Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: EC:3.2.1.36 (hyaluronidase)
 4,606 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Bovine testicular hyaluronidase (endo-beta-N-acetyl hexosaminidase) has a significant corrective effect on cultured Hurler fibroblasts. Nonspecificity of this effect is indicated by its equally strong corrective effect on Hunter fibroblasts. Although all specimens of hyaluronidase also possessed iduronidase activity, a separate corrective effect could be attributed to the endo-N-acetyl hexosaminidase activity of at least one hyaluronidase (Wyeth M-151) for four reasons: (i) its very low content of iduronidase activity; (ii) a decrease in intracellular macromolecular mucopolysaccharides (believed to be largely dermatan sulfate) with a corresponding increase in intracellular and extracellular oligosaccharides; (iii) no measurable increase in iduronidase activity of hyaluronidase-treated cells despite near maximal correction; (iv) direct correlation between Hurler cell correction and hyaluronidase activity when enzymes of different strength were used at less than maximal correction.
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PMID:In vitro correction of Hurler fibroblasts with bovine testicular hyaluronidase. 13 20

We isolated mucin-like glycoproteins from the conditioned medium of primary hamster tracheal epithelial (HTE) cell culture and characterized them biochemically and immunologically. These glycoproteins were purified on Sepharose CL-4B after Streptomyces hyaluronidase treatment and then by CsCl-density-gradient centrifugation in the presence of 4 M-guanidinium chloride. The purified glycoproteins were resistant to digestion by chondroitin AC lyase, heparinase, heparitinase and endo-N-acetylglucosaminidases A, D and H, but susceptible to endo-beta-galactosidase and keratanase. SDS/PAGE demonstrated no contamination by low-molecular-mass proteins. The purified glycoproteins showed a peak buoyant density of 1.56 g/ml in CsCl-density-gradient centrifugation, and contained 10% peptide and 90% carbohydrate by weight. Carbohydrates in these glycoproteins contained N-acetylglucosamine, N-acetylgalactosamine, galactose, fucose, sialic acid and a trace amount of mannose, but no uronic acid. Serine and threonine together accounted for 27% of the total amino acid residues. In addition, the mucin-like glycoproteins exhibited blood-group A and B activities, and very strong inhibitory activity for influenza A virus haemagglutination. With the use of the purified glycoprotein as an antigen, six monoclonal antibodies that stained mucus granules in hamster tracheal epithelium were obtained. We characterized the antibody produced by one of the clones, HM D46. We conclude that HTE cells cultured in the serum-free medium secrete a glycoprotein with physicochemical properties similar to those known in various airways mucins.
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PMID:Mucin-like glycoprotein secreted by cultured hamster tracheal epithelial cells. Biochemical and immunological characterization. 165