当前位置： SCI文献检索 > JOURNAL OF INORGANIC BIOCHEMISTRY期刊下所有文献 > Structure-activity relationships in a series of auranofin analogues showing remarkable antiproliferative properties.

Structure-activity relationships in a series of auranofin analogues showing remarkable antiproliferative properties.

Abstract：

:The antiproliferative properties of a series of structurally-related gold(I) and silver(I) linear complexes inspired to the clinically established gold-based drug auranofin were investigated in A2780 ovarian cancer cells and in their auranofin (A2780/AF-R) and cisplatin (A2780/CDDP-R) resistant counterparts. In A2780 cells and in the cisplatin-resistant subline, gold-based analogues manifested a cytotoxicity profile comparable or superior to auranofin, while the silver-based analogues were less active; both gold and silver complexes overcame cisplatin resistance. Yet, a high degree of cross resistance toward gold analogues was noticed in A2780/AF-R cells. In the same cell line cross-resistance for silver analogues was also observed, though lower. All metal complexes were scrutinized for their ability to inhibit thioredoxin reductase (TrxR), the putative primary target for auranofin: overall, gold compounds were more potent TrxR inhibitors than the corresponding silver compounds, probably, as the consequence of the stronger binding of gold to the active site selenocysteine residue. These results highlight that the thiosugar ligand of auranofin is not essential for cytotoxicity while the nature of the metal center (gold/silver) plays a relevant role in its modulation. In addition, a rather clear correlation was found between cytotoxic potency of tested compounds and their ability to inhibit TrxR activity, being gold compounds more effective than silver analogues. However, the residual TrxR activity, measured in A2780 cells treated with the half-maximal inhibitory concentrations of various metal complexes, resulted far higher than expected. These results suggest that additional cytotoxic mechanisms must be operative. The implications of these results are discussed.

journal_name

J Inorg Biochem

journal_title

Journal of inorganic biochemistry

authors

Landini I,Massai L,Cirri D,Gamberi T,Paoli P,Messori L,Mini E,Nobili S

doi

10.1016/j.jinorgbio.2020.111079

subject

Has Abstract

pub_date

2020-07-01 00:00:00

pages

111079

eissn

0162-0134

issn

1873-3344

pii

S0162-0134(20)30107-0

journal_volume

208

pub_type

杂志文章

在线工具

Structure-activity relationships in a series of auranofin analogues showing remarkable antiproliferative properties.