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PMID: 10549626 Published · ppublish English Comparative Study Journal Article Research Support, Non-U.S. Gov't

Differential roles of TLR2 and TLR4 in recognition of gram-negative and gram-positive bacterial cell wall components.

Immunity ·Vol. 11 ·No. 4 ·1999-10-00 ·Pages 443-51

Takeuchi O, Hoshino K, Kawai T, Sanjo H, Takada H, Ogawa T, Takeda K, Akira S

Abstract

Toll-like receptor (TLR) 2 and TLR4 are implicated in the recognition of various bacterial cell wall components, such as lipopolysaccharide (LPS). To investigate in vivo roles of TLR2, we generated TLR2-deficient mice. In contrast to LPS unresponsiveness in TLR4-deficient mice, TLR2-deficient mice responded to LPS to the same extent as wild-type mice. TLR2-deficient macrophages were hyporesponsive to several Gram-positive bacterial cell walls as well as Staphylococcus aureus peptidoglycan. TLR4-deficient macrophages lacked the response to Gram-positive lipoteichoic acids. These results demonstrate that TLR2 and TLR4 recognize different bacterial cell wall components in vivo and TLR2 plays a major role in Gram-positive bacterial recognition.

MeSH Terms
Animals Antigens, Bacterial/immunology Cell Wall/immunology Corynebacterium diphtheriae/chemistry,immunology Drosophila Proteins Escherichia coli/chemistry,immunology Female Gram-Negative Bacteria/chemistry,immunology Gram-Positive Bacteria/chemistry,immunology Interleukin-1 Receptor-Associated Kinases Lipid A/immunology Lipopolysaccharides/immunology Macrophages, Peritoneal/immunology Male Membrane Glycoproteins/deficiency,genetics,physiology Mice Mice, Inbred C57BL Mice, Knockout NF-kappa B/metabolism Nocardia/chemistry,immunology Peptidoglycan/immunology Protein Isoforms/deficiency,genetics,physiology Protein Kinases/metabolism Receptors, Cell Surface/deficiency,genetics,physiology Salmonella/chemistry,immunology Signal Transduction Species Specificity Staphylococcus aureus/chemistry,immunology Teichoic Acids/immunology Toll-Like Receptor 2 Toll-Like Receptor 4 Toll-Like Receptors
Chemicals
Antigens, Bacterial Drosophila Proteins Lipid A Lipopolysaccharides Membrane Glycoproteins NF-kappa B Peptidoglycan Protein Isoforms Receptors, Cell Surface Teichoic Acids Toll-Like Receptor 2 Toll-Like Receptor 4 Toll-Like Receptors lipoteichoic acid Protein Kinases Interleukin-1 Receptor-Associated Kinases
Authors & Affiliations
8 authors, click to expand affiliations / ORCID
Takeuchi O
Department of Host Defense, Research Institute for Microbial Diseases, Osaka University, Japan.
Hoshino K
Kawai T
Sanjo H
Takada H
Ogawa T
Takeda K
Akira S
Article Info
Journal
Immunity
Abbr.
Immunity
ISSN
1074-7613
Published
1999-10-00
Pages
443-51
Language
English
Region
United States
NLM ID
9432918
Subset
IM
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