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Glycobiology, 2002, Vol. 12, No. 7 421-426
© 2002 Oxford University Press

Large-scale preparation, purification, and characterization of hyaluronan oligosaccharides from 4-mers to 52-mers

Akira Tawada, Takahiro Masa, Yoji Oonuki, Atsushi Watanabe, Yuji Matsuzaki and Akira Asari1

Seikagaku Corporation, Central Research Laboratories, 1253, Tateno 3-chome, Higshiyamato-shi, Tokyo 207-0021, Japan

Hyaluronan (HA) was depolymerized by partial digestion with testicular hyaluronidase and separated into size-uniform HA oligosaccharides from 4-mers to 52-mers by anion exchange chromatography after removal of the hyaluronidase. The purity and size of each HA oligosaccharide was confirmed by using HPLC analyses, FACE, and ESI-MS. 1H and 13C NMR assignments and elemental analyses were obtained for each HA oligosaccharide. Endotoxins, proteins, and DNA were absent or in trace amounts in these HA oligosaccharides. Gram/mg-scale hyaluronan oligosaccharides were obtained from 200 g of HA starting material. These pure, size-uniform, and large range of HA oligosaccharides will be available for investigating important biological functions of HA, such as for the determination of the size(s) of HA oligosaccharides that induce angiogenesis or mediate inflammatory responses, and to interact with HA-binding proteins and receptors both in in vitro and in vivo studies.

1 To whom correspondence should be addressed; E-mail: asari{at}seikagaku.co.jp


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