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Identification of Potential Prognostic Long Non-Coding RNA Biomarkers for Predicting Recurrence in Patients with Cervical Cancer

Authors Zhang Y, Zhang X, Zhu H, Liu Y, Cao J, Li D, Ding B, Yan W, Jin H, Wang S

Received 20 September 2019

Accepted for publication 19 December 2019

Published 31 January 2020 Volume 2020:12 Pages 719—730


Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 4

Editor who approved publication: Dr Seema Singh

Yan Zhang,1 Xing Zhang,1 Haixia Zhu,2 Yang Liu,3 Jian Cao,3 Dake Li,3 Bo Ding,4 Wenjing Yan,1 Hua Jin,2,* Shizhi Wang1,*

1Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, People’s Republic of China; 2Clinical Laboratory, Affiliated Tumor Hospital of Nantong University (Nantong Tumor Hospital), Nantong, People’s Republic of China; 3Department of Gynecology, Women’s Hospital of Nanjing Medical University, Nanjing Maternity and Child Health Care Hospital, Nanjing, People’s Republic of China; 4Department of Gynecology and Obstetrics, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, People’s Republic of China

*These authors contributed equally to this work

Correspondence: Shizhi Wang
Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, 87 Dingjiaqiao, Gulou District, Nanjing 210009, People’s Republic of China
Tel +86 25 83272566
Fax +86 25 83324322
Hua Jin
Clinical Laboratory, Affiliated Tumor Hospital of Nantong University (Nantong Tumor Hospital), No. 30, North Tongyang Road, Tongzhou District, Nantong 226361, People’s Republic of China
Tel +86 513 89002658
Fax +86 513 85169100

Background: Cervical cancer (CC) is one of the most common malignant tumors in women, and its treatment is often accompanied by high recurrence. We aimed to identify the long non-coding RNAs (lncRNAs) associated with CC recurrence.
Methods: We downloaded lncRNAs expression data of CC patients from The Cancer Genome Atlas (TCGA) dataset and used Cox regression models to analyze the lncRNAs relationship with CC recurrence. The significantly associated lncRNAs were utilized to construct a recurrence risk score (RRS) model. Bioinformatics analyses were used to assess the potential role of the critical lncRNAs in CC recurrence. The effect of critical lncRNAs on CC phenotype was determined by in vitro experiments.
Results: Using Cox regression analysis, four lncRNAs, ie, HCG11, CASC15, LINC00189, and LINC00905, were markedly associated with worse recurrence-free survival (RFS) of CC, whereas three lncRNAs, including HULC, LINC00173, and MIR22HG, were the opposite. After constructing the RRS model, Kaplan-Meier analysis revealed that patients with high RRS had significantly increased risk of recurrence. Among the 20 types of tumors in the TCGA database which all had adjacent normal tissues, MIR22HG and HCG11were significantly downregulated in 18 and 10 types of tumors including CC, respectively. Increased MIR22HG was significantly relevant to decreased risks of recurrence among the subgroups of age at diagnosis < 45 (Hazard Ratio (HR) = 0.26), stage I/II (HR = 0.33), T stage I/II (HR = 0.30), chemotherapy (HR = 0.18), and molecular therapy (HR = 0.16). Functionally, elevated MIR22HG expression could suppress CC cell proliferation, migration and invasion.
Conclusion: MIR22HG has a fundamental role in CC recurrence and could be served as a potential prognostic biomarker.

Keywords: TCGA, lncRNAs, cervical cancer, recurrence, biomarker

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