Bacterial peptidoglycan induces CD14-dependent activation of transcription factors CREB/ATF and AP-1

Dipika Gupta, Qiuling Wang, Charles Vinson, Roman Dziarski

Research output: Contribution to journalArticle

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Abstract

Peptidoglycan (PGN), the major cell wall component of Gram-positive bacteria, induces secretion of cytokines in macrophages through CD14, the pattern recognition receptor that binds lipopolysaccharide and other microbial products. To begin to elucidate the mechanisms that regulate the transcription of cytokine genes, we wanted to determine which transcription factors are activated by PGN in mouse RAW264.7 and human THP-1 macrophage cells. Our results demonstrated that: (i) PGN induced phosphorylation of the transcription factors ATF-1 and CREB; (ii) ATF-1 and CREB bound DNA as a dimer and induced transcriptional activation of a CRE reporter plasmid, which was inhibited by dominant negative CREB and ATF-1; (iii) PGN induced phosphorylation of c-Jun, protein synthesis of JunB and c-Fos, and transcriptional activation of the AP-1 reporter plasmid, which was inhibited by dominant negative c-Fos; and (iv) PGN-induced activation of CREB/ATF and AP-1 was mediated through CD14. This is the first study to demonstrate activation of CREB/ATF and AP-1 transcription factors by PGN or by any other component of Gram-positive bacteria.

Original languageEnglish
Pages (from-to)14012-14020
Number of pages9
JournalJournal of Biological Chemistry
Volume274
Issue number20
DOIs
StatePublished - May 14 1999

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Activating Transcription Factors
Peptidoglycan
Transcription Factor AP-1
Transcription Factors
Chemical activation
Phosphorylation
Macrophages
Gram-Positive Bacteria
Transcriptional Activation
Bacteria
Plasmids
Proto-Oncogene Proteins c-jun
Cytokines
Pattern Recognition Receptors
Cellular Structures
Transcription
Dimers
Cell Wall
Lipopolysaccharides
Genes

ASJC Scopus subject areas

  • Biochemistry

Cite this

Bacterial peptidoglycan induces CD14-dependent activation of transcription factors CREB/ATF and AP-1. / Gupta, Dipika; Wang, Qiuling; Vinson, Charles; Dziarski, Roman.

In: Journal of Biological Chemistry, Vol. 274, No. 20, 14.05.1999, p. 14012-14020.

Research output: Contribution to journalArticle

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