Title : Differing temporal roles of Ca2+ and cAMP in nicotine-elicited elevation of tyrosine hydroxylase mRNA.

Pub. Date : 1999 Jan

PMID : 9886920






6 Functional Relationships(s)
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1 Differing temporal roles of Ca2+ and cAMP in nicotine-elicited elevation of tyrosine hydroxylase mRNA. Nicotine tyrosine hydroxylase Rattus norvegicus
2 The involvement of cAMP- and Ca2+-mediated pathways in the activation of tyrosine hydroxylase (TH) gene expression by nicotine was examined in PC-12 cells. Nicotine tyrosine hydroxylase Rattus norvegicus
3 The involvement of cAMP- and Ca2+-mediated pathways in the activation of tyrosine hydroxylase (TH) gene expression by nicotine was examined in PC-12 cells. Nicotine tyrosine hydroxylase Rattus norvegicus
4 Extracellular Ca2+ and elevations in intracellular Ca2+ concentration ([Ca2+]i) were required for nicotine to increase TH mRNA. Nicotine tyrosine hydroxylase Rattus norvegicus
5 DDA also blocked the elevation of TH mRNA only when added after the initial transient rise in [Ca2+]i and not after 1 h. This study reveals that several temporal phases are involved in the induction of TH gene expression by nicotine, each of them with differing requirements for Ca2+ and cAMP. Nicotine tyrosine hydroxylase Rattus norvegicus
6 DDA also blocked the elevation of TH mRNA only when added after the initial transient rise in [Ca2+]i and not after 1 h. This study reveals that several temporal phases are involved in the induction of TH gene expression by nicotine, each of them with differing requirements for Ca2+ and cAMP. Nicotine tyrosine hydroxylase Rattus norvegicus