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https://www.readbyqxmd.com/read/29223135/simultaneous-anti-diabetic-and-anti-vascular-calcification-activity-of-nocardia-sp-utmc-751
#1
Fatemeh Salimi, Saeedeh Jafari-Nodooshan, Nazanin Zohourian, Sedighe Kolivand, Javad Hamedi
Alpha-amylase can act as a significant player in causing hyperglycemia, leading to protein glycation, which is the main complication in this condition, besides causing vascular calcification (VC), an important vascular failure caused due to thisIn order to find a natural source of the biocompounds with inhibitory effects on alpha-amylase,, fifteen fermentation broth extracts of actinobacteria (FBEA) (200 μg mL-1 ) have been screened. Finally, the effects of the most efficient FBE have been investigated on osteopontin (OPN, a VC marker) mRNA level in the vascular smooth muscle cells under the calcification conditions, and the chemical constituents of the most efficient FBE were analyzed using GC-MS analysis...
December 9, 2017: Letters in Applied Microbiology
https://www.readbyqxmd.com/read/29223103/bilateral-early-activity-in-the-hip-flexors-associated-with-falls-in-stroke-survivors-preliminary-evidence-from-laboratory-induced-falls
#2
Dmitrijs Celinskis, Mark D Grabiner, Claire F Honeycutt
OBJECTIVE: Falls are the most common and expensive medical complication following stroke. Hypermetric reflexes have been suggested to impact post-stroke balance but no study has evaluated reflex amplitudes under real conditions of falls in this population. Our objective was to quantify the early reflexive responses during falls induced in the laboratory. METHODS: Sixteen stroke survivors were exposed to posteriorly directed treadmill perturbations that required a forward step to maintain a balance...
November 21, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/29223071/bioactive-potential-of-silica-coatings-and-its-effect-on-the-adhesion-of-proteins-to-titanium-implants
#3
F Romero-Gavilan, N Araújo-Gomes, A M Sánchez-Pérez, I García-Arnáez, F Elortza, M Azkargorta, J J Martín de Llano, C Carda, M Gurruchaga, J Suay, I Goñi
There is an ever-increasing need to develop dental implants with ideal characteristics to achieve specific and desired biological response in the scope of improve the healing process post-implantation. Following that premise, enhancing and optimizing titanium implants through superficial treatments, like silica sol-gel hybrid coatings, are regarded as a route of future research in this area. These coatings change the physicochemical properties of the implant, ultimately affecting its biological characteristics...
December 6, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29223062/hplc-ms-ms-method-optimisation-for-matrix-metalloproteinase-3-and-matrix-metalloproteinase-9-determination-in-human-blood-serum-using-target-analysis
#4
Petra Kotnik, Metka Koren Krajnc, Artur Pahor, Matjaž Finšgar, Željko Knez
A quantitative analysis of zinc endopeptidases matrix metalloproteinase 9 (MMP9) and matrix metalloproteinase 3 (MMP3) from human blood serum are presented. Both matrix metalloproteinases (MMP) are present in human blood serum and can be used as biomarkers for different diseases. The analysis was performed using LC-MS/MS with a triple quadrupole mass spectrometer, based on two specific peptides of each MMP in comparison with an enzyme-linked immunosorbent assay (ELISA). While the conditions for the LC-MS/MS analysis of MMP9 peptides were previously reported for bronchoalveolar lavage fluid, the analysis of MMP3 peptides was newly quantified for human blood serum herein for the first time...
November 29, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/29223061/impurity-profiling-of-n-n-ethylenebis-l-cysteine-diethyl-ester-bicisate
#5
Oliver Wahl, Jan Cleynhens, Alfons M Verbruggen, Ulrike Holzgrabe
A HPLC-UV-CAD method with a HILIC column for impurity profiling of the 99mTc chelating agent bicisate has been developed and evaluated. Bicisate and its impurities were separated by means of isocratic elution on a zwitterionic stationary phase using a mixture of 7.5mmol/L trifluoroacetic acid and acetonitrile (47.5:52.5 V/V) as the mobile phase. Five different bicisate batches of a manufacturer were tested using the method. In addition LC-MS experiments were conducted in order to identify the impurities. The predominant impurities found were the oxidation product (disulfide), the monoester of ethylene dicysteine and an unknown compound with an m/z of 293 in ESI positive mode...
December 5, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/29223050/a-simple-rapid-and-stability-indicating-validated-method-for-quantification-of-lamotrigine-in-human-plasma-and-dry-plasma-spot-using-lc-esi-ms-ms-application-in-clinical-study
#6
Kuldeep Kumar Namdev, Jaya Dwivedi, Deepak Chandra Chilkoti, Swapnil Sharma
Lamotrigine (LTZ) is a phenyltriazine derivative which belongs to anti-epileptic drugs (AEDs) class and prescribed as mono- or adjunctive-therapy in treatment of epilepsy. Therapeutic drug monitoring (TDM) of AEDs provides a valid clinical tool in optimization of overall therapy. However, TDM is challenging due to the high biological samples (plasma/blood) storage/shipment costs and the limited availability of laboratories providing TDM services. Sampling in the form of dry plasma spot (DPS) or dry blood spot (DBS) are suitable alternative to overcome these issues...
December 1, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/29223048/extraction-protocol-and-liquid-chromatography-tandem-mass-spectrometry-method-for-determining-micelle-entrapped-paclitaxel-at-the-cellular-and-subcellular-levels-application-to-a-cellular-uptake-and-distribution-study
#7
Nan Zheng, Bin Lian, Wenwen Du, Guobing Xu, Jiafu Ji
Paclitaxel-loaded polymeric micelles (PTX-PM) are commonly used as tumor-targeted nanocarriers and display outstanding antitumor features in clinic, but its accumulation and distribution in vitro are lack of investigation. It is probably due to the complex micellar system and its low concentration at the cellular or subcellular levels. In this study, we developed an improved extraction method, which was a combination of mechanical disruption and liquid-liquid extraction (LLE), to extract the total PTX from micelles in the cell lysate and subcellular compartments...
December 6, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/29223047/identification-and-analysis-of-a-mercapturic-acid-conjugate-of-indole-3-methyl-isothiocyanate-in-the-urine-of-humans-who-consumed-cruciferous-vegetables
#8
Pramod Upadhyaya, Adam T Zarth, Naomi Fujioka, Vincent A Fritz, Stephen S Hecht
Glucobrassicin, a quantitatively significant constituent of Brassica vegetables, gives rise to indole-3-carbinol (I3C) and its dimer di-indolylmethane (DIM) when the vegetables are chewed. I3C and DIM have been extensively studied with respect to their anti-carcinogenic properties. However, the presumed intermediate isothiocyanate in their formation, indole-3-methyl isothiocyanate (IMITC), has to our knowledge never been observed, despite the fact that isothiocyanates derived from cruciferous vegetables are known to have anti-carcinogenic properties...
December 2, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/29223046/cohort-friendly-protocol-for-a-sensitive-and-fast-method-for-trihalomethanes-in-urine-using-gas-chromatography-triple-quadrupole-mass-spectrometry
#9
Pantelis Charisiadis, Konstantinos C Makris
A cohort-friendly biomonitoring protocol has been developed for measuring biomarkers of exposure to disinfection by-products (trihalomethanes, THM) in urine using small initial volume (3mL) and short analysis time (∼10min) that facilitates the throughput of a large number of samples. The objective of this study was to optimise a cohort-friendly biomonitoring protocol for the determination of four THM analytes in human urine using gas chromatography coupled with triple quadrupole mass spectrometry (GC-QqQ-MS/MS)...
December 6, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/29223016/application-of-single-nucleotide-extension-and-maldi-tof-mass-spectrometry-in-proofreading-and-dna-repair-assay
#10
Kang-Yi Su, Hung-Ming Lai, Steven D Goodman, Wei-Yao Hu, Wern-Cherng Cheng, Liang-In Lin, Ya-Chien Yang, Woei-Horng Fang
Proofreading and DNA repair are important factors in maintaining the high fidelity of genetic information during DNA replication. Herein, we designed a non-labeled and non-radio-isotopic simple method to measure proofreading. An oligonucleotide primer is annealed to a template DNA forming a mismatched site and is proofread by Klenow fragment of Escherichia coli DNA polymerase I (pol I) in the presence of all four dideoxyribonucleotide triphosphates. The proofreading excision products and re-synthesis products of single nucleotide extension are subjected to MALDI-TOF mass spectrometry (MS)...
December 2, 2017: DNA Repair
https://www.readbyqxmd.com/read/29223014/differentiation-of-dry-cured-hams-from-different-processing-methods-by-means-of-volatile-compounds-physico-chemical-and-sensory-analysis
#11
Sandra Petričević, Nives Marušić Radovčić, Katarina Lukić, Eddy Listeš, Helga Medić
The aim of this study was to characterize dry-cured hams from four different processing methods (differences in primary leg treatment, salting and smoking phase). Volatile compounds were isolated by using headspace-solid phase microextraction and analysed by gas chromatography/mass spectrometry (GC/MS). Samples were also evaluated by sensory and physico-chemical characteristics (moisture, protein, fat and NaCl content, aw, colour). 149 volatile compounds of dry-cured hams were identified and 15 of them were quantified...
December 5, 2017: Meat Science
https://www.readbyqxmd.com/read/29223009/influence-of-spermatozoal-lipidomic-profile-on-the-cryoresistance-of-frozen-spermatozoa-from-stallions
#12
T Cabrera, C Ramires-Neto, K R A Belaz, C P Freitas-Dell'aqua, D Zampieri, A Tata, M N Eberlin, M A Alvarenga, F F Souza
The membrane of spermatozoa, which contributes to cellular cryoresistance, contains numerous lipids with a composition that directly affects membrane fluidity and the fertilization process. In light of variations in the degree of sensitivity in equine seminal freezing, this study aimed to correlate equine semen lipids with post-thawing characteristics of spermatozoa. We used ejaculates from 34 stallions, which were evaluated (total motility ≥ 60%), frozen and thawed and reevaluated for motility of spermatozoa, membrane integrity and lipid peroxidation...
November 26, 2017: Theriogenology
https://www.readbyqxmd.com/read/29222903/vitamin-d-status-and-cardiometabolic-risk-factors-in-young-adults-in-hong-kong-associations-and-implications
#13
Erica Wei-Lan Wang, Marco Yiu-Chung Pang, Parco Ming-Fai Siu, Claudia Kam-Yuk Lai, Jean Woo, Andrew R Collins, Iris Ff Benzie
BACKGROUND AND OBJECTIVES: Vitamin D deficiency is reportedly common, but we lack data from young adults. Such data are of interest because epidemiological data support vitamin D as a possible risk modulator for diabetes and cardiovascular ('cardiometabolic') disease. Our objectives were to assess vitamin D status (as plasma 25(OH)D concentration) and investigate associations between this and biomarkers of cardiometabolic disease risk in a group of still-healthy young adults in Hong Kong...
2018: Asia Pacific Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/29222865/multipoint-pacing-improves-peripheral-hemodynamic-response-non-invasive-assessment-using-radial-artery-tonometry
#14
Giuseppe Ciconte, Žarko Ćalović, Gabriele Vicedomini, Amarild Cuko, Luke C McSpadden, Chunlan Jiang, Kyungmoo Ryu, Igor Caporaso, Robert Stutz, Dean Winter, Massimo Saviano, Raffaele Vitale, Manuel Conti, Vincenzo Santinelli, Carlo Pappone
BACKGOUND: Multipoint left ventricular (LV) pacing (MultiPoint™ Pacing [MPP], Abbott) improves the response rate to cardiac resynchronization therapy (CRT). We evaluated the feasibility of non-invasive radial artery tonometry (RAT) to characterize arterial pressure morphology changes (pre-ejection period [PEP] and ejection duration [ED]) between conventional CRT and MPP pacing interventions. METHODS: Patients with a MPP-enabled CRT device (Quadra Assura MP™, Abbott) underwent non-invasive RAT assessment (SphygmoCor CVMS, AtCor Medical Inc...
December 9, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/29222860/adenosine-sensitive-wolff-parkinson-white-longer-time-across-the-atrioventricular-groove
#15
Cheyenne Beach, Christopher W Follansbee, Lee Beerman, Sharon Mazzocco, Li Wang, Gaurav Arora
BACKGROUND: Successful ablation sites in Wolff-Parkinson-White syndrome (WPW) are characterized by short atrioventricular (AV) intervals. Approximately 15% of patients with WPW have adenosine-sensitive accessory pathways (APs). We sought to determine if local AV intervals of adenosine-sensitive APs are different from those of adenosine-insensitive APs in patients with WPW. METHODS: Patients ≤ 21 years with WPW and adenosine-sensitive APs who underwent successful ablation over a 9-year period were included...
December 9, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/29222826/application-of-ultra-performance-liquid-chromatography-coupled-with-quadrupole-time-of-flight-mass-spectrometry-in-identification-of-three-isoflavone-glycosides-and-their-corresponding-metabolites
#16
Xiafen Xu, Xinhui Li, Xianrui Liang
RATIONALE: Metabolites of isoflavones raised great attention due to the potential bioactivities in recent years. However, the complex constituents of metabolic system and low level of metabolites made it difficult to analyze. Mass spectrometry (MS) method was applied in our metabolites identification and fragmentation pathways study due to the advantages of rapidity, sensitivity, and low level of sample consumption. METHODS: Three isoflavone glycosides and their metabolites were identified with using ultra-performance liquid chromatography coupled with quadrupole time-of-flight tandem mass spectrometry (UPLC/QTOF-MS)...
December 8, 2017: Rapid Communications in Mass Spectrometry: RCM
https://www.readbyqxmd.com/read/29222814/siena-xl-for-improving-the-assessment-of-gray-and-white-matter-volume-changes-on-brain-mri
#17
Marco Battaglini, Mark Jenkinson, Nicola De Stefano
In this article, SIENA-XL, a new segmentation-based longitudinal pipeline is introduced, for: (i) increasing the precision of longitudinal volume change estimation for white (WM) and gray (GM) matter separately, compared with cross-sectional segmentation methods such as SIENAX; and (ii) avoiding potential biases in registration-based methods when Jacobians are used, with a smoothing extent larger than spatial scale between tissue-interfaces, which is where atrophy usually occurs. SIENA-XL implements a new brain extraction procedure and a multi-time-point intensity equalization step before performing the final segmentation that also includes separate segmentation of deep GM structures by using FMRIB's Integrated Registration and Segmentation Tool...
December 8, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/29222758/differential-proteomics-based-on-2d-difference-in-gel-electrophoresis-and-tandem-mass-spectrometry-for-the-elucidation-of-biological-processes-in-antibiotic-producer-bacterial-strains
#18
Giuseppe Gallo, Andrea Scaloni
Proteomics based on 2D-Difference In Gel Electrophoresis (2D-DIGE) coupled with mass spectrometry (MS) procedures can be considered a "gold standard" to determine quantitatively and comparatively protein abundances in cell extracts from different biological sources/conditions according to a gel-based approach. In particular, 2D-DIGE is used for protein specie separation, detection, and relative quantification, whenever tandem MS is used to obtain peptide sequence information that is managed according to bioinformatic procedures to identify the differentially represented protein species...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29222715/clinical-validation-study-of-dried-blood-spot-for-determining-everolimus-concentration-in-patients-with-cancer
#19
A E C A B Willemsen, L M Knapen, Y M de Beer, R J M Brüggemann, S Croes, C M L van Herpen, N P van Erp
PURPOSE: Everolimus treatment is seriously hampered by its toxicity profile. As a relationship between everolimus exposure and effectiveness and toxicity has been established, early and ongoing concentration measurement can be key to individualize the dose and optimize treatment outcomes. Dried blood spot (DBS) facilitates sampling at a patients' home and thereby eases dose individualization. The aim of this study is to determine the agreement and predictive performance of DBS compared to whole blood (WB) to measure everolimus concentrations in cancer patients...
December 8, 2017: European Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/29222700/perspectives-from-the-patient-and-the-healthcare-professional-in-multiple-sclerosis-social-media-and-participatory-medicine
#20
Daniel Kantor, Jeremy R Bright, Jeri Burtchell
When faced with a diagnosis of multiple sclerosis (MS), patients often turn to the Internet and social media to find support groups, read about the experiences of other people affected by MS and seek their advice, and research their condition and treatment options to discuss with their healthcare professionals (HCPs). Here, we examine the use of social media and the Internet among patients with MS, considering its impact on patient empowerment and patient participation in treatment decision-making and MS research...
December 8, 2017: Neurology and Therapy
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