Host immune pathways

Host immune pathways represent the integrated network of molecular signaling cascades and cellular interactions that mediate the body's defense against exogenous pathogens and endogenous threats (Source: NIH, National Institute of Allergy and Infectious Diseases). These pathways are broadly divided into innate immunity, which utilizes germline-encoded receptors to provide immediate responses, and adaptive immunity, which involves somatic rearrangement of receptors for highly specific antigen recognition (Source: Nature Reviews Immunology). Dysregulation of these pathways is central to the pathogenesis of diverse conditions, including autoimmune diseases where the system attacks self-tissue, and oncology, where tumors exploit immune checkpoints to evade detection (Source: PubMed, PMID: 28190768). While not a single drug target itself, the individual components of these pathways—such as Janus kinases (JAKs), tumor necrosis factor (TNF), and programmed cell death protein 1 (PD-1)—serve as critical nodes for therapeutic intervention (Source: StatPearls, Immune Response). Drugs targeting these pathways aim to restore homeostasis, either by suppressing pathological inflammation or by enhancing the immune system's ability to eradicate pathogens or malignant cells (Source: PubMed, PMID: 30237530). Because 'Host immune pathways' refers to a broad biological system rather than a single molecular entity, it is generally categorized as a therapeutic area or a mechanism of action class rather than a discrete drug target.

Other names

Immune signaling pathwaysHost defense pathwaysInnate and adaptive immune signaling

Immunomodulation via the activation or inhibition of specific signaling nodes within the innate and adaptive immune systems.