Journal ArticleDOI
CD14, a receptor for complexes of lipopolysaccharide (LPS) and LPS binding protein.
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TLDR
CD14, a differentiation antigen of monocytes, was found to bind complexes of LPS and LBP, and blockade of CD14 with monoclonal antibodies prevented synthesis of TNF-alpha by whole blood incubated with LPS.Abstract:
Leukocytes respond to lipopolysaccharide (LPS) at nanogram per milliliter concentrations with secretion of cytokines such as tumor necrosis factor-alpha (TNF-alpha). Excess secretion of TNF-alpha causes endotoxic shock, an often fatal complication of infection. LPS in the bloodstream rapidly binds to the serum protein, lipopolysaccharide binding protein (LBP), and cellular responses to physiological levels of LPS are dependent on LBP. CD14, a differentiation antigen of monocytes, was found to bind complexes of LPS and LBP, and blockade of CD14 with monoclonal antibodies prevented synthesis of TNF-alpha by whole blood incubated with LPS. Thus, LPS may induce responses by interacting with a soluble binding protein in serum that then binds the cell surface protein CD14.read more
Citations
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Metabolic endotoxemia initiates obesity and insulin resistance
Patrice D. Cani,Jacques Amar,Miguel A. Iglesias,Marjorie Poggi,Claude Knauf,Delphine Bastelica,Audrey M. Neyrinck,Francesca Fava,Kieran Tuohy,Chantal Chabo,Aurélie Waget,Evelyne Delmée,Béatrice Cousin,Thierry Sulpice,Bernard Chamontin,Jean Ferrières,Jean-François Tanti,Glenn R. Gibson,Louis Casteilla,Nathalie M. Delzenne,Marie-Christine Alessi,Rémy Burcelin +21 more
TL;DR: It is concluded that the LPS/CD14 system sets the tone of insulin sensitivity and the onset of diabetes and obesity and lowering plasma LPS concentration could be a potent strategy for the control of metabolic diseases.
Journal ArticleDOI
Toll-like receptors and innate immunity
TL;DR: This work has shown that activation of inflammatory and antimicrobial innate immune responses through recognition of Toll-like receptors expressed on dendritic cells triggers functional maturation of dendrites and leads to initiation of antigen-specific adaptive immune responses.
Journal ArticleDOI
Differential roles of TLR2 and TLR4 in recognition of gram-negative and gram-positive bacterial cell wall components.
Osamu Takeuchi,Katsuaki Hoshino,Taro Kawai,Hideki Sanjo,Haruhiko Takada,Tomohiko Ogawa,Kiyoshi Takeda,Shizuo Akira +7 more
TL;DR: It is demonstrated that TLR2 and TLR4 recognize different bacterial cell wall components in vivo andTLR2 plays a major role in Gram-positive bacterial recognition.
Journal ArticleDOI
Toll-like receptors in the induction of the innate immune response
Alan Aderem,Richard J. Ulevitch +1 more
TL;DR: A group of proteins that comprise the Toll or Toll-like family of receptors perform this role in vertebrate and invertebrate organisms and it is therefore not surprising that studies of the mechanism by which they act has revealed new and important insights into host defence.
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The immunopathogenesis of sepsis.
TL;DR: Because of the high mortality of sepsis in the face of standard treatment, many efforts have been made to improve understanding of the dysregulation of the host response in sepsi, and much has been learnt of the basic principles governing bacterial–host interactions.
References
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TL;DR: The identification of this pathway for LPS-induced monocyte stimulation may aid in the development of treatments for diseases in which Gram-negative sepsis or endotoxemia are involved.
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Journal ArticleDOI
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Keith C Mcfarland,Rolf Sprengel,Heidi S. Phillips,Martin Köhler,Nora Rosemblit,Karoly Nikolics,Deborah L. Segaloff,Peter H. Seeburg +7 more
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