Prognostic Impact of lncRNA MCM3AP-AS1 Expression in Malignant Solid Tumors: A Systematic Review and Meta-analysis
Abstract Objectives: MCM3AP-AS1 is a newly discovered long non-coding RNA that functions as a biomarker in many different cancer types. However, the pooled role of lncRNA MCM3AP-AS1 in the prognosis of human cancers remains unclear. We performed a systematic review and meta-analysis to explore its potential prognosis for malignant tumors. Materials and methods: A literature survey was conducted by searching in the PubMed, Embase, Web of Science, China National Knowledge Infrastructure and Wanfang databases for studies published as of September 1, 2021. The pooled hazard ratio (HR) and 95% confidence interval (95% CI) were calculated to evaluate the relationship between MCM3AP-AS1 expression and overall survival (OS). The endpoints also included various clinical parameters. Results: A total of 14 studies containing 921 cancer patients were finally included into this meta-analysis. The results comprehensively showed that increased MCM3AP-AS1 expression was significantly correlated with poor overall survival (HR = 1.83, 95% CI: 1.56-2.14, P<0.00001). A subgroup meta-analysis for overall survival was conducted. Additionally, high level of lncRNA MCM3AP-AS1 was significantly associated with worse differentiation (OR = 1.76, 95 % CI: 1.12–2.75, P = 0.01), larger tumor size (OR = 2.70, 95 % CI: 1.13–6.46, P = 0.03), advanced clinical stage (OR = 2.52, 95 % CI: 1.32–4.81, P = 0.005) and lymph node metastasis (OR = 2.85, 95 % CI: 1.16–7.00, P = 0.02), respectively. Conclusions: LncRNA MCM3AP-AS1 might be a potential and unfavorable prognostic biomarker of cancer.