Histone deacetylase inhibitor enhances the anti-tumor effect of gemcitabine: A special reference to gene-expression microarray analysis

被引:15
作者
Iwahashi, Shuichi [1 ]
Shimada, Mitsuo [1 ]
Utsunomiya, Tohru [1 ]
Morine, Yuji [1 ]
Imura, Satoru [1 ]
Ikemoto, Tetsuya [1 ]
Mori, Hiroki [1 ]
Hanaoka, Jun [1 ]
Saito, Yu [1 ]
机构
[1] Univ Tokushima, Inst Hlth Biosci, Dept Surg, Grad Sch, Tokushima 7708503, Japan
基金
日本学术振兴会;
关键词
cholangiocarcinoma; histone deacetylase inhibitor; valproic acid; microarray analysis; ingenuity pathways analysis; ACUTE PROMYELOCYTIC LEUKEMIA; TUMOR-SPECIFIC IMMUNITY; HLA-DR EXPRESSION; VALPROIC ACID; TRANSFORMED-CELLS; CANCER CELLS; CARCINOMA; DIFFERENTIATION; INFILTRATION; CISPLATIN;
D O I
10.3892/or.2011.1407
中图分类号
R73 [肿瘤学];
学科分类号
100214 ;
摘要
Histone deacetylase (HDAC) is strongly associated with epigenetic regulation and carcinogenesis, and its inhibitors induce the differentiation or apoptosis of cancer cells. Valproic acid (VPA) is one of the clinically available HDAC inhibitors. We investigated the anticancer effects of VPA in combination with gemcitabine (GEM) in the human cholangiocarcinoma cell line HuCCT1, and explored the mechanisms of the anticancer effects using microarray analysis. The anticancer effects of VPA or gemcitabine (GEM), and the effects of VPA combined with GEM, were studied by a cell proliferation assay. A microarray analysis was performed and the genes were picked up using GeneSpring GX11.5, followed by Ingenuity Pathways Analysis (IPA) and determination of gene expression by RT-PCR. GEM (5 nM) and VPA (0.5 mM) reduced proliferation by 23%, which significantly augmented the anticancer effect of GEM alone or VPA alone (P<0.01). Using microarray analysis, 43 genes were identified with the comparison between the GEM group and the GEM plus VPA combination group. Interactions were identified between genes of the 'Cellular Development' network relevant to the differentiation of cancer cells using IPA. Furthermore, GEM combined with VPA up-regulated the HLA-DRA expression compared to the single agents (P<0.01). VPA augmented the effects of GEM by enhancing the gene network mainly including HLA-DRA, possibly through the modification of cancer cell differentiation.
引用
收藏
页码:1057 / 1062
页数:6
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