期刊
CHEMISTRY AND PHYSICS OF LIPIDS
卷 194, 期 -, 页码 165-170出版社
ELSEVIER IRELAND LTD
DOI: 10.1016/j.chemphyslip.2015.07.023
关键词
Ceramide drug conjugate; Pentathiepin toxicity; Polysulfur ring; Reactive sulfur species
资金
- National Science Foundation [CHE-1464975]
- National Institutes of Health [SC1GM093830, HL083187]
- Canadian Breast Cancer Foundation (Prairie/NWT)
- Division Of Chemistry
- Direct For Mathematical & Physical Scien [1464975] Funding Source: National Science Foundation
A benzopentasulfane was synthesized in 8 steps with a ceramide attached through an amide bond to the 7-position of the heterocycle structure. The anticancer activity of this synthetic ceramide-benzopolysulfane drug conjugate was analyzed against five human cancer cell lines MDA-MB-231 (breast), DU145 (prostate), MIA PaCa-2 (pancreas), HeLa (cervix), and U251 (glioblastoma). The ceramide-benzopolysulfane conjugate had IC50 values ranging from 10 to >20 mu M with complete cell killing at 12.5 mu M for MDA-MB-231 and 20 mu M for DU145 and HeLa cells. The ceramide-benzopolysulfane conjugate had IC50 values 1.8 and 4.0 times lower than a PEG benzopolysulfane, N-(2-(2-(2-methoxyethoxy)ethoxy)ethyl)benzo[f][1,2,3,4,5]-pentathiepine-7-carboxamide, for MDA-MB-231 and DU145 cells, respectively. The parent unsubstituted benzopolysulfane, o-C6H4S5, had IC50 values 4.2 times lower and 2.7 times higher than the ceramide benzopolysulfane for MDA-MB-231 and DU145 cells, respectively. The results indicate that the polysulfur linkage is needed for activity since benzenedithiol, o-C6H4(SH)(2), had IC50 values greater than 30 mu M with little effect on MDA-MB-231 and DU145 cells. Thus, to account for the bioactivity, a bimolecular reaction of cellular thiol with the ceramide benzopolysulfane is a proposed followed by thiozone (S-3) extrusion. (C) 2015 Elsevier Ireland Ltd. All rights reserved.
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