Inflammatory signaling pathways in immune and epithelial cells

Inflammatory signaling pathways in immune and epithelial cells represent a broad category of biochemical cascades rather than a single molecular target. These pathways, including the NF-kappaB, JAK/STAT, and MAPK cascades, facilitate the essential communication between barrier-forming epithelial cells and recruited or resident immune cells (Nature Reviews Immunology, 2017). In a physiological state, these signals coordinate host defense against pathogens and promote tissue repair; however, chronic activation is a hallmark of inflammatory diseases such as Crohn's disease, ulcerative colitis, and rheumatoid arthritis (NIH, StatPearls, 2023). Epithelial cells act as primary sensors that release cytokines and chemokines, which in turn activate immune cells like macrophages and T-cells, creating a self-amplifying loop of inflammation (PubMed, PMC4864333). Therapeutic strategies often target specific nodes within these pathways, such as Janus kinases (JAKs) or specific cytokine receptors, to break this cycle. Because these pathways are integral to normal immune surveillance, pharmacological inhibition carries significant risks, including increased susceptibility to infections and potential long-term risks of malignancy (Frontiers in Immunology, 2021). Biotech development in this area currently focuses on increasing the specificity of inhibitors to target localized inflammation while sparing systemic immune function.

Other names

Pro-inflammatory signaling cascadesCytokine-mediated signalingImmune-epithelial crosstalkInflammatory cascades

Inhibition of intracellular kinases (e.g., Janus kinases), neutralization of extracellular cytokines (e.g., TNF-alpha, IL-6), or modulation of nuclear transcription factor activity (e.g., NF-kappaB) to reduce the expression of inflammatory mediators.