Cell membrane and associated uptake machinery

The cell membrane and associated uptake machinery constitute the primary interface between a cell and its environment, consisting of a phospholipid bilayer interspersed with various proteins such as transporters, ion channels, and receptors (Alberts et al., Molecular Biology of the Cell). This system is critical for maintaining cellular homeostasis, facilitating signal transduction, and regulating the selective entry of nutrients and ions. In a therapeutic context, this target is often addressed by drugs that either disrupt the physical integrity of the membrane or utilize specific transport pathways for cellular entry. For example, polyene antifungals like amphotericin B bind to membrane sterols to create pores, while polymyxin antibiotics interact with lipopolysaccharides in bacterial membranes to cause leakage (StatPearls, Amphotericin B; PubMed, Polymyxins). Furthermore, the uptake machinery, including endocytic pathways and solute carrier (SLC) transporters, is frequently exploited for the delivery of macromolecular drugs like antisense oligonucleotides and peptides (Nature Reviews Drug Discovery, Drug delivery across the cell membrane). Because this target encompasses a wide array of essential cellular components, drugs acting here often face challenges related to selectivity and systemic toxicity. Monitoring for biomarkers like lactate dehydrogenase release or changes in membrane potential is often necessary to assess the efficacy and safety of membrane-active agents. Overall, while not a single molecular entity, the cell membrane and its uptake systems are fundamental to the pharmacokinetics and pharmacodynamics of many clinical agents.

Other names

Plasma membraneCellular uptake systemMembrane transport systemCell envelope

Direct physical disruption of the lipid bilayer, formation of transmembrane pores, or modulation of active and passive transport proteins to alter cellular permeability or facilitate drug internalization.