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RAGE on the Toll Road?

Li Lin1

  • 1Laboratory of Cardiovascular Sciences, National Institute on Aging, 5600 Nathan Shock Drive, Baltimore, Maryland 21224, USA. linli@mail.nih.gov

Cellular & Molecular Immunology
|November 10, 2006
PubMed

Insights

Receptor for Advanced Glycation End products (RAGE) may act as a pattern-recognizing receptor (PRR), similar to Toll-like receptors (TLRs), to trigger inflammation. This highlights RAGE

Area of Science:

  • Immunology
  • Cellular Biology
  • Molecular Medicine

Background:

  • Mammalian Toll-like receptors (TLRs) are pattern-recognizing receptors (PRRs) crucial for innate immunity, recognizing pathogen-associated molecular patterns.
  • TLR activation triggers signaling cascades, activating NF-kappaB and leading to proinflammatory cytokine production, essential for host defense and adaptive immunity.
  • Emerging evidence indicates PRRs, including TLRs, can recognize host-derived ligands, implicating them in non-infectious diseases.

Purpose of the Study:

  • To review the potential role of the Receptor for Advanced Glycation End products (RAGE) as a PRR.
  • To explore RAGE's signaling mechanisms in inflammation, potentially paralleling those of TLRs.
  • To discuss RAGE's involvement in complex diseases beyond direct infection.

Main Methods:

  • Literature review focusing on RAGE, TLRs, and their signaling pathways.
  • Analysis of studies linking RAGE to advanced glycation end products (AGEs) and endogenous ligands.
  • Examination of RAGE's role in NF-kappaB activation and inflammatory responses.

Main Results:

  • Advanced glycation end products (AGEs) binding to RAGE activates NF-kappaB, inducing proinflammatory factors.
  • RAGE interacts with endogenous ligands generated during cell death and tissue injury.
  • RAGE activation elicits inflammatory reactions, similar to TLR signaling pathways.

Conclusions:

  • RAGE may function as a PRR, utilizing signaling pathways analogous to TLRs to induce inflammation.
  • RAGE's role in recognizing host-derived ligands links it to chronic inflammatory diseases like diabetes, atherosclerosis, and neurodegeneration.
  • RAGE is implicated in regulating cellular homeostasis within the context of complex disease progression.

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