CONCLUSION: Polysaccharide PY4 could inhibit the proliferation of murine bone marrow cells, spleen cells and thymus cells.There was no distinct effect on mixed lymphocyte reaction.

• 结论：多糖PY4对小鼠骨髓细胞、脾脏淋巴细胞和胸腺淋巴细胞增殖有一定的抑制作用，而对混合淋巴细胞反应没有明显的影响。