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https://www.readbyqxmd.com/read/28441340/selection-characterization-and-interaction-studies-of-a-dna-aptamer-for-the-detection-of-bifidobacterium-bifidum
#1
Lujun Hu, Linlin Wang, Wenwei Lu, Jianxin Zhao, Hao Zhang, Wei Chen
A whole-bacterium-based SELEX (Systematic Evolution of Ligands by Exponential Enrichment) procedure was adopted in this study for the selection of an ssDNA aptamer that binds to Bifidobacterium bifidum. After 12 rounds of selection targeted against B. bifidum, 30 sequences were obtained and divided into seven families according to primary sequence homology and similarity of secondary structure. Four FAM (fluorescein amidite) labeled aptamer sequences from different families were selected for further characterization by flow cytometric analysis...
April 25, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28436517/real-time-measurement-of-the-intracellular-ph-of-yeast-cells-during-glucose-metabolism-using-ratiometric-fluorescent-nanosensors
#2
Mohamed M Elsutohy, Veeren M Chauhan, Robert Markus, Mohammed Aref Kyyaly, Saul J B Tendler, Jonathan W Aylott
Intracellular pH is a key parameter that influences many biochemical and metabolic pathways that can also be used as an indirect marker to monitor metabolic and intracellular processes. Herein, we utilise ratiometric fluorescent pH-sensitive nanosensors with an extended dynamic pH range to measure the intracellular pH of yeast (Saccharomyces cerevisiae) during glucose metabolism in real-time. Ratiometric fluorescent pH-sensitive nanosensors consisting of a polyacrylamide nanoparticle matrix covalently linked to two pH-sensitive fluorophores, Oregon green (OG) and 5(6)carboxyfluorescein (FAM), and a reference pH-insensitive fluorophore, 5(6)carboxytetramethylrhodamine (TAMRA), were synthesised...
April 24, 2017: Nanoscale
https://www.readbyqxmd.com/read/28430524/mirna-related-polymorphisms-in-mir-423-rs6505162-and-pex6-rs1129186-and-risk-of-esophageal-squamous-cell-carcinoma-in-an-iranian-cohort
#3
Ziba Nariman-Saleh-Fam, Milad Bastami, Mohammad Hossein Somi, Farkhondeh Behjati, Yaser Mansoori, Abdolreza Daraei, Zahra Saadatian, Lida Nariman-Saleh-Fam, Habibollah Mahmoodzadeh, Yashar Makhdoumi, Fatemeh Varshoee Tabrizi, Bahador Ebrahimi-Sharif, Azam Hezarian, Shahnaz Naghashi, Mohammad Reza Abbaszadegan, Javad Tavakkoly-Bazzaz
AIMS: Iran is located in the Asian esophageal cancer belt. It is a high-risk region for esophageal squamous cell carcinoma (ESCC). The extent to which genetic components, especially variants within miRNAs or their binding sites, contribute to risk of ESCC in the region is not yet fully understood. Herein, tests were done on an Iranian cohort to evaluate the association of miRNA-related polymorphisms in miR-423 (rs6505162) and peroxisomal biogenesis factor 6 (PEX6) (rs1129186 within a miR-149-5p-binding site) with risk of ESCC risk...
April 21, 2017: Genetic Testing and Molecular Biomarkers
https://www.readbyqxmd.com/read/28416893/letter-to-the-editor-are-the-doors-opened-to-a-genetic-based-algorithm-for-personalized-resistance-training
#4
G Monnerat-Cahli, D Paulúcio, R S Moura Neto, R Silva, Fams Pompeu, B Budowle, C G Santos
No abstract text is available yet for this article.
March 2017: Biology of Sport
https://www.readbyqxmd.com/read/28411826/a-novel-fluorescent-biosensor-for-adenosine-triphosphate-detection-based-on-the-polydopamine-nanospheres-integrating-with-enzymatic-recycling-amplification
#5
Xiaoting Ji, Bingqing Yi, Yujuan Xu, Yanan Zhao, Hua Zhong, Caifeng Ding
Based on the protective performance of polydopamine nanospheres (PDANSs) for DNA against nuclease digestion and the specific recognition characteristic of aptamer, we have developed an enzymatic recycling signal amplification method for highly sensitive and selective detection of adenosine triphosphate (ATP). Fluorescence measurements were carried out to verify the DNA polymerase and exonuclease III (Exo III) assisted target recycling process and fluorescence signal amplification. In the absence of the ATP, initially, the signal DNA-PDANSs complex was in the "off" state due to the efficient fluorescence quenching of 6-carboxyfluorescein (FAM) adjacent to the surface of PDANSs...
July 1, 2017: Talanta
https://www.readbyqxmd.com/read/28405751/developmental-validation-of-a-6-dye-str-kit-with-27-loci
#6
Shuanglin Li, Ling Chen, Yanfang Wang, Quyi Xu, Hong Liu, Yue Li, Chao Liu
The EX27 System is a 6-dye (i.e., FAM, HEX, TAMAR, ROX, VIG, and SIZ-500) kit that combines the 24 autosomal STR loci (i.e., D3S1358, D13S317, D7S820, D16S539, D1S1656, Penta E, TPOX, TH01, D2S1338, CSF1PO, Penta D, D10S1248, D19S433, vWA, D21S11, D18S51, D6S1043, D8S1179, D5S818, D12S391, FGA, D22S1045, D2S441, SE33) with a Y-STR locus (DYS391), an Indel site (YIndel) and Amelogenin, which is designed to amplify DNA from extracts as well as direct amplification from substrates. The new system contains most of the widely used autosomal STR loci around the world and is sensitive to the male component in mixtures and is more accurate in gender determination owing to the DYS391 and YIndel...
April 12, 2017: International Journal of Legal Medicine
https://www.readbyqxmd.com/read/28402516/surgical-performance-in-minimally-invasive-surgery-plus-recombinant-tissue-plasminogen-activator-for-intracerebral-hemorrhage-evacuation-phase-iii-clinical-trial
#7
Maged D Fam, Daniel Hanley, Agnieszka Stadnik, Hussein A Zeineddine, Romuald Girard, Michael Jesselson, Ying Cao, Lynn Money, Nichol McBee, Amanda J Bistran-Hall, W Andrew Mould, Karen Lane, Paul J Camarata, Mario Zuccarello, Issam A Awad
BACKGROUND: Minimally invasive thrombolytic evacuation of intracerebral hematoma is being investigated in the ongoing phase III clinical trial of Minimally Invasive Surgery plus recombinant Tissue plasminogen activator for Intracerebral hemorrhage Evacuation (MISTIE III). OBJECTIVES: To assess the accuracy of catheter placement and efficacy of hematoma evacuation in relation to surgical approach and surgeon experience. METHODS: We performed a trial midpoint interim assessment of 123 cases that underwent the surgical procedure...
April 10, 2017: Neurosurgery
https://www.readbyqxmd.com/read/28400706/hypersensitivity-reactions-due-to-black-henna-tattoos-and-their-components-are-the-clinical-pictures-related-to-the-immune-pathomechanism
#8
REVIEW
Gianfranco Calogiuri, Elisabetta Di Leo, Lavjay Butani, Stefano Pizzimenti, Cristoforo Incorvaia, Luigi Macchia, Eustachio Nettis
Hypersensitivity to para-phenylenediamine (PPD) and related compounds induced by temporary black henna tattoos has become a serious health problem worldwide. Different patterns of sensitization with various clinical aspects are described in literature due to PPD associated to henna tattoo and these manifestations are likely correlated with the immunological and dermatological pathomechanisms involved. Henna is the Persian name of the plant Lawsonia inermis, Fam. Lythraceae. It is a woody shrub that grow in regions of North Africa, South Asia, India and Sri Lanka...
2017: Clinical and Molecular Allergy: CMA
https://www.readbyqxmd.com/read/28393136/development-of-%C3%AE-hairpin-peptides-for-the-measurement-of-scf-family-e3-ligase-activity-in-vitro-via-ornithine-ubiquitination
#9
Kaiulani M Houston, Adam T Melvin, Gregery S Woss, Effrat L Fayer, Marcey L Waters, Nancy L Allbritton
Regulation of the ubiquitin-proteasome system (UPS) to treat select types of cancer has become a popular area of drug discovery research. The FDA approval of proteasome inhibitors Bortezomib and Carfilzomib in the treatment of multiple myeloma has led to an increased need for chemical reporters capable of detecting and quantifying protein ubiquitination and the activity of members of the UPS including E3 ubiquitin ligases and the proteasome in the tumor cells of the patients. One limitation of peptide-based reporters is their rapid degradation in the cellular environment by cytosolic peptidases...
March 31, 2017: ACS Omega
https://www.readbyqxmd.com/read/28390405/fam-face-sg-a-score-for-risk-stratification-of-frequent-hospital-admitters
#10
Lian Leng Low, Nan Liu, Kheng Hock Lee, Marcus Eng Hock Ong, Sijia Wang, Xuan Jing, Julian Thumboo
BACKGROUND: An accurate risk stratification tool is critical in identifying patients who are at high risk of frequent hospital readmissions. While 30-day hospital readmissions have been widely studied, there is increasing interest in identifying potential high-cost users or frequent hospital admitters. In this study, we aimed to derive and validate a risk stratification tool to predict frequent hospital admitters. METHODS: We conducted a retrospective cohort study using the readily available clinical and administrative data from the electronic health records of a tertiary hospital in Singapore...
April 8, 2017: BMC Medical Informatics and Decision Making
https://www.readbyqxmd.com/read/28385183/vitamin-d-receptor-gene-polymorphisms-are-associated-with-multiple-sclerosis-in-mexican-adults
#11
Víctor Hugo Bermúdez-Morales, Geny Fierros, Roberto Lopez Lopez, Gaby Martínez-Nava, Mario Flores-Aldana, José Flores-Rivera, Carlos Hernández-Girón
BACKGROUND: Multiple sclerosis (MS) is the most prevalent autoimmune inflammatory demyelinating disease of the central nervous system (CNS) in young adults. More than 50 genomic regions have been associated with MS susceptibility. Due the important immune-modulating properties of Vitamin D, Vitamin D receptor (VDR) gene polymorphisms - which interfere with the actions of Vitamin D- could be related to increased risk of MS. METHODS: We studied 120 patients fulfilling the McDonald criteria for MS (81 females and 39 males) and 180 healthy unrelated controls, nested in a case-Control study, and were recruited from the National Institute of Neurology and Neurosurgery, Manuel Velasco Suárez in Mexico City...
May 15, 2017: Journal of Neuroimmunology
https://www.readbyqxmd.com/read/28379647/awareness-and-knowledge-of-glaucoma-in-central-india-a-hospital-based-study
#12
Prafulla K Maharana, Vaishali G Rai, Rajesh Pattebahadur, Shipra Singhi, Ashish K Chauhan
PURPOSE: To assess the awareness and knowledge of glaucoma among people attending the ophthalmology outpatient department at a tertiary care hospital in central India. DESIGN: A prospective observational study. METHODS: A questionnaire-based study was conducted, involving persons aged 18 and above attending the ophthalmology outpatient department from October 2014 to September 2015. Data on awareness and knowledge of glaucoma was collected through a face-to-face interview...
March 29, 2017: Asia-Pacific Journal of Ophthalmology
https://www.readbyqxmd.com/read/28336788/transcatheter-treatment-of-severe-tricuspid-regurgitation-with-the-edge-to-edge-mitraclip-technique
#13
Georg Nickenig, Marek Kowalski, Jörg Hausleiter, Daniel Braun, Joachim Schofer, Ermela Yzeiraj, Volker Rudolph, Kai Friedrichs, Francesco Maisano, Maurizio Taramasso, Neil P Fam, Giovanni Bianchi, Francesco Bedogni, Paolo Denti, Ottavio Alfieri, Azeem Latib, Antonio Colombo, Christoph Hammerstingl, Robert Schueler
Background -Current surgical and medical treatment options for severe tricuspid regurgitation (TR) are limited and additional interventional approaches are required. In the present observational study, the safety and feasibility of transcatheter repair of chronic severe TR with the MitraClip system were evaluated. In addition, the effects on clinical symptoms were assessed. Methods -Patients with heart failure symptoms and severe TR on optimal medical treatment were treated with the MitraClip system. Safety, defined as periprocedural adverse events such as death, myocardial infarction, stroke, or cardiac tamponade, and feasibility, defined as successful implantation of one or more MitraClip devices and reduction of TR by at least one grade, were evaluated before discharge and after 30 days...
March 23, 2017: Circulation
https://www.readbyqxmd.com/read/28327822/impact-of-roux-en-y-gastric-bypass-surgery-rygb-on-metabolic-syndrome-components-and-on-the-use-of-associated-drugs-in-obese-patients
#14
Vilma Maria Junges, Jarbas Marinho Cavalheiro, Eliana Franzoi Fam, Vera Elizabeth Closs, João Feliz Moraes, Maria Gabriela Gottlieb
BACKGROUND: The prevalence of obesity and metabolic syndrome is increasing worldwide and both behavior modification and drug therapy have low adherence. Gastric bypass has shown effective results in both reducing weight and improving comorbidities. OBJECTIVE: To evaluate the impact of Roux-en-Y Gastric Bypass Surgery (RYGB) on both metabolic syndrome components and the use of associated drugs in obese patients. METHODS: Historical cohort of patients subjected to Roux-en-Y Gastric Bypass Surgery (RYGB) between January 2007 and March 2014 in a private clinic...
March 16, 2017: Arquivos de Gastroenterologia
https://www.readbyqxmd.com/read/28315214/detection-of-food-allergens-by-taqman-real-time-pcr-methodology
#15
Aina García, Raquel Madrid, Teresa García, Rosario Martín, Isabel González
Real-time PCR (polymerase chain reaction) has shown to be a very effective technology for the detection of food allergens. The protocol described herein consists on a real-time PCR assay targeting the plant ITS (Internal Transcribed Spacer) region, using species-specific primers and hydrolysis probes (Taqman) dual labeled with a reporter fluorophore at the 5' end (6-carboxyfluorescein, FAM) and a quencher fluorophore at the 3' end (Blackberry, BBQ). The species-specific real-time PCR systems (primers/probe) described in this work allowed the detection of different nuts (peanut, hazelnut, pistachio, almond, cashew, macadamia, walnut and pecan), common allergens present in commercial food products, with a detection limit of 0...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28306242/excision-repair-initiated-enzyme-assisted-bicyclic-cascade-signal-amplification-for-ultrasensitive-detection-of-uracil-dna-glycosylase
#16
Li-Juan Wang, Ming Ren, Qianyi Zhang, Bo Tang, Chun-Yang Zhang
Uracil-DNA glycosylase (UDG) is an important base excision repair (BER) enzyme responsible for the repair of uracil-induced DNA lesion and the maintenance of genomic integrity, while the aberrant expression of UDG is associated with a variety of cancers. Thus, the accurate detection of UDG activity is essential to biomedical research and clinical diagnosis. Here, we develop a fluorescent method for ultrasensitive detection of UDG activity using excision repair-initiated enzyme-assisted bicyclic cascade signal amplification...
March 29, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28301132/nuclear-shell-biopolymers-initiated-by-telomere-elongation-for-individual-cancer-cell-imaging-and-drug-delivery
#17
Zhen Zhang, Yuting Jiao, Mengting Zhu, Shusheng Zhang
Here, we propose a strategy for unique nuclear-shell biopolymers initiated by telomere elongation for telomerase activity detection and precise drug delivery to individual cancer cells. Telomerase-triggered DNA rolling-circle amplification (RCA) is used to assemble nuclear-shell biopolymers with signal molecules for selective cancer cell recognition and efficient drug delivery to targeted individual cells. This strategy not only should allow the creation of clustered 5-carboxyfluorescein (FAM)-fluorescence spots in response to human-telomerase activity in individual cancer cells but also could efficiently deliver drugs to reduce the undesired death of healthy cells...
March 24, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28299702/optical-and-electrochemical-aptasensors-for-sensitive-detection-of-streptomycin-in-blood-serum-and-milk
#18
Mohammad Ramezani, Khalil Abnous, Seyed Mohammad Taghdisi
Detection and quantitation of antibiotic residues in blood serum and foodstuffs are in great demand. We have developed aptasensors for detection of streptomycin using electrochemical and optical methods. In the first method, an electrochemical aptasensor was developed for sensitive and selective detection of streptomycin, based on combination of exonuclease I (Exo I), complementary strand of aptamer (CS), arch shaped structure of aptamer (Apt)-CS conjugate, and gold electrode. The designed electrochemical aptasensor exhibited high selectivity toward streptomycin with a limit of detection (LOD) as low as 11...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28285167/the-investigation-of-the-truncated-mbta-gene-within-the-mycobactin-cluster-of-mycobacterium-avium-subspecies-paratuberculosis-as-a-novel-diagnostic-marker-for-real-time-pcr
#19
Marcel de Kruijf, Aidan Coffey, Jim O'Mahony
The inability of Mycobacterium avium subspecies paratuberculosis (MAP) to produce endogenous mycobactin in-vitro is most likely due to the presence of a truncated mbtA gene within the mycobactin cluster of MAP. The main goal of this study was to investigate this unique mbtA truncation as a potential novel PCR diagnostic marker for MAP. Novel primers were designed that were located within the truncated region and the contiguous MAP2179 gene. Primers were evaluated against non-MAP isolates and no amplicons were generated...
March 8, 2017: Journal of Microbiological Methods
https://www.readbyqxmd.com/read/28285035/development-of-aflatoxin-b1-aptasensor-based-on-wide-range-fluorescence-detection-using-graphene-oxide-quencher
#20
Minyoung Joo, Seung Hoon Baek, Seon Ah Cheon, Hyang Sook Chun, Sung-Wook Choi, Tae Jung Park
Aflatoxin B1 (AFB1) is a carcinogenic substance produced by fungi of genus Aspergillus, especially Aspergillus flavus. Few nanograms of AFB1 that permeated through the skin is sufficient to cause liver cancer and stunted growth. In this study, a rapid aptamer-based assay for AFB1 was developed using the fluorescence quenching property of graphene oxide (GO) and a fluorescein amidite (FAM)-modified aptamer specific to AFB1. The aptamer, modified with the fluorescence dye FAM on its 5'-end, was used as a probe...
March 6, 2017: Colloids and Surfaces. B, Biointerfaces
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