Innate immune pathway components

Innate immune pathway components represent a broad class of proteins and signaling molecules that constitute the body's immediate, non-specific defense system against pathogens and cellular stress (NIH, 2023). This category includes pattern recognition receptors (PRRs) such as Toll-like receptors (TLRs), NOD-like receptors (NLRs), and RIG-I-like receptors (RLRs), which detect conserved microbial structures or endogenous danger signals (Nature Reviews Immunology, 2021). Activation of these components triggers complex signaling cascades involving adaptors like MyD88 or STING, leading to the production of pro-inflammatory cytokines, interferons, and the induction of regulated cell death pathways like pyroptosis (PLOS, 2023). In clinical practice, these components are targeted to modulate the immune response: agonists (e.g., TLR or STING agonists) are used as vaccine adjuvants or cancer immunotherapies to stimulate anti-tumor immunity, while inhibitors (e.g., NLRP3 antagonists) are being developed to treat chronic inflammatory and autoimmune diseases (Journal of Clinical Investigation, 2025). However, therapeutic manipulation of these pathways carries risks such as cytokine release syndrome or the potential for inducing autoimmunity due to systemic immune activation (ResearchGate, 2023).

Other names

Innate immune sensorsPattern recognition receptorsPRRsInflammasome componentsInnate immunity signaling molecules

Agonism or antagonism of pattern recognition receptors (PRRs), inhibition of inflammasome assembly, or modulation of downstream signaling cascades such as the STING or NF-κB pathways.