Innate immune signaling pathways

Innate immune signaling pathways represent a broad category of molecular networks responsible for the rapid detection of pathogens and cellular stress, rather than a single therapeutic target (NIH, 2019). These pathways are initiated by various pattern recognition receptors (PRRs), such as Toll-like receptors (TLRs), NOD-like receptors (NLRs), and the cGAS-STING system, which recognize conserved molecular patterns known as PAMPs and DAMPs (NIH, 2021; Wikipedia, 2024). Upon activation, these sensors trigger complex intracellular cascades involving adaptors like MyD88 and STING, kinases like TBK1, and transcription factors like NF-κB and IRFs, leading to the production of pro-inflammatory cytokines and type I interferons (NIH, 2021). Dysregulation of these pathways is a hallmark of various diseases, including chronic inflammation, autoimmune disorders, and cancer, where they can either promote or inhibit tumor progression (Frontiers in Immunology, 2024; NIH, 2019). Therapeutic strategies involve using agonists to boost immune responses in oncology and infectious diseases, or inhibitors to mitigate excessive inflammation in autoinflammatory conditions (Journal of Microbiology, 2025; MDPI, 2025). However, systemic activation of these pathways carries significant risks, such as cytokine release syndrome and tissue damage (NIH, 2025; Journal of Microbiology, 2025). Understanding the complex crosstalk between these pathways is essential for developing precise immunomodulatory therapies (NIH, 2025).

Other names

Innate immune pathwaysInnate immunity signalingPRR signaling pathwaysPattern recognition receptor signaling

Agonism of pattern recognition receptors (PRRs) to enhance anti-tumor and antiviral responses; antagonism or inhibition of PRRs and downstream signaling components to suppress hyperinflammation and autoimmune reactions.