Effects of structural modification of calcium spirulan, a sulfated polysaccharide from Spirulina platensis, on antiviral activity

Chem Pharm Bull (Tokyo). 2001 Jan;49(1):108-10. doi: 10.1248/cpb.49.108.


Calcium ion binding with the anionic part of a molecule was replaced with various metal cations and their inhibitory effects on the replication of herpes simplex virus type 1 were evaluated. Replacement of calcium ion with sodium and potassium ions maintained the antiviral activity while divalent and trivalent metal cations reduced the activity. Depolymerization of sodium spirulan with hydrogen peroxide decreased in antiviral activity as its molecular weight decreased.

MeSH terms

  • Antiviral Agents / chemistry*
  • Antiviral Agents / pharmacology*
  • Carbohydrate Conformation
  • Herpesvirus 1, Human / drug effects
  • Microbial Sensitivity Tests
  • Polysaccharides / chemistry*
  • Polysaccharides / pharmacology*
  • Structure-Activity Relationship


  • Antiviral Agents
  • Polysaccharides
  • spirulan