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Published on: July 26, 2017
Innate recognition of microbial-derived signals in immunity and inflammation
1Department of General Surgery, East Hospital, Tongji University School of Medicine, Shanghai, 200120, China.
Abstract:
Microbes generate a vast array of different types of conserved structural components called pathogen-associated molecular patterns (PAMPs), which can be recognized by cells of the innate immune system. This recognition of "nonself" signatures occurs through host pattern recognition receptors (PRRs), suggesting that microbial-derived signals are good targets for innate immunity to discriminate between self- and nonself. Such PAMP-PRR interactions trigger multiple but distinct downstream signaling cascades, subsequently leading to production of proinflammatory cytokines and interferons that tailor immune responses to particular microbes. Aberrant PRR signals have been associated with various inflammatory diseases and fine regulation of PRR signaling is essential for avoiding excessive inflammatory immune responses and maintaining immune homeostasis. In this review we summarize the ligands and signal transduction pathways of PRRs and highlight recent progress of the mechanisms involved in microbe-specific innate immune recognition during immune responses and inflammation, which may provide new targets for therapeutic intervention to the inflammatory disorders.
Insights
Pathogen-associated molecular patterns (PAMPs) are microbial signals recognized by pattern recognition receptors (PRRs) in innate immunity. Understanding PAMP-PRR interactions is key for controlling inflammation and developing therapies for inflammatory disorders.
Area of Science:
- Immunology
- Microbiology
- Molecular Biology
Background:
- Microbes possess conserved structural components known as pathogen-associated molecular patterns (PAMPs).
- The innate immune system utilizes pattern recognition receptors (PRRs) to detect these PAMPs, distinguishing 'self' from 'nonself'.
- PAMP-PRR interactions initiate signaling cascades, producing cytokines and interferons crucial for tailored immune responses.
Purpose of the Study:
- To review the ligands and signal transduction pathways of PRRs.
- To highlight recent advances in microbe-specific innate immune recognition mechanisms.
- To identify potential therapeutic targets for inflammatory disorders.
Main Methods:
- Literature review of PAMP-PRR interactions.
- Analysis of downstream signaling pathways.
- Summary of recent research on immune recognition and inflammation.
Main Results:
- PAMPs serve as critical signals for innate immune detection of microbes.
- PRR signaling regulates the production of key immune mediators like cytokines and interferons.
- Dysregulated PRR signaling is linked to inflammatory diseases.
Conclusions:
- Fine-tuning PRR signaling is essential for immune homeostasis and preventing excessive inflammation.
- Understanding PAMP-PRR mechanisms offers new therapeutic avenues for inflammatory conditions.
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