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A functional variant rs353292 in the flanking region of miR-143/145 contributes to the risk of colorectal cancer

机译:miR-143 / 145侧翼区域的功能性变体rs353292会增加结直肠癌的风险

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摘要

MicroRNA (miR)-143 and miR-145 have been identified as molecular regulators in cell proliferation, cell growth, clone formation, apoptosis, cell cycle, invasion, and migration. We previously found that rs353292 in the flanking region of miR-143/145 showed a high frequency in patients with colorectal cancer (CRC). To identify whether the rs353292 polymorphism is a risk factor for CRC, we conducted this study with larger samples. A total of 809 patients with CRC and 1005 gender matched controls were collected. The rs353292 polymorphism was genotyped by using TaqMan allelic discrimination. Dual luciferase reporter assay was carried out to measure the transcriptional activity. We found that the rs353292 polymorphism was associated with an increased risk for developing CRC in heterozygous comparison (adjusted OR = 1.70, 95% CI, 1.32–2.20, P < 0.001), dominant genetic model (adjusted OR = 1.62, 95% CI, 1.26–2.09, P < 0.001), and allele comparison (adjusted OR = 1.46, 95% CI, 1.16–1.84, P = 0.001). The rs353292 CT/TT carriers exhibited a lower expression of miR-143 compared to the CC carriers (P = 0.04). Moreover, the pGL3-rs353292T displayed a significantly lower luciferase activity than pGL3-rs353292C (P < 0.01). These findings indicate that the rs353292 polymorphism is functional and may be a risk factor for the development of CRC.
机译:MicroRNA(miR)-143和miR-145已被确定为细胞增殖,细胞生长,克隆形成,凋亡,细胞周期,侵袭和迁移的分子调节剂。我们先前发现miR-143 / 145侧翼区域中的rs353292在结直肠癌(CRC)患者中显示高频率。为了确定rs353292多态性是否是CRC的危险因素,我们对较大样本进行了这项研究。总共收集了809例CRC患者和1005例性别匹配的对照。使用TaqMan等位基因鉴别对rs353292多态性进行基因分型。进行双重荧光素酶报告基因测定以测量转录活性。我们发现,在杂合性比较中,rs353292多态性与CRC发生风险增加相关(校正OR = 1.70,95%CI,1.32-2.20,P <0.001),优势遗传模型(校正OR = 1.62,95%CI, 1.26–2.09,P <0.001)和等位基因比较(校正OR = 1.46,95%CI,1.16-1.84,P = 0.001)。与CC载体相比,rs353292 CT / TT载体显示出较低的miR-143表达(P = 0.04)。此外,pGL3-rs353292T的荧光素酶活性明显低于pGL3-rs353292C(P 0.01)。这些发现表明rs353292多态性是功能性的,可能是CRC发生的危险因素。

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