Anti-HIV-1 activity of low molecular weight sulfated chitooligosaccharides

Carbohydrate Research
Murat ArtanSe-Kwon Kim

Abstract

Chitooligosaccharides are nontoxic and water-soluble compounds obtained by enzymatic degradation of chitosan, which is derived from chitin by a deacetylation process. Chitooligosaccharides possess broad range of activities such as antitumour, antifungal, antibacterial activities. Sulfated chitooligosaccharides (SCOSs) with different molecular weights were synthesized by a random sulfation reaction. In the present study, anti-HIV-1 properties of SCOSs and the impact of molecular weight on their inhibitory activity were investigated. SCOS III (MW 3-5 kDa) was found to be the most effective compound to inhibit HIV-1 replication. At nontoxic concentrations, SCOS III exhibited remarkable inhibitory activities on HIV-1-induced syncytia formation (EC(50) 2.19 microg/ml), lytic effect (EC(50) 1.43 microg/ml), and p24 antigen production (EC(50) 4.33 microg/ml and 7.76 microg/ml for HIV-1(RF) and HIV-1(Ba-L), respectively). In contrast, unsulfated chitooligosaccharides showed no activity against HIV-1. Furthermore, it was found that SCOS III blocked viral entry and virus-cell fusion probably via disrupting the binding of HIV-1 gp120 to CD4 cell surface receptor. These results suggest that sulfated chitooligosaccharides represent novel ca...Continue Reading

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Citations

Aug 18, 2010·Marine Drugs·Ratih Pangestuti, Se-Kwon Kim
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