Cellular phospholipid membrane

The **cellular phospholipid membrane** refers to the double-layered structure that delimits all biological cells and their organelles. Its backbone comprises amphipathic phospholipids, with hydrophilic heads facing water and hydrophobic tails sheltered in the bilayer's interior, creating a semi-permeable barrier protecting cellular integrity. Cellular phospholipid membranes also host embedded proteins, sterols (cholesterol), and carbohydrates, which endow cells with selective permeability, dynamic flexibility, and capacity for cell signaling, cell-cell interaction, and maintenance of homeostasis[1][2][3][4][5][6][7][8]. These membranes are foundational to nearly all physiological functions, but are not considered canonical therapeutic targets. Instead, they serve as the context in which true drug targets—a myriad of receptors, enzymes, channels, and transporters—are localized and function. Cellular phospholipid membranes are core structural elements—not direct molecular drug targets. They provide the environment required for true targets (receptors, enzymes, channels, etc.) to function. Targeting the membrane itself is generally non-specific and associated with higher toxicity, and therefore is not a standard pharmacological approach[1][5][6].

Other names

cell membraneplasma membranelipid bilayer

Drugs interacting with the cellular phospholipid membrane primarily function through: Disruption of lipid organization or membrane fluidity (e.g., detergents, some anesthetics), blocking ion flux by disrupting bilayer structure, or alteration of signaling by modifying the membrane lipid environment.