The effect of Ce(NO3)3 on expression of calpain in rat hepatocyte was studied by means of reverse transcription-polymerase chain reaction (RT-PCR). The result shows that high dose of Ce(NO3)3 (50 mg.kg-1) induces the increase of expression of calpain mRNA, but low dose of Ce(NO3)3 (1 mg.kg-1) does not. Possible mechanism for this phenomenon was discussed.
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