NACC1, as a Target of MicroRNA-331-3p, Regulates Cell Proliferation in Urothelial Carcinoma Cells

被引:23
作者
Morita, Kohei [1 ]
Fujii, Tomomi [1 ]
Itami, Hiroe [1 ]
Uchiyama, Tomoko [1 ]
Nakai, Tokiko [1 ]
Hatakeyama, Kinta [1 ]
Sugimoto, Aya [1 ]
Miyake, Makito [2 ]
Nakai, Yasushi [2 ]
Tanaka, Nobumichi [2 ]
Shimada, Keiji [3 ]
Yamazaki, Masaharu [4 ]
Fujimoto, Kiyohide [2 ]
Ohbayashi, Chiho [1 ]
机构
[1] Nara Med Univ, Sch Med, Dept Diagnost Pathol, Nara 6348521, Japan
[2] Nara Med Univ, Sch Med, Dept Urol, Nara 6348521, Japan
[3] Nara City Hosp, Dept Diagnost Pathol, Nara 6348521, Japan
[4] Nara Med Univ Hosp, Dept Cent Clin Lab, Nara 6348521, Japan
来源
CANCERS | 2018年 / 10卷 / 10期
关键词
urothelial carcinoma; NACC1; miR-331-3p; cell cycle arrest; migration and invasion; ACCUMBENS-ASSOCIATED; 1; OVARIAN-CANCER; CERVICAL CARCINOMAS; PLURIPOTENCY FACTOR; TUMOR RECURRENCE; PROTEIN NAC-1; EXPRESSION; APOPTOSIS; CONTRIBUTES; PROGRESSION;
D O I
10.3390/cancers10100347
中图分类号
R73 [肿瘤学];
学科分类号
100214 ;
摘要
The nucleus accumbens-associated protein 1 (NACC1) is a transcription factor constitutively expressed in the urothelium, where it regulates cell growth, senescence, autophagy, and epithelial-mesenchymal transition. microRNA (miRNA) constitutes a class of small non-coding RNAs which are involved in cell proliferation, differentiation, and progression of tumors. miRNAs and their target molecules are utilized for molecular diagnosis of urothelial carcinoma. NACC1 is one of several putative target molecules of miR-331-3p, and is associated with cell proliferation in cancers such as prostate and cervical cancer. Functional experiments involving miR-331-3p and its target molecule NACC1 were conducted using the urothelial carcinoma (UC) cell lines, T24, UMUC6, and KU7. Furthermore, quantitative reverse transcription polymerase chain reaction and immunostaining were performed to evaluate the expression of NACC1 in UC derived from transurethral resection of bladder tumor (TUR-Bt) specimens. The methane thiosulfonate (MTS) assay revealed that cell proliferation was significantly reduced after transient transfection of miR-331-3p precursor and/or NACC1 siRNA in UC cells. Cell senescence via cell cycle arrest at the G1 phase was induced by NACC1 inhibition. On the other hand, suppression of NACC1 induced cell migration and invasion abilities. Immunohistochemical analysis of TUR-Bt specimens revealed that over 70% of UC cells presented strongly positive results for NACC1. In contrast, normal urothelial cells were weakly positive for NACC1. It was also found that NACC1 expression was lower in invasive UC cells than in non-invasive UC cells. Loss of NACC1 induced vessel invasion in invasive UC tissues. The present results indicate that NACC1 regulated by miR-331-3p contributes to cell proliferation, and is involved in cell migration and invasion. This suggests that NACC1 can serve as a potential target molecule for the prediction and prognosis of UC, and can contribute to effective treatment strategies.
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页数:14
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