The long non-coding RNA HOTAIR promotes the proliferation of serous ovarian cancer cells through the regulation of cell cycle arrest and apoptosis
Authors: Ke-Qin Hua
Jing-Xin Ding
Jun-Jun Qiu
Gong Yang
Yan Wang
Hong-Yan Jin
Journal: Experimental Cell Research (2015)
Discipline: MOLECULAR BIOLOGY & GENETICS
Keywords: Apoptosis; Cell cycle; HOTAIR; Proliferation; Serous ovarian cancer.
Affiliations: Department of Gynecology, Obstetrics and Gynecology Hospital, Fudan University, 419 Fangxie Road, Shanghai 200011, China; Department of Obstetrics and Gynecology of Shanghai Medical College, Fudan University, 138 Yixueyuan Road, Shanghai 200032, China; Shanghai Key Laboratory of Female Reproductive Endocrine-Related Diseases, 413 Zhaozhou Road, Shanghai 200011, China., Cancer Institute, Fudan University Shanghai Cancer Center, 270 Dong׳an Road, Shanghai 200032, China; Department of Oncology, Shanghai Medical College, Fudan University, 130 Dong׳an Road, Shanghai 200032, China., Cancer Institute, Fudan University Shanghai Cancer Center, 270 Dong׳an Road, Shanghai 200032, China; Department of Oncology, Shanghai Medical College, Fudan University, 130 Dong׳an Road, Shanghai 200032, China. Electronic address: ., Department of Gynecology, Obstetrics and Gynecology Hospital, Fudan University, 419 Fangxie Road, Shanghai 200011, China; Department of Obstetrics and Gynecology of Shanghai Medical College, Fudan University, 138 Yixueyuan Road, Shanghai 200032, China; Shanghai Key Laboratory of Female Reproductive Endocrine-Related Diseases, 413 Zhaozhou Road, Shanghai 200011, China. Electronic address: .

Abstract:  HOX transcript antisense RNA (HOTAIR) is a well-known long non-coding RNA (lncRNA) whose dysregulation correlates with poor prognosis and malignant progression in many forms of cancer. Here, we investigate the expression pattern, clinical significance, and biological function of HOTAIR in serous ovarian cancer (SOC). Clinically, we found that HOTAIR levels were overexpressed in SOC tissues compared with normal controls and that HOTAIR overexpression was correlated with an advanced FIGO stage and a high histological grade. Multivariate analysis revealed that HOTAIR is an independent prognostic factor for predicting overall survival in SOC patients. We demonstrated that HOTAIR silencing inhibited A2780 and OVCA429 SOC cell proliferation in vitro and that the anti-proliferative effects of HOTAIR silencing also occurred in vivo. Further investigation into the mechanisms responsible for the growth inhibitory effects by HOTAIR silencing revealed that its knockdown resulted in the induction of cell cycle arrest and apoptosis through certain cell cycle-related and apoptosis-related proteins. Together, these results highlight a critical role of HOTAIR in SOC cell proliferation and contribute to a better understanding of the importance of dysregulated lncRNAs in SOC progression. 

Retracted: No

PubPeer comments:
 In Figure 4B, two flow cytometry dot plots are too similar. ![file] , 
 #1 I agree with your observation. It is quite clear that there are repeated groups of elements. I enhanced the images and highlight below the NW and NE quadrants to illustrate the issue. *** ![file] , 
 The authors regret the careless confusion of the representative figures in Fig. 4B. Following is the corrected version. It doesn t affect the results or conclusions of the figure and the article. The authors would like to apologise for any inconvenience caused. ![file] ,