Optimization of Important Early ADME(T) Parameters of NADPH Oxidase-4 Inhibitor Molecules

Gabor Borbely, Monika Huszar, Attila Varga, Krisztina Futosi, Attila Mocsai, Laszlo Orfi, Miklos Idei, Jozsef Mandl; Gyorgy Keri, Tibor Vantus

Abstract

Through their reactive oxygen species (ROS) producing function, NADPH oxidase (NOX) enzymes have been linked to several oxidative stress related diseases. In our recently published paper [1] we have already shown the NOX4 inhibitory effect of diverse, molecule sub-libraries and their biological importance. We also presented our work connected to potential anti-tumour molecules and the relationship between their biological activity and physico-chemical properties [2]. As an extension of these studies further physico-chemical and biological investigation has been carried out on a molecule group included NOX4 inhibitory chromanone compounds. Here we describe the optimization of early ADME(T) parameters determining lipophilicity, phospholipophilicity and permeability linked to structure-activity relationship. We prove that optimal lipo- and phospholipophilicty can be also determined in case of NOX4 inhibitors and a comparison will be made between the chemically similar isochromanone and chromanone molecular libraries. It will be also shown how to predict the effect of different substituents on permeability, lipo- and phospholipophilicity and also the biological differences between anti-tumour molecules and NOX4 inhibitors according to their penetration ability.

Keywords: ADME(T), haracterization, compounds, disease, inhibitor, NADPH oxidase 4, relationship, species, enzymes, stress