1. A Cytotoxic Antibody Recognizing Lacto-N-fucopentaose I (LNFP I) on Human Induced Pluripotent Stem (hiPS) Cells.

    Journal of Biological Chemistry 290(33):20071 (2015) PMID 26100630 PMCID PMC4536414

    We have generated a mouse monoclonal antibody (R-17F, IgG1 subtype) specific to human induced pluripotent stem (hiPS)/embryonic stem (ES) cells by using a hiPS cell line as an antigen. Triple-color confocal immunostaining images of hiPS cells with R-17F indicated that the R-17F epitope was expre...
  2. Phenotype-based clustering of glycosylation-related genes by RNAi-mediated gene silencing.

    Genes to Cells 20(6):521 (2015) PMID 25940448 PMCID PMC4682476

    Glycan structures are synthesized by a series of reactions conducted by glycosylation-related (GR) proteins such as glycosyltransferases, glycan-modifying enzymes, and nucleotide-sugar transporters. For example, the common core region of glycosaminoglycans (GAGs) is sequentially synthesized by p...
  3. Generation of rat induced pluripotent stem cells using a plasmid vector and possible application of a keratan sulfate glycan recognizing antibody in discriminating teratoma formation phenotypes.

    Biological & Pharmaceutical Bulletin 38(1):127 (2015) PMID 25744468

    Induced pluripotent stem cells (iPSCs) offer an invaluable tool for biological research and regenerative medicine. We report establishment of rat iPSCs (riPSCs) using a plasmid vector encoding four transcription factors, Oct3/4, Sox2, c-Myc and Klf4. Although all riPSC clones were generated and ...
  4. Analysis of Drosophila glucuronyl C5-epimerase: implications for developmental roles of heparan sulfate sulfation compensation and 2-O-sulfated glucuronic acid.

    Journal of Biological Chemistry 288(48):34384 (2013) PMID 24133213 PMCID PMC3843053

    During the biosynthesis of heparan sulfate (HS), glucuronyl C5-epimerase (Hsepi) catalyzes C5-epimerization of glucuronic acid (GlcA), converting it to iduronic acid (IdoA). Because HS 2-O-sulfotransferase (Hs2st) shows a strong substrate preference for IdoA over GlcA, C5-epimerization is requir...
  5. The role of Drosophila heparan sulfate 6-O-endosulfatase in sulfation compensation.

    Journal of Biological Chemistry 288(9):6574 (2013) PMID 23339195 PMCID PMC3585090

    The biosynthesis of heparan sulfate proteoglycans is tightly regulated by multiple feedback mechanisms, which support robust developmental systems. One of the regulatory network systems controlling heparan sulfate (HS) biosynthesis is sulfation compensation. A previous study using Drosophila HS ...
  6. A novel antibody for human induced pluripotent stem cells and embryonic stem cells recognizes a type of keratan sulfate lacking oversulfated structures.

    Glycobiology 23(3):322 (2013) PMID 23154990

    We have generated a monoclonal antibody (R-10G) specific to human induced pluripotent stem (hiPS)/embryonic stem (hES) cells by using hiPS cells (Tic) as an antigen, followed by differential screening of mouse hybridomas with hiPS and human embryonal carcinoma (hEC) cells. Upon western blotting ...
  7. ZG16p, an animal homolog of β-prism fold plant lectins, interacts with heparan sulfate proteoglycans in pancreatic zymogen granules.

    Glycobiology 22(2):258 (2012) PMID 21948871

    ZG16p is a soluble 16 kDa pancreatic protein having structural similarities with plant β-prism fold lectins such as the banana lectin BanLec and the jackfruit lectin jacalin. ZG16p is postulated to be involved in the formation of zymogen granules by interacting with proteoglycans (PGs) localized...
  8. Microdetermination of hyaluronan in human plasma by high-performance liquid chromatography with a graphitized carbon column and postcolumn fluorometric detection.

    Journal of Chromatography B 879(13-14):950 (2011) PMID 21444252

    A chemical method for the determination of hyaluronan (hyaluronic acid, HA) has been developed and applied to the human blood plasma. Human blood plasma HA was converted to the ΔDi-HA by digestion with hyaluronidase SD and determined by a sensitive and selective high-performance liquid chromatog...
  9. The 3'-phosphoadenosine 5'-phosphosulfate transporters, PAPST1 and 2, contribute to the maintenance and differentiation of mouse embryonic stem cells.

    PLoS ONE 4(12):e8262 (2009) PMID 20011239 PMCID PMC2788424

    Recently, we have identified two 3'-phosphoadenosine 5'-phosphosulfate (PAPS) transporters (PAPST1 and PAPST2), which contribute to PAPS transport into the Golgi, in both human and Drosophila. Mutation and RNA interference (RNAi) of the Drosophila PAPST have shown the importance of PAPST-depende...
  10. Functional analysis of proteoglycan galactosyltransferase II RNA interference mutant flies.

    Journal of Biological Chemistry 283(10):6076 (2008) PMID 18165227

    Heparan sulfate proteoglycan plays an important role in developmental processes by modulating the distribution and stability of the morphogens Wingless, Hedgehog, and Decapentaplegic. Heparan and chondroitin sulfates share a common linkage tetrasaccharide structure, GlcAbeta1,3Galbeta1,3Galbeta1...
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  11. Heparan sulfate regulates self-renewal and pluripotency of embryonic stem cells.

    Journal of Biological Chemistry 283(6):3594 (2008) PMID 18024963

    Embryonic stem (ES) cell self-renewal and pluripotency are maintained by several signaling cascades and by expression of intrinsic factors, such as Oct3/4 and Nanog. The signaling cascades are activated by extrinsic factors, such as leukemia inhibitory factor, bone morphogenic protein, and Wnt. ...
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  12. Nucleotide-sugar transporter SLC35D1 is critical to chondroitin sulfate synthesis in cartilage and skeletal development in mouse and human.

    Nature Medicine 13(11):1363 (2007) PMID 17952091

    Proteoglycans are a family of extracellular macromolecules comprised of glycosaminoglycan chains of a repeated disaccharide linked to a central core protein. Proteoglycans have critical roles in chondrogenesis and skeletal development. The glycosaminoglycan chains found in cartilage proteoglycan...
  13. Glycomics of proteoglycan biosynthesis in murine embryonic stem cell differentiation.

    Journal of Proteome Research 6(11):4374 (2007) PMID 17915907 PMCID PMC3973744

    Glycosaminoglycans (GAGs) play a critical role in binding and activation of growth factors involved in cell signaling critical for developmental biology. The biosynthetic pathways for GAGs have been elucidated over the past decade and now analytical methodology makes it possible to determine GAG...
  14. Reduced sulfation of chondroitin sulfate in thyroglobulin derived from human papillary thyroid carcinomas.

    Cancer Science 98(10):1577 (2007) PMID 17645579

    The presence of a chondroitin sulfate (CS) chain on human thyroglobulin (Tg) distinguishes it from Tg of other species; the role played by this chain in normal thyroid function is unclear. In the present study, we determined the structure of the CS oligosaccharides in human thyroid-derived Tg. Q...
  15. Mosquito heparan sulfate and its potential role in malaria infection and transmission.

    Journal of Biological Chemistry 282(35):25376 (2007) PMID 17597060 PMCID PMC2121605

    Heparan sulfate has been isolated for the first time from the mosquito Anopheles stephensi, a known vector for Plasmodium parasites, the causative agents of malaria. Chondroitin sulfate, but not dermatan sulfate or hyaluronan, was also present in the mosquito. The glycosaminoglycans were isolate...
  16. HPLC determination of chondrosine in mouse blood plasma after intravenous or oral dose.

    Biological & Pharmaceutical Bulletin 30(8):1365 (2007) PMID 17666786

    The bioavailability of chondrosine was evaluated by its direct measurement as found in the blood plasma following removal of plasma proteins by perchloric acid. The postcolumn HPLC determination of chondrosine was performed on an SCX column (6 mm i.d.x 150 mm), 0.35 mol/l boric acid (pH 5.2 adju...
  17. Matrix assisted laser desorption ionization-time of flight mass spectrometry analysis of hyaluronan oligosaccharides.

    Analytica Chimica Acta 593(2):207 (2007) PMID 17543609 PMCID PMC4129653

    A new method is presented for the identification of oligosaccharides obtained by enzymatic digestion of hyaluronan (HA) with bacterial hyaluronidase (E.C. 4.2.2.1, from Streptomyces hyalurolyticus) using matrix assisted laser desorption ionization-time of flight mass spectrometry (MALDI-TOFMS). ...
  18. Regulation of heparan sulfate 6-O-sulfation by beta-secretase activity.

    Journal of Biological Chemistry 282(20):14942 (2007) PMID 17363373

    The enzymes involved in glycosaminoglycan chain biosynthesis are mostly Golgi resident proteins, but some are secreted extracellularly. For example, the activities of heparan sulfate 6-O-sulfotransferase (HS6ST) and heparan sulfate 3-O-sulfotransferase are detected in the serum as well in the me...
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  19. Drosophila beta 1,4-N-acetylgalactosaminyltransferase-A synthesizes the LacdiNAc structures on several glycoproteins and glycosphingolipids.

    Biochemical and Biophysical Research Communicat... 354(2):522 (2007) PMID 17239818

    The GalNAcbeta1,4GlcNAc (LacdiNAc or LDN) structure is a more common structural feature in invertebrate glycoconjugates when compared with the Galbeta1,4GlcNAc structure. Recently, beta1,4-N-acetylgalactosaminyltransferase (beta4GalNAcT) was identified in some invertebrates including Drosophila....
  20. Drosophila β1,4-N-acetylgalactosaminyltransferase-A synthesizes the LacdiNAc structures on several glycoproteins and glycosphingolipids

    Biochemical and Biophysical Research Communicat... 354(2):522 (2007)

    The GalNAcβ1,4GlcNAc (LacdiNAc or LDN) structure is a more common structural feature in invertebrate glycoconjugates when compared with the Galβ1,4GlcNAc structure. Recently, β1,4-N-acetylgalactosaminyltransferase (β4GalNAcT) was identified in some invertebrates including Drosophila. H...