Cytokine secretion pathways in activated immune and lung cells

Cytokine secretion pathways in activated immune and lung cells represent the coordinated biological processes responsible for the synthesis and release of signaling proteins that regulate inflammation and immune responses. In the respiratory system, these pathways are primarily activated in alveolar macrophages, bronchial epithelial cells, and recruited leukocytes in response to stimuli such as viral infections, bacteria, or environmental toxins (Nature Reviews Immunology, 2020). Central to these processes are signaling hubs like the NF-κB and JAK/STAT pathways, which drive the expression of pro-inflammatory cytokines including IL-1β, IL-6, and TNF-α (Frontiers in Immunology, 2021). Pathological overactivation of these pathways can result in a "cytokine storm," leading to severe lung injury, increased vascular permeability, and multi-organ failure, as seen in conditions like ARDS and COVID-19 (The Lancet, 2020). Therapeutic strategies focus on modulating these pathways using monoclonal antibodies to neutralize cytokines or small molecule inhibitors to block intracellular signaling, thereby dampening the hyperinflammatory response while attempting to maintain baseline immune function (New England Journal of Medicine, 2021).

Other names

Cytokine release pathwaysPro-inflammatory signaling cascadesCytokine storm mechanismsLung inflammatory signaling

Drugs targeting these pathways function by neutralizing specific secreted cytokines, blocking their respective receptors, or inhibiting intracellular signaling molecules like Janus kinases (JAKs) to prevent the transcription and release of inflammatory mediators.