title: Ethanol exposure potentiates fosB and junB expression induced by muscarinic receptor stimulation in neuroblastoma SH-SY5Y cells.
abstract: Muscarinic receptor stimulation and activation of protein kinase C cause an increase in fosB and junB transcripts in human neuroblastoma SH-SY5Y cells. In this study, the effect of long-term ethanol exposure on these events was investigated. Carbachol-stimulated fosB and junB expression was elevated in ethanol-exposed cells compared with control cells. The potentiation was time- and dose-dependent on ethanol. Preincubation with muscarinic antagonists or protein kinase C inhibitor demonstrated that the carbachol-stimulated increase in fosB and junB mRNA levels was primarily mediated via M1 receptors and dependent on the activity of protein kinase C in both control and ethanol-exposed cells. Long-term ethanol exposure did not influence the expression of fosB and junB induced by activation of protein kinase C with phorbol ester. These results demonstrate that the muscarinic receptor-stimulated fosB and junB expression is sensitive to ethanol exposure in SH-SY5Y cells, suggesting that these genes participate in the regulation of neuronal function in response to chronic ethanol treatment.
authors.affiliation: Department of Medical Neurochemistry, Institute of Laboratory Medicine, Lund University Hospital, Sweden.
authors.forename: W Q
authors.initials: WQ
authors.lastname: Ding
authors.forename: U
authors.initials: U
authors.lastname: Fried
authors.forename: C
authors.initials: C
authors.lastname: Larsson
authors.forename: C
authors.initials: C
authors.lastname: Alling
mesh_terms: D002217:Carbachol / Q000494:pharmacology; D004305:Dose-Response Relationship, Drug; D004791:Enzyme Inhibitors / Q000494:pharmacology; D000431:Ethanol / Q000633:toxicity*; D015870:Gene Expression / Q000187:drug effects; D006801:Humans; D007211:Indoles / Q000494:pharmacology; D008301:Maleimides / Q000494:pharmacology; D009447:Neuroblastoma; D011493:Protein Kinase C / Q000037:antagonists & inhibitors* / Q000502:physiology; D016760:Proto-Oncogene Proteins c-fos / Q000235:genetics*; D016755:Proto-Oncogene Proteins c-jun / Q000235:genetics*; D012333:RNA, Messenger / Q000235:genetics; D011976:Receptors, Muscarinic / Q000187:drug effects*; D014158:Transcription, Genetic / Q000187:drug effects*; D014407:Tumor Cells, Cultured / Q000187:drug effects*
chemical_list: D004791:Enzyme Inhibitors; D007211:Indoles; D008301:Maleimides; D016760:Proto-Oncogene Proteins c-fos; D016755:Proto-Oncogene Proteins c-jun; D012333:RNA, Messenger; D011976:Receptors, Muscarinic; D000431:Ethanol; D002217:Carbachol; D011493:Protein Kinase C; C070515:bisindolylmaleimide I