Assessing the permeation rate of drug-like molecules across a lipid membrane is of paramount importance for pharmaceutical applications. While the Meyer-Overton rule relates the permeability coefficient to a few thermodynamic properties, its accuracy is limited by the homogeneity assumption. In this work, we extract an analogous relation for the permeation of a small solute through a lipid bilayer. This is obtained by systematically screening a subset of chemical space by means of high-throughput coarse-grained simulations, and relying on the accurate inhomogeneous solubility-diffusion model (ISDM). We connect the permeability coefficient of a compound to two molecular descriptors: partitioning free-energy and acid dissociation constant. In the ISDM the permeability is a functional of the potential of mean force. We discuss how–and when–combining together these profiles for a large variety of compounds can result in a smooth dependence of the permeability on the molecular descriptors. We focus on acidic molecules: for weak acids, the permeability largely depends on the main free-energy differences of the problem, which directly link to our molecular descriptors. For strong acids, the multivalued nature of the permeability requires to introduce a third variable, characterising the amphiphilicity of the small molecule. Abbreviations: CG: coarse-grained; HTCG: high-throughput coarse-grained; PMF: potential of mean force; ISDM: inhomogeneous solubility-diffusion model; DOPC: 1; 2-Dioleoyl-sn-glycero-3-phosphocholine.

Revisiting the Meyer-Overton rule for drug-membrane permeabilities / Menichetti, R.; Bereau, T.. - In: MOLECULAR PHYSICS. - ISSN 0026-8976. - 117:20(2019), pp. 2900-2909. [10.1080/00268976.2019.1601787]

Revisiting the Meyer-Overton rule for drug-membrane permeabilities

Menichetti R.;
2019-01-01

Abstract

Assessing the permeation rate of drug-like molecules across a lipid membrane is of paramount importance for pharmaceutical applications. While the Meyer-Overton rule relates the permeability coefficient to a few thermodynamic properties, its accuracy is limited by the homogeneity assumption. In this work, we extract an analogous relation for the permeation of a small solute through a lipid bilayer. This is obtained by systematically screening a subset of chemical space by means of high-throughput coarse-grained simulations, and relying on the accurate inhomogeneous solubility-diffusion model (ISDM). We connect the permeability coefficient of a compound to two molecular descriptors: partitioning free-energy and acid dissociation constant. In the ISDM the permeability is a functional of the potential of mean force. We discuss how–and when–combining together these profiles for a large variety of compounds can result in a smooth dependence of the permeability on the molecular descriptors. We focus on acidic molecules: for weak acids, the permeability largely depends on the main free-energy differences of the problem, which directly link to our molecular descriptors. For strong acids, the multivalued nature of the permeability requires to introduce a third variable, characterising the amphiphilicity of the small molecule. Abbreviations: CG: coarse-grained; HTCG: high-throughput coarse-grained; PMF: potential of mean force; ISDM: inhomogeneous solubility-diffusion model; DOPC: 1; 2-Dioleoyl-sn-glycero-3-phosphocholine.
2019
20
Menichetti, R.; Bereau, T.
Revisiting the Meyer-Overton rule for drug-membrane permeabilities / Menichetti, R.; Bereau, T.. - In: MOLECULAR PHYSICS. - ISSN 0026-8976. - 117:20(2019), pp. 2900-2909. [10.1080/00268976.2019.1601787]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/313128
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