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Restraint of inflammatory signaling by interdependent strata of negative regulatory pathways
Peter J Murray1, Stephen T Smale
1Department of Infectious Diseases and Department of Immunology, St. Jude Children's Research Hospital, Memphis, Tennessee, USA. peter.murray@stjude.org
Abstract:
Activation of Toll-like receptor (TLR) signaling and related pathways by microbial products drives inflammatory responses, host-defense pathways and adaptive immunity. The cost of excessive inflammation is cell and tissue damage, an underlying cause of many acute and chronic diseases. Coincident with activation of TLR signaling, a plethora of anti-inflammatory pathways and mechanisms begin to modulate inflammation until tissue repair is complete. Whereas most studies have focused on the signaling components immediately downstream of the TLRs, this Review summarizes the different levels of anti-inflammatory pathways that have evolved to abate TLR signaling and how they are integrated to prevent cell and tissue destruction.
Insights
Toll-like receptor (TLR) activation triggers inflammation, but the body has evolved anti-inflammatory pathways to control it. This review details how these pathways modulate TLR signaling to prevent tissue damage.
Area of Science:
- Immunology
- Molecular Biology
- Cell Biology
Background:
- Toll-like receptor (TLR) signaling, initiated by microbial products, is crucial for inflammatory and immune responses.
- Excessive inflammation resulting from TLR activation can lead to cell and tissue damage, contributing to various diseases.
Purpose of the Study:
- To review the diverse anti-inflammatory pathways that modulate TLR signaling.
- To understand the integration of these pathways in preventing TLR-induced tissue destruction.
Main Methods:
- Literature review of studies on TLR signaling and anti-inflammatory mechanisms.
- Analysis of the integration and regulation of anti-inflammatory pathways downstream of TLRs.
Main Results:
- Multiple levels of anti-inflammatory pathways exist to counteract TLR signaling.
- These pathways are integrated to effectively dampen inflammation and protect tissues.
Conclusions:
- Understanding these integrated anti-inflammatory mechanisms is key to preventing TLR-mediated pathology.
- This review provides a comprehensive overview of the regulatory network controlling TLR-induced inflammation.
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