Formyl-Peptide Receptors in Infection, Inflammation, and Cancer
Elisabeth Weiß1, Dorothee Kretschmer1
1Infection Biology, Interfaculty Institute for Microbiology and Infection Medicine Tübingen (IMIT), University of Tübingen, Auf der Morgenstelle 28, 72076 Tübingen, Germany.
Abstract:
Formyl-peptide receptors (FPRs) recognize bacterial and mitochondrial formylated peptides as well as endogenous non-formylated peptides and even lipids. FPRs are expressed on various host cell types but most strongly on neutrophils and macrophages. After the discovery of FPRs on leukocytes, it was assumed that these receptors predominantly govern a proinflammatory response resulting in chemotaxis, degranulation, and oxidative burst during infection. However, it is clear that the activation of FPRs has more complex consequences and can also promote the resolution of inflammation. Recent studies have highlighted associations between FPR function and inflammatory conditions, including inflammatory disorders, cancer, and infection. In this review we discuss these recent findings.
Insights
Formyl-peptide receptors (FPRs) recognize various peptides and lipids, influencing both inflammation and its resolution. Recent research reveals their complex roles in inflammatory disorders, cancer, and infection.
Area of Science:
- Immunology
- Molecular Biology
- Biochemistry
Background:
- Formyl-peptide receptors (FPRs) are key immune sensors recognizing pathogen-derived and endogenous ligands.
- Initially, FPRs were primarily linked to pro-inflammatory responses in leukocytes like neutrophils and macrophages.
- Emerging evidence suggests FPRs also play a critical role in resolving inflammation.
Purpose of the Study:
- To review recent findings on the multifaceted roles of FPRs.
- To explore the association of FPR function with inflammatory conditions, cancer, and infection.
Main Methods:
- Literature review of recent studies on FPRs.
- Analysis of research linking FPRs to various disease states.
Main Results:
- FPRs recognize a diverse range of molecules, including bacterial/mitochondrial peptides and endogenous lipids.
- FPR activation extends beyond pro-inflammatory signals to include anti-inflammatory and resolution pathways.
- FPRs are implicated in the pathogenesis and progression of inflammatory disorders, cancer, and infectious diseases.
Conclusions:
- FPRs possess complex functions extending beyond initial assumptions of solely pro-inflammatory roles.
- Understanding FPRs' dual role in inflammation and resolution is crucial for therapeutic strategies.
- Further research into FPRs is warranted for conditions including cancer and infection.
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