Bacterial LPS up-regulated TLR3 expression is critical for antiviral response in human monocytes: Evidence for negative regulation by CYLD

Zhixing K. Pan, Chris Fisher, Jian Dong Li, Yong Jiang, Shuang Huang, Ling Yu Chen

Research output: Contribution to journalArticle

16 Scopus citations

Abstract

In the host immune system, the leukocytes are often exposed to multiple pathogens including bacteria and viruses. The principal challenge for the host is to efficiently detect the invading pathogen and mount a rapid defensive response. Leukocytes recognize invading pathogens by directly interacting with pathogen-associated molecular patterns via Toll-like receptors (TLRs) expressed on the leukocyte surfaces. In this study, we provide direct evidence that bacterial LPS enhances the host antiviral response by up-regulating TLR3 expression in human peripheral blood monocytes and monocytic cell lines, THP1 cells. Moreover, LPS induces TLR3 expression via a TLR4-MyD88-IRAK-TRAF6-NF-κB-dependent signaling pathway. Interestingly, CYLD, an important deubiquitinase, acts as a negative regulator of TLR3 induction by LPS. Our study thus provides new insights into a novel role for bacterial infection in enhancing host antiviral response; furthermore, it identifies CYLD for the first time as a critical negative regulator of bacterial LPS-induced response.

Original languageEnglish (US)
Article numberdxr019
Pages (from-to)357-364
Number of pages8
JournalInternational Immunology
Volume23
Issue number6
DOIs
StatePublished - Jun 6 2011

Keywords

  • Gene expression
  • Inflammation
  • Signal transduction
  • Toll-like receptor

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology

Fingerprint Dive into the research topics of 'Bacterial LPS up-regulated TLR3 expression is critical for antiviral response in human monocytes: Evidence for negative regulation by CYLD'. Together they form a unique fingerprint.

  • Cite this