The effect of cerium nitrate on expression of CaM Ⅰ and PMCA1b in rat liver was studied by means of reverse transcription-polymerase chain reaction (RT-PCR). The result shows that neither a high dose (50 mg*kg-1) nor a low dose (1 mg*kg-1) of cerium nitrate induces any alterations of expression of CaM Ⅰ and PMCA 1b mRNA after recurrent intraperitoneal injection of cerium nitrate, which suggests that effect of cerium nitrate on CaM and Ca2+-ATPase might be at posttranscription level.
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