近年来关于稀土元素生物效应的研究日趋广泛深入 ,尤其是关于稀土抑瘤作用及其机制的研究取得了很大进展[1,2 ] 。肿瘤的生成是受到多种因素的影响 ,而机体免疫功能的降低 ,使肿瘤逃脱机体免疫系统的监视 ,对肿瘤的生长和发展无疑是重要的一个方面。多方研究表明 ,稀土在一定的 In recent years, researches on the biological effects of rare earth elements have become more and more extensive, especially the research on the anti-tumor effect and mechanism of rare earths has made great progress [1,2]. Tumor formation is affected by many factors, and the reduction of immune function makes the tumor escape the surveillance of the immune system of the body, which is undoubtedly an important aspect of tumor growth and development. Multi-party research shows that rare earths in certain