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DFT studies of camptothecins cytotoxicity III: camptothecin, irinotecan and SN-38 Cover

DFT studies of camptothecins cytotoxicity III: camptothecin, irinotecan and SN-38

Open Access
|Aug 2022

Abstract

Geometries of camptothecin, irinotecan, SN-38, and of their hypothetical Cu(II) complexes were optimized at the B3LYP/6-311G* level of theory. Their electron structure, evaluated in terms of Mulliken population analysis and Quantum Theory of Atoms-in-Molecule, was subsequently related to in vitro cytotoxicity. Electron density transfer from the relevant active sites to Cu decreases in the sequence irinotecan > SN-38 > camptothecin. The absolute values of their metal-ligand interaction energies exhibit the same trend. Discrepancy with the least relative in vitro cytotoxicity of irinotecan can be explained by differences in its pharmacokinetics.

DOI: https://doi.org/10.2478/acs-2022-0009 | Journal eISSN: 1339-3065 | Journal ISSN: 1337-978X
Language: English
Page range: 72 - 84
Published on: Aug 23, 2022
Published by: Slovak University of Technology in Bratislava
In partnership with: Paradigm Publishing Services
Publication frequency: 2 issues per year
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© 2022 Marek Štekláč, Martin Breza, published by Slovak University of Technology in Bratislava
This work is licensed under the Creative Commons Attribution 4.0 License.