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https://www.readbyqxmd.com/read/28222448/acute-effects-of-viral-exposure-on-p-glyco-protein-function-in-the-mouse-fetal-blood-brain-barrier
#1
Enrrico Bloise, Sophie Petropoulos, Majid Iqbal, Alisa Kostaki, Tania Maria Ortiga-Carvalho, William Gibb, Stephen G Matthews
BACKGROUND/AIMS: Viral infection during pregnancy is known to affect the fetal brain. The toll-like receptor (TLR)-3 is a pattern recognition receptor activated by viruses known to elicit adverse fetal neurological outcomes. The P-glycoprotein (P-gp) efflux transporter protects the developing fetus by limiting the transfer of substrates across both the placenta and the fetal blood-brain barrier (BBB). As such, inhibition of P-gp at these blood-barrier sites may result in increased exposure of the developing fetus to environmental toxins and xenobiotics present in the maternal circulation...
February 22, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28221766/proteoform-profile-mapping-of-the-human-serum-complement-component-c9-reveals-unexpected-new-features-of-n-o-and-c-glycosylation
#2
Vojtech Franc, Yang Yang, Albert J R Heck
The human complement C9 protein (~65 kDa) is a member of the complement pathway. It plays an essential role in the membrane attack complex (MAC), which forms a lethal pore on the cellular surface of pathogenic bacteria. Here, we charted in detail the structural micro-heterogeneity of C9 purified from human blood serum, using an integrative workflow combining high-resolution native mass spectrometry and (glyco)peptide-centric proteomics. The proteoform profile of C9 was acquired by high-resolution native mass spectrometry, which revealed the co-occurrence of ~50 distinct MS signals...
February 21, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28199092/application-of-a-quantitative-lc-ms-multi-attribute-method-for-monitoring-site-specific-glycan-heterogeneity-on-a-monoclonal-antibody-containing-two-n-linked-glycosylation-sites
#3
Tian Wang, Lily Chu, Wenzhou Li, Kenneth A Lawson, Izydor Apostol, Tamer Eris
A significant challenge of traditional glycan mapping techniques is that they do not provide site-specific glycosylation information. Therefore, for proteins containing multiple glycosylation sites, the individual glycan species present at a particular site cannot be differentiated from those species present at the other glycosylation sites on the molecule. Quantification of glyco-form has previously been demonstrated using a multi-attribute method (MAM), which can quantify multiple post-translational modifications including deamidation, oxidation, glycosylation variants, and fragmentation1...
February 15, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28177483/glyco-forum
#4
(no author information available yet)
No abstract text is available yet for this article.
March 4, 2017: Glycobiology
https://www.readbyqxmd.com/read/28160363/establishment-of-a-tobacco-by2-cell-line-devoid-of-plant-specific-xylose-and-fucose-as-a-platform-for-the-production-of-biotherapeutic-proteins
#5
Uri Hanania, Tami Ariel, Yoram Tekoah, Liat Fux, Maor Sheva, Yehuda Gubbay, Mara Weiss, Dina Oz, Yaniv Azulay, Albina Turbovski, Yehava Forster, Yoseph Shaaltiel
Plant produced glycoproteins contain N-linked glycans with plant-specific residues of β(1,2)-xylose and core α(1,3)-fucose, which do not exist in mammalian derived proteins. Although our experience with two enzymes that are used for enzyme replacement therapy (ERT) does not indicate that the plant sugar residues have deleterious effects, we made a conscious decision to eliminate these moieties from plant-expressed proteins. We knocked out the β(1,2)-xylosyltranferase (XylT) and the α(1,3)-fucosyltransferase (FucT) genes, using CRISPR/Cas9 genome editing, in Nicotiana...
February 3, 2017: Plant Biotechnology Journal
https://www.readbyqxmd.com/read/28134389/glyco-functionalized-dinuclear-rhenium-i-complexes-for-cell-imaging
#6
Alessandro Palmioli, Alessandro Aliprandi, Dedy Septiadi, Matteo Mauro, Anna Bernardi, Luisa De Cola, Monica Panigati
The design, synthesis and photophysical characterization of four new luminescent glycosylated luminophores based on dinuclear rhenium complexes, namely Glyco-Re, are described. The derivatives have the general formula [Re2(μ-Cl)2(CO)6(μ-pydz-R)] (R-pydz = functionalized 1,2-pyridazine), where a sugar residue (R) is covalently bound to the pyridazine ligand in the β position. Different synthetic pathways have been investigated including the so-called neo-glycorandomization procedure, affording stereoselectively glyco-conjugates containing glucose and maltose in a β anomeric configuration...
January 30, 2017: Organic & Biomolecular Chemistry
https://www.readbyqxmd.com/read/28122943/unlocking-cancer-glycomes-from-histopathological-formalin-fixed-and-paraffin-embedded-ffpe-tissue-microdissections
#7
Hannes Hinneburg, Petra Korać, Falko Schirmeister, Slavko Gasparov, Peter H Seeberger, Vlatka Zoldoš, Daniel Kolarich
N- and O-glycans are attractive clinical biomarkers as glycosylation changes in response to diseases. The limited availability of defined clinical specimens impedes glyco-biomarker identification and validation in large patient cohorts. Formalin-fixed paraffin-embedded (FFPE) clinical specimens are the common form of sample preservation in clinical pathology, but qualitative and quantitative N- and O-glycomics of such samples has not been feasible to date. Here, we report a highly sensitive and glycan isomer selective method for simultaneous N- and O-glycomics from histopathological slides...
January 25, 2017: Molecular & Cellular Proteomics: MCP
https://www.readbyqxmd.com/read/28121145/probing-carbocatalytic-activity-of-carbon-nanodots-for-the-synthesis-of-biologically-active-dihydro-spiro-glyco-quinazolinones-and-aza-michael-adducts
#8
Biju Majumdar, Sonam Mandani, Tamalika Bhattacharya, Daisy Sarma, Tridib K Sarma
Herein, we report the fluorescent carbon dots as an effective and recyclable carbocatalyst for the generation of carbon-heteroatom bond leading to quinazolinone derivatives and aza-Michael adducts under mild reaction conditions. The results establish this nanoscale form of carbon as an alternative carbocatalyst for important acid catalyzed organic transformations. The mild surface acidity of carbon dots imparted by -COOH functionality could effectively catalyze the formation of synthetically challenging spiro/glycoquinazolinones under the present reaction conditions...
February 8, 2017: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/28102941/synthesis-of-primaquine-glyco-conjugates-as-potential-tissue-schizontocidal-antimalarial-agents
#9
Chandra S Azad, Mridula Saxena, Arif J Siddiqui, Jyoti Bhardwaj, Sunil K Puri, Guru P Dutta, Nity Anand, Anil K Saxena
Primaquine (PQ) is the only drug used to prevent relapse of malaria due to P. vivax and P. ovale, by eradicating the dormant liver form of the parasite (hypnozoites). The side effects associated with PQ limits is uses in treatment of malaria. To overcome the premature oxidative deamination and to increase the life span of drug in the biological system the novel glyco-conjugates of PQ were synthesized by coupling of primaquine with hexoses in phosphate buffer. The saccharide part of the hybrid molecules thought to be direct the drug to the liver, where hypnozoites resides...
January 19, 2017: Chemical Biology & Drug Design
https://www.readbyqxmd.com/read/28101612/abolishment-of-n-glycan-mannosylphosphorylation-in-glyco-engineered-saccharomyces-cerevisiae-by-double-disruption-of-mnn4-and-mnn14-genes
#10
Yeong Hun Kim, Ji-Yeon Kang, Jin Young Gil, Sang-Yoon Kim, Keun Koo Shin, Hyun Ah Kang, Jeong-Yoon Kim, Ohsuk Kwon, Doo-Byoung Oh
Mannosylphosphorylated glycans are found only in fungi, including yeast, and the elimination of mannosylphosphates from glycans is a prerequisite for yeast glyco-engineering to produce human-compatible glycoproteins. In Saccharomyces cerevisiae, MNN4 and MNN6 genes are known to play roles in mannosylphosphorylation, but disruption of these genes does not completely remove the mannosylphosphates in N-glycans. This study was performed to find unknown key gene(s) involved in N-glycan mannosylphosphorylation in S...
January 18, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28092404/metformin-versus-myoinositol-which-is-better-in-obese-pcos-patients-a-randomized-controlled-crossover-study
#11
Valeria Tagliaferri, Daniela Romualdi, Valentina Immediata, Simona De Cicco, Christian Di Florio, Antonio Lanzone, Maurizio Guido
CONTEXT: due to the central role of metabolic abnormalities in the pathophysiology of PCOS, insulin sensitising agents have been proposed as a feasible treatment option. OBJECTIVE: to investigate which is the more effective between metformin and myoinositol on hormonal, clinical and metabolic parameters in obese patients with polycystic ovary syndrome (PCOS). STUDY DESIGN: crossover randomized-controlled study. PATIENTS: Thirty-four PCOS obese women (age: 25...
January 16, 2017: Clinical Endocrinology
https://www.readbyqxmd.com/read/28078490/podocalyxin-as-a-major-pluripotent-marker-and-novel-keratan-sulfate-proteoglycan-in-human-embryonic-and-induced-pluripotent-stem-cells
#12
REVIEW
Hidenao Toyoda, Yuko Nagai, Aya Kojima, Akiko Kinoshita-Toyoda
Podocalyxin (PC) was first identified as a heavily sialylated transmembrane protein of glomerular podocytes. Recent studies suggest that PC is a remarkable glycoconjugate that acts as a universal glyco-carrier. The glycoforms of PC are responsible for multiple functions in normal tissue, human cancer cells, human embryonic stem cells (hESCs), and human induced pluripotent stem cells (hiPSCs). PC is employed as a major pluripotent marker of hESCs and hiPSCs. Among the general antibodies for human PC, TRA-1-60 and TRA-1-81 recognize the keratan sulfate (KS)-related structures...
January 11, 2017: Glycoconjugate Journal
https://www.readbyqxmd.com/read/28075053/synthesis-characterization-and-immunological-evaluation-of-self-adjuvanting-group-a-streptococcal-vaccine-candidates-bearing-various-lipidic-adjuvanting-moieties
#13
Vincent Fagan, Waleed M Hussein, Mei Su, Ashwini K Gidda, Michael R Batzloff, Michael F Good, Istvan Toth, Pavla Simerska
Four group A streptococcal glyco-lipopeptide vaccine candidates were prepared and characterized, each possessing different lipidic adjuvanting moieties. The immunogenicity of the compounds was evaluated by macrophage and dendritic cell uptake studies and by in vivo quantification of systemic IgG antibody using ELISA. Three of the four vaccine candidates showed a significant induction of IgG response compared to a negative control.
January 11, 2017: Chembiochem: a European Journal of Chemical Biology
https://www.readbyqxmd.com/read/28057734/glyco-forum
#14
EDITORIAL
(no author information available yet)
No abstract text is available yet for this article.
January 2017: Glycobiology
https://www.readbyqxmd.com/read/28031294/glyco-forum
#15
EDITORIAL
(no author information available yet)
No abstract text is available yet for this article.
January 2017: Glycobiology
https://www.readbyqxmd.com/read/28009977/glycan-microarray-reveal-the-sweet-side-of-cancer-vaccines
#16
Vered Padler-Karavani
Advances in genomics and bioinformatics facilitated identification of tumor-specific neoantigens as optimal targets for cancer immunotherapy. In this hot topic, most efforts focus on mutant peptide antigens, overlooking tumor-associated glycosylation changes. Given the latest progress in glycomics, in this issue of Cell Chemical Biology, Xia et al. (2016) use glyco-antigen microarrays to investigate immune responses to whole cancer vaccines and provide important insights into vaccine efficacy.
December 22, 2016: Cell Chemical Biology
https://www.readbyqxmd.com/read/28007619/malignant-mesothelioma-biomarkers-from-discovery-to-use-in-clinical-practise-for-diagnosis-monitoring-screening-and-treatment
#17
REVIEW
Jenette Creaney, Bruce W S Robinson
Malignant pleural mesothelioma is a highly aggressive tumour associated with asbestos exposure. There are few effective treatment options for mesothelioma and patients have a very poor prognosis with a median survival of less than 12 months from diagnosis. Biomarkers have been proposed as a cost-effective means of cancer management and the search for a mesothelioma biomarker has been on-going for the past thirty years. Many traditional soluble (glyco)-protein biomarkers have been evaluated over this time and an ever increasing list of new biomarkers, including mRNA, DNA, miRNA and antibodies, are being reported from biomarker discovery projects...
December 19, 2016: Chest
https://www.readbyqxmd.com/read/28003855/activation-of-ice-recrystallization-inhibition-activity-of-poly-vinyl-alcohol-using-a-supramolecular-trigger
#18
Daniel J Phillips, Thomas R Congdon, Matthew I Gibson
Antifreeze (glyco)proteins (AF(G)Ps) have potent ice recrystallisation inhibition (IRI) activity - a desirable phenomenon in applications such as cryopreservation, frozen food and more. In Nature AF(G)P activity is regulated by protein expression levels in response to an environmental stimulus; temperature. However, this level of regulation is not possible in synthetic systems. Here, a synthetic macromolecular mimic is introduced, using supramolecular assembly to regulate activity. Catechol-terminated poly(vinyl alcohol) was synthesised by RAFT polymerization...
March 7, 2016: Polymer Chemistry
https://www.readbyqxmd.com/read/27984693/global-n-glycan-site-occupancy-of-hiv-1-gp120-by-metabolic-engineering-and-high-resolution-intact-mass-spectrometry
#19
Weston B Struwe, Alexandra Stuckmann, Anna-Janina Behrens, Kevin Pagel, Max Crispin
A vital step in HIV vaccine development strategies has been the observation that some infected individuals generate broadly neutralizing antibodies that target the glycans on the surface of HIV-1 gp120. These antibodies target glycan epitopes on viral envelope spikes, and yet the positions and degree of occupancy of glycosylation sites is diverse. Therefore, there is a need to understand glycosylation occupancy on recombinant immunogens. The sheer number of potential glycosylation sites and degree of chemical heterogeneity impedes assessing the global sequon occupancy of gp120 glycoforms...
January 9, 2017: ACS Chemical Biology
https://www.readbyqxmd.com/read/27984039/glycolipids-and-lectins-in-endocytic-uptake-processes
#20
REVIEW
Ludger Johannes, Christian Wunder, Massiullah Shafaq-Zadah
A host of endocytic processes has been described at the plasma membrane of eukaryotic cells. Their categorization has most commonly referenced cytosolic machinery, of which the clathrin coat has occupied a preponderant position. In what concerns intra-membrane constituents, the focus of interest has been on phosphatidylinositol lipids and their capacity to orchestrate endocytic events on the cytosolic leaflet of the membrane. The contribution of extracellular determinants to the construction of endocytic pits has received much less attention, depite the fact that (glyco)sphingolipids are exoplasmic leaflet fabric of membrane domains, termed rafts, whose contributions to predominantly clathrin-independent internalization processes is well recognized...
October 27, 2016: Journal of Molecular Biology
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