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Zhang Z, Qi X, Chai J, Wu P, Lv X, Cheng S, Li X. Detection of glycan-binding proteins using glycan-functionalized quantum dots and gold nanoparticles. J Carbohydr Chem 2018. [DOI: 10.1080/07328303.2018.1451875] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- Zhenxing Zhang
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Chaoyang District, Beijing, China
- Savaid Medical School, University of Chinese Academy of Sciences, Huairou District, Beijing, China
| | - Xiaoxiao Qi
- Lanzhou Institute of Animal Science and Veterinary Pharmaceutics, Chinese Academy of Agricultural Science, Lanzhou, China
| | - Jinfeng Chai
- School of Materials Science and Engineering, Changchun University of Science and Technology, Weixing Road, Changchun, China
| | - Peixing Wu
- Lanzhou Institute of Animal Science and Veterinary Pharmaceutics, Chinese Academy of Agricultural Science, Lanzhou, China
| | - Xun Lv
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Chaoyang District, Beijing, China
| | - Shuihong Cheng
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Chaoyang District, Beijing, China
| | - Xuebing Li
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Chaoyang District, Beijing, China
- Savaid Medical School, University of Chinese Academy of Sciences, Huairou District, Beijing, China
- Center for Influenza Research and Early-warning (CASCIRE), Chinese Academy of Sciences, Chaoyang District, Beijing, China
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2
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Ahire JH, Behray M, Webster CA, Wang Q, Sherwood V, Saengkrit N, Ruktanonchai U, Woramongkolchai N, Chao Y. Synthesis of Carbohydrate Capped Silicon Nanoparticles and their Reduced Cytotoxicity, In Vivo Toxicity, and Cellular Uptake. Adv Healthc Mater 2015; 4:1877-86. [PMID: 26121084 DOI: 10.1002/adhm.201500298] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2015] [Revised: 06/03/2015] [Indexed: 12/12/2022]
Abstract
The development of smart targeted nanoparticles (NPs) that can identify and deliver drugs at a sustained rate directly to cancer cells may provide better efficacy and lower toxicity for treating primary and advanced metastatic tumors. Obtaining knowledge of the diseases at the molecular level can facilitate the identification of biological targets. In particular, carbohydrate-mediated molecular recognitions using nano-vehicles are likely to increasingly affect cancer treatment methods, opening a new area in biomedical applications. Here, silicon NPs (SiNPs) capped with carbohydrates including galactose, glucose, mannose, and lactose are successfully synthesized from amine terminated SiNPs. The MTT [3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide] analysis shows an extensive reduction in toxicity of SiNPs by functionalizing with carbohydrate moiety both in vitro and in vivo. Cellular uptake is investigated with flow cytometry and confocal fluorescence microscope. The results show the carbohydrate capped SiNPs can be internalized in the cells within 24 h of incubation, and can be taken up more readily by cancer cells than noncancerous cells. Moreover, these results reinforce the use of carbohydrates for the internalization of a variety of similar compounds into cancer cells.
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Affiliation(s)
| | - Mehrnaz Behray
- School of Chemistry; University of East Anglia; Norwich NR4 7TJ UK
| | - Carl A. Webster
- School of Pharmacy; University of East Anglia; Norwich NR4 7TJ UK
| | - Qi Wang
- School of Chemistry; University of East Anglia; Norwich NR4 7TJ UK
| | | | - Nattika Saengkrit
- National Nanotechnology Center (NANOTEC); National Science and Technology Development Agency (NSTDA); Pathumthani 12120 Thailand
| | - Uracha Ruktanonchai
- National Nanotechnology Center (NANOTEC); National Science and Technology Development Agency (NSTDA); Pathumthani 12120 Thailand
| | - Noppawan Woramongkolchai
- National Nanotechnology Center (NANOTEC); National Science and Technology Development Agency (NSTDA); Pathumthani 12120 Thailand
| | - Yimin Chao
- School of Chemistry; University of East Anglia; Norwich NR4 7TJ UK
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3
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Bohara RA, Pawar SH. Innovative Developments in Bacterial Detection with Magnetic Nanoparticles. Appl Biochem Biotechnol 2015; 176:1044-58. [PMID: 25894952 DOI: 10.1007/s12010-015-1628-9] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2014] [Accepted: 04/08/2015] [Indexed: 01/03/2023]
Abstract
It has been seen from the last decade that many bacterial strains are becoming insensitive to conventional detection techniques and it has its own limitations. Current developments in nanoscience and nanotechnology have expanded the ability to design and construct nanomaterials with targeting, therapeutic, and diagnostic functions. These multifunctional nanomaterials have attracted researchers, to be used as the promising tool for selective bacterial sensing applications. An important advantage of using magnetic nanoparticles to capture bacteria is the simple separation of bacteria from biological samples using magnets. This review includes significance of magnetic nanoparticles in bacterial detection. Relevant to topic, properties, designing strategies for magnetic nanoparticle, and innovative techniques used for detection are discussed. This review provides the readers how magnetic properties of nanoparticles can be utilized systematically for bacterial identification.
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Affiliation(s)
- Raghvendra A Bohara
- Center for Interdisciplinary Research, D.Y. Patil University, Kolhapur, 416006, M.S., India,
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4
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Patra A, Bera M. Spectroscopic investigation of new water soluble and complexes for the substrate binding models of xylose/glucose isomerases. Carbohydr Res 2014; 384:87-98. [DOI: 10.1016/j.carres.2013.12.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2013] [Revised: 11/30/2013] [Accepted: 12/03/2013] [Indexed: 11/24/2022]
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5
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Li X, Wu P, Gao GF, Cheng S. Carbohydrate-Functionalized Chitosan Fiber for Influenza Virus Capture. Biomacromolecules 2011; 12:3962-9. [DOI: 10.1021/bm200970x] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Xuebing Li
- CAS Key Laboratory of Pathogenic
Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
| | - Peixing Wu
- Lanzhou Institute of Animal Science
and Veterinary Pharmaceutics, Chinese Academy of Agricultural Science, Lanzhou 730050, China
| | - George F. Gao
- CAS Key Laboratory of Pathogenic
Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
| | - Shuihong Cheng
- CAS Key Laboratory of Pathogenic
Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
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6
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Seo JH, Kim CS, Lee HY, Kawai T, Cha HJ. Interactive Configuration through Force Analysis of GM1 Pentasaccharide-Vibrio cholera Toxin Interaction. Anal Chem 2011; 83:6011-7. [DOI: 10.1021/ac201013p] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Jeong Hyun Seo
- Department of Chemical Engineering, Pohang University of Science and Technology, Pohang 790-784, Korea
| | - Chang Sup Kim
- Department of Chemical Engineering, Pohang University of Science and Technology, Pohang 790-784, Korea
| | - Hea Yeon Lee
- Institute of Scientific and Industrial Research, Osaka University, Osaka 567-0047, Japan
| | - Tomoji Kawai
- Institute of Scientific and Industrial Research, Osaka University, Osaka 567-0047, Japan
| | - Hyung Joon Cha
- Department of Chemical Engineering, Pohang University of Science and Technology, Pohang 790-784, Korea
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Marra A, Moni L, Pazzi D, Corallini A, Bridi D, Dondoni A. Synthesis of sialoclusters appended to calix[4]arene platforms via multiple azide-alkyne cycloaddition. New inhibitors of hemagglutination and cytopathic effect mediated by BK and influenza A viruses. Org Biomol Chem 2008; 6:1396-409. [DOI: 10.1039/b800598b] [Citation(s) in RCA: 76] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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El-Boubbou K, Gruden C, Huang X. Magnetic Glyco-nanoparticles: A Unique Tool for Rapid Pathogen Detection, Decontamination, and Strain Differentiation. J Am Chem Soc 2007; 129:13392-3. [PMID: 17929928 DOI: 10.1021/ja076086e] [Citation(s) in RCA: 340] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Kheireddine El-Boubbou
- Department of Chemistry, The University of Toledo, 2801 West Bancroft Street, MS 602, Toledo, Ohio 43606, Department of Civil Engineering, The University of Toledo, 2801 West Bancroft Street, MS 307, Toledo, Ohio 43606
| | - Cyndee Gruden
- Department of Chemistry, The University of Toledo, 2801 West Bancroft Street, MS 602, Toledo, Ohio 43606, Department of Civil Engineering, The University of Toledo, 2801 West Bancroft Street, MS 307, Toledo, Ohio 43606
| | - Xuefei Huang
- Department of Chemistry, The University of Toledo, 2801 West Bancroft Street, MS 602, Toledo, Ohio 43606, Department of Civil Engineering, The University of Toledo, 2801 West Bancroft Street, MS 307, Toledo, Ohio 43606
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Maierhofer C, Rohmer K, Wittmann V. Probing multivalent carbohydrate-lectin interactions by an enzyme-linked lectin assay employing covalently immobilized carbohydrates. Bioorg Med Chem 2007; 15:7661-76. [PMID: 17892939 DOI: 10.1016/j.bmc.2007.08.063] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2007] [Revised: 08/27/2007] [Accepted: 08/31/2007] [Indexed: 11/19/2022]
Abstract
We report here the synthesis of a series of mono- to trivalent N-acetylglucosamine (GlcNAc) derivatives as ligands for the plant lectin wheat germ agglutinin (WGA). Their WGA binding potencies were determined by an established enzyme-linked lectin assay (ELLA) employing microtiter plates with non-covalently immobilized porcine stomach mucin (PSM) as reference ligand and an ELLA with a new GlcNAc derivative covalently immobilized via a thiourea linkage. Comparison of both assays revealed that the type of presentation of GlcNAc residues on the microtiter plates either as part of a glycoprotein or as a covalently immobilized monosaccharide derivative strongly influences the outcome of the assay. Although the apparent dissociation constants K(D)(ELLA) for the interaction of peroxidase-labeled WGA with the microtiter plates are comparable for both surfaces, IC(50) values obtained with the PSM-free ELLA were substantially lower. Even more strikingly, this ELLA displayed a better differentiation between ligands of different valency leading to significantly higher relative inhibitory potencies of multivalent ligands compared to monovalent. Additionally, problems associated with the use of PSM, such as maximum inhibition at considerably less than 100% and poor reproducibility of IC(50) values could be overcome with this type of ELLA.
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Affiliation(s)
- Caroline Maierhofer
- Universität Konstanz, Fachbereich Chemie, Fach M 709, 78457 Konstanz, Germany
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Cha S, Yeung ES. Colloidal Graphite-Assisted Laser Desorption/Ionization Mass Spectrometry and MSnof Small Molecules. 1. Imaging of Cerebrosides Directly from Rat Brain Tissue. Anal Chem 2007; 79:2373-85. [PMID: 17288467 DOI: 10.1021/ac062251h] [Citation(s) in RCA: 138] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Graphite-assisted laser desorption/ionization (GALDI) mass spectrometry (MS) was investigated for analysis of cerebrosides in a complex total brain lipid extract. Conventional MALDI MS and GALDI MS were compared regarding lipid analysis by using high-vacuum (HV, <10-6 Torr) LDI time-of-flight mass spectrometry and intermediate-pressure (IP, 0.17 Torr) linear ion trap mass spectrometry. Cerebrosides were not detected or detected with low sensitivity in MALDI MS because of other dominant phospholipids. By using GALDI, cerebrosides were detected as intense mass peaks without prior separation from other lipid species while mass peaks corresponding to phosphatidylcholines (PCs) were weak. The signal increase for cerebrosides and the signal decrease for PCs in GALDI MS were more significant in HV than in IP. MSn experiments of precursor ions corresponding to cerebrosides and PCs in brain lipid extract were performed to identify the detected species and distinguish isobaric ions. Twenty-two cerebroside species were detected by GALDI whereas eight cerebroside species were detected by MALDI. Sulfatides in brain lipid extract were also easily detected by GALDI MS in the negative ion mode. By forming a colloidal graphite thin film on rat brain tissue, direct lipid profiling by imaging mass spectrometry (IMS) was performed. Chemically selective images for cerebrosides and sulfatides were successfully obtained. Imaging tandem mass spectrometry (IMS/MS) was performed to generate images of specific product ions from isobaric species.
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Affiliation(s)
- Sangwon Cha
- Ames Laboratory-USDOE and Department of Chemistry, Iowa State University, Ames, Iowa 50011, USA
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Dubber M, Patel A, Sadalapure K, Aumüller I, Lindhorst TK. Synthesis of Functionalized Amphiphilic Glycoconjugates and Glycoclusters. European J Org Chem 2006. [DOI: 10.1002/ejoc.200600612] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Miura T, Okamoto K, Yanase H. Purification and characterization of extracellular 1,2-α-L-fucosidase from Bacillus cereus. J Biosci Bioeng 2005; 99:629-35. [PMID: 16233842 DOI: 10.1263/jbb.99.629] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2005] [Accepted: 04/04/2005] [Indexed: 11/17/2022]
Abstract
Bacillus cereus isolated from a soil sample, inductively produced alpha-L-fucosidase in culture medium containing porcine gastric mucin (PGM). The production of the enzyme was also weakly induced by L-fucose and D-arabinose, but not by other sugars including glucose. The enzyme was purified 61-fold with an overall recovery of 1.8% from the culture fluid supplemented with PGM by ammonium sulfate precipitation, acetone fractionation, and subsequent column chromatography. The purified enzyme was found homogeneous by SDS-PAGE and its molecular mass was estimated to be approximately 196,000 kDa. Its optimum pH was 7.0 and it was stable in the pH range of 5.0 to 9.0. The enzyme hydrolyzed the alpha-(1-->2)-L-fucosidic linkage in oligosaccharides such as Fucalpha1-2Galbeta1-4Glc (2'-fucosyllactose), Fucalpha1-2Galbeta1-3GlcNAcbeta1-3Galbeta1-4Glc (lacto-N-fucopentaose I), and the glycoprotein PGM. The enzyme was inactive on p-nitrophenyl alpha-L-fucoside, the alpha-(1-->3)-L-fucosidic linkages in Galbeta1-4(Fucalpha1-3)GlcNAcbeta1-3Galbeta1-4Glc (lacto-N-fucopentaose III) and orosomucoid, the alpha-(1-->4)-L-fucosidic linkage in Galbeta1-3(Fucalpha1-4)GlcNAcbeta1-3Galbeta1-4Glc (lacto-N-fucopentaose II), and the alpha-(1-->6)-L-fucosidic linkage in thyroglobulin.
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Affiliation(s)
- Toyokazu Miura
- Department of Biotechnology, Faculty of Engineering, Tottori University, 4-101 Koyamacho-Minami, Tottori, Tottori 680-8552, Japan
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Hůlková H, Ledvinová J, Asfaw B, Koubek K, Kopriva K, Elleder M. Lactosylceramide in lysosomal storage disorders: a comparative immunohistochemical and biochemical study. Virchows Arch 2005; 447:31-44. [PMID: 15918012 DOI: 10.1007/s00428-005-1246-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2004] [Accepted: 03/01/2005] [Indexed: 10/25/2022]
Abstract
Immunohistochemical studies of the presence of lactosylceramide (LacCer) in lysosomal storage disorders (LSDs) were done using anti-LacCer monoclonal antibody of the CDw 17 type (clone MG-2). No sign of an association between LacCer and the lysosomal system in normal cells was observed, except for histiocytes active in phagocytosis. A comparative study of a group of LSDs showed a general tendency for LacCer to increase in storage cells in Niemann-Pick disease type C (NPC), and types A and B, GM1 gangliosidosis, acid lipase deficiency, glycogen storage disease type II and mucopolysaccharidoses. LacCer accumulated in storage cells despite normal activity of relevant lysosomal degrading enzymes. The accumulation of LacCer displayed variability within storage cell populations, and was mostly expressed in neurons in NPC. An absence of the increase in LacCer in storage cells above control levels was seen in neuronal ceroid lipofuscinoses (neurons and cardiocytes) and in Fabry disease. Gaucher and Krabbe cells showed significantly lower levels, or even the absence, of LacCer compared with control macrophages. Results of immunohistochemistry were corroborated by semiquantitative lipid thin-layer chromatography (TLC). It is suggested that different associations of LacCer with the lysosomal storage process may reflect differences in glycosphingolipid turnover induced by the storage-compromised lysosomal/endosomal system.
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Affiliation(s)
- H Hůlková
- Institute of Inherited Metabolic Disorders, Charles University, First Faculty of Medicine and University Hospital, Ke Karlovu 2 128 08, 128 08, Prague 2, Czech Republic
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Collins BE, Paulson JC. Cell surface biology mediated by low affinity multivalent protein-glycan interactions. Curr Opin Chem Biol 2005; 8:617-25. [PMID: 15556405 DOI: 10.1016/j.cbpa.2004.10.004] [Citation(s) in RCA: 255] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Glycan-binding proteins mediate diverse aspects of cell biology including pathogen recognition of host cells, cell trafficking, endocytosis and modulation of cell signaling. This is accomplished despite the intrinsic low affinity for their ligands through multivalent interactions that increase effective affinity and adhesive force. Recent successes in the rational design of high-affinity ligands for glycan-binding proteins offer the promise to create well-defined tools for exploring the structure and functions of this class of receptors.
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Affiliation(s)
- Brian E Collins
- Departments of Molecular Biology and Molecular and Experimental Medicine, The Scripps Research Institute, 10550 N. Torrey Pines Rd, MEM L-71, La Jolla, CA 92037, USA.
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Petzold CJ, Leavell MD, Leary JA. Screening and identification of acidic carbohydrates in bovine colostrum by using ion/molecule reactions and Fourier transform ion cyclotron resonance mass spectrometry: specificity toward phosphorylated complexes. Anal Chem 2004; 76:203-10. [PMID: 14697052 DOI: 10.1021/ac034682v] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A screening method was developed for the identification of acidic saccharides from biological mixtures utilizing gas-phase derivatization and mass spectrometry. Phosphorylated compounds were differentiated from other acidic species by exploiting the selective reactivity of chlorotrimethylsilane with the phosphate ions (phosphorylated compounds shift by 72 Da, allowing rapid compound detection). A 13-component mock mixture was used to demonstrate the viability of the method, and a detection limit of 600 nM (30 fmol) was determined. This method was applied to the identification of acidic compounds from bovine colostrum. To further verify the selectivity of the ion/molecule reaction, exact mass measurements were used to determine the elemental composition of 14 compounds. Eight novel acidic carbohydrate species were observed in bovine colostrum, six of which have never been reported previously in milks. Tandem mass spectrometric experiments allowed compound characterization for two of these components.
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Martín MJ, Martín-Sosa S, Alonso JM, Hueso P. Enterotoxigenic Escherichia coli strains bind bovine milk gangliosides in a ceramide-dependent process. Lipids 2003; 38:761-8. [PMID: 14506839 DOI: 10.1007/s11745-003-1124-7] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Diarrhea caused by enterotoxigenic Escherichia coli (ETEC) is the main infectious disease of newborn calves. The first step of infection involves bacterial attachment to the intestinal mucosa. This adhesion is mediated by fimbriae that recognize some glycoconjugates on the host cell surface, in particular, several gangliosides. Because milk also contains gangliosides, these have been suggested to serve as ligands for bacterial fimbriae and thus prevent the bacterial attachment to mucosa. The most relevant ETEC strains in calves, including those with K99 and F41 fimbriae, were assayed to determine whether they are able to bind gangliosides isolated from several stages of bovine lactation. Both GM3 and GD3, the main gangliosides of milk, were recognized by ETEC strains, although the different fimbriae showed diverse levels of affinity. Unexpectedly, the adhesion to colostral gangliosides was considerably weaker than that to gangliosides from the other stages of lactation. Because the carbohydrate moiety did not change and because differences in the percentages of unsaturated FA and sphingosine between colostrum and other stages were observed, we conclude that the differences in adhesion could be due to a different composition of the ganglioside ceramide.
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Affiliation(s)
- María-Jesús Martín
- Departamento de Bioquímica y Biología Molecular, Facultad de Biología, Universidad de Salamanca, 37007 Salamanca, Spain
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Mahfoud R, Mylvaganam M, Lingwood CA, Fantini J. A novel soluble analog of the HIV-1 fusion cofactor, globotriaosylceramide (Gb(3)), eliminates the cholesterol requirement for high affinity gp120/Gb(3) interaction. J Lipid Res 2002; 43:1670-9. [PMID: 12364551 DOI: 10.1194/jlr.m200165-jlr200] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
We have analyzed the interaction of adamantyl Gb(3) (adaGb(3)), a semi-synthetic soluble analog of Gb(3), with HIV-1 surface envelope glycoprotein gp120. In this analog, which was orginally designed to inhibit verotoxin binding to its glycolipid receptor, Gb(3), the fatty acid chain is replaced with a rigid globular hydrocarbon frame (adamantane). Despite its solubility, adaGb(3) forms monolayers at an air-water interface. Compression isotherms of such monolayers demonstrated that the adamantane substitution resulted in a larger minimum molecular area and a more rigid, less compressible film than Gb(3). Insertion of gp120 into adaGb(3) monolayers was exponential whereas the gp120/Gb(3) interaction curve was sigmoidal with a lag phase of 40 min. Adding cholesterol into authentic Gb(3) monolayers abrogated the lag phase and increased the initial rate of interaction with gp120. This effect of cholesterol was not observed with phosphatidylcholine or sphingomyelin. In addition, verotoxin-bound adaGb(3) or Gb(3) plus cholesterol was recovered in fractions of comparable low density after ultracentrifugation through sucrose-density gradients in the presence of Triton X-100. The unique biological and physico-chemical properties of adaGb(3) suggest that this analog may be a potent soluble mimic of Gb(3), providing a novel concept for developing GSL-derived viral fusion inhibitors.
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Affiliation(s)
- Radhia Mahfoud
- Institut Méditerranéen de Recherche en Nutrition, UMR-INRA 1111, Faculté des Sciences St-Jérôme, 13397 Marseille Cedex 20, France
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Ndour CT, Ahmed K, Nakagawa T, Nakano Y, Ichinose A, Tarhan G, Aikawa M, Nagatake T. Modulating effects of mucoregulating drugs on the attachment of Haemophilus influenzae. Microb Pathog 2001; 30:121-7. [PMID: 11273737 DOI: 10.1006/mpat.2000.0417] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Non-typable Haemophilus influenzae (NTHI) is one of the three major pathogens implicated in human respiratory infections. The ability to attach with pharyngeal epithelial cells is an important factor for infection and virulence. In the present study we describe the effects of two mucoregulating drugs, S-carboxymethylcysteine (S-CMC) and ambroxol, on the attachment of NTHI to pharyngeal epithelial cells. There was a significant (P < 0.0001, < 0.001 and <0.01) decrease of attachment (8.8 +/ 2.4, 9.2+/-2.5 and 15.4 +/- 5.7 bactreria/cell) compared with the control (17.5 +/- 2.9, 15.5 +/- 3.1 and 18.8 +/- 6.8 bacteria/cell) after cells were treated wth S-CMC at a dose of 100, 10 and 1 microg/ml. After attachment assay, cells treated with S-CMC (100 microg/ml) showed a significant decrease (P < 0.01) of attached bacteria (3.1 +/- 0.8 bacteria/cell) compared with the control (5.9 +/- 1.8 bacteria/cell). Treatment of cells with ambroxol did not influence bacterial attachment. By scanning electron microscopic observation it was found that NTHI attaches to the surface elevations (microplicae) of human pharyngeal epithelial cells. Atomic force microscopic observation revealed that the surface potential of microplicae decreased significantly in cells treated with S-CMC compared with the untreated control cells. As bacteria with negative surface charge attach to the positively charged domain, i.e. microplicae of human pharyngeal epithelial cells, this study suggests that the decrease of attachment of NTHI with epithelial cells after treatment with S-CMC was possibly due to the decrease of surface charge. This study suggests that S-CMC decreases the episodes of respiratory infections in patients with respiratory diseases both by inhibiting the attachment of bacteria to the upper respiratory tract, and by detaching the adherent one.
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Affiliation(s)
- C T Ndour
- Department of Internal Medicine, Nagasaki University, Nagasaki, 852-8102, Japan
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Abul-Milh M, Barnett Foster D, Lingwood CA. In vitro binding of Helicobacter pylori to monohexosylceramides. Glycoconj J 2001; 18:253-60. [PMID: 11602809 DOI: 10.1023/a:1012460824913] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
H. pylori is the major cause of human gastritis, duodenal ulcer and thus gastric adenocarcinoma. Many glycosphingolipid species have been postulated as receptors for H. pylori and it is likely that H. pylori attachment requires multiple, perhaps sequential receptor/ligand interactions. In this study, the binding of a number of H. pylori clinical isolates, as well as stock strains, to acid and neutral glycosphingolipids separated on thin-layer chromatograms was characterized under microaerobic conditions. All H. pylori clinical isolates, laboratory strains and type culture collection strains recognized galactosylceramide (Galbeta1Cer) with ceramide containing sphingosine and hydroxylated fatty acid (type I), or non-hydroxylated fatty acid (type II), on thin-layer chromatograms and when incorporated into liposomes. The clinical isolates bound stronger to Galbeta1Cer (type II) than Galbeta1Cer (type I) on TLC, whereas lab and culture collection strains showed the opposite binding preference. A clear preference in binding to Galbeta1Cer (type I) incorporated into liposome was shown by most tested strains. Clinical isolates bound well to glucosylceramide (Glcbeta1Cer) with hydroxylated fatty acid, whereas weak binding to this glycolipid was detected with the lab and type collection strains. None of the tested strains bound Glcbeta1Cer with non-hydroxylated fatty acid on the solid surface, but some strains of both clinical or type collection origins showed weak or very weak binding in the liposome assay. A clear distinction between the binding specificity of living organisms (under microaerobic conditions) as opposed to dying organisms (under normoxic conditions) illustrates the importance of cellular physiology in this process. These studies illustrate lipid modulation of the potential receptor function of monohexosylceramides and the distinction between the receptor repertoire of H. pylori clinical isolates and cultured strains commonly used to study host-cell adhesion.
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Affiliation(s)
- M Abul-Milh
- Department of Applied Chemical and Biological Sciences, Ryerson Polytechnic University, 350 Victoria St., Toronto, Ontario, Canada M5B 2K3
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Wittmann V, Seeberger S. Combinatorial Solid-Phase Synthesis of Multivalent Cyclic Neoglycopeptides. Angew Chem Int Ed Engl 2000; 39:4348-4352. [DOI: 10.1002/1521-3773(20001201)39:23<4348::aid-anie4348>3.0.co;2-x] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2000] [Revised: 08/04/2000] [Indexed: 11/06/2022]
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Ukkonen P, Varis K, Jernfors M, Herva E, Jokinen J, Ruokokoski E, Zopf D, Kilpi T. Treatment of acute otitis media with an antiadhesive oligosaccharide: a randomised, double-blind, placebo-controlled trial. Lancet 2000; 356:1398-402. [PMID: 11052582 DOI: 10.1016/s0140-6736(00)02843-9] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
BACKGROUND Antiadhesive compounds are promising candidates for prevention or treatment of infections. We have investigated the efficacy of such an agent, 3'-sialyllacto-N-neotetraose (NE-1530), given intranasally for prophylaxis of acute otitis media and for effect on nasopharyngeal carriage of bacteria. METHODS We did a randomised, double-blind placebo-controlled study at one study site. 507 healthy children were randomly assigned either NE-1530 (n=254) or placebo (253) as intranasal sprays twice daily during 3 months. The children were examined by the study physicians once a month and during illness. Treatment efficacy was estimated from Cox proportional hazards model. A sample of nasopharyngeal secretion was taken at every visit for culture of Streptococcus pneumoniae, Haemophilus influenzae, and Moraxella catarrhalis. Adverse events were recorded in study diaries. FINDINGS At least one event of acute otitis media was diagnosed in 108 (43%) of 254 children in the NE-1530 group and in 86 (34%) of 253 children in the placebo group. The efficacy of treatment was negative, -27% (95% CI -68 to 5; p=0.10). The nasopharyngeal carriage of S pneumoniae, H. influenzae, and M. catarrhalis was not affected by treatment, and the adverse event profiles were almost identical for NE-1530 and placebo. INTERPRETATION NE-1530 did not have a beneficial effect on the occurrence of acute otitis media or on the nasopharyngeal carriage of bacteria in children.
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Affiliation(s)
- P Ukkonen
- National Public Health Institute, Helsinki, Finland.
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Sujino K, Uchiyama T, Hindsgaul O, Seto NOL, Wakarchuk WW, Palcic MM. Enzymatic Synthesis of Oligosaccharide Analogues: Evaluation of UDP-Gal Analogues as Donors for Three Retaining α-Galactosyltransferases. J Am Chem Soc 2000. [DOI: 10.1021/ja990964u] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Keiko Sujino
- Contribution from the Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2 Canada, The Noguchi Institute, 1-8-1, Kaga, Itabashi-ku, Tokyo 173-0003 Japan, and Institute for Biological Sciences, National Research Council of Canada, 100 Sussex Drive, Ottawa, Ontario, K1A 0R6, Canada
| | - Taketo Uchiyama
- Contribution from the Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2 Canada, The Noguchi Institute, 1-8-1, Kaga, Itabashi-ku, Tokyo 173-0003 Japan, and Institute for Biological Sciences, National Research Council of Canada, 100 Sussex Drive, Ottawa, Ontario, K1A 0R6, Canada
| | - Ole Hindsgaul
- Contribution from the Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2 Canada, The Noguchi Institute, 1-8-1, Kaga, Itabashi-ku, Tokyo 173-0003 Japan, and Institute for Biological Sciences, National Research Council of Canada, 100 Sussex Drive, Ottawa, Ontario, K1A 0R6, Canada
| | - Nina O. L. Seto
- Contribution from the Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2 Canada, The Noguchi Institute, 1-8-1, Kaga, Itabashi-ku, Tokyo 173-0003 Japan, and Institute for Biological Sciences, National Research Council of Canada, 100 Sussex Drive, Ottawa, Ontario, K1A 0R6, Canada
| | - Warren W. Wakarchuk
- Contribution from the Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2 Canada, The Noguchi Institute, 1-8-1, Kaga, Itabashi-ku, Tokyo 173-0003 Japan, and Institute for Biological Sciences, National Research Council of Canada, 100 Sussex Drive, Ottawa, Ontario, K1A 0R6, Canada
| | - Monica M. Palcic
- Contribution from the Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2 Canada, The Noguchi Institute, 1-8-1, Kaga, Itabashi-ku, Tokyo 173-0003 Japan, and Institute for Biological Sciences, National Research Council of Canada, 100 Sussex Drive, Ottawa, Ontario, K1A 0R6, Canada
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Sears P, Wong CH. Kohlenhydratmimetika: ein neuer Lösungsansatz für das Problem der kohlenhydratvermittelten biologischen Erkennung. Angew Chem Int Ed Engl 1999. [DOI: 10.1002/(sici)1521-3757(19990816)111:16<2446::aid-ange2446>3.0.co;2-4] [Citation(s) in RCA: 81] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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