Transport, metabolism, cytotoxicity and effects of novel taxanes on the cell cycle in MDA-MB-435 and NCI/ADR-RES cells

0380490 - ÚI 2013 RIV DE eng J - Journal Article
Ehrlichová, M. - Ojima, I. - Chen, J. - Václavíková, R. - Němcová-Fürstová, V. - Vobořilová, J. - Šimek, Petr - Horský, S. - Souček, P. - Kovář, J. - Brabec, Marek - Gut, I.
Transport, metabolism, cytotoxicity and effects of novel taxanes on the cell cycle in MDA-MB-435 and NCI/ADR-RES cells.
Naunyn-Schmiedeberg's Archives of Pharmacology. Roč. 385, č. 10 (2012), s. 1035-1048. ISSN 0028-1298. E-ISSN 1432-1912
R&D Projects: GA MZd(CZ) NT11513
Grant - others:GA MZd(CZ) NS9803; GA ČR(CZ) GA301/09/0362
Institutional research plan: CEZ:AV0Z10300504; CEZ:AV0Z50070508
Keywords : taxanes * multidrug resistance * transport * drug metabolism * ABC transporters * cell cycle
Subject RIV: EB - Genetics ; Molecular Biology; BB - Applied Statistics, Operational Research (UIVT-O)
Impact factor: 2.147, year: 2012

Resistance of tumours to taxanes causes chemotherapy failure in numerous patients. Resistance is partly due to the low tumour uptake of taxanes and their rapid metabolism. Structural modifications of taxanes can reduce their P-glycoprotein-related efflux or decrease metabolism and consequently increase taxane efficiency. This study compared cytotoxicity and effects of the cell cycle, transport and metabolism of novel taxanes SB-T-1102, SB-T-1103, SB-T-1214 and SB-T-1216, fluorinated SB-T-12851, SB-T-12852, SB-T-12853, SB-T-12854 and IDN5109 with paclitaxel in paclitaxel-sensitive (MDA-MB-435) and paclitaxel-resistant (NCI/ADR-RES) human cancer cells. We have shown before that NCI/ADR-RES cells were 1,000-fold less sensitive to paclitaxel than MDA-MB-435 cells in correspondence to P-glycoprotein overexpression and up to 20-fold lower uptake of the drug in the resistant cells. The uptake of novel taxanes was 1.2 to 3.8 times lower than that of paclitaxel in the MDA-MB-435 cells, but 1.5 to 6.5 times higher in NCI/ADR-RES cells. NCI/ADR-RES cells were correspondingly only 2- to 6.6-fold less sensitive than the MDA-MB-435 cells to novel taxanes. Both cell lines showed minimal metabolism of the novel taxanes which was therefore not responsible for their different sensitivity, the observed differences in their individual efficiency and higher effects than paclitaxel. All novel taxanes caused G(2)/M block of the cell cycle similar to paclitaxel, but lower at concentrations by order of magnitude. Thus, structural modifications of taxanes resulting in their decreased P-glycoprotein-related transport probably caused their higher efficiency than paclitaxel in multidrug-resistant NCI/ADR-RES tumour cells.
Permanent Link: http://hdl.handle.net/11104/0211186