Hydrophobic guest molecules

Hydrophobic guest molecules refer to a broad class of non-polar chemical entities that interact with host molecules, such as cyclodextrins, calixarenes, or cucurbiturils, through non-covalent interactions in supramolecular chemistry (Lehn, J. M., 1995, Supramolecular Chemistry). In a pharmacological context, these molecules are typically the active pharmaceutical ingredients (APIs) that require specialized delivery systems due to their poor solubility in aqueous environments (Davis and Brewster, 2004, Nature Reviews Drug Discovery). They are characterized by their tendency to partition into non-polar solvents or the hydrophobic cavities of carrier proteins and synthetic hosts (Southall et al., 2002, Journal of Physical Chemistry B). Because this term describes a physical property and a role in a chemical complex rather than a specific biological receptor, enzyme, or transporter, it is not considered a therapeutic target. Instead, the study of hydrophobic guest molecules is central to drug formulation and the development of host-guest delivery systems aimed at improving the bioavailability and stability of lipophilic drugs.

Other names

Lipophilic guestsNon-polar guest moleculesInclusion guests

Not applicable as a biological mechanism; refers to non-covalent host-guest complexation in chemical systems.