Pretreatment procedure for the microdetermination of chondroitin sulfate in plasma and urine

Anal Biochem. 2002 Mar 15;302(2):169-74. doi: 10.1006/abio.2001.5545.

Abstract

A new, simple, and rapid pretreatment method for the determination of chondroitin sulfate, dermatan sulfate, and hyaluronan from urine and blood plasma samples has been developed. Plasma proteins were first converted into small peptides by digestion using a nonspecific protease, actinase E, and the resulting small peptides were removed by centrifugal filtration. The retained, residual crude glycosaminoglycans, including chondroitin/dermatan sulfates and hyaluronan, were converted into unsaturated disaccharides through the action of chondroitin sulfate lyses. Next, these disaccharides were recovered and purified using centrifugal filtration together with DeltaDi-UA2S, added as an internal standard. The filtered disaccharide mixture was analyzed by HPLC with fluorometric postcolumn derivatization using 2-cyanoacetamide as a fluorogenic reagent. This method was applied to a pharmacokinetic study of chondroitin sulfate administered intravenously to mice. The half-life of the administered chondroitin sulfates, having molecular masses from 6 to 50 kDa, varied depending on their molecular sizes. This new method should be useful for studies on the metabolic fate of exogenously administered glycosaminoglycans in small experimental animals.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Chondroitin Lyases / metabolism*
  • Chondroitin Sulfates / blood*
  • Chondroitin Sulfates / pharmacokinetics
  • Chondroitin Sulfates / urine
  • Chromatography, High Pressure Liquid / methods
  • Dermatan Sulfate / blood*
  • Dermatan Sulfate / urine
  • Disaccharides / analysis*
  • Disaccharides / metabolism
  • Filtration / methods
  • Glycosaminoglycans / blood
  • Glycosaminoglycans / urine
  • Half-Life
  • Hyaluronic Acid / blood*
  • Hyaluronic Acid / urine
  • Injections, Intravenous / methods
  • Male
  • Mice

Substances

  • Disaccharides
  • Glycosaminoglycans
  • glucosaminoglycans
  • Dermatan Sulfate
  • Hyaluronic Acid
  • Chondroitin Sulfates
  • Chondroitin Lyases