Abstract:
:The electrophysiological properties of neurons are determined by the expression of defined complements of ion channels. Nonetheless, the regulation mechanisms of the expression of neuronal ion channels are poorly understood, due in part to the diversity of neuron subtypes. We explored the expression of voltage-gated currents of Xenopus primary spinal neurons unequivocally identified by means of single-cell RT-PCR. We found that identified spinal neurons exhibit heterogeneity in the temporal appearance of voltage-gated currents. Nevertheless, all neurons progress to similar functional phenotypes. A physiological feature is the onset and increase of the expression of sodium currents. To understand the mechanisms underlying this process, we studied the effect of a dominant negative form of the transcriptional silencer REST/NRSF and found that it associates to an increase in the density of sodium currents. This observation is compatible with a role of this factor in the regulation of gene expression in neurons. These experiments constitute a proof of principle for the feasibility of analyzing molecular mechanisms of the regulation of ion channel genes during early neuronal development and provide direct evidence of the role of REST/NRSF in the control of neuronal sodium channel expression.
journal_name
Biol Resjournal_title
Biological researchauthors
Olguín P,Armisen R,Kukuljan Mdoi
10.4067/s0716-97602006000300010subject
Has Abstractpub_date
2006-01-01 00:00:00pages
483-91issue
3eissn
0716-9760issn
0717-6287pii
S0716-97602006000300010journal_volume
39pub_type
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pub_type: 杂志文章,评审
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journal_title:Biological research
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journal_title:Biological research
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journal_title:Biological research
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doi:/S0716-97602011000200009
更新日期:2011-01-01 00:00:00
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pub_type: 杂志文章
doi:/S0716-97602009000100013
更新日期:2009-01-01 00:00:00
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更新日期:1999-01-01 00:00:00
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doi:/S0716-97602008000300004
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更新日期:2015-07-26 00:00:00
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