Host cell proteins and membranes

"Host cell proteins and membranes" are not single, discrete molecular targets but rather broad categories referring to (1) the proteins produced by the host organism—often considered as impurities to be removed during biopharmaceutical manufacturing, due to potential immunogenicity, instability, or reduced efficacy of therapeutic products; and (2) the physical lipid bilayer structure (cell membrane or plasma membrane) encapsulating a cell, involved in compartmentalization, signal transduction, and as the interface for host-pathogen interactions. These terms collectively do not denote a unique biological target such as a receptor, enzyme, or transporter and cannot be specifically targeted by drugs, though individual proteins or components within these broader categories (e.g., a specific membrane protein, such as a receptor, or a defined contaminant protein) may serve as bona fide therapeutic targets or biomarkers in specific contexts.

Other names

Host cell proteinsHost cell membraneHost cell membranes

Not applicable (no defined, targetable, actionable mechanism as a "target"; individual membrane proteins or host factors may be targeted, but not the broad classes)