As. Kulkarni et Aj. Hopfinger, Membrane-interaction QSAR analysis: Application to the estimation of eye irritation by organic compounds, PHARM RES, 16(8), 1999, pp. 1245-1253
Purpose. The purpose of this study was to explore a potential mechanism of
eye irritation, and to construct a corresponding general quantitative struc
ture-activity relationship (QSAR) model, in terms of diversity of irritant
chemical structure, based on the Draize eye irritation ECETOC data set.
Methods. Molecular dynamic simulation (MDS) was used to generate intermolec
ular membrane-solute interaction properties. These intermolecular propertie
s were combined with intramolecular physicochemical properties and features
of the solute (irritant) to construct QSAR models using multi-dimensional
linear regression and the Genetic Function Approximation (GFA) algorithm.
Results. Significant QSAR models for estimating eye irritation potential we
re constructed in which solute aqueous solvation free energy and solute-mem
brane interaction energies are the principle correlation descriptors. These
physicochemical descriptors were selected from a trial set of 95 descripto
rs for 18 structurally diverse compounds fully representative of the ECETOC
set of 38 compounds.
Conclusions. Combining intermolecular solute-membrane interaction descripto
rs with intramolecular solute descriptors yields statistically significant
eye irritation QSAR models. The resultant OSAR models support an eye irrita
tion mechanism of the action in which increased aqueous solubility of the i
rritant and its strength of binding to the membrane both increase eye irrit
ation.