Toll-like receptor signaling pathways--therapeutic opportunities
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Updated: Jun 7, 2026

Screening Bioactive Nanoparticles in Phagocytic Immune Cells for Inhibitors of Toll-like Receptor Signaling
Published on: July 26, 2017
1The Department of Internal Medicine (Rheumatology), University of Texas Southwestern Medical School, Dallas, TX 75390, USA.
Abstract:
Toll-like receptors (TLRs) are transmembrane proteins acting mainly as sensors of microbial components. Triggering TLRs results in increased expression of multiple inflammatory genes, which then play a protective role against infection. However, aberrant activation of TLR signaling has a significant impact on the onset of cancer, allergy, sepsis and autoimmunity. Various adaptor proteins, including MyD88, IRAKs, TIRAP, TRIF, and TRAM, are involved in specific TLR signaling pathways. This article reviews the role of these molecules in TLR signaling, and discusses the impact of this pathway on various disease scenarios. Given their important role in infectious and non-infectious disease settings, TLRs and their signaling pathways emerge as attractive targets for therapeutics.
Insights
Toll-like receptors (TLRs) sense microbes, triggering inflammation for protection. Aberrant TLR signaling contributes to diseases like cancer and autoimmunity, making TLRs therapeutic targets.
Area of Science:
- Immunology
- Molecular Biology
Background:
- Toll-like receptors (TLRs) are key transmembrane sensors of microbial components.
- TLR activation initiates inflammatory gene expression, crucial for host defense against infection.
Purpose of the Study:
- To review the role of adaptor proteins in Toll-like receptor signaling pathways.
- To discuss the impact of TLR signaling on various disease states.
- To highlight TLRs as potential therapeutic targets.
Main Methods:
- Literature review of TLR signaling pathways.
- Analysis of adaptor proteins (MyD88, IRAKs, TIRAP, TRIF, TRAM) in TLR signaling.
- Discussion of TLRs' role in infectious and non-infectious diseases.
Main Results:
- TLR signaling involves multiple adaptor proteins, each mediating specific pathways.
- Dysregulated TLR activation is implicated in cancer, allergy, sepsis, and autoimmunity.
- TLR signaling pathways are critical in both infectious and non-infectious disease contexts.
Conclusions:
- Adaptor proteins are essential components of TLR signaling cascades.
- Aberrant TLR activation significantly contributes to the pathogenesis of major diseases.
- Targeting TLRs and their signaling pathways offers promising therapeutic strategies.
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