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Patrice Vallin, Olivier Désy, Stéphanie Béland, François Bouchard-Boivin, Isabelle Houde, S A De Serres
BACKGROUND: The successful development of immunosuppressive agents has paradoxically led to an era in which adverse effects of immunosuppression, such as infections and cancer, are now a major concern in solid organ recipients. Nevertheless, the main focus of immune monitoring research remains the identification of rejection. There is currently no clinical tool to assess the net state of immunosuppression or to identify patients at increased risk of infectious complications. METHODS: We report a prospective, longitudinal study in which we conducted detailed phenotyping of over 300 peripheral blood mononuclear cell samples from 45 kidney recipients during the first 24 months posttransplant...
February 20, 2018: Transplantation
Ahva Shahabi, Desi Peneva, Devin Incerti, Kimmie McLaurin, Warren Stevens
BACKGROUND: The variability in cost of palivizumab treatment, indicated for prevention of respiratory syncytial virus (RSV) infections in high-risk infants, has not been robustly estimated in prior studies. This study aimed to determine the cost variations of palivizumab from a US payer perspective for otherwise healthy preterm infants born 29-35 weeks gestational age (wGA) using infant characteristics and applied dosing regimens. METHODS: Fenton Growth Charts were merged with World Health Organization Child Growth Standards to estimate preterm infant growth patterns...
March 2018: PharmacoEconomics Open
Adam Taylor, Alex Dexter, Josephine Bunch
In this study we have explored several aspects of regional analyte suppression in mass spectrometry imaging of a heterogeneous sample; transverse cryosections of mouse brain. Olanzapine was homogeneously coated across the section prior to DESI and MALDI mass spectrometry imaging. We employed the concept of a tissue extinction coefficient (TEC) to assess suppression of an analyte on tissue relative to its intensity in an off tissue region. We expanded the use of TEC, by first segmenting anatomical regions using graph-cuts clustering, and calculating a TEC for each cluster...
February 20, 2018: Analytical Chemistry
Htoo W Paing, R Kenneth Marcus
A practical method for preparation of solution residue samples for analysis utilizing the ambient desorption liquid sampling-atmospheric pressure glow discharge optical emission spectroscopy (AD-LS-APGD-OES) microplasma is described. Initial efforts involving placement of solution aliquots in wells drilled into copper substrates, proved unsuccessful. A design-of-experiment (DOE) approach was carried out to determine influential factors during sample deposition including solution volume, solute concentration, number of droplets deposited, and the solution matrix...
February 20, 2018: Analyst
My Kieu Ha, Tung Xuan Trinh, Jang Sik Choi, Desy Maulina, Hyung Gi Byun, Tae Hyun Yoon
Development of nanotoxicity prediction models is becoming increasingly important in the risk assessment of engineered nanomaterials. However, it has significant obstacles caused by the wide heterogeneities of published literature in terms of data completeness and quality. Here, we performed a meta-analysis of 216 published articles on oxide nanoparticles using 14 attributes of physicochemical, toxicological and quantum-mechanical properties. Particularly, to improve completeness and quality of the extracted dataset, we adapted two preprocessing approaches: data gap-filling and physicochemical property based scoring...
February 16, 2018: Scientific Reports
Baoli Sun, Nazir Ahmad Khan, Peiqiang Yu
The first aim of this study was to investigate the nutritional value of crude protein (CP) in CDC [Crop Development Centre (CDC), University of Saskatchewan] chickpea varieties (Frontier kabuli and Corinne desi) in comparison with a CDC barley variety in terms of: 1) CP chemical profile and subfractions; (2) in situ rumen degradation kinetics and intestinal digestibility of CP; 2) metabolizable protein (MP) supply to dairy cows; and (3) protein molecular structure characteristics using advanced molecular spectroscopy...
February 6, 2018: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
Haixiu Yang, Yunpeng Zhang, Jiasheng Wang, Tan Wu, Siyao Liu, Yanjun Xu, Desi Shang
An important challenge in drug development is to gain insight into the mechanism of drug sensitivity. Looking for insights into the global relationships between drugs and their sensitivity genes would be expected to reveal mechanism of drug sensitivity. Here we constructed a drug-sensitivity gene network (DSGN) based on the relationships between drugs and their sensitivity genes, using drug screened genomic data from the NCI-60 cell line panel, including 181 drugs and 1057 sensitivity genes, and 1646 associations between them...
January 9, 2018: Oncotarget
Mads S Bergholt, Andrea Serio, James S McKenzie, Amanda Boyd, Renata F Soares, Jocelyn Tillner, Ciro Chiappini, Vincen Wu, Andreas Dannhorn, Zoltan Takats, Anna Williams, Molly M Stevens
Analyzing lipid composition and distribution within the brain is important to study white matter pathologies that present focal demyelination lesions, such as multiple sclerosis. Some lesions can endogenously re-form myelin sheaths. Therapies aim to enhance this repair process in order to reduce neurodegeneration and disability progression in patients. In this context, a lipidomic analysis providing both precise molecular classification and well-defined localization is crucial to detect changes in myelin lipid content...
January 24, 2018: ACS Central Science
D M Domínguez-Arispuro, E O Cuevas-Rodríguez, J Milán-Carrillo, L León-López, R Gutiérrez-Dorado, C Reyes-Moreno
Legume sprouts are considered natural, healthy products that provide a source of bioactive compounds to fight against chronic diseases. This study aims to identify the optimal germination temperature (GT) and germination time (Gt) to maximize total phenolic and flavonoid contents (TPC, FC), and antioxidant activity (AoxA) of desi chickpea. Response surface methodology was used as an optimization tool. An experimental design with two factors (GT and Gt) and five levels was used (13 treatments). The sprouts from each treatment were lyophilized, tempered, and milled to obtain germinated chickpea flours (GCF)...
February 2018: Journal of Food Science and Technology
Delphine Parrot, Stefano Papazian, Daniel Foil, Deniz Tasdemir
Imaging mass spectrometry (IMS) has recently established itself in the field of "spatial metabolomics." Merging the sensitivity and fast screening of high-throughput mass spectrometry with spatial and temporal chemical information, IMS visualizes the production, location, and distribution of metabolites in intact biological models. Since metabolite profiling and morphological features are combined in single images, IMS offers an unmatched chemical detail on complex biological and microbiological systems. Thus, IMS-type "spatial metabolomics" emerges as a powerful and complementary approach to genomics, transcriptomics, and classical metabolomics studies...
January 31, 2018: Planta Medica
Hannah Marie Brown, Valentina Pirro, R Graham Cooks
No abstract text is available yet for this article.
January 29, 2018: Clinical Chemistry
Kyle D Duncan, Ingela Lanekoff
Liquid extraction mass spectrometry imaging (MSI) experiments provide users with direct analysis of biological surfaces with minimal sample preparation. Until now, much of the effort to increase spatial resolution for MSI with liquid extraction techniques has focused on reducing the size of the sampling area. However, this can be experimentally challenging. Here, we present oversampling as a simple alternative to increase the spatial resolution using nanospray desorption electrospray ionization (nano-DESI) MSI...
January 26, 2018: Analytical Chemistry
Supriatno, Nurlelasari, Tati Herlina, Desi Harneti, Rani Maharani, Ace Tatang Hidayat, Tri Mayanti, Unang Supratman, Mohamad Nurul Azmi, Yoshihito Shiono
A new limonoid, pentandricine (1), along with three known limonoids, ceramicine B (2), 6-de(acetyloxy)-23-oxochisocheton (3), 6-de(acetyloxy)-23-oxo-7-O-deacetylchisocheton (4), have been isolated from the stembark of Chisocheton pentandrus. The chemical structures of the new compound were elucidated on the basis of spectroscopic evidence. All of the compounds were tested for their cytotoxic effects against MCF-7 breast cancer cells. Compounds 1-4 showed weak and no cytotoxicity against MCF-7 breast cancer cells with IC50 values of 369...
January 25, 2018: Natural Product Research
Ram Jatan, Puneet Singh Chauhan, Charu Lata
MicroRNAs are small non-coding regulatory RNA molecules that play an important role in the modulation of gene expression during various environmental stresses. Pseudomonas putida RA, a plant growth promoting rhizobacteria (PGPR) colonizes the root surface of plants improving their growth and development during abiotic stresses modulating the expression of stress-responsive genes; however, the impact of RA on stress responsive-miRNA remains elusive. The present study was an attempt to delineate the role of PGPR in modulating stress responsive-miRNAs in a tolerant desi chickpea genotype exposed to drought and salt stresses...
January 10, 2018: Genomics
Linn E Moore, Bradley W Byers, Desi P Fuhr, Eric Wong, Mohit Bhutani, Michael K Stickland
BACKGROUND: Heightened arterial stiffness is a marker of cardiovascular risk and is elevated in chronic obstructive pulmonary disease (COPD). Physical activity has been shown to reduce arterial stiffness, and our previous work has shown that arterial stiffness is related to physical activity and exercise tolerance in COPD. The purpose of this study was to evaluate whether baseline physical activity and exercise tolerance influence the cardiovascular benefits associated with standard COPD outpatient pulmonary rehabilitation (PR)...
November 2017: Respiratory Medicine
Stephanie Tow, Desi Carozza, Kim Barker
A 48 year-old man with lung squamous cell carcinoma was admitted to acute care with cognitive impairment after recent chemotherapy. He developed myoclonus, ataxia, agitation, and visual hallucinations. Morvan's Syndrome, a rare voltage-gated potassium channel antibody disorder characterized by neuromyotonia with central nervous system dysfunction, was eventually diagnosed. He received plasmapheresis and was admitted to inpatient rehabilitation, where he safely participated in therapies. By focusing on neuromuscular rehabilitation, balance training, fine motor skills, and cognitive retraining emphasizing skills relevant to the patient's premorbid cognitive activities, the patient demonstrated significant functional improvement, decreasing the burden of care of his caregivers...
December 5, 2017: PM & R: the Journal of Injury, Function, and Rehabilitation
Swathy Jakka Ravindran, Ramesh Kumar, Amitava Srimany, Ligy Philip, Thalappil Pradeep
By direct analysis of water purification membranes using ambient ionization mass spectrometry, an attempt has been made to understand the molecular signatures of bacterial fouling. Membrane based purification methods are used extensively in water treatment and a major challenge for them is biofouling. The build-up of microbes and their extracellular polymeric matrix clog the membranes and reduce their efficiency. To understand the early stages of bacterial fouling on water purification membranes, we have used Desorption Electrospray Ionization Mass Spectrometry (DESI MS), where ion formation occurs in ambient conditions and the ionization event is surface sensitive...
December 6, 2017: Analytical Chemistry
Nethaji J Gallage, Kirsten Jørgensen, Christian Janfelt, Agnieszka J Z Nielsen, Thomas Naake, Eryk Dunski, Lene Dalsten, Michel Grisoni, Birger Lindberg Møller
Vanillin is the most important flavour compound in the vanilla pod. VpVAN catalyzes the conversion of ferulic acid and ferulic acid glucoside into vanillin and vanillin glucoside, respectively. Desorption Electrospray Ionization Mass Spectrometry Imaging (DESI-MSI) of vanilla (Vanilla planifolia) pod sections demonstrate that vanillin glucoside is preferentially localized within the mesocarp and placental laminae whereas vanillin is preferentially localized within the mesocarp. VpVAN is present as the mature form (25 kDa) but dependent on tissue and isolation procedure small amounts of the immature unprocessed form (40 kDa) and putative oligomers (50, 75 and 100 kDa) may be observed by immunoblotting using an antibody specific to the C-terminal sequence of VpVAN...
November 24, 2017: Plant & Cell Physiology
Tyler J Yarger, Elizabeth M Yuill, Lane A Baker
We introduce probe-substrate distance (Dps)-control to desorption electrospray ionization (DESI) and report a systematic investigation of key experimental parameters. Examination of voltage, flow rate, and nebulizing gas pressure suggests as Dps decreases, the distance-dependent spray current increases, until a critical point. At the critical point the relationship inverts, and the spray current decreases as the probe moves closer to the surface due to constriction of solution flow by the nebulizing gas. Dps control was used to explore the use of spray current as a signal for feedback positioning, while mass spectrometry imaging was performed simultaneously...
November 27, 2017: Journal of the American Society for Mass Spectrometry
Desy Ayu Wardani, Imami Nur Rachmawati, Dewi Gayatri
Pregnant teens often feel uncertain in the last trimester about their ability to take care of their baby. At this time, maternal confidence in the ability to care for the baby is an important step in the preparation for becoming a mother. The purpose of this study was to examine the validity and reliability of an Indonesian version of the Young Adult Maternal Confidence Scale (YAMCS) as an instrument to measure maternal self-efficacy of pregnant teens in the last trimester. The study consisted of 90 pregnant teens, age of respondents less than 19 years and living in 1 of 3 sub-districts: Cilember, Sukamanah and Megamendung, Bogor Regency...
2017: Comprehensive Child and Adolescent Nursing
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