miR-145-5p Suppresses Tumor Cell Migration, Invasion and Epithelial to Mesenchymal Transition by Regulating the Sp1/NF-κB Signaling Pathway in Esophageal Squamous Cell Carcinoma.

miR-145-5p Suppresses Tumor Cell Migration, Invasion and Epithelial to Mesenchymal Transition by Regulating the Sp1/NF-κB Signaling Pathway in Esophageal Squamous Cell Carcinoma.
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miR-145-5p通过调节食管鳞状细胞癌中的Sp1/NF-B信号通路抑制肿瘤细胞迁移、侵袭和上皮间质转化

DOI:
10.3390/ijms18091833
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发表时间:
2017-08-23
影响因子:
5.6
通讯作者:
Shi ZZ
Shi ZZ
中科院分区:
生物学2区
文献类型:
--
作者:
Mei LL;Wang WJ;Qiu YT;Xie XF;Bai J;Shi ZZ

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microRNAs(miRNAs)在人类肿瘤的发生、发展过程中起着重要作用。尽管已有研究表明miR-145- 5 p在食管鳞状细胞癌(ESCC)中表达下调,但其在ESCC中的作用和机制尚不清楚。我们使用microRNA微阵列和基因表达综合数据集(GEO),证实miR-145- 5 p在ESCC组织中下调。体外实验表明,异位miR-145- 5 p表达抑制细胞增殖、迁移、侵袭和上皮间质转化(EMT)。miR-145- 5 p还降低了细胞周期基因的表达,包括细胞周期蛋白A2(CCNA 2),细胞周期蛋白D1(CCND 1)和细胞周期蛋白E1(CCNE 1),EMT相关转录因子Slug,以及基质金属蛋白酶(MMP),包括MMP 2,MMP 7和MMP 13。此外,miR-145- 5 p模拟物在mRNA和蛋白质水平上降低了候选靶基因特异性蛋白1(Sp1)和核因子κ B(NF-κB)(p65)。Sp1的敲除表型模拟了miR-145- 5 p过表达对细胞周期调节因子、EMT和NF-κB(p65)表达的影响。重要的是,NF-κB信号通路的抑制或NF-κB(p65)的敲低表型模拟了miR-145- 5 p对ESCC细胞的迁移、侵袭和EMT的影响。结论:miR-145- 5 p通过调控Sp1/NF-κB信号通路,抑制食管癌细胞的迁移、侵袭和EMT,从而发挥抑瘤作用。
MicroRNAs (miRNAs) play important roles in the progression of human cancer. Although previous reports have shown that miR-145-5p is down-regulated in esophageal squamous cell carcinoma (ESCC), the roles and mechanisms of down-regulation of miR-145-5p in ESCC are still largely unknown. Using microRNA microarray and Gene Expression Omnibus (GEO) datasets, we confirmed that miR-145-5p was down-regulated in ESCC tissues. In vitro assays revealed that ectopic miR-145-5p expression repressed cell proliferation, migration, invasion and epithelial to mesenchymal transition (EMT). miR-145-5p also reduced the expressions of cell cycle genes including cyclin A2 (CCNA2), cyclin D1 (CCND1) and cyclin E1 (CCNE1), the EMT-associated transcription factor Slug, and matrix metalloproteinases (MMPs) including MMP2, MMP7 and MMP13. Furthermore, miR-145-5p mimics reduced candidate target gene specificity protein 1 (Sp1) and nuclear factor κ B (NF-κB) (p65) both in mRNA and protein levels. Knockdown of Sp1 phenocopied the effects of miR-145-5p overexpression on cell cycle regulators, EMT and the expression of NF-κB (p65). Importantly, inhibition of the NF-κB signaling pathway or knockdown of NF-κB (p65) phenocopied the effects of miR-145-5p on the migration, invasion and EMT of ESCC cells. In conclusion, our results suggested that miR-145-5p plays tumor-suppressive roles by inhibiting esophageal cancer cell migration, invasion and EMT through regulating the Sp1/NF-κB signaling pathway.
DOI: 10.12659/msm.897663
发表时间: 2016-10-23
期刊: Medical science monitor : international medical journal of experimental and clinical research
影响因子: --
作者:
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