Novel splice variants of the voltage-sensitive sodium channel alpha subunit.

Abstract:

:In this study, we have identified novel splice variants of the Na+ channel alpha subunit mRNA from cultured rat astrocytes and neuroblastoma cells. These splice variants are characterized by premature truncation or deletion of a segment in the third domain of the Na+ channel alpha subunit. The expression of three splice variants was upregulated by exposure to 1 mM dibutyryl cAMP in spinal cord astrocytes but not in cerebral astrocytes and in B50 and B104 neuroblastoma cells. The calcium ionophore 1 microM A23187, did not influence the expression of splice variants in either astrocytes or neuroblastoma cells. These findings suggest that spinal cord astrocytes may maintain a unique regulatory pathway that participates in the control of Na+ channel mRNA expression.

journal_name

Neuroreport

journal_title

Neuroreport

authors

Oh Y,Waxman SG

doi

10.1097/00001756-199805110-00002

subject

Has Abstract

pub_date

1998-05-11 00:00:00

pages

1267-72

issue

7

eissn

0959-4965

issn

1473-558X

journal_volume

9

pub_type

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