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https://www.readbyqxmd.com/read/29387788/an-optical-authentication-system-based-on-imaging-of-excitation-selected-lanthanide-luminescence
#1
Miguel R Carro-Temboury, Riikka Arppe, Tom Vosch, Thomas Just Sørensen
Secure data encryption relies heavily on one-way functions, and copy protection relies on features that are difficult to reproduce. We present an optical authentication system based on lanthanide luminescence from physical one-way functions or physical unclonable functions (PUFs). They cannot be reproduced and thus enable unbreakable encryption. Further, PUFs will prevent counterfeiting if tags with unique PUFs are grafted onto products. We have developed an authentication system that comprises a hardware reader, image analysis, and authentication software and physical keys that we demonstrate as an anticounterfeiting system...
January 2018: Science Advances
https://www.readbyqxmd.com/read/29382972/development-and-application-of-a-droplet-digital-polymerase-chain-reaction-ddpcr-for-detection-and-investigation-of-african-swine-fever-virus
#2
Xulong Wu, Lu Xiao, Hua Lin, Shijie Chen, Miao Yang, Wei An, Yin Wang, Zexiao Yang, Xueping Yao, Zizhong Tang
The aim of this study was to develop a droplet digital polymerase chain reaction (ddPCR) method to detect African swine fever virus (ASFV). The methods of ASFV real-time PCR and ddPCR were established and optimal reaction conditions were confirmed. Each method was evaluated for linearity, limit of detection, and specificity. The results indicated that ASFV ddPCR had a high degree of linearity (R2 ≥ 0.998) and specificity. The detection limit was 10 copies/reaction, which was approximately a 10-fold greater sensitivity than real-time PCR...
January 2018: Canadian Journal of Veterinary Research, Revue Canadienne de Recherche Vétérinaire
https://www.readbyqxmd.com/read/29377168/technical-note-feasibility-study-of-titanium-markers-in-choroidal-melanoma-localization-for-proton-beam-radiation-therapy
#3
Inder K Daftari, Jeanne M Quivey, Jennifer S Chang, Kavita K Mishra
PURPOSE: The purpose of this study is to explore the feasibility of the use of titanium fiducial markers to minimize the metallic artifact seen with tantalum markers which causes significant distortion on post-operative orbital CT scans. METHOD: We designed and constructed the titanium markers in the shop of Crocker Nuclear Laboratory, UC Davis, Ca. The markers were placed on an eyeball phantom. The eyeball was inserted into the Rando phantom in the orbital space...
January 29, 2018: Medical Physics
https://www.readbyqxmd.com/read/29366632/prognostic-and-therapeutic-implications-of-circulating-androgen-receptor-gene-copy-number-in-prostate-cancer-patients-using-droplet-digital-polymerase-chain-reaction
#4
Sarah Buelens, Tom Claeys, Bert Dhondt, Filip Poelaert, Matthijs Vynck, Nurten Yigit, Olivier Thas, Piet Ost, Jo Vandesompele, Nicolaas Lumen, Candy Kumps
BACKGROUND: Resistance mechanisms in the androgen receptor (AR) signaling pathway remain key drivers in the progression to castration-resistant prostate cancer (CRPC) and relapse under antihormonal therapy. MATERIALS AND METHODS: We evaluated the circulating AR gene copy number (CN) gain using droplet digital polymerase chain reaction in 21 control and 91 prostate cancer serum samples and its prognostic and therapeutic implications in prostate cancer. RESULTS: In CRPC, AR CN gain was associated with faster progression to CRPC (P = ...
December 29, 2017: Clinical Genitourinary Cancer
https://www.readbyqxmd.com/read/29365086/genetic-landscape-of-ultra-stable-chronic-lymphocytic-leukemia-patients
#5
S Raponi, I Del Giudice, M Marinelli, J Wang, L Cafforio, C Ilari, A Piciocchi, M Messina, S Bonina, S Tavolaro, M Bordyuh, P Mariglia, N Peragine, F R Mauro, S Chiaretti, S Molica, M Gentile, A Visentin, L Trentin, G M Rigolin, A Cuneo, F Diop, D Rossi, G Gaidano, A Guarini, R Rabadan, R Foà
Background: Chronic lymphocytic leukemia (CLL) has a heterogeneous clinical course. Beside patients requiring immediate treatment, others show an initial indolent phase followed by progression and others do not progress for decades. The latter two subgroups usually display mutated IGHV genes and a favorable FISH profile. Patients and Methods: Patients with absence of disease progression for over 10 years (11-30) from diagnosis were defined as ultra-stable CLL (US-CLL)...
January 22, 2018: Annals of Oncology: Official Journal of the European Society for Medical Oncology
https://www.readbyqxmd.com/read/29359453/strong-xenoprotective-function-by-single-copy-transgenes-placed-sequentially-at-a-permissive-locus
#6
Beate Rieblinger, Konrad Fischer, Alexander Kind, Benedikt S Saller, Wiebke Baars, Marion Schuster, Lelia Wolf-van Buerck, Andrea Schäffler, Tatiana Flisikowska, Mayuko Kurome, Valeri Zakhartchenko, Barbara Kessler, Krzysztof Flisikowski, Eckhard Wolf, Jochen Seissler, Reinhard Schwinzer, Angelika Schnieke
BACKGROUND: Multiple xenoprotective transgenes are best grouped at a single locus to avoid segregation during breeding and simplify production of donor animals. METHODS: We used transgene stacking to place a human CD55 transgene adjacent to a human heme oxygenase 1 construct at the porcine ROSA26 locus. A transgenic pig was analyzed by PCR, RT-PCR, droplet digital PCR, immunohistochemistry, immunofluorescence, and flow cytometry. Resistance to complement-mediated cell lysis and caspase 3/7 activation were determined in vitro...
January 23, 2018: Xenotransplantation
https://www.readbyqxmd.com/read/29356420/copy-number-variation-of-a-protease-gene-of-daphnia-its-role-in-population-tolerance
#7
Anke Schwarzenberger, Nathan R Keith, Craig E Jackson, Eric Von Elert
Copy number variation (CNV) of genes coding for certain enzymes has been shown to be responsible for adaptation of arthropods to anthropogenic toxins. Natural toxins produced by cyanobacteria in freshwater ecosystems, that is, protease inhibitors (PIs), have been demonstrated to increase in frequency over the last decades due to eutrophication and global warming. These PIs inhibit digestive proteases of Daphnia, the major herbivore of phytoplankton and cyanobacteria. The adjustment of isoforms, differences in gene expression, and activity of gut proteases determine tolerance to dietary PIs in single Daphnia genotypes...
February 2017: Journal of Experimental Zoology. Part A, Ecological and Integrative Physiology
https://www.readbyqxmd.com/read/29352043/prognostic-implications-of-multiplex-detection-of-kras-mutations-in-cell-free-dna-from-patients-with-pancreatic-ductal-adenocarcinoma
#8
Min Kyeong Kim, Sang Myung Woo, Boram Park, Kyong-Ah Yoon, Yun-Hee Kim, Jungnam Joo, Woo Jin Lee, Sung-Sik Han, Sang-Jae Park, Sun-Young Kong
BACKGROUND: Cell-free DNA (cfDNA) is known to provide potential biomarkers for predicting clinical outcome, but its value in pancreatic ductal adenocarcinoma (PDAC) has not been fully evaluated. The aim of this study was to evaluate the clinical applicability of quantitative analysis of multiplex KRAS mutations in cell-free DNA from patients with PDAC. METHODS: A total of 106 patients with PDAC were enrolled in this prospective study. The concentration and fraction of KRAS mutations were determined through multiplex detection of KRAS mutations in plasma samples by use of a droplet digital PCR kit (Bio-Rad)...
January 19, 2018: Clinical Chemistry
https://www.readbyqxmd.com/read/29351293/fibroblast-growth-factor-receptor-1-amplification-in-laryngeal-squamous-cell-carcinoma
#9
Jesus Monico, Brandon Miller, Luminita Rezeanu, Warren May, Donna C Sullivan
Fibroblast growth factor receptor 1 (FGFR1) has been noted to be amplified in a variety of squamous cell carcinomas (SCCa) of the head, neck, and lung and increased copy number (CN) is a predictor of poor outcomes. FGFR1 is a therapeutic target for lung SCCa and inhibition therapy is currently in clinical trials. Absolute quantification of FGFR1 from formalin fixed paraffin embedded (FFPE) tissue of laryngeal SCCa was examined in this retrospective study. A droplet digital polymerase chain reaction (ddPCR) was used for absolute quantitation of the FGFR1 gene CN...
2018: PloS One
https://www.readbyqxmd.com/read/29341374/validation-of-the-digital-pcr-system-in-tyrosine-kinase-inhibitor-resistant-egfr-mutant-non-small-cell-lung-cancer
#10
Katsuhiro Masago, Shiro Fujita, Akito Hata, Chiyuki Okuda, Yuko Yoshizumi, Reiko Kaji, Nobuyuki Katakami, Yukio Hirata, Yasushi Yatabe
The aim of this study was to compare the accuracy of the QuantStudio 3D Digital polymerase chain reaction (dPCR) system and a PCR-based next generation sequencing (NGS) system for detecting a secondary mutation in the epidermal growth factor receptor (EGFR) gene T790M in non-small cell lung cancer (NSCLC) patients previously diagnosed with EGFR-activating mutations. Twenty-five patients with NSCLC previously treated with EGFR-TKIs were examined. The patients were treated daily with either erlotinib or gefitinib...
January 17, 2018: Pathology International
https://www.readbyqxmd.com/read/29339441/allele-specific-droplet-digital-pcr-combined-with-a-next-generation-sequencing-based-algorithm-for-diagnostic-copy-number-analysis-in-genes-with-high-homology-proof-of-concept-using-stereocilin
#11
Sami S Amr, Elissa Murphy, Elizabeth Duffy, Rojeen Niazi, Jorune Balciuniene, Minjie Luo, Heidi L Rehm, Ahmad N Abou Tayoun
BACKGROUND: Copy number variants (CNVs) can substantially contribute to the pathogenic variant spectrum in several disease genes. The detection of this type of variant is complicated in genes with high homology to other genomic sequences, yet such genomics regions are more likely to lead to CNVs, making it critical to address detection in these settings. METHODS: We developed a copy number analysis approach for high homology genes/regions that consisted of next-generation sequencing (NGS)-based dosage analysis accompanied by allele-specific droplet digital PCR (ddPCR) confirmatory testing...
January 16, 2018: Clinical Chemistry
https://www.readbyqxmd.com/read/29334548/plasma-and-intracellular-pharmacokinetics-of-tenofovir-in-patients-switched-from-tenofovir-disoproxil-fumarate-to-tenofovir-alafenamide
#12
Anthony T Podany, Sara H Bares, Joshua Havens, Ravi Dyavar Shetty, Jennifer O'neill, Sarah Lee, Courtney V Fletcher, Susan Swindells, Kimberly K Scarsi
OBJECTIVES: The aim of the study was to compare the intra-individual plasma and intracellular peripheral blood mononuclear cell (PBMC) pharmacokinetics (PK) of tenofovir (TFV) and its intracellular metabolite, tenofovir-diphosphate (TFV-DP) in patients switched from a fixed dose combination (FDC) tablet of tenofovir disoproxil fumarate (TDF)/ emtricitabine (FTC)/ elvitegravir (EVG)/ cobicistat (COBI) to a FDC containing tenofovir alafenamide (TAF)/FTC/EVG/COBI. DESIGN: A single arm, prospective, non-randomized, cross-over, PK study in patients receiving a TDF-containing regimen (TDF 300 mg/ FTC 200 mg/ EVG 150 mg/ COBI 150 mg) switched to a TAF-containing FDC regimen (TAF 10 mg/ FTC 200 mg/ EVG 150 mg/ COBI 150 mg)...
January 13, 2018: AIDS
https://www.readbyqxmd.com/read/29328041/von-willebrand-factor-immunohistochemical-staining-quantitative-optical-density-parameters-in-the-endothelium-and-fibrinoid-of-the-placenta-during-secundines-inflammation-and-concomitant-iron-deficiency-anemia-in-gravidas
#13
V Ilika, I Davydenko
The aim of the research was to set the optical density quantitative parameters of the von Willebrand factor immunohistochemical staining (vWF) in the endothelium and fibrinoid of the placenta during the secundines inflammation concomitant with iron deficiency anemia in gravidas. The total number of 198 placentas was studied. The immunohistochemical technique was performed using the visualization of the primary antibodies to vWF with a diaminobenzidine dye polymer system. The optical density of the histochemical staining was measured by means of computer microdensitometry after the digital copies of the images had been obtained...
December 2017: Georgian Medical News
https://www.readbyqxmd.com/read/29327201/allele-specific-biased-expression-of-the-cntn6-gene-in-ips-cell-derived-neurons-from-a-patient-with-intellectual-disability-and-3p26-3-microduplication-involving-the-cntn6-gene
#14
Maria M Gridina, Natalia M Matveeva, Veniamin S Fishman, Aleksei G Menzorov, Helen A Kizilova, Nikolay A Beregovoy, Igor I Kovrigin, Inna E Pristyazhnyuk, Igor P Oscorbin, Maxim L Filipenko, Anna A Kashevarova, Nikolay A Skryabin, Tatyana V Nikitina, Elena A Sazhenova, Ludmila P Nazarenko, Igor N Lebedev, Oleg L Serov
Copy number variations (CNVs) of the human CNTN6 gene caused by megabase-scale microdeletions or microduplications in the 3p26.3 region are often the cause of neurodevelopmental disorders, including intellectual disability and developmental delay. Surprisingly, patients with different copy numbers of this gene display notable overlapping of neuropsychiatric symptoms. The complexity of the study of human neuropathologies is associated with the inaccessibility of brain material. This problem can be overcome through the use of reprogramming technologies that permit the generation of induced pluripotent stem (iPS) cells from fibroblasts and their subsequent in vitro differentiation into neurons...
January 11, 2018: Molecular Neurobiology
https://www.readbyqxmd.com/read/29323170/droplet-digital-pcr-based-egfr-mutation-detection-with-an-internal-quality-control-index-to-determine-the-quality-of-dna
#15
Sung-Su Kim, Hyun-Jeung Choi, Jin Ju Kim, M Sun Kim, In-Seon Lee, Bohyun Byun, Lina Jia, Myung Ryurl Oh, Youngho Moon, Sarah Park, Joon-Seok Choi, Seoung Wan Chae, Byung-Ho Nam, Jin-Soo Kim, Jihun Kim, Byung Soh Min, Jae Seok Lee, Jae-Kyung Won, Soo Youn Cho, Yoon-La Choi, Young Kee Shin
In clinical translational research and molecular in vitro diagnostics, a major challenge in the detection of genetic mutations is overcoming artefactual results caused by the low-quality of formalin-fixed paraffin-embedded tissue (FFPET)-derived DNA (FFPET-DNA). Here, we propose the use of an 'internal quality control (iQC) index' as a criterion for judging the minimum quality of DNA for PCR-based analyses. In a pre-clinical study comparing the results from droplet digital PCR-based EGFR mutation test (ddEGFR test) and qPCR-based EGFR mutation test (cobas EGFR test), iQC index ≥ 0...
January 11, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29322764/rapid-veterinary-diagnosis-of-bovine-reproductive-infectious-diseases-from-semen-using-paper-origami-dna-microfluidics
#16
Zhugen Yang, Gaolian Xu, Julien Reboud, Syed Atif Ali, Gurpreet Kaur, John McGiven, Nongthombam Boby, Praveen Gupta, Pallab Chaudhuri, Jonathan Mark Cooper
The health and well-being of cattle is a significant concern for global agricultural output. In dairy production within low and middle income countries (LMICs), there is a significant biosensing challenge in detecting sexually transmitted infection (STI) pathogens during animal husbandry, due in part to difficulties associated with the limited infrastructure for veterinary medicine. Here we demonstrate low-cost, multiplexed and sample-to-answer paper-origami tests for the detection of three bovine infectious reproductive diseases in semen samples, collected at a test site in rural India...
January 11, 2018: ACS Sensors
https://www.readbyqxmd.com/read/29304224/in-vitro-differentiation-of-human-oocyte-like-cells-from-oogonial-stem-cells-single-cell-isolation-and-molecular-characterization
#17
Erica Silvestris, Paola Cafforio, Stella D'Oronzo, Claudia Felici, Franco Silvestris, Giuseppe Loverro
STUDY QUESTION: Are the large cells derived from cultured DEAD box polypeptide 4 (DDX4)-positive oogonial stem cells (OSCs), isolated from the ovarian cortex of non-menopausal and menopausal women, oocyte-like cells? SUMMARY ANSWER: Under appropriate culture conditions, DDX4-positive OSCs from non-menopausal and menopausal women differentiate into large haploid oocyte-like cells expressing the major oocyte markers growth differentiation factor 9 (GDF-9) and synaptonemal complex protein 3 (SYCP3) and then enter meiosis...
January 3, 2018: Human Reproduction
https://www.readbyqxmd.com/read/29303179/capillary-based-integrated-digital-pcr-in-picoliter-droplets
#18
Jinyu Chen, Zhaofeng Luo, Lin Li, Jinlong He, Luoquan Li, Jianwei Zhu, Ping Wu, Liqun He
The droplet digital polymerase chain reaction (ddPCR) is becoming more and more popular in diagnostic applications in academia and industry. In commercially available ddPCR systems, after they have been made by a generator, the droplets have to be transferred manually to modules for amplification and detection. In practice, some of the droplets (∼10%) are lost during manual transfer, leading to underestimation of the targets. In addition, the droplets are also at risk of cross-contamination during transfer...
January 5, 2018: Lab on a Chip
https://www.readbyqxmd.com/read/29289300/novel-near-infrared-spectrum-analysis-tool-synergy-adaptive-moving-window-model-based-on-immune-clone-algorithm
#19
Shenghao Wang, Yuyan Zhang, Fuyi Cao, Zhenying Pei, Xuewei Gao, Xu Zhang, Yong Zhao
This paper presents a novel spectrum analysis tool named synergy adaptive moving window modeling based on immune clone algorithm (SA-MWM-ICA) considering the tedious and inconvenient labor involved in the selection of pre-processing methods and spectral variables by prior experience. In this work, immune clone algorithm is first introduced into the spectrum analysis field as a new optimization strategy, covering the shortage of the relative traditional methods. Based on the working principle of the human immune system, the performance of the quantitative model is regarded as antigen, and a special vector corresponding to the above mentioned antigen is regarded as antibody...
February 13, 2018: Analytica Chimica Acta
https://www.readbyqxmd.com/read/29288495/pan-cancer-insights-from-the-cancer-genome-atlas-the-pathologist-s-perspective
#20
REVIEW
Lee A D Cooper, Elizabeth G Demicco, Joel H Saltz, Reid T Powell, Arvind Rao, Alexander J Lazar
The Cancer Genome Atlas (TCGA) represents one of several international consortia dedicated to performing comprehensive genomic and epigenomic analyses of selected tumor types to advance understanding of disease and provide an open-access resource for worldwide cancer research. Thirty-three tumor types (selected by histology or tissue of origin, to include both common and rare diseases), comprising over 11,000 specimens were subjected to DNA sequencing, copy number and methylation analysis, and transcriptomic, proteomic, and histologic evaluation...
December 30, 2017: Journal of Pathology
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