Heparan sulfate containing unsubstituted glucosamine residues: biosynthesis and heparanase-inhibitory activity.
J Biol Chem
; 289(22): 15231-43, 2014 May 30.
Article
em En
| MEDLINE
| ID: mdl-24753252
ABSTRACT
Degradation of heparan sulfate (HS) in the extracellular matrix by heparanase is linked to the processes of tumor invasion and metastasis. Thus, a heparanase inhibitor can be a potential anticancer drug. Because HS with unsubstituted glucosamine residues accumulates in heparanase-expressing breast cancer cells, we assumed that these HS structures are resistant to heparanase and can therefore be utilized as a heparanase inhibitor. As expected, chemically synthetic HS-tetrasaccharides containing unsubstituted glucosamine residues, GlcAß1-4GlcNH3 (+)(6-O-sulfate)α1-4GlcAß1-4GlcNH3 (+)(6-O-sulfate), inhibited heparanase activity and suppressed invasion of breast cancer cells in vitro. Bifunctional NDST-1 (N-deacetylase/N-sulfotransferase-1) catalyzes the modification of N-acetylglucosamine residues within HS chains, and the balance of N-deacetylase and N-sulfotransferase activities of NDST-1 is thought to be a determinant of the generation of unsubstituted glucosamine. We also report here that EXTL3 (exostosin-like 3) controls N-sulfotransferase activity of NDST-1 by forming a complex with NDST-1 and contributes to generation of unsubstituted glucosamine residues.
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Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Neoplasias da Mama
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Sulfotransferases
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Proteoglicanas de Heparan Sulfato
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Glucosamina
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Glucuronidase
Limite:
Animals
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Female
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Humans
Idioma:
En
Ano de publicação:
2014
Tipo de documento:
Article