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A computational Petra/Osiris/Molinspiration/DFT(POM/DFT) based model has been developed for the identification of physico-chemical parameters governing the bioactivity of ruthenium-staurosporine complexes 2-4 containing an antitumoral-kinase (TK) pharmacophore sites. The four compounds 1-4 analyzed here were previously screened for their antitumor activity, compounds 2 and 4 are neutral, whereas analogue compound 3 is a monocation with ruthenium(II) centre. The highest anti- antitumor activity was obtained for compounds 3 and 4, which exhibited low IC(50) values (0.45 and 8 nM, respectively), superior to staurosporine derivative (pyridocarbazole ligand 1, 150 · 10(3) nM). The IC(50) of 3 (0.45 nM), represents 20,000 fold increased activity as compared to staurosporine derivative 1. The increase of bioactivity could be attributed to the existence of pi-charge transfer from metal-staurosporine to its (CO(δ)--NH(δ+)) antitumor pharmacophore site.

acta chimica slovenica

Computational POM and DFT Evaluation of Experimental in-vitro Cancer Inhibition of Staurosporine-Ruthenium(II) Complexes: The Power Force of Organometallics in Drug Design