Sulfated polysaccharides are known to display activity against enveloped viruses, such as herpes and dengue. The aim of this work was to assess the antiviral activity of botryosphaeran, a fungal exocellular (1 → 3)(1 → 6)-β-d-glucan devoid of sulfate groups, and its chemically sulfonated derivatives, against herpes simplex virus (HSV), dengue virus (DENV) and poliovirus (PV). The natural parent polysaccharide inhibited acyclovir-sensitive HSV (HSV-KOS) infection in Vero cells (IC of 39.
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