Host immune signaling pathways

Host immune signaling pathways represent the complex network of biochemical signals that coordinate the body's response to pathogens, tissue damage, and malignant cells (Janeway et al., 2001). These pathways include innate mechanisms like Toll-like receptor (TLR) signaling and adaptive mechanisms such as T-cell receptor (TCR) and B-cell receptor (BCR) signaling (Abbas et al., 2018). While critical for defense, dysregulation of these pathways is a hallmark of autoimmune diseases, chronic inflammation, and cancer. Therapeutic intervention often involves targeting specific nodes within these pathways, such as kinases (e.g., JAK) or cytokines (e.g., TNF-alpha), to either suppress overactive responses or stimulate anti-tumor immunity (O'Shea et al., 2013). Because this term encompasses a vast array of distinct molecular targets, it is generally considered a biological category rather than a single druggable entity.

Other names

Immune signalingImmunological signaling cascadesHost defense pathwaysImmune system signaling

Pharmacological modulation of host immune signaling pathways typically involves the inhibition or activation of specific molecular nodes, such as cytokines, cell surface receptors, or intracellular kinases, to restore immune homeostasis or enhance anti-pathogen and anti-tumor responses (O'Shea et al., 2013).