Publication date: April 2017
Source:International Journal of Biological Macromolecules, Volume 97
Author(s): Fang Liu, Yinping Wang, Keren Zhang, Yijun Wang, Rong Zhou, Yan Zeng, Yajie Han, Tzi Bun Ng
A novel polysaccharide fraction (G1) was obtained from the fungus Fomitiporia punctata (P. Karst.) Murrill. G1 exhibited a molecular weight of approximately 151kDa. The FT-IR results suggested that the monosaccharide components of G1 possessed furanoid rings and there were β-glycosidic bonds between the sugar units. The1H NMR results showed that G1 was composed of arabinose, fructose, galactose and glucose in the molar ratio of 1.6:3.8:19.7:19.7, as determined by gas chromatography-mass spectrometry (GC–MS) and high performance liquid chromatography (HPLC). G1 produced significant antioxidant effects as evidenced by its potency in inhibiting erythrocyte hemolysis, and in scavenging hydroxyl radicals and superoxide radicals. The highest rates of inhibition achieved were 73.58%, 36.55% and 50.98% respectively. In addition, G1 brought about 19.6% inhibition of HIV-1 protease activity at the concentration of 50μg/mL. G1 displayed inhibitory activity toward HIV-1 integrase in the concentration range of 100–1000μg/mL. The present study indicates that G1 from Fomitiporia punctate (P. Karst.) Murrill is a novel natural antioxidant.
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