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Glycobiology, 2001, Vol. 11, No. 1 57-64
© 2001 Oxford University Press

Preparation and inhibitory activity on hyaluronidase of fully O-sulfated hyaluro-oligosaccharides

Atsushi Suzuki, Hidenao Toyoda, Toshihiko Toida and Toshio Imanari1

Faculty of Pharmaceutical Sciences, Chiba University, 1–33, Yayoi, Inage, Chiba 263–8522, Japan

Hyaluronan was partially depolymerized on a large-scale quantity using bacterial hyaluronidase (E.C. 4.2.2.1) for preparation of chemically fully O-sulfated oligosaccharides. The hyaluro-oligosaccharide (HAoligo) mixture obtained by partial digestion was repeatedly applied to low pressure gel permeation chromatographic separation to purify the size-unified oligosaccharide ranged from 4- to 20-mer. The purity and size of each HAoligo was confirmed by using proton nuclear magnetic resonance (1H NMR) spectroscopy, capillary electrophoresis (CE) on normal polarity mode, and a newly established separation method by normal phase chromatography with Amide-80 column. The purified HAoligos ranged 4- to 20-mer were applied to chemically fully O-sulfation. Characterization of chemically fully O-sulfated HAoligos was performed by both chemical compositional analyses after hydrolysis and 1H NMR spectroscopy. While the anti-factor IIa activity of 4- to 20-mer O-sulfated HAoligos was less than 3.1 units/mg, the inhibitory action for hyaluronidase (bovine testicular hyaluronidase (E.C.3.2.1.35)) of the oligosaccharides ranged 16- to 20-mer were corresponding to 79% of that shown by fully O-sulfated hyaluronan (MW 100 kDa) through both competitive and noncompetitive effects.

1 To whom correspondence should be addressed


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