The early competence genes JE and KC are differentially regulated in murine peritoneal macrophages in response to lipopolysaccharide - PubMed (original) (raw)
The early competence genes JE and KC are differentially regulated in murine peritoneal macrophages in response to lipopolysaccharide
T J Koerner et al. Biochem Biophys Res Commun. 1987.
Abstract
Treatment of murine peritoneal macrophages with bacterial lipopolysaccharide (LPS) has been previously documented to induce accumulation of mRNA for the early or competence genes JE and KC; the data further suggested that multiple pathways existed for the transduction of the LPS signal, since induction of mRNA for JE was related to breakdown of polyphosphoinositides while induction of KC was not (Introna et al. 1987 J. Immunol. 138, 3891). This study provides analysis of the regulation of the expression of these genes by using the nuclear transcription assay. We present evidence that LPS enhanced transcriptional activity of the KC gene, but not of the JE gene. By contrast, serum stimulation of quiescent BALB/c-3T3 fibroblasts induced transcription of the JE and KC genes. The data imply that expression of the KC gene in LPS-treated macrophages is regulated transcriptionally, while that of the JE gene is regulated post-transcriptionally. Furthermore, there appear to be two mechanistic pathways for the induction of JE mRNA depending upon the stimulus and upon the cell type: one involving transcriptional and one post-transcriptional control.
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