Lipocalin-2 induces apoptosis in human hepatocellular carcinoma cells through activation of mitochondria pathways

doi:10.1007/s12013-012-9370-1

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题名:	Lipocalin-2 induces apoptosis in human hepatocellular carcinoma cells through activation of mitochondria pathways
作者:	Chien, Ming-Hsien Ying, Tsung-Ho Yang, Shun-Fa Yu, Ji-Kuen Hsu, Chih-Wei Hsieh, Shu-Ching Hsieh, Yi-Hsien
贡献者:	中山醫大
关键词:	Lipocalin 2;Hepatocellular carcinoma;Apoptosis;Mitochondrial membrane potential
日期:	2012
上传时间:	2017-07-13T08:20:34Z (UTC)
出版者:	Cell Biochemistry and Biophysics
ISSN:	1085-9195
摘要:	Abstract Lipocalin 2 (LCN2) is a secreted, iron-binding glycoprotein that is abnormally expressed in some malignant human cancers. However, the roles of LCN2 in hepatocellular carcinoma (HCC) cells are unknown. In this study, we suggested the LCN2 and LCN2R were weak detected in the HCC cell lines, LCN2 and LCN2R were found to be down-regulated in tumor tissues in 16 HCC patients. MTT, DAPI, TUNEL, and flow cytometry analyses revealed that LCN2 overexpression dramatically inhibited cell viability, induced apoptosis features of cell-cycle arrest in sub-G1 phase, in DNA fragmentation, and in condensation of chromatin in Huh-7 and SK-Hep-1 cells. Western blots were used to detect the activation of caspase, pro-apoptosis, and anti-apoptosis protein expression in overexpress-LCN2 HCC cells. LCN2-induced apoptosis was characterized by cleavage of caspase-9, -8, -3, and PARP protein, and a reduction in the mitochondrial membrane potential (MMP). Furthermore, LCN2 also enhanced the down-regulated Bcl-2 and up-regulated the expression of Bax. In addition, our experiments with caspase inhibitors LEHD-FMK and IETD-FMK prevent LCN2-induced apoptosis. We also demonstrated that treatment of overexpress-LCN2 HCC cells with the LCN2 neutralized antibody also significantly attenuated LCN2-induced cell apoptosis. These findings indicate that LCN2 overexpression can effectively induce apoptosis of HCC cells and may be used as a potent therapy against human HCC.
URI:	http://dx.doi.org/10.1007/s12013-012-9370-1 https://ir.csmu.edu.tw:8080/ir/handle/310902500/17965
關聯:	Cell Biochemistry and Biophysics December 2012, Volume 64, Issue 3, pp 177–186
显示于类别:	[醫學系] 期刊論文

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