Title : Transient superinducibility of cytochrome P450c (CYP1A1) mRNA and transcription.

Pub. Date : 1989 Jun

PMID : 2766930






4 Functional Relationships(s)
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1 Simultaneous treatment of the rat hepatocyte-derived cell line LCS7 with cycloheximide and polycyclic aromatic compounds increased CYP1A1 (cytochrome P450c) gene transcription rate four- to sixfold and mRNA levels 20-fold relative to the levels in cells treated with inducers alone. Cycloheximide cytochrome P450, family 1, subfamily a, polypeptide 1 Rattus norvegicus
2 Simultaneous treatment of the rat hepatocyte-derived cell line LCS7 with cycloheximide and polycyclic aromatic compounds increased CYP1A1 (cytochrome P450c) gene transcription rate four- to sixfold and mRNA levels 20-fold relative to the levels in cells treated with inducers alone. Cycloheximide cytochrome P450, family 1, subfamily a, polypeptide 1 Rattus norvegicus
3 Thus, treatment with cycloheximide revealed two phases to the response of the CYP1A1 gene to inducer. Cycloheximide cytochrome P450, family 1, subfamily a, polypeptide 1 Rattus norvegicus
4 All of these exhibited elevated levels of CYP1A1 mRNA following simultaneous treatment with inducer and cycloheximide; transcription rate was superinduced three- to fourfold in primary hepatocytes, and CYP1A1 mRNA levels were superinduced 20- to 25-fold in both kidney and lung explants. Cycloheximide cytochrome P450, family 1, subfamily a, polypeptide 1 Rattus norvegicus