Cellular membranes and plasma proteins

Cellular membranes and plasma proteins represent broad biological compartments and transport systems rather than a single, discrete therapeutic target. Cellular membranes are complex phospholipid bilayers that provide structural integrity to cells and organelles, facilitating signal transduction and selective permeability (Alberts et al., Molecular Biology of the Cell, 2002). Plasma proteins, primarily synthesized in the liver, include albumin and alpha-1-acid glycoprotein, which are essential for maintaining blood oncotic pressure and transporting hormones, fatty acids, and exogenous drugs (StatPearls, Physiology, Albumin, 2023). In pharmacology, these entities are critical for determining a drug's pharmacokinetic profile; for instance, high binding to plasma proteins can limit the free fraction of a drug available to reach its intended site of action (PubMed, PMC5139115). While certain drugs like daptomycin or amphotericin B exert their effects by disrupting microbial cellular membranes, the term as provided is too non-specific to be classified as a canonical drug target (Nature Reviews Drug Discovery, 2006). Consequently, this entry is typically treated as a physiological environment involved in drug distribution and safety rather than a specific receptor or enzyme.

Other names

Plasma protein binding sitesBiological membranesSerum proteinsBlood proteins

Drugs interact with plasma proteins through reversible non-covalent binding, which regulates the free drug concentration in systemic circulation. Interaction with cellular membranes typically involves non-specific partitioning into the lipid bilayer or targeted disruption of membrane integrity, as seen with certain antimicrobial and anesthetic agents.