Long Non-Coding RNA SPRY4-IT1 Can Predict Poor Prognosis in Digestive System Malignancies: a Meta-Analysis

Recent studies have reported that long non-coding RNA SPRY4 intron transcript 1 (SPRY4-IT1) is abnormally expressed in malignant digestive tumors and associated with prognosis. But its clinical relevance is unclear. Here, we performed a meta-analysis aims to evaluate the prognostic value of SPRY4-IT1 in digestive system malignancies. We systematic search the PubMed, Web of Science, ScienceDirect and Wiley Online Library database to eligible studies. The pooled hazard ratios (HRs) with a 95% confidence interval (95% CI) were calculated to explored the association of lncRNA SPRY4-IT1 with prognosis. Five studies were eligible for analysis, a total of 518 patients were included. Meta-analysis indicated that overexpression of SPRY4-IT1 was associated with poor over survival (OS) (HR = 1.24, 95%CI:0.49–1.98; random-effects model). The clinicopathological parameters analysis further showed that increased expression level of SPRY4-IT1 was positively correlated with lymph node metastasis (HR = 1.45, 95% CI =0.88–2.02; fixed-effects model), TNM stage (HR = 1.24,95% CI = 0.78–1.70; fixed-effects model), and invasion depth (HR = 1.25,95% CI = 0.63–1.88; fixed-effects model). lncRNA SPRY4-IT1 may serve as a potential prognostic marker in malignant digestive tumors.