Journal
JOURNAL OF MEDICINAL CHEMISTRY
Volume 55, Issue 8, Pages 3667-3677Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jm201548z
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The absorption, distribution, metabolism, excretion, and toxicity (ADMET) of a compound is dependent on physicochemical properties such as molecular size, lipophilicity, and ionization state. However, much less is known regarding the relationship between ADMET and the molecular topology. In this study two descriptors related to the molecular topology have been investigated, the fraction of the molecular framework (f(MF)) and the fraction of sp(3)-hybridized carbon atoms (Fsp(3)). f(MF) and Fsp(3), together with standard physicochemical properties (molecular size, ionization state, and lipophilicity), were analyzed for a set of ADMET assays. It is shown that aqueous solubility, Caco-2 permeability, plasma protein binding, human ether-a-go-go-related potassium channel protein inhibition, and CYP3A4 (CYP = cytochrome P450) inhibition are influenced by the molecular topology. These findings are in most cases independent of the already well-established relationships between the properties and molecular size, lipophilicity, and ionization state.
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