Abstract
Rigidoporus ulmarius is used as a medicinal fungus in Asia. Three isolates (denoted #61, #62, and #63) of R. ulmarius were collected, and their biological activities were evaluated. Extracted polysaccharides from isolate #63 showed greater inhibition activity compared to isolates #61 and #62 in an in vitro endothelial cell tube formation assay, a standard evaluation of angiogenesis. The polysaccharides and ethanolic extract of isolate #63 dose-dependently suppressed the production of the interferon (IFN)-γ-induced inflammation marker, IP-10. Chemical analyses of the polysaccharides revealed that isolate #63 contained the highest value of fucose at a concentration of 59.1 ± 1.2 μmol/g polysaccharide. These results suggest that fucose-containing polysaccharides may play a role in the inhibitory effect. Isolate #63 showed the highest values of ADP among the three isolates in the ethanolic extract. These results suggest that different isolates from R. ulmarius exhibit different abilities to regulate antiangiogenic and anti-inflammatory processes.
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