{Reference Type}: Journal Article
{Title}: Polysaccharides with immunomodulating properties from the bark of Parkia biglobosa.
{Author}: Zou YF;Zhang BZ;Inngjerdingen KT;Barsett H;Diallo D;Michaelsen TE;El-Zoubair E;Paulsen BS;
{Journal}: Carbohydr Polym
{Volume}: 101
{Issue}: 0
{Year}: Jan 2014 30
{Factor}: 10.723
{DOI}: 10.1016/j.carbpol.2013.09.082
{Abstract}: The bark of Parkia biglobosa is used in traditional medicine to cure a wide range of illnesses. Polysaccharides were extracted from the bark with 50% ethanol-water, 50°C and 100°C water, and seven active fractions obtained by anion exchange chromatography and gel filtration. The complement fixation and macrophage stimulating activities of the different fractions were determined. The acidic fractions PBEII-I and PBEII-IV were the most active in the complement fixation assay, but the other fractions were also potent compared to the positive control BPII from Biophytum petersianum. Fractions PBEII-I and PBEII-IV were also the most potent fractions in stimulating macrophages to release nitric oxide. Structural studies showed that PBEII-I and PBEII-IV were pectic type polysaccharides, containing arabinogalactan type II structures. The observed differences in biological activities among the seven purified polysaccharide sub-fractions are probably due to differences in monosaccharide compositions, linkage types and molecular sizes.