The extraction process of EAP was optimized by single factor experiments and RSM.
Two homogeneous polysaccharides EAP-1a and EAP-1b were obtained and characterized.
EAP could activate macrophages and stimulate macrophage to secrete NO.
Effects on macrophages activation were similar between crude EAP and LPS.
EAP had the potential to be developed as natural medicines or health foods.