Synthesis of sulfated colominic acids and their interaction with fibroblast growth factors

Megumi Kunou, Masako Koizumi, Kengo Shimizu, Mitsuo Kawase, Kenichi Hatanaka

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)


Colominic acid, an α(2→8)-linked poly(sialic acid), was sulfated and characterized by NMR spectroscopy. During sulfation, the secondary hydroxyl group at C-4 had almost the same reactivity as the primary hydroxyl group at C-9, while the secondary hydroxyl group at C-7 was hardly substituted. Analysis by molecular modeling suggested that the lack of substitution at C-7 was due to a steric hindrance. A mobility shift assay indicated that FGF-2 bound to the sulfated colominic acid. Synthetic sulfated colominic acid potentiated the mitogenic activity of FGFs for fibroblasts in the same manner as heparin. Sulfated colominic acid with a low degree of sulfation was able to potentiate FGF activity. Regardless of the degree of sulfation, sulfated colominic acid-induced cytotoxicity was not observed. It was suggested that the carboxyl groups in sulfated colominic acid cooperate with the sulfate groups to reinforce the interaction with FGFs and to reduce the cytotoxicity of sulfated colominic acids.

Original languageEnglish
Pages (from-to)451-458
Number of pages8
Issue number3
Publication statusPublished - 2000 Jan 1
Externally publishedYes

ASJC Scopus subject areas

  • Bioengineering
  • Biomaterials
  • Polymers and Plastics
  • Materials Chemistry


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