Abstract:
:Neurotransmitters play important roles in neurogenesis; in particular, acetylcholine and serotonin may regulate neurite elongation. Acetylcholine may also activate transcription factors such as early growth response protein 1 (EGR-1), which plays a role in neurite extension. N18TG2 neuroblastoma cells (which do not produce neurotransmitters and constitutively express muscarinic acetylcholine receptors) were transfected with constructs containing the cDNA for choline acetyltransferase, 5-hydroxytryptamine 1A (5-HT1A) and 5-HT2B serotonin receptors to study acetylcholine and serotonin interplay in neurite outgrowth. 5-HT1A receptor stimulation causes a decrease in EGR-1 levels and inhibition of neurite outgrowth; 5-HT2B stimulation, however, has no effect. Muscarinic cholinergic stimulation, on the other end, increases EGR-1 levels and fiber outgrowth. Inhibition of EGR-1 binding reduces fiber outgrowth activity. When both cholinergic and 5-HT1A receptors are stimulated, fiber outgrowth is restored; therefore, acetylcholine counterbalances the inhibitory effect of serotonin on neurite outgrowth. These results suggest that EGR-1 plays a role in the interplay of acetylcholine and serotonin in the regulation of neurite extension during development.
journal_name
Dev Neuroscijournal_title
Developmental neuroscienceauthors
Anelli T,Cardarelli S,Ori M,Nardi I,Biagioni S,Poiana Gdoi
10.1159/000354423subject
Has Abstractpub_date
2013-01-01 00:00:00pages
450-60issue
6eissn
0378-5866issn
1421-9859pii
000354423journal_volume
35pub_type
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journal_title:Developmental neuroscience
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更新日期:1997-01-01 00:00:00
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doi:10.1159/000017298
更新日期:1998-01-01 00:00:00
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更新日期:2009-01-01 00:00:00
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