao, Guo-Xia Li, Zhi-Fang Xu, Fang-Gang Ren, Yao-Fang Zhang, Jian-Mei Chang, Hong-Wei Wang
OBJECTIVE: The present study intended to establish a droplet digital PCR (dd-PCR) for monitoring minimal residual disease (MRD) in patients with BCR/ABL (P210)-positive CML, thereby achieving deep-level monitoring of tumor load and determining the efficacy for guided clinically individualized treatment. METHODS: Using dd-PCR and RT-qPCR, two cell suspensions were obtained from K562 cells and normal peripheral blood mononuclear cells by gradient dilution and were measured at the cellular level...
April 25, 2018: European Journal of Haematology
https://www.readbyqxmd.com/read/29691896/genome-wide-interaction-with-the-insulin-secretion-locus-mtnr1b-reveals-cmip-as-a-novel-type-2-diabetes-susceptibility-gene-in-african-americans
#4
Jacob M Keaton, Chuan Gao, Meijian Guan, Jacklyn N Hellwege, Nicholette D Palmer, James S Pankow, Myriam Fornage, James G Wilson, Adolfo Correa, Laura J Rasmussen-Torvik, Jerome I Rotter, Yii-Der I Chen, Kent D Taylor, Stephen S Rich, Lynne E Wagenknecht, Barry I Freedman, Maggie C Y Ng, Donald W Bowden
Although type 2 diabetes (T2D) results from metabolic defects in insulin secretion and insulin sensitivity, most of the genetic risk loci identified to date relates to insulin secretion. We reported that T2D loci influencing insulin sensitivity may be identified through interactions with insulin secretion loci, thereby leading to T2D. Here, we hypothesize that joint testing of variant main effects and interaction effects with an insulin secretion locus increases power to identify genetic interactions leading to T2D...
April 24, 2018: Genetic Epidemiology
https://www.readbyqxmd.com/read/29691860/outbreaks-of-diarrhoea-winter-scours-in-weaned-merino-sheep-in-south-eastern-australia
#5
K J Stanger, H McGregor, Jwa Larsen
OBJECTIVE: Identify the cause of outbreaks of diarrhoea during winter that are not attributable to gastrointestinal nematodes in weaned Merino sheep in the high rainfall regions of south-eastern Australia and determine the efficacy of antimicrobials used to treat this syndrome. METHODS: We investigated 45 outbreaks on 24 farms. Faecal samples from affected animals were cultured for Yersinia, Campylobacter and Salmonella spp. Risk factors, including rainfall, temperature and worm egg count (WEC), were assessed...
May 2018: Australian Veterinary Journal
https://www.readbyqxmd.com/read/29691672/generic-anti-peg-antibody-assay-on-proterixbio-s-formerly-bioscale-vibe-platform-shows-poor-reproducibility
#6
Shannon D Chilewski, Julie Shields, Johanna R Mora, Heather Myler
PEGylation is a modification commonly used to increase the half-life of therapeutic proteins. The strategy for immunogenicity testing of these compounds should include methods to detect both anti-protein and anti-PEG antibodies. We previously reported a method for the detection of anti-PEG antibodies using ProterixBio's (formerly BioScale) acoustic membrane microparticle (AMMP) technology. Our initial method development work showed the assay was capable of detecting antibodies in human serum with a sensitivity of 1 μg/mL with good reproducibility (CV < 7%)...
April 24, 2018: AAPS Journal
https://www.readbyqxmd.com/read/29691665/electrochemical-immunoassay-for-the-carcinoembryonic-antigen-based-on-the-use-of-a-glassy-carbon-electrode-modified-with-an-octahedral-cu-2-o-gold-nanocomposite-and-staphylococcal-protein-for-signal-amplification
#7
Zhen Qin, Wei Xu, Shuai Chen, Jun Chen, Jing Fu Qiu, Chao Rui Li
The authors describe an electrochemical immunoassay for ultrasensitive direct determination of the carcinoembryonic antigen (CEA). A nanocomposite consisting of octahedral Cu2O nanocrystals covered with gold nanoparticles was utilized to modify a glassy carbon electrode which gives a strongly enhanced chronoamperometric signal for H2 O2 which is used as an electrochemical probe. The morphology and elemental composition of the the nanocomposite was studied by field emission scanning electron microscopy and energy dispersive X-ray spectroscopy...
April 24, 2018: Mikrochimica Acta
https://www.readbyqxmd.com/read/29691660/molecularly-imprinted-electrochemical-aptasensor-for-the-attomolar-detection-of-bisphenol-a
#8
Ali A Ensafi, Maryam Amini, Behzad Rezaei
Gold nanoparticles (AuNPs) were electrodeposited on the surface of a glassy carbon electrode (GCE) and then treated with a mixture of a thiolated DNA sequence (p-63; with high affinity for bisphenol A) and free bisphenol A (BPÀ). Pyrrole was then electropolymerizaed on the surface of the GCE to entrap the BPA@p-63 complex. BPA is then extracted with acetic acid solution to obtain MIP cavities where the embedded DNA sequence acts as the binding site for BPA. Scanning electron microscopy, electrochemical impedance spectroscopy, and cyclic voltammetry were employed to characterize the surface of the modified GCE...
April 24, 2018: Mikrochimica Acta
https://www.readbyqxmd.com/read/29691646/retrospective-validation-of-the-laparoscopic-icg-sln-mapping-in-patients-with-grade-3-endometrial-cancer
#9
Andrea Papadia, Maria Luisa Gasparri, Anda P Radan, Chantal A L Stämpfli, Tilman T Rau, Michael D Mueller
PURPOSE: To evaluate the sensitivity, negative predictive value (NPV) and false-negative (FN) rate of the near infrared (NIR) indocyanine green (ICG) sentinel lymph node (SLN) mapping in patients with poorly differentiated endometrial cancer who have undergone a full pelvic and para-aortic lymphadenectomy after SLN mapping. METHODS: We performed a retrospective analysis of patients with endometrial cancer undergoing a laparoscopic NIR-ICG SLN mapping followed by a systematic pelvic and para-aortic lymphadenectomy...
April 24, 2018: Journal of Cancer Research and Clinical Oncology
https://www.readbyqxmd.com/read/29691601/development-of-an-online-spe-uhplc-ms-ms-method-for-the-multiresidue-analysis-of-the-17-compounds-from-the-eu-watch-list
#10
Lucia Gusmaroli, Sara Insa, Mira Petrovic
During the last decades, the quality of aquatic ecosystems has been threatened by increasing levels of pollutions, caused by the discharge of man-made chemicals, both via accidental release of pollutants as well as a consequence of the constant outflow of inadequately treated wastewater effluents. For this reason, the European Union is updating its legislations with the aim of limiting the release of emerging contaminants. The Commission Implementing Decision (EU) 2015/495 published in March 2015 drafts a "Watch list" of compounds to be monitored Europe-wide...
April 24, 2018: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/29691597/preoperative-digital-subtraction-angiography-in-incidental-unruptured-intracranial-aneurysms-how-much-is-too-much
#11
Moriz Herzberg, Robert Forbrig, Christian Schichor, Hartmut Brückmann, Franziska Dorn
PURPOSE: Digital subtraction angiography (DSA) is deemed necessary to precisely visualize intracranial aneurysms and define individual treatment strategies. In patients with unruptured intracranial aneurysms (UIA) who were diagnosed by MRI, a four-vessel DSA is usually performed to detect additional aneurysms. This study aimed to evaluate whether the evaluation of all vessels beyond the aneurysm-harboring artery is really necessary. MATERIAL AND METHODS: Patients with an UIA that was detected on MRA (TOF/ceMRA) were prospectively included...
April 24, 2018: Clinical Neuroradiology
https://www.readbyqxmd.com/read/29691583/-establishment-and-characterization-of-a549-tumor-monoclonal-cell-line-with-uchl1-gene-deletion
#12
Yu Zhang, Yan Shi, Di Song, Xuan Zhang, Lin Yu, Ya-Ping He, Zhao-Gui Sun
The purpose of this study was to investigate the effects of ubiquitin C-terminal hydrolase-L1 (UCHL1) on non-small cell lung cancer cell line A549. UCHL1 gene knockout A549 cell line was constructed by CRISPR-CAS9 gene editing technique. The mRNA and protein levels of UCHL1 were examined by RT-PCR and Western blot, respectively. Cell proliferation and cycles were analyzed by CCK-8 method and flow cytometry, respectively. The sensitivity of A549 cells to cisplatin was detected by CCK-8 method. Migration ability of A549 cells was detected by scratch assay and Transwell test, and p-Erk expression level was assessed by Western blot...
April 25, 2018: Sheng Li Xue Bao: [Acta Physiologica Sinica]
https://www.readbyqxmd.com/read/29691377/colonic-motor-response-to-wakening-is-blunted-in-slow-transit-constipation-as-detected-by-wireless-motility-capsule
#13
Brian Surjanhata, Kenneth Barshop, Kyle Staller, Jack Semler, Laurence Guay, Braden Kuo
BACKGROUND: Chronic constipation may be categorized as normal transit (NTC), slow transit (STC), or outlet obstruction. Colonic wake response is a relative increase in colonic motility upon awakening. Colonic manometry studies have demonstrated attenuated wake response in STC. We sought to evaluate wake response among healthy (H), NTC, and STC patients using wireless motility capsule (WMC). METHODS: A retrospective study of WMC data from a multicenter clinical trial and a tertiary gastroenterology clinic was performed...
April 25, 2018: Clinical and Translational Gastroenterology
https://www.readbyqxmd.com/read/29691363/detection-of-circulating-mycobacterium-tuberculosis-specific-dna-by-droplet-digital-pcr-for-vaccine-evaluation-in-challenged-monkeys-and-tb-diagnosis
#14
Neng Song, Yang Tan, Lingyun Zhang, Wei Luo, Qing Guan, Ming-Zhe Yan, Ruiqi Zuo, Weixiang Liu, Feng-Ling Luo, Xiao-Lian Zhang
Mycobacterium tuberculosis (M. tb) is emerging as a more serious pathogen due to the increased multidrug-resistant TB and co-infection of human immunodeficiency virus (HIV). The development of an effective and sensitive detection method is urgently needed for bacterial load evaluation in vaccine development, early TB diagnosis, and TB treatment. Droplet digital polymerase chain reaction (ddPCR) is a newly developed sensitive PCR method for the absolute quantification of nucleic acid concentrations. Here, we used ddPCR to quantify the circulating virulent M...
April 24, 2018: Emerging Microbes & Infections
https://www.readbyqxmd.com/read/29691297/validation-of-a-plasma-based-comprehensive-cancer-genotyping-assay-utilizing-orthogonal-tissue-and-plasma-based-methodologies
#15
Justin I Odegaard, John J Vincent, Stefanie Mortimer, James V Vowles, Bryan C Ulrich, Kimberly C Banks, Stephen R Fairclough, Oliver A Zill, Marcin Sikora, Reza Mokhtari, Diana Abdueva, Rebecca J Nagy, Christine E Lee, Lesli A Kiedrowski, Cloud P Paweletz, Helmy Eltoukhy, Richard B Lanman, Darya I Chudova, AmirAli Talasaz
PURPOSE: Liquid biopsies are powerful tools that enable non-invasive genotyping of advanced solid tumors; however, comprehensive, structured validation studies employing validated orthogonal comparator methods are lacking. EXPERIMENTAL DESIGN: Analytical validation was conducted according to established principles and guidelines. Blood-to-blood clinical validation comprised blinded external comparison to clinical digital droplet PCR across 222 consecutive biomarker-positive clinical samples...
April 24, 2018: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/29691284/a-modified-algorithm-for-critical-congenital-heart-disease-screening-using-pulse-oximetry
#16
Christina L Diller, Michael S Kelleman, Kenneth G Kupke, Sharon C Quary, Lazaros K Kochilas, Matthew E Oster
: media-1vid110.1542/5727212367001PEDS-VA_2017-4065 Video Abstract OBJECTIVES: Determine the performance of the American Academy of Pediatrics (AAP) critical congenital heart disease (CCHD) newborn screening algorithm and the impact of an alternative algorithm. METHODS: Screening was performed on term infants without a known CCHD diagnosis at or near 24 hours of age at a tertiary birth hospital by using the AAP algorithm from 2013 to 2016. Retrospective review from the birth hospital and the area's sole pediatric cardiac center identified true- and false-positives and true- and false-negatives...
April 24, 2018: Pediatrics
https://www.readbyqxmd.com/read/29691193/cloning-and-high-level-expression-of-thermus-thermophilus-reca-in-e-coli-purification-and-novel-use-in-hbv-diagnostics
#17
Sudarson Sundarrajan, Sneha Rao, Sriram Padmanabhan
We studied the role of Thermus thermophilus Recombinase A (RecA) in enhancing the PCR signals of DNA viruses such as Hepatitis B virus (HBV). The RecA gene of a thermophilic eubacterial strain, T. thermophilus, was cloned and hyperexpressed in Escherichia coli. The recombinant RecA protein was purified using a single heat treatment step without the use of any chromatography steps, and the purified protein (>95%) was found to be active. The purified RecA could enhance the polymerase chain reaction (PCR) signals of HBV and improve the detection limit of the HBV diagnosis by real time PCR...
April 12, 2018: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/29691130/detection-of-daily-postures-and-walking-modalities-using-a-single-chest-mounted-tri-axial-accelerometer
#18
Milad Nazarahari, Hossein Rouhani
This study presents a novel method for the detection and classification of a wide range of physical activities, including standing, sitting, lying, level walking, and walking upstairs and downstairs using a single chest-mounted accelerometer. The trunk inclination angle and variation of the gravitational component of the accelerometer recording were used for detection and classification of postural transitions and walking modalities. In addition, biomechanical features of each transition were used to reject false detections...
April 21, 2018: Medical Engineering & Physics
https://www.readbyqxmd.com/read/29690921/pathogen-detection-in-the-crispr-cas-era
#19
Dipali G Sashital
CRISPR-Cas systems have provided revolutionary tools for genome editing. The discovery of Cas proteins with alternative activities has now enabled sensitive and robust tools for detecting nucleic acids. Recent reports harnessing these new CRISPR-Cas technologies display their potential for providing low-cost and practical diagnostic tools for pathogen and disease detection.
April 24, 2018: Genome Medicine
https://www.readbyqxmd.com/read/29690890/a-novel-field-based-molecular-assay-to-detect-validated-artemisinin-resistant-k13-mutants
#20
Laurence Vachot-Ganée, Nimol Khim, Alexandra Iannello, Eric Legrand, Saorin Kim, Rotha Eam, Chanra Khean, Malen Ken, Elizabeth Ashley, Kyaw Myo Tun, Mehul Dhorda, François Nosten, Issa Mahamat Souleymane, Sophie Blein, Alexandre Pachot, Frédéric Ariey, Karine Kaiser, Didier Ménard
BACKGROUND: Given the risk of artemisinin resistance spreading from the Greater Mekong sub-region, prospective monitoring in sub-Saharan Africa should be expedited. Molecular biology techniques used for monitoring rely on the detection of k13 validated mutants by using PCR and Sanger sequencing approach, usually not available in malaria endemic areas. METHODS: A semi-automated workflow based on the easyMAG® platform and the Argene Solution® (bioMérieux, Marcy l'Etoile, France) as a field-based surveillance tool operable at national level was developed in four steps...
April 24, 2018: Malaria Journal
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