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A New Ligustrazine Derivative-Selective Cytotoxicity by Suppression of NF-κB/p65 and COX-2 Expression on Human Hepatoma Cells. Part 3.

Abstract：

:A new anticancer ligustrazine derivative, 3β-hydroxyolea-12-en-28-oic acid- 3,5,6-trimethylpyrazin-2-methylester (T-OA, C38H58O3N2), was previously reported. It was synthesized via conjugating hepatoprotective and anticancer ingredients of traditional Chinese medicine. We found that T-OA exerted its anticancer activity by preventing the expression of nuclear transcription factor NF-κB/p65 and COX-2 in S180 mice. However, the selective cytotoxicity of T-OA on various kinds of cell lines has not been studied sufficiently. In the present study, compared with Cisplatin, T-OA was more toxic to human hepatoma cell line Bel-7402 (IC50 = 6.36 ± 1.56 µM) than other three cancer cell lines (HeLa, HT-29, BGC-823), and no toxicity was observed toward Madin-Darby canine kidney cell line MDCK (IC50 > 150 µM). The morphological changes of Bel-7402 cells demonstrated that T-OA had an apoptosis-inducing effect which had been substantiated using 4',6-diamidino-2-phenylindole (DAPI) staining, acridine orange (AO)/ethidium bromide (EB) staining, flow cytometry and mitochondrial membrane potential assay. Combining the immumohistochemical staining, we found T-OA could prevent the expression of NF-κB/p65 and COX-2 in Bel-7402 cells. Both of the proteins have been known to play roles in apoptosis and are mainly located in the nuclei. Moreover subcellular localization was performed to reveal that T-OA exerts in nuclei of Bel-7402 cells. The result was in accordance with the effects of down-regulating the expression of NF-κB/p65 and COX-2.

journal_name

Int J Mol Sci

journal_title

International journal of molecular sciences

authors

Zhang C,Yan W,Li B,Xu B,Gong Y,Chu F,Zhang Y,Yao Q,Wang P,Lei H

doi

10.3390/ijms160716401

subject

Has Abstract

pub_date

2015-07-17 00:00:00

pages

16401-13

issue

7

issn

1422-0067

pii

ijms160716401

journal_volume

16

pub_type

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