Role of microRNA-296-3p in the malignant transformation of sinonasal inverted papilloma

被引：18

作者：

Kakizaki, Tomohiko ^{[1
]}

Hatakeyama, Hiromitsu ^{[1
]}

Nakamaru, Yuji ^{[1
]}

Takagi, Dai ^{[1
]}

Mizumachi, Takatsugu ^{[1
]}

Sakashita, Tomohiro ^{[1
]}

Kano, Satoshi ^{[1
]}

Homma, Akihiro ^{[1
]}

Fukuda, Satoshi ^{[1
]}

机构：

[1] Hokkaido Univ, Dept Otolaryngol Head & Neck Surg, Grad Sch Med, Sapporo, Hokkaido 0608638, Japan

来源：

ONCOLOGY LETTERS | 2017年 / 14卷 / 01期

关键词：

sinonasal inverted papilloma; microRNA; 296-3p; malignant transformation; phosphatase and tensin homolog; SQUAMOUS-CELL CARCINOMA; HEAD; EXPRESSION; CANCER; SURVIVAL; CONTRIBUTES; METASTASIS; PATTERNS; EVASION; MIR-296;

D O I：

10.3892/ol.2017.6193

中图分类号：

R73 [肿瘤学];

学科分类号：

100214 ;

摘要：

Inverted papilloma (IP) is a benign tumor occurring in the nasal cavity and paranasal sinuses. It is reported that 5-15% of IPs undergo malignant transformation into squamous cell carcinoma (SCC), and the role of microRNAs (miRNA/miR) in this process remains to be elucidated. In the present study, whole miRNA profiles using samples of IP and SCC were investigated, in order to detect the function of miRNA in the carcinogenesis of IP. Samples from IPs (n=5) and SCC lesions (n=5), which arose from IPs, were used for miRNA analysis. A total of 200 miRNAs exhibited a > 2-fold differential expression between IP and SCC. miR-296-3p was markedly upregulated in SCC with a 23-fold difference. Computational analysis indicated that miR-296-3p targeted PTEN, which regulates the phosphoinositide 3-kinase (PI3K)/protein kinase B (Akt) signaling pathway and PTEN is involved in the carcinogenesis of SCC. miR-296-3p directly regulated PTEN expression in head and neck cancer cells, with PTEN protein levels decreased in 4/19 the SCCs (21.0%), as compared with those in the IPs (76.4%). Positive p21 staining was observed in 64.7% of IPs; this was a significantly increased rate compared with that for SCCs (26.3%, P=0.0086). The results of the present study indicated that there were marked changes in the miRNA expression signature during the malignant transition. miR-296-3p may serve an important role in the malignant transformation of IPs via the regulation of PTEN, combined with the subsequent inhibition of the PI3K/Akt signaling pathway, and may be a novel agent for cancer prevention.

引用

页码：987 / 992

页数：6

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