Abstract
A water-soluble polysaccharide, named as SNP, was extracted and fractioned from the body wall of Sipunculus nudus L. by DEAE-Sepharose anion exchange and Sepharose CL-6B column chromatography. The evaluation for anti-hypoxia activity demonstrated that SNP had significant anti-hypoxic activity on normobarie hypoxia, chemical intoxicant hypoxia and acute cerebral ischemia hypoxia models in mice. SNP also enhanced the number of red blood cell count (RBC) and the concentration of hemoglobin (HGB). The structural characteristics of SNP investigated by high performance size exclusion chromatography, Fourier transform infrared spectroscopy and gas chromatography–mass spectrometry indicated that SNP was a homogeneous polysaccharide with a molecular mass of 350kD and was composed of rhamnose (28%), fucose (16%) and galactose (56%). The results suggested that SNP could be explored as a novel potential anti-hypoxia agent.
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