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https://read.qxmd.com/read/30776704/genetic-diversity-of-streptococcus-mutans-serotype-c-isolated-from-white-spot-and-cavitated-caries-lesions-from-schoolchildren
#1
Ramiro Javier Rincón-Rodríguez, Monica Tatiana Parada-Sanchez, Claudia María Bedoya-Correa, David Arboleda-Toro
OBJECTIVE: To determine the genetic diversity of Streptococcus mutans (S. mutans) serotype c isolated from white spot and cavitated caries lesions of schoolchildren. METHODS: S. mutans isolates were obtained and identify by Polymerase Chain Reaction (PCR) from 28 schoolchildren. A total of 92 S. mutans isolates, identified as serotype c by PCR, were analyzed by pulsed field gel electrophoresis after digestion of genomic DNA with SmaI enzyme. 62 isolates were obtained from white spot and cavitated caries lesions of schoolchildren that presented both lesions simultaneously and 30 isolates were from saliva and biofilm samples of schoolchildren without dental caries...
February 8, 2019: Archives of Oral Biology
https://read.qxmd.com/read/30776556/novel-lawsone-containing-ruthenium-ii-complexes-synthesis-characterization-and-anticancer-activity-on-2d-and-3d-spheroid-models-of-prostate-cancer-cells
#2
Rone Aparecido De Grandis, Patrick Wellington da Silva Dos Santos, Katia Mara de Oliveira, Ana Rita Tomazela Machado, Alexandre Ferro Aissa, Alzir Azevedo Batista, Lusânia Maria Greggi Antunes, Fernando Rogério Pavan
This study describes a series of newly synthesized phosphine/diimine ruthenium complexes containing the lawsone as bioligand with enhanced cytotoxicity against different cancer cells, and apoptosis induction in prostatic cancer cells DU-145. The complexes [Ru(law)(N-N)2 ]PF6 where N-N is 2,2'-bipyridine (1) or 1,10-phenanthroline (2) and [Ru(law)(dppm)(N-N)]PF6 , where dppm means bis(diphenylphosphino)methane, N-N is 2,2'-bipyridine (3) or 1,10-phenanthroline (4), and law is lawsone, were synthesized and fully characterized by elemental analysis, molar conductivity, NMR, UV-vis, IR spectroscopies and cyclic voltammetry...
February 8, 2019: Bioorganic Chemistry
https://read.qxmd.com/read/30775895/interference-rendering-capillary-electrophoresis-of-serum-proteins-uninterpretable
#3
Asmâa Biaz, Jean Uwingabiye, Elmostafa Benaissa, Emmanuel Millbank Owusu, Samira El Machtani Idrissi, Abdellah Dami, Zohra Ouzzif, Sanae Bouhsain
BACKGROUND: The authors report a clinical case where biological interference rendered the electrophoretic trace of serum proteins obtained by capillary electrophoresis as uninterpretable. METHODS: Electrophoresis of serum proteins and immunotyping immunoassay were performed on Capillary 2 Flex Piercing® Sebia. RESULTS: A 72-year-old male patient was hospitalized in the clinical hematology department for deep lymphadenopathies with hepatocellular failure...
January 1, 2019: Clinical Laboratory
https://read.qxmd.com/read/30775300/monoclonal-gammopathy-of-undetermined-significance-associated-scleromyxoedema
#4
Kalgi D Baxi, Raju G Chaudhary, Santoshdev P Rathod, Ashish Jagati
Scleromyxoedema is a rare generalized cutaneous mucinosis, which in absence of thyroid disease, occurs almost invariably in patients with monoclonal gammopathies. A 54-year-old female patient presented with complaint of tightening of skin on the extremities, abdomen, forehead, gradually progressive since 1 year, episodes of generalized tonic-clonic convulsions, and acute psychosis since 5 days. Cutaneous examination revealed nonpitting edema over the face and sclerodermoid changes over extremities. Laboratory investigations showed presence of M-band on serum-protein electrophoresis and monoclonal spike of IgG lambda component on immunofixation...
January 2019: Indian Dermatology Online Journal
https://read.qxmd.com/read/30774945/neonatal-sepsis-due-to-glycopeptide-resistant-enterococcus-faecium-from-colonized-maternal-gut-rare-case-evidence
#5
Supram Hosuru Subramanya, Rajesh Amberpet, Dinesh Chaudhary, Niranjan Nayak, Shashiraja Padukone, Indira Bairy, Shishir Gokhale
Background: Vancomycin-resistant enterococcal infections in the neonatal ICU are growing global problems. We report a case of neonatal septicemia by multidrug-resistant vancomycin-resistant Enterococcus faecium (VRE), the source of infection being the mother's gut. Case presentation: A newborn male child admitted to the neonatal intensive care unit (NICU) was diagnosed to have mild meconium aspiration syndrome, early onset neonatal septicemia, and bacteremia by multidrug and vancomycin-resistant Enterococcus faecium ...
2019: Antimicrobial Resistance and Infection Control
https://read.qxmd.com/read/30774385/downregulated-expression-of-rack1-results-in-pancreatic-cancer-growth-and-metastasis
#6
Lei Zhang, Yang Lv, Yefei Rong, Wenqi Chen, Yuan Fang, Weilin Mao, Wenhui Lou, Dayong Jin, Xuefeng Xu
Background: The expression and function of the Receptor for Activated C Kinase 1 (RACK1) in cancer growth and metastasis are confused in different cancers, especially in pancreatic ductal adenocarcinoma (PDAC). Methods: One-hundred and eighty-two PDAC tissue specimens (95 males and 87 females) including pancreatic cancer tissue and para-carcinoma tissue were collected for analysis between 2005 to 2012. Blood phenotypic parameters using cell count and capillary electrophoresis were investigated...
2019: OncoTargets and Therapy
https://read.qxmd.com/read/30774273/-claudin-7-gene-knockout-causes-destruction-of-intestinal-structure-and-animal-death-in-mice
#7
Chang Xu, Kun Wang, Yu-Han Ding, Wen-Jing Li, Lei Ding
BACKGROUND: Claudin-7, one of the important components of cellular tight junctions, is currently considered to be expressed abnormally in colorectal inflammation and colorectal cancer. However, there is currently no effective animal model to study its specific mechanism. Therefore, we constructed three lines of Claudin-7 knockout mice using the Cre/LoxP system. AIM: To determine the function of the tumor suppressor gene Claudin-7 by generating three lines of Claudin-7 gene knockout mice...
February 7, 2019: World Journal of Gastroenterology: WJG
https://read.qxmd.com/read/30774126/using-in-vitro-and-in-cell-shape-to-investigate-small-molecule-induced-pre-mrna-structural-changes
#8
Jingxin Wang, John Hammond, Kristen A Johnson
In the process of drug development of RNA-targeting small molecules, elucidating the structural changes upon their interactions with target RNA sequences is desired. We herein provide a detailed in vitro and in-cell selective 2'-hydroxyl acylation analyzed by primer extension (SHAPE) protocol to study the RNA structural change in the presence of an experimental drug for spinal muscular atrophy (SMA), survival of motor neuron (SMN)-C2, and in exon 7 of the pre-mRNA of the SMN2 gene. In in vitro SHAPE, an RNA sequence of 140 nucleotides containing SMN2 exon 7 is transcribed by T7 RNA polymerase, folded in the presence of SMN-C2, and subsequently modified by a mild 2'-OH acylation reagent, 2-methylnicotinic acid imidazolide (NAI)...
January 30, 2019: Journal of Visualized Experiments: JoVE
https://read.qxmd.com/read/30773923/investigation-of-electrospray-for-a-capillary-electrophoresis-mass-spectrometry-interface-in-reverse-polarity-and-negative-ion-mode
#9
Morgan Stickney, Qiangwei Xia, I Jonathan Amster
Capillary zone electrophoresis (CZE) paired with mass spectrometry (MS) is a powerful analytical technique for examining mixtures of ionic analytes such as glycosaminoglycans. This study examines the mechanics of the electrospray process for a sheath flow CZE-MS interface under reverse polarity negative ionization conditions. Liquid flow in a sheath flow nano-electrospray CZE-MS interface is driven by two mechanisms, electroosmotic flow and electrospray nebulization. The contribution of these two processes to the overall flow of solution to the electrospray tip is influenced by the surface coatings of the sheath flow emitter tip and by the solvent composition...
February 2019: European Journal of Mass Spectrometry
https://read.qxmd.com/read/30773515/production-of-dibromomethane-and-changes-in-the-bacterial-community-in-bromoform-enriched-seawater
#10
Takafumi Kataoka, Atsushi Ooki, Daiki Nomura
The responses of bacterial communities to halocarbon were examined using a 28-d incubation of bromoform- and methanol-enriched subarctic surface seawater. Significant increases were observed in dibromomethane concentrations and bacterial 16S rRNA gene copy numbers in the treated substrates incubated for 13 d. The accumulated bacterial community was investigated by denaturing gradient gel electrophoresis and amplicon analyses. The dominant genotypes corresponded to the genera Roseobacter, Lentibacter, and Amylibacter; the family Flavobacteriaceae; and the phylum Planctomycetes, including methylotrophs of the genus Methylophaga and the family Methylophilaceae...
February 15, 2019: Microbes and Environments
https://read.qxmd.com/read/30772974/-biomarkers-screening-for-viral-myocarditis-through-proteomics-analysis-of-plasma-exosomes
#11
Z L Zhao, S Du, S X Shen, P Luo, S K Ding, G G Wang, L X Wang
Objective: To compare and analyze the differentially expressed plasma exosomic proteome between healthy control group (Control group) and viral myocarditis group (VMC group) to search for biomarkers that maybe used for early diagnosis of VMC. Methods: Fifty plasma samples of Control group and VMC group were collected respectively from Henan Provincial People's Hospital (from January 2016 to December 2017), and then 5 samples (1 ml) of each group were selected randomly, after exosomes extraction with ultra-centrifugation, difference gel electrophoresis (DIGE) was used to isolate the total proteins, and then the protein spots with more than 2-fold changes between VMC and Control group were picked up after the software analysis, afterward, the varied proteins were identified by MALDI-TOF/TOF mass spectrometry...
January 29, 2019: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://read.qxmd.com/read/30772563/dissemination-of-escherichia-coli-carrying-plasmid-mediated-quinolone-resistance-pmqr-genes-from-swine-farms-to-surroundings
#12
Bo Wu, Qin Qi, Xiaodan Zhang, Yumei Cai, Guanliu Yu, Jing Lv, Lili Gao, Liangmeng Wei, Tongjie Chai
Different samples were collected from three swine farms in China to investigate the spread of antibiotic-resistant Escherichia coli. A total of 130 E. coli isolates were obtained from feces, air, river water, silt, and soil samples and characterized. The susceptibility of the E. coli isolates to 19 antibiotics was tested. The results revealed that the resistance rates of the E. coli isolates against 9 antibiotics were high. The minimum inhibitory concentration (MIC) values of ciprofloxacin, ofloxacin, and nalidixic acid were mainly in the ranges of 2-64, 8-64, and 8-64 μg/ml...
January 25, 2019: Science of the Total Environment
https://read.qxmd.com/read/30772376/recombinant-protein-purification-in-baculovirus-infected-rachiplusia-nu-larvae-an-approach-towards-a-rational-design-of-downstream-processing-strategies-based-on-chromatographic-behavior-of-proteins
#13
G J Mc Callum, M B Arregui, I Smith, L F Bracco, F Wolman, O Cascone, A M Targovnik, M V Miranda
Expression of recombinant proteins with baculovirus-infected insect larvae is a scarcely investigated alternative in comparison to that in insect cell lines, a system with growing popularity in the field of biotechnology. The aim of this study was to investigate the chromatographic behavior and physicochemical properties of the proteome of Rachiplusia nu larvae infected with recombinant Autographa californica multiple nucleopolyhedrosis virus (AcMNPV), in order to design rational purification strategies for the expression of heterologous proteins in this very complex and little-known system, based on the differential absorption between target recombinant proteins and the system's contaminating ones...
February 14, 2019: Protein Expression and Purification
https://read.qxmd.com/read/30772060/capillary-electrophoretic-determination-of-heavy-metal-ions-using-11-mercaptoundecanoic-acid-and-6-mercapto-1-hexanol-co-functionalized-gold-nanoparticle-as-colorimetric-probe
#14
Junmin Bi, Tong Li, Hang Ren, Rui Ling, Zhenglong Wu, Weidong Qin
Capillary electrophoresis (CE) and gold nanoparticle aggregation based-colorimetric detection (AuNP/ABCD) were incorporated to provide rapid, sensitive and selective detection of Cd2+ , Pb2+ , and Hg2+ . CE and AuNP/ABCD were interfaced by a pressurized electric field decoupler to isolate the colorimetric reaction solution from the separation voltage. The AuNPs co-functionalized with 11-mercaptoundecanoic acid (MUA) and 6-mercapto-1-hexanol (MCH) were used as colorimetric probes, which provided enhanced sensitivity and good selectivity toward the heavy-metal ions...
February 8, 2019: Journal of Chromatography. A
https://read.qxmd.com/read/30771977/a-choline-chloride-acrylic-acid-deep-eutectic-solvent-polymer-based-on-fe-3-o-4-particles-and-mos-2-sheets-poly-chcl-aa-des-fe-3-o-4-mos-2-with-specific-recognition-and-good-antibacterial-properties-for-%C3%AE-lactoglobulin-in-milk
#15
Najing Fu, Liteng Li, Kaijing Liu, Chan Kyung Kim, Jun Li, Tao Zhu, Jianheng Li, Baokun Tang
With the development of deep eutectic solvents (DESs), more DES-based functional materials have been explored and applied in various areas. In this work, a novel choline chloride-acrylic acid (ChCl-AA) DES polymer, on a 2D magnetic base, was prepared for the recognition of β-lactoglobulin (β-LG) biomacromolecules in milk and for the inhibition of common bacteria such as Escherichia coli (E. coli), Pseudomonas fluorescens (P. fluorescens), Staphylococcus aureus (S. aureus), and Bacillus subtilis (B. subtilis)...
May 15, 2019: Talanta
https://read.qxmd.com/read/30771952/rapid-and-sensitive-capillary-electrophoresis-method-for-the-analysis-of-ecstasy-in-an-oral-fluid
#16
Piret Saar-Reismaa, Anastassia Tretjakova, Jekaterina Mazina-Šinkar, Merike Vaher, Mihkel Kaljurand, Maria Kulp
In the present study, a capillary electrophoresis method, with a native fluorescence detection for the quantification of three amphetamine derivatives, methylenedioxyamphetamine (MDA), 3,4-methylenedioxy-methamphetamine (MDMA), methylenedioxyethylamphetamine (MDEA) in an oral fluid is described. The reported CE method has made it possible to assess Ecstasy abuse in approximately 15 min, including a saliva sample collection, pretreatment procedures and capillary electrophoresis (CE) analysis. The proof of the principle that was demonstrated on a home-made lab scale instrument has had the potential to be easily translated onto a truly portable instrument for on-site measurements...
May 15, 2019: Talanta
https://read.qxmd.com/read/30771937/sensitive-assay-of-escherichia-coli-in-food-samples-by-microchip-capillary-electrophoresis-based-on-specific-aptamer-binding-strategy
#17
Yan Zhang, Luqi Zhu, Pingang He, Futing Zi, Xianzhi Hu, Qingjiang Wang
The rapid and cost-effective detection of bacteria is of great importance to ensuring food safety, preventing food poisoning. Herein, we developed a sensitive detection of Escherichia coli (E. coli) using bacteria-specific aptamer in conjunction with microchip capillary electrophoresis-coupled laser-induced fluorescence (MCE-LIF). Based on the differences between charge to mass ratios of free aptamer and bacteria-aptamer complex, which influence their electrophoretic mobilities, the separation of free aptamers and complex peaks by MCE could be achieved...
May 15, 2019: Talanta
https://read.qxmd.com/read/30771920/use-of-whole-electrophoretic-profile-and-chemometric-tools-for-the-differentiation-of-three-olive-oil-qualities
#18
Natalia Arroyo-Manzanares, Franziska Gabriel, Azahara Carpio, Lourdes Arce
Olive oil is a liquid fat obtained from olives (the fruit of Olea europea). It is one of the most important ingredients of the Mediterranean diet, due to its health benefits. Depending on its quality, olive oil can be classified as extra virgin (EVOO), virgin (VOO) and lampante (LOO). Currently, an official method defines the quality parameters of the different categories of olive oil using different analytical techniques and a sensory analysis through a Panel Test. However, the evaluation of olive oil quality by tasting panels has some drawbacks, such as the subjectivity of the analysis and the lack of panels accredited outside Spain...
May 15, 2019: Talanta
https://read.qxmd.com/read/30771916/3d-printed-gel-electrophoresis-device-coupling-with-icp-ms-for-online-separation-and-detection-of-metalloproteins
#19
Dingyi Wang, Bin He, Xueting Yan, Qiying Nong, Chao Wang, Jie Jiang, Ligang Hu, Guibin Jiang
We successfully developed a strategy to combine a customized gel electrophoresis device with ICP-MS for online separation and detection of metalloproteins. The self-designed horizontal column gel electrophoresis device was rapidly and easily fabricated in the laboratory via 3D printing with a low cost. The feasibility of 3D printing to fabricate this device was investigated by offline separation of commercial protein standards. And a better separation efficiency was found when using gel tubes printed with higher printing precision...
May 15, 2019: Talanta
https://read.qxmd.com/read/30770787/brain-region-specific-alterations-of-rna-editing-in-pde8a-mrna-in-suicide-decedents
#20
Fabrice Chimienti, Laurent Cavarec, Laurent Vincent, Nicolas Salvetat, Victoria Arango, Mark D Underwood, J John Mann, Jean-François Pujol, Dinah Weissmann
Phosphodiesterases (PDE) are key modulators of signal transduction and are involved in inflammatory cell activation, memory and cognition. There is a two-fold decrease in the expression of phosphodiesterase 8A (PDE8A) in the temporal cortex of major depressive disorder (MDD) patients. Here, we studied PDE8A mRNA-editing profile in two architectonically distinct neocortical regions in a clinically well-characterized cohort of age- and sex-matched non-psychiatric drug-free controls and depressed suicide decedents...
February 15, 2019: Translational Psychiatry
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