It was well known that high doses of lanthanons do harm to animal cell
s in various ways. In this paper the reactions between the lanthanons
and the metallothionein(MT) - a heavy metal detoxication protein was s
tudied, The experimental data supported the result that MT can't bind
to lanthanons either in vivo or in votro, In addition, the study prove
d that lanthanons can not introduce the synthesis of MT in rat liver,
even when high doses (0.002% similar to 0.0032%) lanthanum and europiu
m salts were used, The possible reasons were discussed in this paper.