Omega-3 polyunsaturated fatty acids (Omega-3 PUFAs)

Omega‑3 polyunsaturated fatty acids are essential dietary fats that play a critical role in brain health by integrating into neuronal membranes, thereby influencing their fluidity and function. The two most studied omega‑3s in the context of brain function are eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). These molecules modulate neurotransmission by affecting the synthesis, release, uptake, and receptor binding of key neurotransmitters such as serotonin and dopamine. Deficiency in omega‑3 PUFAs is associated with altered dopaminergic and serotonergic signaling, reduced synaptic plasticity, impaired cognitive function, mood disturbances, and increased neuroinflammation[1][2][5]. Omega‑3 PUFAs also act as ligands for several receptors including G protein-coupled receptor 40 (GPR40), G protein-coupled receptor 120 (GPR120), peroxisome proliferator–activated receptors (PPARs), and retinoid X receptor α. They can regulate gene expression through epigenetic mechanisms such as DNA methylation or histone modification. In addition to their direct effects on membrane properties—such as enhancing membrane fluidity—they exert anti-inflammatory actions by reducing pro-inflammatory cytokines like IL‑6 or IL‑1β[1][4]. Recent research has shown that free omega‑3 fatty acids can influence glutamate transporter activity by dissipating sodium ion gradients across neuronal membranes; this may affect glutamate clearance from synapses with implications for excitotoxicity risk in neurodegenerative diseases[3]. Supplementation with omega‑3 PUFAs has been linked to increased levels of brain-derived neurotrophic factor (BDNF), improved cognition at midlife, enhanced synaptic plasticity, reduced oxidative stress damage to neurons, modulation of HPA axis activity under stress conditions—and overall support for healthy neurotransmission networks involved in mood regulation[2][6]. However—omega‑3 polyunsaturated fatty acids themselves are not a single molecular target but rather a class of bioactive lipids that modulate multiple targets within neural tissue. Thus "omega polyunsaturated fatty acids supplementation effect on neuronal membrane function/neurotransmission" is not a canonical therapeutic target but describes a broad mechanism involving many molecular players. If you need structured information about specific receptors or enzymes directly targeted by omega–3 PUFAs—such as GPR40/FFAR1 or GPR120/FFAR4—please specify which molecule/receptor you wish to focus on.

Other names

n-3 polyunsaturated fatty acidsomega-3 fatty acidsEPA (eicosapentaenoic acid)DHA (docosahexaenoic acid)