Cellular lipid bilayer and eicosanoid synthesis machinery

The cellular lipid bilayer and eicosanoid synthesis machinery is an integrated biological system that converts membrane phospholipids into potent signaling molecules known as eicosanoids (StatPearls, NBK542314). This process begins with the activation of phospholipase A2 (PLA2), which cleaves arachidonic acid from the lipid bilayer in response to various stimuli such as injury or cytokines (NIH, PMC3155245). The liberated arachidonic acid is then metabolized via three major enzymatic pathways: the cyclooxygenase (COX) pathway, producing prostaglandins and thromboxanes; the lipoxygenase (LOX) pathway, producing leukotrienes and lipoxins; and the cytochrome P450 pathway (PubMed, 25242403). These mediators are essential for regulating inflammation, fever, pain perception, blood pressure, and platelet function. Because of its central role in the inflammatory response, this machinery is a primary target for numerous therapeutic agents. Nonsteroidal anti-inflammatory drugs (NSAIDs) like aspirin and ibuprofen inhibit COX enzymes to alleviate pain and inflammation, while drugs like zileuton and montelukast target the LOX pathway to manage asthma and allergic reactions (Wikipedia, Eicosanoid).

Other names

Arachidonic acid cascadeEicosanoid biosynthetic pathwayProstanoid and leukotriene synthesis systemEicosanoid synthesis machinery

Inhibition of enzymes within the arachidonic acid cascade, specifically cyclooxygenases (COX-1 and COX-2), lipoxygenases (5-LOX), and phospholipase A2 (PLA2), or antagonism of eicosanoid receptors to modulate inflammatory signaling.