The results showed that HELDF cultured in vitro lived up to 52 generations while the culture medium containing 0.2% AMB extract made the cells live up to 77 genera- tions.

• 结果表明；体外培养人胚肺二倍体成纤维细胞成活至52代；而含0.；2%25黄芪制取液的培养基使细胞成活至77代。