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https://www.readbyqxmd.com/read/28213143/selective-detection-of-cu-2-and-co-2-in-aqueous-media-asymmetric-chemosensors-crystal-structure-and-spectroscopic-studies
#1
Samira Gholizadeh Dogaheh, Hamid Khanmohammadi, E Carolina Sañudo
Two new azo-azomethine receptors, H2L(1) and H2L(2), containing hydrazine, naphthalene and different electron withdrawing groups, Cl and NO2, have been designed and synthesized for qualitative and quantitative detection of Cu(2+) and Co(2+) in aqueous media. The crystal structure of H2L(1)is reported. The H2L(1)was used as a chemosensor for selective detection of trace amount of Cu(2+) in aqueous media. H2L(2) was also applied to naked-eye distinction of Cu(2+) and Co(2+) from other transition metal ions in aqueous media...
February 8, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28212932/purification-and-characterisation-of-a-pronase-inducible-lectin-isolated-from-human-serum
#2
Beulaja Manikandan, Manikandan Ramar, Thiagarajan Raman, Mullainadhan Periasamy, Arumugam Munusamy
A new lectin was purified to electrophoretic homogeneity from pronase treated human serum by a single-step of affinity chromatography on concanavalin A-Sepharose 4B. The isolated lectin agglutinated five types of vertebrate RBC, with highest titer against hen RBC. This activity was independent of divalent cations, insensitive to EDTA and specific to mannosamine, glucosamine as well as galactosamine. This lectin gave a single symmetrical peak in its native form with a molecular mass estimate of 6kDa in FPLC analysis and 6...
February 14, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28207866/a-novel-mechanism-of-metal-gel-shift-by-histidine-rich-ni2-binding-hpn-protein-from-helicobacter-pylori-strain-ss1
#3
Rahul Mahadev Shelake, Yuki Ito, Junya Masumoto, Eugene Hayato Morita, Hidenori Hayashi
Sodium dodecyl sulphate-polyacrylamide gel electrophoresis (SDS-PAGE) is a universally used method for determining approximate molecular weight (MW) in protein research. Migration of protein that does not correlate with formula MW, termed "gel shifting" appears to be common for histidine-rich proteins but not yet studied in detail. We investigated "gel shifting" in Ni2+-binding histidine-rich Hpn protein cloned from Helicobacter pylori strain SS1. Our data demonstrate two important factors determining "gel shifting" of Hpn, polyacrylamide-gel concentration and metal binding...
2017: PloS One
https://www.readbyqxmd.com/read/28207855/novel-approaches-for-the-taxonomic-and-metabolic-characterization-of-lactobacilli-integration-of-16s-rrna-gene-sequencing-with-maldi-tof-ms-and-1h-nmr
#4
Claudio Foschi, Luca Laghi, Carola Parolin, Barbara Giordani, Monica Compri, Roberto Cevenini, Antonella Marangoni, Beatrice Vitali
Lactobacilli represent a wide range of bacterial species with several implications for the human host. They play a crucial role in maintaining the ecological equilibrium of different biological niches and are essential for fermented food production and probiotic formulation. Despite the consensus about the 'health-promoting' significance of Lactobacillus genus, its genotypic and phenotypic characterization still poses several difficulties. The aim of this study was to assess the integration of different approaches, genotypic (16S rRNA gene sequencing), proteomic (MALDI-TOF MS) and metabolomic (1H-NMR), for the taxonomic and metabolic characterization of Lactobacillus species...
2017: PloS One
https://www.readbyqxmd.com/read/28207798/altered-hepatic-lipid-metabolism-in-mice-lacking-both-the-melanocortin-type-4-receptor-and-low-density-lipoprotein-receptor
#5
Vera Lede, Andrej Meusel, Antje Garten, Yulia Popkova, Melanie Penke, Christin Franke, Albert Ricken, Angela Schulz, Wieland Kiess, Daniel Huster, Torsten Schöneberg, Jürgen Schiller
Obesity is often associated with dyslipidemia and hepatosteatosis. A number of animal models of non-alcoholic fatty liver disease (NAFLD) are established but they significantly differ in the molecular and biochemical changes depending on the genetic modification and diet used. Mice deficient for melanocortin type 4 receptor (Mc4rmut) develop hyperphagia, obesity, and subsequently NAFLD already under regular chow and resemble more closely the energy supply-driven obesity found in humans. This animal model was used to assess the molecular and biochemical consequences of hyperphagia-induced obesity on hepatic lipid metabolism...
2017: PloS One
https://www.readbyqxmd.com/read/28207789/carbapenem-resistance-and-pathogenicity-of-bovine-acinetobacter-indicus-like-isolates
#6
Peter Klotz, Stephan Göttig, Ursula Leidner, Torsten Semmler, Sandra Scheufen, Christa Ewers
The objective of this study was to characterize blaOXA-23 harbouring Acinetobacter indicus-like strains from cattle including genomic and phylogenetic analyses, antimicrobial susceptibility testing and evaluation of pathogenicity in vitro and in vivo. Nasal and rectal swabs (n = 45) from cattle in Germany were screened for carbapenem-non-susceptible Acinetobacter spp. Thereby, two carbapenem resistant Acinetobacter spp. from the nasal cavities of two calves could be isolated. MALDI-TOF mass spectrometry and 16S rDNA sequencing identified these isolates as A...
2017: PloS One
https://www.readbyqxmd.com/read/28201995/zoonotic-necrotizing-myositis-caused-by-streptococcus-equi-subsp-zooepidemicus-in-a-farmer
#7
Bård Reiakvam Kittang, Veronika Kuchařová Pettersen, Oddvar Oppegaard, Dag Harald Skutlaberg, Håvard Dale, Harald G Wiker, Steinar Skrede
BACKGROUND: Streptococcus equi subsp. zooepidemicus is a beta-hemolytic group C streptococcus mainly causing infections in domesticated animals. Here we describe the first case of zoonotic necrotizing myositis caused by this bacterium. CASE PRESENTATION: The patient was a 73-year-old, previously healthy farmer with two asymptomatic Shetland ponies in his stable. After close contact with the ponies while feeding them, he rapidly developed erythema of his left thigh and sepsis with multiple organ failure...
February 15, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28199346/revertant-mosaicism-for-family-mutations-is-not-observed-in-brca1-2-phenocopies
#8
Jacopo Azzollini, Chiara Pesenti, Luca Ferrari, Laura Fontana, Mariarosaria Calvello, Bernard Peissel, Giorgio Portera, Silvia Tabano, Maria Luisa Carcangiu, Paola Riva, Monica Miozzo, Siranoush Manoukian
In BRCA1/2 families, early-onset breast cancer (BrCa) cases may be also observed among non-carrier relatives. These women are considered phenocopies and raise difficult counselling issues concerning the selection of the index case and the residual risks estimate in negative family members. Few studies investigated the presence of potential genetic susceptibility factors in phenocopies, mainly focussing on BrCa-associated single-nucleotide polymorphisms. We hypothesized that, as for other Mendelian diseases, a revertant somatic mosaicism, resulting from spontaneous correction of a pathogenic mutation, might occur also in BRCA pedigrees...
2017: PloS One
https://www.readbyqxmd.com/read/28198080/proteomic-profiling-of-mature-leaves-from-oil-palm-elaeis-guineensis-jacq
#9
Hooi Sin Tan, Richard P Jacoby, Meilina Ong-Abdullah, Nicolas L Taylor, Susan Liddell, Wong Wei Chee, Chiew Foan Chin
Oil palm is one of the most productive oil bearing crops grown in Southeast Asia. Due to the dwindling availability of agricultural land and increasing demand for high yielding oil palm seedlings, clonal propagation is vital to the oil palm industry. Most commonly, leaf explants are used for in vitro micropropagation of oil palm and to optimise this process it is important to unravel the physiological and molecular mechanisms underlying somatic embryo production from leaves. In this study, a proteomic approach was used to determine protein abundance of mature oil palm leaves...
February 15, 2017: Electrophoresis
https://www.readbyqxmd.com/read/28195465/identification-and-relative-quantification-of-bioactive-peptides-sequentially-released-during-simulated-gastrointestinal-digestion-of-commercial-kefir
#10
Yufang Liu, Monika Pischetsrieder
Health-promoting effects of kefir may be partially caused by bioactive peptides. To evaluate their formation or degradation during gastrointestinal digestion, we monitored changes of the peptide profile in a model of oral (1), gastric (2) and small intestinal (3) digestion of kefir. MALDI-TOF-MS analyses revealed clearly different profiles between digests 2/3 and kefir/digest 1. Subsequent UPLC-ESI-MS/MS identified 92 peptides in total (25, 25, 43, and 30, partly overlapping in kefir and digests 1, 2, and 3, respectively), including 16 peptides with ascribed bioactivity...
February 14, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28193172/comparison-of-pathogenic-and-non-pathogenic-enterococcus-cecorum-strains-from-different-animal-species
#11
Arne Jung, Martin Metzner, Martin Ryll
BACKGROUND: Enterococcus cecorum (EC) infection currently is one of the most important bacterial diseases of modern broiler chickens but can also affect ducks or other avian species. However, little is known concerning pathogenesis of EC and most studies concentrate on examinations of EC strains from broilers only. The objective of this study was to compare pathogenic and commensal EC strains from different animal species concerning different phenotypic and genotypic traits. RESULTS: Pathogenic and commensal EC strains were not clearly separated from each other in a phylogenetic tree based on partial sequences of the 16S-rRNA-gene and also based on the fatty acid profile determined with gas chromatography...
February 13, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28192977/matrix-assisted-laser-desorption-ionization-mass-fingerprinting-for-identification-of-acacia-gum-in-microsamples-from-works-of-art
#12
Clara Granzotto, Ken Sutherland
This paper reports an improved method for the identification of Acacia gum in cultural heritage samples using matrix assisted laser desorption ionization-time-of-flight mass spectrometry (MALDI-TOF MS) after enzymatic digestion of the polysaccharide component. The analytical strategy was optimized using a reference Acacia gum (gum arabic, sp. A. senegal) and provided an unambiguous MS profile of the gum, characterized by specific and recognized oligosaccharides, from as little as 0.1 μg of material. The enhanced experimental approach with reduced detection limit was successfully applied to the analysis of naturally aged (∼80 year) gum arabic samples, pure and mixed with lead white pigment, and allowed the detection of gum arabic in samples from a late painting (1949/1954) by Georges Braque in the collection of the Art Institute of Chicago...
February 15, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28188862/the-ascites-n-glycome-of-epithelial-ovarian-cancer-patients
#13
Karina Biskup, Elena I Braicu, Jalid Sehouli, Rudolf Tauber, Véronique Blanchard
: Epithelial ovarian cancer (EOC) is worldwide the sixth most lethal form of cancer occurring in women. More than one third of ovarian patients have ascites at the time of diagnosis and almost all of them have it when recurrence occurs. Although its effect on tumor cell microenvironment remains poorly understood, its presence is correlated with bad diagnosis. In previous studies, we proposed a novel glycan-based biomarker for the diagnosis of EOC, which showed an improved sensitivity and specificity at any stage of the disease and an improved discrimination between malignant and benign ovarian tumors...
February 8, 2017: Journal of Proteomics
https://www.readbyqxmd.com/read/28187683/proteomics-profiling-of-chimeric-truncated-tissue-plasminogen-activator-producing-chinese-hamster-ovary-cells-cultivated-in-a-chemically-defined-medium-supplemented-with-protein-hydrolysates
#14
Bahareh Azarian, Seyedeh Matin Sajedin, Amin Azimi, Mozhgan Raigani, Behrouz Vaziri, Fatemeh Davami
Background: Culture media enrichment through the addition of protein hydrolysates is beneficial for achieving higher protein expression. Methods: In this study, designing the optimum mixture of four soy and casein-derived hydrolysates was successfully performed by design of experiment and specific productivity increased in all predicted combinations. Protein profile of recombinant CHO (rCHO) cells producing tissue plasminogen activator in a serum-free medium (SFM) supplemented with designed hydrolysate additives was compared to that of rCHO cells cultivated in SFM...
11, 2017: Iranian Biomedical Journal
https://www.readbyqxmd.com/read/28178572/changes-in-the-proteome-of-grapevine-leaves-vitis-vinifera-l-during-long-term-drought-stress
#15
Angelika Król, Stanisław Weidner
The essence of exploring and understanding mechanisms of plant adaptation to environmental stresses lies in the determination of patterns of the expression of proteins, identification of stress proteins and their association with the specific functions in metabolic pathways. To date, little information has been provided about the proteomic response of grapevine to the persistent influence of adverse environmental conditions. This article describes changes in the profile of protein accumulation in leaves of common grapevine (Vitis vinifera L...
January 20, 2017: Journal of Plant Physiology
https://www.readbyqxmd.com/read/28176812/quantification-of-detergents-complexed-with-membrane-proteins
#16
Vincent Chaptal, Frédéric Delolme, Arnaud Kilburg, Sandrine Magnard, Cédric Montigny, Martin Picard, Charlène Prier, Luca Monticelli, Olivier Bornert, Morgane Agez, Stéphanie Ravaud, Cédric Orelle, Renaud Wagner, Anass Jawhari, Isabelle Broutin, Eva Pebay-Peyroula, Jean-Michel Jault, H Ronald Kaback, Marc le Maire, Pierre Falson
Most membrane proteins studies require the use of detergents, but because of the lack of a general, accurate and rapid method to quantify them, many uncertainties remain that hamper proper functional and structural data analyses. To solve this problem, we propose a method based on matrix-assisted laser desorption/ionization mass spectrometry (MALDI-TOF MS) that allows quantification of pure or mixed detergents in complex with membrane proteins. We validated the method with a wide variety of detergents and membrane proteins...
February 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28175948/comparative-proteomic-and-metabolomic-analysis-of-streptomyces-tsukubaensis-reveals-the-metabolic-mechanism-of-fk506-overproduction-by-feeding-soybean-oil
#17
Jun Wang, Huanhuan Liu, Di Huang, Lina Jin, Cheng Wang, Jianping Wen
FK506 (tacrolimus) is a 23-membered polyketide macrolide that possesses powerful immunosuppressant activity. In this study, feeding soybean oil into the fermentation culture of Streptomyces tsukubaensis improved FK506 production by 88.8%. To decipher the overproduction mechanism, comparative proteomic and metabolomic analysis was carried out. A total of 72 protein spots with differential expression in the two-dimensional gel electrophoresis (2-DE) were identified by matrix-assisted laser desorption/ionization time-of-flight/time-of-flight mass spectrometry (MALDI-TOF/TOF-MS), and 66 intracellular metabolites were measured by gas chromatography-mass spectrometer (GC-MS)...
February 7, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28174421/streptomyces-euryhalinus-sp-nov-a-new-actinomycete-isolated-from-a-mangrove-forest
#18
Kaushik Biswas, Jayanta D Choudhury, Riddhi Mahansaria, Malay Saha, Joydeep Mukherjee
A Gram-positive, aerobic, non-motile actinomycete (strain MS 3/20(T)) was isolated from the sediment of the Sundarbans mangrove forest in India. On International Streptomyces Project (ISP) medium 2, the isolate produced yellowish brown to red aerial hyphae that carried spiny-surfaced spores in a retinaculum-apertum arrangement. Whole-cell hydrolysate of the strain contained LL-diaminopimelic acid and galactose. Predominant menaquinones were MK-9(H8) and MK-9(H6). Diagnostic polar lipids were glycolipid, phosphatidylglycerol, phosphatidylethanolamine, phosphatidylcholine, unidentified phospholipid and unidentified amino lipid...
February 8, 2017: Journal of Antibiotics
https://www.readbyqxmd.com/read/28173879/helicobacter-cinaedi-bacteremia-with-cellulitis-in-a-living-donor-kidney-transplant-recipient-identified-by-matrix-assisted-laser-desorption-ionization-time-of-flight-mass-spectrometry-a-case-report
#19
Ai Katsuma, Izumi Yamamoto, Yukiko Tsuchiya, Mayuko Kawabe, Takafumi Yamakawa, Haruki Katsumata, Aki Mafune, Yasuyuki Nakada, Akimitsu Kobayashi, Kentaro Koike, Akihiro Shimizu, Yudo Tanno, Ichiro Ohkido, Nobuo Tsuboi, Seiji Hori, Hiroyasu Yamamoto, Takashi Yokoo
BACKGROUND: Helicobacter cinaedi causes bacteremia and cellulitis, mainly in immunocompromised patients. We report a rare case of H. cinaedi bacteremia with cellulitis in a living-donor kidney transplant recipient identified by matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF MS). A 54-year-old Asian man with IgA nephropathy underwent living-donor kidney transplantation 14 years previously. He was admitted to our hospital for evaluation of fever and multifocal cellulitis...
February 7, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28173805/serum-proteomic-profiles-in-ckcs-with-mitral-valve-disease
#20
Chiara Locatelli, Cristian Piras, Giulia Riscazzi, Isabella Alloggio, Ilaria Spalla, Alessio Soggiu, Viviana Greco, Luigi Bonizzi, Paola Roncada, Paola G Brambilla
BACKGROUND: Myxomatous mitral valve disease (MVD) is the most common acquired heart disease in dogs, and the Cavalier King Charles Spaniel (CKCS) is the most studied breed because of the high prevalence, early onset and hereditary component evidenced in the breed. MVD has different severity levels, and there are many practical limitations in identifying its asymptomatic stages. Proteomic techniques are valuable for studying the proteins and peptides involved in cardiovascular diseases, including the period prior to the clinical onset of the disease...
February 7, 2017: BMC Veterinary Research
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