Cellular membrane phospholipid bilayer

The cellular membrane phospholipid bilayer is the fundamental structural matrix of all biological membranes, consisting of two layers of amphiphilic phospholipids with hydrophobic tails and hydrophilic heads (StatPearls, NBK555964). It serves as a critical semi-permeable barrier that maintains cellular homeostasis by regulating the transport of ions and molecules (NIH, Cell Membrane). In therapeutic contexts, the lipid bilayer is a primary target for several classes of anti-infective agents, such as polyene antifungals and lipopeptide antibiotics, which act by disrupting membrane integrity or forming lethal pores (PubMed, PMID: 25108313). Additionally, the composition and fluidity of the bilayer influence the function of embedded receptors and transporters, making it a site of action for various anesthetics and signaling modulators (PubMed, PMID: 18482075). Pathological changes in membrane lipid composition are associated with diseases like cancer and neurodegeneration, where altered membrane dynamics can drive disease progression (PubMed, PMID: 27039031).

Other names

Cell membrane phospholipidsLipid bilayerPlasma membraneBiological membranePhospholipid bilayer

Drugs targeting the lipid bilayer typically act through physical disruption of the membrane structure. This includes the formation of transmembrane pores (e.g., polyenes), detergent-like solubilization (e.g., polymyxins), or calcium-dependent insertion leading to rapid depolarization (e.g., daptomycin) (PubMed, PMID: 25108313). Some agents also alter membrane fluidity or thickness, indirectly modulating the activity of membrane-bound proteins (PubMed, PMID: 18482075).