RESUMO
This study aims to establish the isolation and purification method of polysaccharides from medicinal residue of Panax notoginseng (PPN). The structure and protective effect of PPN on myelosuppression mice were investigated. One neutral polysaccharide (NPPN) and five acidic polysaccharides (APPNâ I, APPNâ II-A, APPNâ II-B, APPNâ III-A, and APPNâ III-B) were obtained. The results confirmed that NPPN, APPNâ I and APPNâ II-A are glycan with 1, 4 main chains. APPNâ III-A is a glycan. APPNâ II-B and APPNâ III-B are homogalacturonan pectin with 1, 4 main chains. This study demonstrated that NPPN played a bone marrow protective role in myelosuppression mice induced by cyclophosphamide. NPPN could relieve cell cycle arrest, reduce the apoptosis rate of marrow cells, and improve granulocyte-macrophage colony-stimulating (GM-CSF), thermoplastic polyolefin (TPO) and erythropoietin (EPO) serum level, which contributes to promoting the proliferation of hematopoietic cells.