lncRNA ROR and miR-125b Predict the Prognosis in Heart Failure Combined Acute Renal Failure

Abstract

Objective. To elucidate the correlation between expression levels of long noncoding RNA (lncRNA) ROR and microRNA-125b (miR-125b) with the prognosis in heart failure (HF) patients combined acute renal failure (ARF). Methods. HF patients combined ARF ( $n=90$ ) and healthy controls ( $n=90$ ) in the same period were included in our hospital from April 2016 to December 2018. Every subject was followed up for 24 months. Serum levels of lncRNA ROR and miR-125b were detected, and their expression correlation was analyzed by Pearson correlation test. Receiver operating characteristic (ROC) curves were depicted for assessing the sensitivity and specificity of lncRNA ROR and miR-125b in diagnosing HF combined ARF. Results. lncRNA ROR was upregulated in serum of HF patients combined ARF, and its level was positively correlated to NYHA classification. miR-125b displayed an opposite trend. In serum samples of HF combined ARF, expression level of lncRNA ROR was negatively related to that of miR-125b. Diagnostic potentials of lncRNA ROR and miR-125b in HF combined ARF were confirmed by ROC curve analyses (lncRNA ROR: $\text{AUC}=0.9199$ , $\text{cutoff}\text{value}=5.595$ , $\text{sensitivity}=92.22\%$ , and $\text{specificity}=73.33\%$ ; miR-125b: $\text{AUC}=0.8509$ , $\text{cutoff}\text{value}=2.290$ , $\text{sensitivity}=81.11\%$ , and $\text{specificity}=74.44\%$ ). After 2-year follow-up, 16 cases were dead. Higher incidences of death and rehospitalization were observed in HF combined ARF cases expressing higher serum level of lncRNA ROR or lower level of miR-125b. Conclusions. Serum level of lncRNA ROR is upregulated, and miR-125b is downregulated in HF patients combined ARF. Their levels are linked to NYHA classification, which can be utilized as prognostic biomarkers in HF combined ARF.