Suppressor effect of catechol-O-methyltransferase gene in prostate cancer.

Suppressor effect of catechol-O-methyltransferase gene in prostate cancer.
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DOI:
10.1371/journal.pone.0253877
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发表时间:
2021
期刊:
影响因子:
3.7
通讯作者:
Tanaka Y
Tanaka Y
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Hashimoto Y;Shiina M;Maekawa S;Kato T;Shahryari V;Kulkarni P;Dasgupta P;Yamamura S;Saini S;Tabatabai ZL;Dahiya R;Tanaka Y

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儿茶酚雌激素可引起基因突变并抵消其致癌性,儿茶酚-O-甲基转移酶 (COMT) 基因能够中和这些反应性化合物。在这项研究中,我们确定了 COMT 在前列腺癌中的功能作用和调节。癌症基因组图谱 (TCGA) 和临床样本的免疫组织化学分析均表明前列腺癌中 COMT 表达减少。此外,前列腺癌细胞系的蛋白质印迹分析显示 DuPro 和 DU145 中的 COMT 水平最低,因此这些细胞用于进一步分析。 COMT 的重新表达导致迁移能力受到抑制(伤口愈合测定)和细胞凋亡增强(流式细胞术分析),并且当用 4-羟基雌二醇攻击时,观察到细胞增殖显着减少(MTT 测定)。 COMT 也导致无胸腺小鼠的异种移植物生长受到抑制。作为一种机制,西方分析表明,由于 COMT,裂解的 CASP3 和 BID 增加,而 XIAP 和 cIAP2 减少。由于 COMT 在前列腺癌中表达较低,因此确定了其调控。数据库鉴定了几种能够结合 COMT 的 miRNA,根据 TCGA,观察到其中 miR-195 在前列腺癌中增加。实时 PCR 验证了临床前列腺癌标本以及 DuPro 和 DU145 中 miR-195 的上调,有趣的是,荧光素酶报告基因显示 miR-195 能够结合 COMT,并且过表达 miR-195 可以降低细胞中的 COMT。这些结果表明 COMT 通过激活细胞凋亡途径发挥保护作用,并为 miR-195 调节其表达发挥保护作用。因此,COMT 可能是前列腺癌治疗开发的潜在生物标志物和感兴趣的基因。
Catechol-estrogens can cause genetic mutations and to counteract their oncogenicity, the catechol-O-methyltransferase (COMT) gene is capable of neutralizing these reactive compounds. In this study, we determined the functional effects and regulation of COMT in prostate cancer. Both the Cancer Genome Atlas (TCGA) and immunohistochemical analysis of clinical specimens demonstrated a reduction of COMT expression in prostate cancer. Also, western analyses of prostate cancer cell lines show COMT levels to be minimal in DuPro and DU145 and thus, these cells were used for further analyses. Re-expression of COMT led to suppressed migration ability (wound healing assay) and enhanced apoptosis (flow cytometric analyses), and when challenged with 4-hydroxyestradiol, a marked reduction of cell proliferation (MTT assay) was observed. Xenograft growth in athymic mice also resulted in inhibition due to COMT. As a mechanism, western analyses show cleaved CASP3 and BID were increased whereas XIAP and cIAP2 were reduced due to COMT. As COMT expression is low in prostate cancer, its regulation was determined. Databases identified several miRNAs capable of binding COMT and of these, miR-195 was observed to be increased in prostate cancer according to TCGA. Real-time PCR validated upregulation of miR-195 in clinical prostate cancer specimens as well as DuPro and DU145 and interestingly, luciferase reporter showed miR-195 capable of binding COMT and overexpressing miR-195 could reduce COMT in cells. These results demonstrate COMT to play a protective role by activating the apoptosis pathway and for miR-195 to regulate its expression. COMT may thus be a potential biomarker and gene of interest for therapeutic development for prostate cancer.
DOI: 10.1093/carcin/16.6.1311
发表时间: 1995-06-01
期刊: CARCINOGENESIS
影响因子: 4.7
作者:
BOSLAND, MC;FORD, H;HORTON, L
通讯作者: HORTON, L
DOI: 10.1016/j.jsbmb.2009.10.015
发表时间: 2010-02-28
影响因子: 4.1
作者:
Ellem, Stuart J.;Risbridger, Gail P.
通讯作者: Risbridger, Gail P.
DOI: 10.1016/s0022-5347(17)37960-0
发表时间: 1991-09-01
期刊: JOURNAL OF UROLOGY
影响因子: 6.6
作者:
GINGRICH, JR;TUCKER, JA;WEBB, KS
通讯作者: WEBB, KS
DOI: 10.1021/tx960002q
发表时间: 1996-07-01
影响因子: 4.1
作者:
Stack, DE;Byun, J;Cavalieri, EL
通讯作者: Cavalieri, EL
DOI: 10.1093/jnci/80.13.1045
发表时间: 1988-09-07
影响因子: 10.3
作者:
LEAV, I;HO, SM;DAMASSA, D
通讯作者: DAMASSA, D