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Chem Biol Interact. 2015 Dec 5;242:1-12. doi: 10.1016/j.cbi.2015.07.011. Epub 2015 Sep 8.

Proapoptotic activity and ABCC1-related multidrug resistance reduction ability of semisynthetic oleanolic acid derivatives DIOXOL and HIMOXOL in human acute promyelocytic leukemia cells.

Author information

1
Department of Clinical Chemistry and Molecular Diagnostics, Poznan University of Medical Sciences, Przybyszewskiego Str. 49, 60-355 Poznan, Poland. Electronic address: apaszel@ump.edu.pl.
2
Department of Clinical Chemistry and Molecular Diagnostics, Poznan University of Medical Sciences, Przybyszewskiego Str. 49, 60-355 Poznan, Poland.
3
Department of Organic Chemistry, Poznan University of Medical Sciences, Grunwaldzka Str. 6, 60-780 Poznan, Poland.

Abstract

One of the main problems of present-day oncology is the ability of neoplastic cells to develop different mechanisms of resistance to chemotherapeutic agent. A natural compound oleanolic acid (OA) was found to be active against many types of neoplastic cells. This paper examines the influence of eight semisynthetic oleanolic acid derivatives on drug-sensitive human acute promyelocytic leukemia cell line HL-60 and its multidrug resistant subline ABCC1 overexpressing HL-60/AR. Viability inhibition, proapoptotic activity, as well as influence on the ABCC1 gene expression level, ability to inhibit the transport function of multidrug resistance associated protein 1 (ABCC1) and to alter its level by the tested compounds, were evaluated. The most potent compounds were DIOXOL (methyl 3,11-dioxoolean-12-en-28-oate) and HIMOXOL (methyl 3-hydroxyimino-11-oxoolean-12-en-28-oate). DIOXOL was most efficient in inducing apoptosis of HL-60 cells. It activated both intrinsic and extrinsic pathways of apoptotic cell death. Proapoptotic properties of DIOXOL were probably related to the significant decrease of p65 NFκB level and inhibition of its translocation to the nucleus. In turn, HIMOXOL was the most potent compound against resistant HL-60/AR cells. It inhibited ABCC1 transport function (short time response) and decreased the level of ABCC1 protein (long time response) as a result of reduction of ABCC1 expression.

KEYWORDS:

ABCC1; Acute promyelocytic leukemia cells; Apoptosis; Multidrug resistance; Oleanolic acid derivatives

PMID:
26362502
DOI:
10.1016/j.cbi.2015.07.011
[Indexed for MEDLINE]

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