Bioassay Guided Isolation of Polysaccharide Rich Fraction from Myrmecodia Platytyrae and its Bile Acid Binder Property

Bioassay guided isolation was done on the Myrmecodia platytyrae (MyP) extracts in order to find the best extract that can bind with bile acid. The function of bile acid binder is to reduce the reabsorption of bile acid in the intestine so that it will cause the decrease of cholesterol in the blood circulation. The extraction process was started by using different organic solvent such as hexane, toluene, ethyl acetate, ethanol and water. All extracts were tested its bile acid binding properties and the extract gave out highest activity was selected to be fractionated. The result showed that water extract has highest bile acid binding property (75%). Then, fractionation process was performed in order to find the best fraction from water extract that have bile acid binding property. The sub-fractionation processes were continued and the process only focussed to the fraction that has highest bile acid binding property until a white powder with 97.02 % carbohydrate was obtained. The powder was subjected to FTIR and was found to have glycosidic bond as shown by bands at 1141 until 1018 cm-1 which is a character of polysaccharide. The polysaccharide rich fraction was hydrolysed and subjected to HPLC to identify its monosaccharide groups. The result showed the presence of glucose and fructose were found to be among the major monosaccharides. This result suggested that the polysaccharide from MyP water extract with high bile acid binding property was gluco-fructan.