Abstract
Patients with heart failure with preserved ejection fraction (HFPEF) account for ~50% of all cases of heart failure and their clinical prognosis is poor. The present study attempted to investigate the diagnostic value of circulating long non-coding RNA taurine upregulated gene 1 (TUG1) for HFPEF in subjects with hypertension. Between January 2017 and January 2019, 80 aged/elderly hypertensive patients with or without HFPEF were recruited for the present study. The concentration of N-terminal pro-brain natriuretic peptide (NT-proBNP) in the serum was measured using ELISA and TUG1 expression levels were determined using reverse transcription-quantitative PCR. Echocardiography was used for the determination of cardiac function. The results indicated that the levels of NT-proBNP and TUG1 were increased in the serum of hypertensive patients with HFPEF. Pearson analysis demonstrated that NT-proBNP and TUG1 were positively correlated with the left atrial diameter and negatively correlated with the ratio of the peak flow velocity in the early diastolic phase to the peak flow velocity in the late diastolic phase. In addition, a positive correlation was confirmed between TUG1 and NT-proBNP levels. Receiver operating characteristic curve analysis demonstrated that TUG1 and NT-proBNP were useful biomarkers for the diagnosis of HFPEF. In conclusion, it was observed that NT-proBNP and TUG1 were increased in the serum of hypertensive patients with HFPEF. Furthermore, TUG1 and NT-proBNP were indicated to be useful plasma biomarkers for the diagnosis of HFPEF.