Regulation of the rat S100β gene expression: The role of the 2 kb 5'- upstream sequence in glial specific expression

Nobuko Hagiwara, N. Sueoka

Research output: Contribution to journalArticle

10 Scopus citations

Abstract

We have studied the role of the 2047 bp 5'-upstream region and 232 bp first exon sequence of the rat S100β gene in glial specific expression. S100β luciferase expression vectors carrying serial deletions of the S100β 5' upstream sequence were constructed and transiently transfected into the peripheral nervous system (PNS) glial-type cell line RT4-D6, the PNS neuronal-type cell line RT4-E5, and the central nervous system (CNS) glial- type cell line C6. The hepatoma cell line HTC was also transfected as a non- neural control. From this functional analysis, we found a glial-specific positive regulatory sequence(s) mapped between -583 and -106 relative to the transcriptional start site. This region confers a significantly higher level of luciferase expression in the glial-type cell lines RT4-D6 and C6 than in the neuronal cell line RT4-E5 and the hepatoma cell line HTC. Also, a non- cell type specific positive regulatory element was identified in the first exon sequence between + 78 and + 232. Though non-cell type-specific, it was found to have a predominant effect in glial cells. From these observations, we have concluded that the 2047 bp 5'-upstream region and 232 bp of the first exon sequence confers the high levels of S100β expression in glial cells through these two positive elements.

Original languageEnglish (US)
Pages (from-to)603-612
Number of pages10
JournalJournal of Neuroscience Research
Volume42
Issue number5
DOIs
StatePublished - 1995
Externally publishedYes

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Keywords

  • downstream positive element
  • glial specific gene expression
  • luciferase expression vector
  • rat S100β gene
  • RT4 cell lines

ASJC Scopus subject areas

  • Neuroscience(all)

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