Essential fatty acid metabolic pathways (omega-3 and omega-6)

Omega-3 and omega-6 metabolic pathways describe the enzymatic transformations of two families of essential polyunsaturated fatty acids, linoleic acid (omega-6) and alpha-linolenic acid (omega-3), into longer-chain, bioactive lipids such as arachidonic acid, eicosapentaenoic acid, and docosahexaenoic acid. These metabolites are incorporated into cell membranes, influencing their fluidity and serving as precursors to powerful paracrine signaling molecules (eicosanoids, resolvins) that regulate key biological processes including inflammation, cardiovascular health, neurologic development, and immune response. The pathways involve competition for the same enzymes, notably FADS1 and FADS2 desaturases, and dietary intake strongly impacts their balance and physiological effects[1][2][3][4][5]. This is not a single molecular target but a complex network of molecules, enzymes, and cell structural components.

Other names

Omega-3 pathwayOmega-6 pathwayPolyunsaturated fatty acid metabolismEssential fatty acid pathwaysPUFA pathways

Alteration of fatty acid composition in membranes; Modulation of bioactive lipid synthesis (e.g., inhibition of arachidonic acid-derived eicosanoids via competition); Anti-inflammatory effects via production of resolvins, protectins, and competitive inhibition of pro-inflammatory mediators