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- W1522995890 abstract "We exploited the simple organization of bullfrog paravertebral sympathetic ganglia (BFSG) to test whether the neurotransmitter peptide luteinizing hormone releasing hormone (LHRH), which generates the late slow EPSP, could also exert long-term neurotrophic control of ion channel expression. Whole-cell recordings from B-cells in BFSG showed that removal of all of the sources of ganglionic LHRH for 10 d by cutting preganglionic C-fibers <i>in vivo</i> caused a 28% reduction in Ca<sup>2+</sup> current density. When BFSG B-neurons were dissociated from adult bullfrogs and maintained in a defined-medium, neuron-enriched, low-density, serum-free culture, the <i>I</i><sub>Ca</sub> density was increased by 49% after 6-7 d in the presence of 0.45 μm LHRH. This increase was not associated with alterations in the voltage dependence of Ca<sup>2+</sup> current activation or inactivation and reflected a selective increase in N-type Ca<sup>2+</sup> channel current. The increase in <i>I</i><sub>Ca</sub> density induced by LHRH was blocked by the transcription inhibitor actinomycin D. These results suggest that chronic exposure to a neurotransmitter that acts through G-protein-coupled receptors exerts long-term control of ion channel expression in a fully differentiated, adult sympathetic neuron <i>in vitro</i> or <i>in vivo</i>." @default.
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- W1522995890 date "2003-08-06" @default.
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- W1522995890 title "Neurotrophic Regulation of Calcium Channels by the Peptide Neurotransmitter Luteinizing Hormone Releasing Hormone" @default.
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- W1522995890 doi "https://doi.org/10.1523/jneurosci.23-18-07169.2003" @default.
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