Title : Inhibition of PI 3-kinase and RAS blocks IGF-I and insulin-induced uncoupling protein 1 gene expression in brown adipocytes.

Pub. Date : 1998 Jul

PMID : 9618150






2 Functional Relationships(s)
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1 At physiological doses, either insulin-like growth factor I (IGF-I) or insulin turned out to be as potent as dibutyryl cAMP (dbcAMP) in increasing UCP1 gene transcription rate (1 h) and also UCP1 mRNA accumulation (3 h), their maximal effect (15-fold increase) reached upon treatment for 24 h. Upon treatment with either IGF-I or insulin for 48 h, a 7-fold increase in the UCP1 protein content relative to levels in the control cells was found, this induction being abolished in the presence of cycloheximide. Cycloheximide insulin Homo sapiens
2 At physiological doses, either insulin-like growth factor I (IGF-I) or insulin turned out to be as potent as dibutyryl cAMP (dbcAMP) in increasing UCP1 gene transcription rate (1 h) and also UCP1 mRNA accumulation (3 h), their maximal effect (15-fold increase) reached upon treatment for 24 h. Upon treatment with either IGF-I or insulin for 48 h, a 7-fold increase in the UCP1 protein content relative to levels in the control cells was found, this induction being abolished in the presence of cycloheximide. Cycloheximide insulin Homo sapiens