These results indicate that the incresed expression of CD8,HLA-DR cells and a decreased CD4 CD8 ratio play an important role in the mechanism of aplastic anaemia.

• 本研究的结果表明：CD8~＋、HLA－DR~＋细胞增高及CD4~＋/CD8~＋比值降低在AA患者的发病机制中起着重要作用。