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Long noncoding RNA NBAT-1 suppresses tumorigenesis and predicts favorable prognosis in ovarian cancer

Authors Yan CS, Jiang Y, Wan YC, Zhang L, Liu JH, Zhou SL, Cheng WJ

Received 14 October 2016

Accepted for publication 3 December 2016

Published 6 April 2017 Volume 2017:10 Pages 1993—2002


Checked for plagiarism Yes

Review by Single-blind

Peer reviewers approved by Dr Colin Mak

Peer reviewer comments 3

Editor who approved publication: Dr Samir Farghaly

Changsheng Yan,1 Yi Jiang,1 Yicong Wan,1 Lin Zhang,2 Jinhui Liu,1 Shulin Zhou,1 Wenjun Cheng1

1Department of Gynecology, The First Affiliated Hospital of Nanjing Medical University, 2Department of Obstetrics and Gynecology, Zhongda Hospital Affiliated to Southeast University, Medical School, Southeast University, Nanjing, Jiangsu, People’s Republic of China

Abstract: Long noncoding RNA (lncRNA) has been proven to be involved in many biological processes in ovarian cancer (OC). However, the mechanism still remains unknown. In this study, we screened significantly downregulated NBAT-1, which has been proven to play a significant role in breast cancer, clear cell renal cell carcinoma, and neuroblastoma, but not in OC, in two independent datasets with relatively more samples (GSE18520 and GSE38666) from Gene Expression Omnibus. We found that lncRNA NBAT-1 was obviously downregulated in OC tissue compared to normal ovarian tissue (P<0.001) which was free of OC, and the detected levels of NBAT-1 were associated with the International Federation of Gynecology and Obstetrics stage and tumor size guidelines. Moreover, it has been shown that lower levels of NBAT-1 predict poor outcomes of OC. In order to investigate the functional role of NBAT-1, pcDNA-NBAT-1 and empty vector were transfected into TOV112D and OVCAR-3 cell lines. Overexpressed NBAT-1 significantly inhibited cell proliferation, invasion, and migration in both TOV112D and OVCAR-3 cell lines. Finally, Western blot assay indicated that NBAT-1 may exert its function by targeting the ERK1/2 and AKT signaling pathways. In addition, tumor formation growth assay showed that overexpressed NBAT-1 significantly suppresses tumor growth in vivo. In conclusion, our study suggests that NBAT-1 acts as an anti-oncogene in the development of OC.

Keywords: ovarian cancer, lncRNA NBAT-1, tumorigenesis, prognosis

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