Title : Prolonged activation of cAMP-response element-binding protein and ATF-2 needed for nicotine-triggered elevation of tyrosine hydroxylase gene transcription in PC12 cells.

Pub. Date : 2006 Apr 14

PMID : 16452470






7 Functional Relationships(s)
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1 Prolonged activation of cAMP-response element-binding protein and ATF-2 needed for nicotine-triggered elevation of tyrosine hydroxylase gene transcription in PC12 cells. Nicotine cAMP responsive element binding protein 1 Rattus norvegicus
2 Phosphorylation (P-) of cAMP-response element-binding protein (CREB) by protein kinase A or mitogen-activated protein kinases was implicated in mediating the increased tyrosine hydroxylase (TH) gene expression after prolonged exposure to nicotine in vivo and in cell culture. Nicotine cAMP responsive element binding protein 1 Rattus norvegicus
3 Phosphorylation (P-) of cAMP-response element-binding protein (CREB) by protein kinase A or mitogen-activated protein kinases was implicated in mediating the increased tyrosine hydroxylase (TH) gene expression after prolonged exposure to nicotine in vivo and in cell culture. Nicotine cAMP responsive element binding protein 1 Rattus norvegicus
4 Treatment of PC12 cells with 200 microm nicotine triggered rapid but transient elevation of P-CREB followed by a second sustained rise after 2-5 h of continuous nicotine. Nicotine cAMP responsive element binding protein 1 Rattus norvegicus
5 In contrast, protein kinase A inhibitor H-89 or Ca(2+)/calmodulin-activated protein kinase inhibitor KN-93 reduced the nicotine-triggered rise in P-CREB and TH promoter activity. Nicotine cAMP responsive element binding protein 1 Rattus norvegicus
6 Knockdown of ATF-2 or CREB with siRNA did not alter basal TH promoter activity or mRNA but greatly attenuated the response to nicotine. Nicotine cAMP responsive element binding protein 1 Rattus norvegicus
7 The results suggest that both ATF-2 and CREB mediate activation of TH gene transcription by nicotine. Nicotine cAMP responsive element binding protein 1 Rattus norvegicus