Cell membranes and intracellular macromolecules

Cell membranes and intracellular macromolecules represent a broad class of biological structures that serve as the site of action for various therapeutic agents (Goodman & Gilman's The Pharmacological Basis of Therapeutics). Cell membranes, composed primarily of lipid bilayers and embedded proteins, are essential for maintaining cellular homeostasis and are targeted by specific antibiotics and antifungals, such as Amphotericin B, that disrupt their permeability (StatPearls, 2023). Intracellular macromolecules, including DNA, RNA, and various structural proteins, are critical for genetic expression and cellular function; these are often targeted by cytotoxic chemotherapy agents like alkylators that form covalent adducts (NCI, 2024). Because these targets are ubiquitous and perform fundamental biological roles, drugs that interact with them often lack the high specificity seen in modern targeted therapies. Consequently, therapeutic interventions involving these broad targets are frequently associated with significant side effects and narrow therapeutic indices (PubMed, 2021). This designation is generally considered a category of targets rather than a single, specific molecular entity.

Other names

Cellular membranesIntracellular targetsBiological macromoleculesCellular structural components

Drugs targeting these structures typically act through physical disruption of the lipid bilayer or through chemical modification (e.g., alkylation) of nucleic acids and proteins (StatPearls, 2023; NCI, 2024).