Neuronal lipid microdomain (LR)

Neuronal lipid microdomains, or lipid rafts, are specialized, dynamic regions of the neuronal plasma membrane enriched in cholesterol and sphingolipids that serve as platforms for signal transduction and protein trafficking (Pike, 2006, J Lipid Res). These domains organize critical neuronal proteins, including neurotransmitter receptors and ion channels, thereby regulating synaptic plasticity and neurotransmission (Siawrys et al., 2022, IJMS). In neurodegenerative diseases like Alzheimer's, lipid rafts are the primary sites for the amyloidogenic processing of amyloid precursor protein (APP) by beta- and gamma-secretases, facilitating the production of neurotoxic amyloid-beta (Simons & Gerl, 2010, Nat Rev Mol Cell Biol). They also play a role in the aggregation of alpha-synuclein and the propagation of prions (Michel & Bakovic, 2007, FEBS J). Pharmacological strategies targeting these microdomains often involve modulating lipid levels, such as using statins to deplete cholesterol or omega-3 fatty acids to alter membrane fluidity and protein clustering (Siawrys et al., 2022, IJMS). However, the lack of specificity for neuronal versus systemic membranes presents a significant therapeutic challenge, as disrupting these fundamental structures can interfere with essential cellular signaling (Simons & Gerl, 2010, Nat Rev Mol Cell Biol).

Other names

Lipid raftsMembrane raftsDetergent-resistant membranesCholesterol-rich microdomainsNeuronal lipid raftsNeuronal membranes

Modulation of membrane lipid composition, cholesterol depletion, and disruption of protein-lipid scaffolding to alter signaling and proteolytic processing.