Terminal Differentiation-Dependent Alteration in the Expression of Translation Elongation Factor-1α and Its Sister Gene, S1, in Neurons

Stephen Lee, Andréa LeBlanc, Atanu Duttaroy, Eugenia Wang

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Elongation factor-1α (EF-1α) is a highly conserved, abundantly expressed protein that functions in peptide elongation during mRNA translation. Mammalian species contain a second EF-1α gene, S1, whose expression is limited to brain, heart, and skeletal muscle. Such tissue specificity in S1 gene expression led us to hypothesize that this specialized member of the EF-1α family is possibly essential to terminally differentiated, long-lived cells such as neurons, cardiomyocytes, and myocytes. We report here that during development, EF-1α mRNA levels remain unchanged in S1-negative tissues, but sharply decrease in S1-positive tissues. RNase protection as well as tissue distribution analyses of the S1 message suggest that down-regulation of EF-1α expression coincides well with that of S1 up-regulation during postnatal development. Analysis of primary cultures of the rat neonatal cerebral cortex cells has shown that S1 gene expression is indeed restricted to neurons only, whereas nonneuronal cell types such as astrocytes and microglia are S1-negative. EF-1α mRNA on the other hand was detected in all three cell types, namely, neurons, astrocytes, and microglia. This report confirms the terminal differentiation-dependent expression of the S1 gene in neurons of the cerebral cortex.

Original languageEnglish (US)
Pages (from-to)589-597
Number of pages9
JournalExperimental Cell Research
Volume219
Issue number2
DOIs
StatePublished - Aug 1995
Externally publishedYes

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Peptide Elongation Factor 1
Neurons
Genes
Microglia
Gene Expression
Astrocytes
Cerebral Cortex
Messenger RNA
Organ Specificity
Protein Biosynthesis
Tissue Distribution
Ribonucleases
Cardiac Myocytes
Muscle Cells
Myocardium
Skeletal Muscle
Up-Regulation
Down-Regulation
Peptides
Brain

ASJC Scopus subject areas

  • Cell Biology

Cite this

Terminal Differentiation-Dependent Alteration in the Expression of Translation Elongation Factor-1α and Its Sister Gene, S1, in Neurons. / Lee, Stephen; LeBlanc, Andréa; Duttaroy, Atanu; Wang, Eugenia.

In: Experimental Cell Research, Vol. 219, No. 2, 08.1995, p. 589-597.

Research output: Contribution to journalArticle

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