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Glucocorticoids and cyclic AMP synergistically regulate the abundance of preproenkephalin messenger RNA in neuroblastoma-glioma hybrid cells.

作者信息

Yoshikawa K, Sabol S L

出版信息

Biochem Biophys Res Commun. 1986 Aug 29;139(1):1-10. doi: 10.1016/s0006-291x(86)80071-7.

DOI:10.1016/s0006-291x(86)80071-7
PMID:3021119
Abstract

Regulation of preproenkephalin gene expression was studied in NG108-15 neuroblastoma-glioma hybrid cells. Untreated cells contain 20-120 fg preproenkephalin mRNA per microgram cellular RNA. Treatment of cells with a glucocorticoid (e.g. dexamethasone) for 24 hr or 8 days elevated the abundance of this mRNA to 3 or 9 times the control, respectively. Treatment with 8-bromo-cyclic AMP or an adenylate cyclase activator such as prostaglandin E1 or forskolin elevated preproenkephalin mRNA to twice the control or less. Treatment with both glucocorticoid and forskolin for 24 hr or 8 days markedly increased preproenkephalin mRNA to 5-8 and 30 times the control, respectively. Intracellular Met-enkephalin immunoreactivity was increased in parallel with the mRNA abundance. The results demonstrate that preproenkephalin gene expression is synergistically regulated by glucocorticoids and cAMP.

摘要

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