Novel chondroitin sulfate having decreased molecular weight...

C - Chemistry – Metallurgy – 08 – B

Patent

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Details

C08B 37/08 (2006.01) A61K 31/737 (2006.01) A61M 1/14 (2006.01) A61M 1/28 (2006.01) A61P 7/08 (2006.01)

Patent

CA 2706254

An object of the present invention is to provide a chondroitin sulfate having a decreased molecular weight which has utilization as an inhibitor of peritoneal disorder caused by long-term use of a peritoneal dialysis fluid containing glucose or a polysaccharide thereof as an osmotic agent, utilization as an osmotic agent in a peritoneal dialysis fluid, and the like. The chondroitin sulfate having a decreased molecular weight of the present invention as a means for achieving the object is characterized by having a weight average molecular weight of from 1000 to 20000 and containing a constituent disaccharide unit represented by the following structural formula in an amount of from 65 % to 100 %(molar ratio) of the total. - [4GlcA.beta.1-3GalNAc ( 6S) .beta.1] - (wherein G1cA represents a D-glucuronic acid residue; GalNAc represents an N-acetyl-D-galactosamine residue; .beta.1-3 represents a .beta.1-3 glycosidic linkage; .beta.1-4 represents a .beta.1-4 glycosidic linkage; and (6S) indicates that position 6 of the monosaccharide residue is sulfated)

L'invention vise à proposer un sulfate de chondroïtine de moindre masse moléculaire utile comme inhibiteur du trouble péritonéal provoqué par l'utilisation prolongée d'un fluide de dialyse péritonéale contenant du glucose ou un polysaccharide de glucose comme substance osmotique, ou comme substance osmotique dans un fluide de dialyse péritonéale. Le sulfate de chondroïtine à moindre masse moléculaire proposé par l'invention comme moyen de résolution est caractérisé en ce qu'il présente une masse moléculaire moyenne en poids de 1 000 à 20 000 et renferme une unité disaccharide constitutive représentée par la formule structurale suivante dans une quantité de 65 % à 100 % (rapport molaire) du total -[4GlcAß1-3GalNAc(6S)ß1]-]. Dans la formule, GlcA représente un reste d'acide D-glucuronique; GalNac représente un reste de N-acétyl-D-galactosamine; ß1-3 représente une liaison glycosidique ß1-3; ß1-4 représente une liaison glycosidique ß1-4; et (6S) indique qu'un groupe en 6ème position du reste de monosaccharide est sulfaté.

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