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https://www.readbyqxmd.com/read/28534214/repeatability-of-68-ga-dkfz11-psma-pet-scans-for-detecting-prostate-specific-membrane-antigen-positive-prostate-cancer
#1
Joseph R Osborne, Teja M Kalidindi, Blesida J Punzalan, Kishore Gangangari, Daniel E Spratt, Wolfgang A Weber, Steven M Larson, Naga Vara Kishore Pillarsetty
PURPOSE: We studied the effect of varying specific activity of [(68)Ga]DKFZ-PSMA11 ([(68)Ga]DP11) on repeated imaging of prostate-specific membrane antigen-positive (PSMA+) xenograft tumors. PROCEDURES: Athymic nude mice bearing PC3-PIP (PSMA+) and PC3 (PSMA-) bilateral flank tumors were assessed to study intra- and inter-day repeatability of [(68)Ga]DP11 imaging in mice administered [(68)Ga]DP11 or [(67)Ga]DP11 (as a dilution tracer) using imaging and biodistribution studies...
May 22, 2017: Molecular Imaging and Biology: MIB: the Official Publication of the Academy of Molecular Imaging
https://www.readbyqxmd.com/read/28532145/mini-photobioreactors-for-in-vivo-real-time-characterization-and-evolutionary-tuning-of-bacterial-optogenetic-circuit
#2
Hsinkai Wang, Ya-Tang Yang
The current standard protocols for characterizing the optogenetic circuit of bacterial cells using flow cytometry in light tubes and light exposure of culture plates are tedious, labor-intensive, and cumbersome. In this work, we engineer a bioreactor with working volume of ~10 mL for in vivo real-time optogenetic characterization of E. coli with a CcaS-CcaR light-sensing system. In the bioreactor, optical density measurements, reporter protein fluorescence detection, and light input stimuli are provided by four light-emitting diode sources and two photodetectors...
May 22, 2017: ACS Synthetic Biology
https://www.readbyqxmd.com/read/28531553/hiv-1-viral-load-measurement-in-venous-blood-and-fingerprick-blood-using-abbott-realtime-hiv-1-dbs-assay
#3
Ning Tang, Vihanga Pahalawatta, Andrea Frank, Zowie Bagley, Raquel Viana, John Lampinen, Gregor Leckie, Shihai Huang, Klara Abravaya, Carole L Wallis
BACKGROUND: HIV RNA suppression is a key indicator for monitoring success of antiretroviral therapy. From a logistical perspective, viral load (VL) testing using Dried Blood Spots (DBS) is a promising alternative to plasma based VL testing in resource-limited settings. OBJECTIVES: To evaluate the analytical and clinical performance of the Abbott RealTime HIV-1 assay using a fully automated one-spot DBS sample protocol. STUDY DESIGN: Limit of detection (LOD), linearity, lower limit of quantitation (LLQ), upper limit of quantitation (ULQ), and precision were determined using serial dilutions of HIV-1 Virology Quality Assurance stock (VQA Rush University), or HIV-1-containing armored RNA, made in venous blood...
May 13, 2017: Journal of Clinical Virology: the Official Publication of the Pan American Society for Clinical Virology
https://www.readbyqxmd.com/read/28525340/detection-of-bordetella-avium-by-taqman-real-time-pcr-in-tracheal-swabs-from-wildlife-birds
#4
T Stenzel, D Pestka, B Tykałowski, M Śmiałek, A Koncicki, A Bancerz-Kisiel
Bordetella avium, the causing agent of bordetellosis, a highly contagious infection of the respiratory tract in young poultry, causes significant losses in poultry farming throughout the world. Wildlife birds can be a reservoir of various pathogens that infect farm animals. For this reason the studies were conducted to estimate the prevalence of Bordetella avium in wildlife birds in Poland. Tracheal swab samples were collected from 650 birds representing 27 species. The bacterial DNA was isolated directly from the swabs and screened for Bordetella avium by TaqMan real-time PCR...
March 28, 2017: Polish Journal of Veterinary Sciences
https://www.readbyqxmd.com/read/28516055/antimicrobial-and-enzymatic-activity-of-actinomycetes-isolated-from-soils-of-coastal-islands
#5
Ivana Charousová, Juraj Medo, Eva Halenárová, Soňa Javoreková
Microbiological investigation of unexplored ecosystems is crucial for discovering of antibiotic producing actinomycetes. The present study was conducted to determine antimicrobial activity and identify the most active strains. Actinomycetes were isolated using the spread plate technique following by serial dilution of samples on starch casein agar. The screening method consists of primary and secondary testing. The most active isolates were identified based on molecular and cultural methods. 42 out of 66 isolates displayed antimicrobial potential...
April 2017: Journal of Advanced Pharmaceutical Technology & Research
https://www.readbyqxmd.com/read/28513808/magnetic-nanoparticle-enhanced-pcr-for-the-detection-and-identification-of-staphylococcus-aureus-and-salmonella-enteritidis
#6
Dimitra Houhoula, Joseph Papaparaskevas, Katerina Zatsou, Nikolaos Nikolaras, Hanan I Malkawi, Marie-Paule Mingenot-Leclercq, Spyros Konteles, Stamatis Koussisis, Athanassios Tsakris, Ekatherina Charvalos
This paper evaluated magnetic nanoparticle-enhanced PCR for the detection and identification of Staphylococcus aureus and Salmonella enteritidis. Two different types of magnetic nanoparticles designated MPIO (iron concentration 2.5 mg/ml, size 1 μm) and NP (iron concentration 8.7 mg/ml, size 60 nm), both conjugated with S. aureus or S. enteritidis antibodies were evaluated as an enrichment procedure for PCR-detection of the pathogens in Trypticase Soy Broth, milk, blood and meat broth. Bacterial suspensions (1...
May 17, 2017: New Microbiologica
https://www.readbyqxmd.com/read/28512675/selection-and-characterization-of-an-anaerobic-microbial-consortium-with-high-adaptation-to-crude-glycerol-for-1-3-propanediol-production
#7
Jin-Jie Zhou, Jun-Tao Shen, Li-Li Jiang, Ya-Qin Sun, Ying Mu, Zhi-Long Xiu
Crude glycerol is an ideal feedstock for bioproduction of 1,3-propanediol (1,3-PDO) while pure culture always shows low substrate tolerance and limited productivity. In this study, an anaerobic microbial consortium for conversion of crude glycerol was selected and its 1,3-PDO production capacity was evaluated. The consortium was obtained from anaerobic activated sludge by 19 serial transfers and mainly consisted of 94.64% Clostridiaceae and 4.47% Peptostreptococcaceae. The consortium adapted well with high glycerol concentration of 120 g/L as well as wide substrate concentration fluctuation from 15 to 80 g/L, producing 60...
May 16, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28503777/determination-of-threshold-concentrations-of-plant-pollens-in-intradermal-testing-using-fluorescein-in-clinically-healthy-nonallergic-cats
#8
Fiona M Scholz, Amanda K Burrows, Craig E Griffin, Russell Muse
BACKGROUND: Currently the same allergen concentrations for canine intradermal testing (IDT) are recommended for feline IDT. Feline skin reactions are subtle and more difficult to read than canine reactions. This difference may be due to suboptimal allergen concentrations used for IDT in cats. HYPOTHESIS/OBJECTIVES: To determine the irritant threshold concentration (ITC) of 16 pollen allergens using serial dilutions of allergen and intravenous fluorescein. The hypothesis tested was that feline IDT currently is performed at suboptimal allergen concentrations for pollens...
May 14, 2017: Veterinary Dermatology
https://www.readbyqxmd.com/read/28496951/can-aptameric-ligands-specific-to-plasma-coagulation-factor-vii-bind-the-recombinant-form-with-high-affinity-affinity-measurement-by-fluorescence-method
#9
Maryam Tabarzad, Marzieh Jafari, Nastaran Nafissi-Varcheh
BACKGROUND: Among diverse protein purification systems, affinity chromatography is the most attractive one in the purification process of coagulation factors. Coagulation factor VII is a plasma serine protease that has a significant role in natural human hemostasis and its recombinant form such as AryoSeven(™), has been applied in clinical treatment of bleeding disorders. Immunoaffinity chromatography is the purification method of choice that is currently applied in the development of coagulation factor VIIa products...
April 2017: Avicenna Journal of Medical Biotechnology
https://www.readbyqxmd.com/read/28483269/multiplex-profiling-identifies-distinct-local-and-systemic-alterations-during-intraperitoneal-chemotherapy-for-ovarian-cancer-an-nrg-oncology-gynecologic-oncology-group-study
#10
Shannon Grabosch, George Tseng, Robert P Edwards, Heather A Lankes, Kathleen Moore, Kunle Odunsi, Anda Vlad, Tianzhou Ma, Mary Strange, Joan Brozick, Amit Lugade, Angela Omilian, Wiam Bshara, Ashley R Stuckey, Joan L Walker, Michael Birrer
OBJECTIVES: Ovarian cancer leads to abdominal carcinomatosis and late stage (III/IV) diagnosis in 75% of patients. Three randomized phase III trials have demonstrated that intraperitoneal (IP) chemotherapy improves outcomes in epithelial ovarian cancer. While IP treatment is validated by clinical trials, there is a poor understanding of the mechanism(s) leading to the survival advantage other than the increased concentration of cytotoxic drugs within the tumor microenvironment. A better understanding of this process through analysis of dynamic biomarkers should promote novel approaches that may enhance tumor clearance...
May 5, 2017: Gynecologic Oncology
https://www.readbyqxmd.com/read/28480504/the-feasibility-of-gamma-radiation-sterilization-for-decellularized-tracheal-grafts
#11
Christopher M Johnson, DeHuang Guo, Stephanie Ryals, Gregory N Postma, Paul M Weinberger
OBJECTIVES/HYPOTHESIS: The most promising stem cell-derived tracheal transplantation approach is dependent upon the use of decellularized tracheal grafts. It has been assumed that a sterilization step, such as gamma radiation, would damage the delicate extracellular matrix of the graft, thus rendering it less viable for cellular repopulation, although this has not been thoroughly investigated. STUDY DESIGN: Laboratory-based comparative analysis. METHODS: Fifteen murine tracheas of strain C57/B-6 mice were obtained...
May 7, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28480460/optimized-droplet-digital-cfu-assay-ddcfu-provides-precise-quantification-of-bacteria-over-a-dynamic-range-of-6%C3%A2-logs-and-beyond
#12
O Scheler, N Pacocha, P R Debski, A Ruszczak, T S Kaminski, P Garstecki
Standard digital assays need a large number of compartments for precise quantification of a sample over a broad dynamic range. We address this issue with an optimized droplet digital approach that uses a drastically reduced number of compartments for quantification. We generate serial logarithmic dilutions of an initial bacterial sample as an array of microliter-sized droplet plugs. In a subsequent step, these droplets are split into libraries of nanoliter droplets and pooled together for incubation and analysis...
May 8, 2017: Lab on a Chip
https://www.readbyqxmd.com/read/28476319/simultaneous-determination-of-components-with-wide-polarity-and-content-ranges-in-cistanche-tubulosa-using-serially-coupled-reverse-phase-hydrophilic-interaction-chromatography-tandem-mass-spectrometry
#13
Yu Yan, Qingqing Song, Xiaojia Chen, Jun Li, Peng Li, Yitao Wang, Tongxiang Liu, Yuelin Song, Pengfei Tu
To meet the demands from plant physiologists and pharmacognosists, sustainable efforts are being devoted by the analytical chemists from all over the world to search an approach being capable of simultaneously monitoring primary along with secondary metabolites. The key technical bottlenecks currently lie at affording satisfactory chromatographic and spectrometric performances for both hydrophilic and hydrophobic substances that span a great content range. Herein, reverse phase liquid chromatography was directly coupled with hydrophilic interaction chromatography, namely RPLC-HILIC, to integrate their merits, whereas dilution pumps were employed to tackle the mismatching for the mobile phase between them...
June 9, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28472470/effect-of-metarhizium-anisopliae-ascomycete-cypermethrin-and-d-limonene-alone-and-combined-on-larval-mortality-of-rhipicephalus-sanguineus-acari-ixodidae
#14
Omar Francisco Prado-Rebolledo, Jaime Molina-Ochoa, Roberto Lezama-Gutiérrez, Luis Jorge García-Márquez, Yureida B Minchaca-Llerenas, Eduardo Morales-Barrera, Guillermo Tellez, Billy Hargis, Steven R Skoda, John E Foster
The effect of the fungus Metarhizium anisopliae Ma14 strain, D-limonene, and cypermethrin, alone and combined, on the mortality of Rhipicephalus sanguineus Latreille larvae was evaluated. Eight separate groups with 25 tick larvae were inoculated with the fungus, cypermethrin, and D-limonene, and four groups were used as untreated controls. The groups were inoculated with serial dilutions of each treatment material: for example, conidial concentrations were 1 × 101, 1 × 102, 1 × 103, 1 × 104, 1 × 105, 1 × 106, 1 × 107, and 1 × 108...
May 4, 2017: Journal of Medical Entomology
https://www.readbyqxmd.com/read/28465161/assessment-of-elisa-as-endpoint-in-neuronal-cell-based-assay-for-bont-detection-using-hipsc-derived-neurons
#15
Sabine Pellett, William H Tepp, Eric A Johnson, Dorothea Sesardic
INTRODUCTION: Botulinum neurotoxins (BoNTs), the causative agents of botulism, are widely used as powerful bio-pharmaceuticals to treat neuro-muscular disorders. Due to the high potency and potential lethality of BoNTs, careful monitoring of the biologic activity of BoNT-based pharmaceuticals is required to ensure safe usage. For decades, the only approved method for potency determination of pharmaceutical BoNTs was the mouse bioassay (MBA), but in recent years improvements in cell-assay technologies have enabled MBA replacement by cell-based assays for specific product evaluations...
April 29, 2017: Journal of Pharmacological and Toxicological Methods
https://www.readbyqxmd.com/read/28457848/evaluation-of-methylene-blue-as-photosensitizer-in-promastigotes-of-leishmania-major-and-leishmania-braziliensis
#16
Juliana Guerra Pinto, Jaciara Fagundes, André Henrique Correia Pereira, Josane Mittmann, Leandro José Raniero, Juliana Ferreira-Strixino
The cutaneous leishmaniasis is caused by the protozoan of the genus Leishmania. It is considered by WHO as a public health issue and a neglected disease, which affects rural workers and it is also a risk to travelers in endemic areas. The conventional treatment is toxic and leads to severe side effects. The photodynamic therapy has been studied as an alternative treatment to cutaneous leishmaniasis. This study aimed to evaluate the methylene blue internalization and the impact of the PDT in the viability and morphology of Leishmania major and Leishmania braziliensis promastigote in culture medium...
April 27, 2017: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/28449808/validation-of-quantitative-pcr-based-assays-for-detection-of-gene-copy-number-aberrations-in-formalin-fixed-paraffin-embedded-solid-tumor-samples
#17
Meenakshi Mehrotra, Rajyalakshmi Luthra, Ronald Abraham, Bal Mukund Mishra, Shumaila Virani, Hui Chen, Mark J Routbort, Keyur P Patel, L Jeffrey Medeiros, Rajesh R Singh
Gene copy number changes are important somatic alterations in cancers. A number of high throughput methods, such as next generation sequencing, are capable of detecting copy number aberrations, but their use can be challenging and cost prohibitive for screening a small number of markers. Furthermore, detection of CNAs by high throughput platforms needs confirmation by an orthogonal technique, especially in cases with low level CNAs. Here, we have validated TaqMan based quantitative PCR (qPCR) assays to detect CNAs in genes of high clinical importance in formalin-fixed, paraffin-embedded (FFPE) samples...
April 2017: Cancer Genetics
https://www.readbyqxmd.com/read/28444979/false-negative-single-antigen-bead-assay-is-it-always-an-effect-of-prozone
#18
Dharmendra Jain, Jui Choudhuri, Rajni Chauhan, Pranav Dorwal, Deepak Sharma, Aseem K Tiwari, Vimarsh Raina
BACKGROUND: Bead based flow cytometry and Luminex play a major role in identification of alloantibodies in renal transplant work-up. Strong sensitization events may lead to prozone phenomenon that can affect single antigen bead (SAB) assay and result in false negativity. However, this can also be due to high titer of other blocking antibodies. While methods like, heat inactivation, C1 inhibitor, Ethylene diamine tetra-acetic-acid and Dithio threitol treatment can remove interfering antibodies of complement and IgM, these methods are not optimal if false negativity is due to prozone effect, which is high titer of antibodies alone...
April 26, 2017: Journal of Clinical Laboratory Analysis
https://www.readbyqxmd.com/read/28441441/a-novel-multiplexed-probe-based-quantitative-pcr-assay-for-the-soybean-root-and-stem-rot-pathogen-phytophthora-sojae-utilizes-its-transposable-element
#19
James S Haudenshield, Jeong Y Song, Glen L Hartman
Phytophthora root rot of soybean [Glycine max (L.) Merr.] is caused by the oomycete Phytophthora sojae (Kaufm. & Gerd.). P. sojae has a narrow host range, consisting primarily of soybean, and it is a serious pathogen worldwide. It exists in root and stem tissues as mycelium, wherein it can form oospores which subsequently germinate to release motile, infectious zoospores. Molecular assays detecting DNA of P. sojae are useful in disease diagnostics, and for determining the presence of the organism in host tissues, soils, and runoff or ponded water from potentially infested fields...
2017: PloS One
https://www.readbyqxmd.com/read/28433811/rapid-and-sensitive-detection-of-salmonid-alphavirus-using-taqman-real-time-pcr
#20
Wen Shi, Aochen Song, Shuai Gao, Yuting Wang, Lijie Tang, Yigang Xu, Tong Ren, Yijing Li, Min Liu
Salmonid alphavirus (SAV) infection has led to the spread of salmon pancreas disease (PD) and sleeping disease (SD) to salmonids in several countries in Europe, resulting in tremendous economic losses to the fish farming industry. Recently, with increases in the fish import trade, many countries in which SAV has been unreported, such as China, may be seriously threatened by these diseases. It is therefore necessary to develop efficient detection methods for the prevention and diagnosis of SAV infection. In this study, a rapid and sensitive TaqMan real-time PCR method was established and assessed for this purpose...
April 19, 2017: Molecular and Cellular Probes
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