Multiple cellular pathways and pattern-recognition receptors (PRRs)

The term Multiple cellular pathways and pattern-recognition receptors refers to a broad collection of germline-encoded host sensors and their associated signaling cascades rather than a single therapeutic target. Pattern-recognition receptors (PRRs) are essential components of the innate immune system that detect pathogen-associated molecular patterns (PAMPs) from microbes or damage-associated molecular patterns (DAMPs) from injured host cells [Takeuchi, O., & Akira, S. (2010). Cell, 140(6), 805-820]. Major PRR families include Toll-like receptors (TLRs), NOD-like receptors (NLRs), RIG-I-like receptors (RLRs), C-type lectin receptors (CLRs), and cytosolic DNA sensors like cGAS [Medzhitov, R. (2007). Nature, 449(7164), 819-826]. Activation of these receptors triggers complex intracellular pathways, such as the NF-κB, MAPK, and Interferon Regulatory Factor (IRF) pathways, which lead to the production of pro-inflammatory cytokines and type I interferons [Kawai, T., & Akira, S. (2010). Nature Immunology, 11(5), 373-384]. Dysregulation of PRR signaling is a hallmark of various pathologies, including chronic inflammatory diseases, sepsis, autoimmune disorders, and the progression of certain cancers [Thompson, M. R., et al. (2011). Viruses, 3(6), 920-940]. Pharmacological intervention typically focuses on specific receptors within this group; for example, TLR agonists are utilized as vaccine adjuvants and in cancer immunotherapy to enhance immune surveillance, while PRR antagonists are investigated for treating systemic inflammation [Kaczanowska, S., et al. (2013). Current Opinion in Immunology, 25(2), 138-144]. Because this entry encompasses a vast array of distinct proteins and biological processes, it is considered a functional category or descriptive grouping rather than a specific, actionable molecular target for drug discovery.

Other names

Pattern-recognition receptorsInnate immune receptorsPRR signaling pathwaysInnate immune sensing pathways

Modulation of innate immune signaling through the activation or inhibition of specific receptors to regulate cytokine production and cellular activation.