期刊
JOURNAL OF INORGANIC BIOCHEMISTRY
卷 210, 期 -, 页码 -出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.jinorgbio.2020.111155
关键词
Antitumor agents; Breast cancer; PARP inhibitor; Ruthenium(II)
资金
- Ministry of Education, Science and Technological Development of the Republic of Serbia [451-03-68/2020-14/200168, 451-03-68/2020-14/200043]
Inhibitors of poly(ADP-ribose) polymerase-1 (PARP-1) showed remarkable clinical efficacy in BRCA-mutated tumors. Based on the rational drug design, derivatives of PARP inhibitor 3-aminobenzamide (3-AB), 2-amino-4methylbenzamide (L1) and 3-amino-N-methylbenzamide (L2), were coordinated to the ruthenium(II) ion, to form potential drugs affecting DNA and inhibiting PARP enzyme. The four conjugated complexes of formula: C1 [(eta(6)-toluene)Ru(L1)Cl]PF6, C2 [(eta(6)-p-cymene)Ru(L1)Cl]PF6, C3 [(eta(6)-toluene)Ru(L2)Cl-2] and C4 [(eta(6)-p-cymene) Ru(L2)Cl-2], have been synthesized and characterized. Colorimetric 3-(4.5-dimethylthiazol-2-yl)-2.5-diphenyltetrazolium bromide (MTT) assay showed the highest antiproliferative activity of C1 in HCC1937, MDA-MB231, and MCF-7 breast cancer cells. Efficiency of inhibition of PARP-1 enzymatic activity in vitro decreased in order: C2 C4 > 3-AB > C1 > C3. ICP-MS study of intracellular accumulation and distribution in BRCA1-mutated HCC1937 revealed that C1-C4 entered cells within 24 h. The complex C1 showed the highest intracellular accumulation, nuclear-targeting properties, and exhibited the highest DNA binding (39.2 +/- 0.6 pg of Ru per mu g of DNA) that resulted in the cell cycle arrest in the S phase.
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