Synthesis, characterization, DNA binding, topoisomerase I inhibition and antiproliferation activities of three new functionalized terpyridine platinum(II) complexes.
J Inorg Biochem
; 192: 17-24, 2019 03.
Article
in En
| MEDLINE
| ID: mdl-30554070
ABSTRACT
Three new platinum(II) complexes with pendent morpholine were synthesized, namely complex 1 ([Pt(L)Cl]CF3SO3), complex 2 ([Pt(L)(NH3)](CF3SO3)2) and complex 3 ([Pt(L)(PPh3)](CF3SO3)2), where Lâ¯=â¯4'-[4-(4-morpholinobutyloxy)phenyl]-2,2'6',2â³-terpyridine and PPh3â¯=â¯triphenylphosphine. The detailed molecular structures of complex 3, L and its precursor L' (1,4'-[4-(4-bromobutyloxy)phenyl]-2,2'6',2â³-terpyridine) were determined by single crystal X-ray diffraction. An evaluation of in vitro cytotoxicity for both ligand and complexes was performed by methyl thiazolyl tetrazolium (MTT) assay in three cancer cell lines and normal cells as the control, respectively. IC50 values of complexes 1-3 were lower than those exhibited for the reference drug cisplatin, and selectivity of these complexes were greater than cisplatin. Among them, complex 3 with a leaving group PPh3 was found to be the most efficacious complex against certain cell lines, especially for cisplatin-resistant A549cisR cells. These complexes were found to bind DNA, induce efficient DNA unwinding. Meanwhile, topoisomerase (Topo) I inhibitory activities by three complexes were detected, and a minimum inhibitory concentration of 15⯵M of complex 3 was found totally inhibit Topo I activity.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Organoplatinum Compounds
/
DNA Topoisomerases, Type I
/
Topoisomerase I Inhibitors
/
Neoplasm Proteins
/
Neoplasms
/
Antineoplastic Agents
Limits:
Humans
Language:
En
Journal:
J Inorg Biochem
Year:
2019
Document type:
Article