Profile of the intermolecular forces governing the interaction of drugs with mucin

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The study highlights the balance of the intermolecular forces governing the interaction between drugs and mucin. The interaction strength is expressed as a retention factor k (data retrieved from the literature (Gargano et al., 2014)) obtained by a new bio-affinity chromatographic method in which the stationary phase is based on covalently immobilized mucin (porcine gastric mucin, PGM). A quantitative structure-property relationship (QSPR) between log k and 82 VolSurf+ descriptors was established and mechanistically interpreted. Results evidence that all blocks contribute similarly to the model; moreover, hydrogen bonding donor (HBD) properties of solutes favor the interaction with mucin; and thus, support their detrimental role on drug permeability.

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