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Glycosaminoglycans from pig duodenum

B Casu, M Moretti, P Oreste

    Arzneimittel-Forschung
    |January 1, 1980
    PubMed
    Summary
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    Researchers isolated five glycosaminoglycans (GAGs) — heparin, heparan sulfate, dermatan sulfate, chondroitin sulfates, and hyaluronic acid — from pig duodenum extracts. These purified GAGs will be used to study their individual roles in the antilipemic activity of the original extract.

    Area of Science:

    • Biochemistry
    • Pharmacology
    • Analytical Chemistry

    Background:

    • Pig duodenum extracts contain polysaccharides with antilipemic properties.
    • These extracts are complex mixtures, hindering the understanding of individual component contributions.
    • Glycosaminoglycans (GAGs) are a major class of these polysaccharides.

    Purpose of the Study:

    • To isolate and purify individual GAGs from pig duodenum extract.
    • To characterize the purity of the isolated GAGs.
    • To prepare pure GAGs for further biological activity assessment.

    Main Methods:

    • Chromatographic and electrophoretic methods for initial GAG mixture analysis.
    • Fractionation using alkyl-ammonium and copper salts.
    • Purification via repeated complexation, enzymatic, and chemical treatments.

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  • Analysis of purity using electrophoresis and 1H-NMR spectroscopy.

    • Main Results:

    • The duodenal extract was identified as a mixture of heparin, heparan sulfate, dermatan sulfate, chondroitin sulfates, and hyaluronic acid.
    • The relative proportions of these GAGs were determined.
    • Individual GAGs were purified to over 97% purity.
    • Electrophoretic and 1H-NMR analyses confirmed the high purity of isolated GAGs.

    Conclusions:

    • A robust method was developed for the isolation and purification of individual GAGs from a complex biological extract.
    • Highly purified GAG preparations are now available for detailed pharmacological studies.
    • This work lays the foundation for elucidating the specific antilipemic mechanisms of individual duodenal GAGs.