title: Increased serum 2-oxoglutarate associated with high myocardial energy expenditure and poor prognosis in chronic heart failure patients.
abstract: Myocardial energy expenditure (MEE) and 2-oxoglutarate are elevated in chronic heart failure (CHF) patients compared with healthy controls. To explore whether 2-oxoglutarate could reflect the levels of MEE and predict the prognosis of CHF, 219 CHF patients and 66 healthy controls were enrolled. 2-Oxoglutarate was assayed with Liquid Chromatography-Mass Spectrometry/Mass Spectrometry (LC/MS/MS). CHF patients were divided into 4 groups according to interquartile range of MEE and followed for death or recurrent hospital admission due to CHF for the mean follow-up time 6.64±0.16months. 2-Oxoglutarate was increased in CHF patients compared with controls (P<0.01) and correlated with estimated glomerular filtration rate (r=0.142, P=0.036), age (r=-0.269, P<0.01) and MEE levels (r=0.307, P<0.01) in a multiple linear correlation analysis in CHF patients. Furthermore, 2-oxoglutarate (OR=3.470, 95% CI=1.557 to 7.730, P=0.002), N-terminal pro-B-type natriuretic peptide (OR=4.013, 95% CI=1.553 to 10.365, P=0.004), age (OR=1.611, 95% CI=1.136 to 2.283, P=0.007) and left ventricular ejection fraction (OR=7.272, 95% CI=3.110 to 17.000, P<0.001) were independently associated with MEE on multiple logistic regression analysis. Kaplan-Meier event curves showed that high 2-oxoglutarate levels were associated with adverse outcomes (Log Rank, Chi(2)=4.026, P=0.045). This study showed that serum 2-oxoglutarate is associated with MEE levels, which can be used as potential biomarkers for MEE, and it can reflect the clinical severity and short-term outcome of CHF.
authors: State Key Laboratory of Organ Failure Research, Department of Cardiology, Nanfang Hospital, Southern Medical University, Guangzhou, China; Department of Cardiology, Nanfang Hospital, Southern Medical University, Guangzhou, China; Key Laboratory For Organ Failure Research, Ministry of Education of the People's Republic of China, Guangzhou, China.
authors: Ping-An
authors: PA
authors: Chen
authors: Department of Cardiology, Nanfang Hospital, Southern Medical University, Guangzhou, China.
authors: Zhi-Hao
authors: ZH
authors: Xu
authors: Department of Cardiology, Nanfang Hospital, Southern Medical University, Guangzhou, China.
authors: Yu-Li
authors: YL
authors: Huang
authors: Department of Cardiology, Guangzhou First People's Hospital, Guangzhou, China.
authors: Yi
authors: Y
authors: Luo
authors: Department of Cardiology, Nanfang Hospital, Southern Medical University, Guangzhou, China.
authors: Ding-Ji
authors: DJ
authors: Zhu
authors: Department of Cardiology, Nanfang Hospital, Southern Medical University, Guangzhou, China.
authors: Peng
authors: P
authors: Wang
authors: Department of Cardiology, General Hospital of Guangzhou Military Command, Guangzhou, China.
authors: Zhi-Yong
authors: ZY
authors: Du
authors: Department of Cardiology, Guangzhou First People's Hospital, Guangzhou, China.
authors: Yang
authors: Y
authors: Yang
authors: Ultrasonic Department, Guangzhou First People's Hospital, Guangzhou, China.
authors: Dai-Hong
authors: DH
authors: Wu
authors: State Key Laboratory of Organ Failure Research, Department of Cardiology, Nanfang Hospital, Southern Medical University, Guangzhou, China; Department of Cardiology, Nanfang Hospital, Southern Medical University, Guangzhou, China; Key Laboratory For Organ Failure Research, Ministry of Education of the People's Republic of China, Guangzhou, China.
authors: Wen-Yan
authors: WY
authors: Lai
authors: Key Laboratory For Organ Failure Research, Ministry of Education of the People's Republic of China, Guangzhou, China; Department of Rheumatology, Nanfang Hospital, Southern Medical University, Guangzhou, China. Electronic address: renhao67@aliyun.com.
authors: Hao
authors: H
authors: Ren
authors: State Key Laboratory of Organ Failure Research, Department of Cardiology, Nanfang Hospital, Southern Medical University, Guangzhou, China; Department of Cardiology, Nanfang Hospital, Southern Medical University, Guangzhou, China; Key Laboratory For Organ Failure Research, Ministry of Education of the People's Republic of China, Guangzhou, China. Electronic address: dinglixu@fimmu.com.
authors: Ding-Li
authors: DL
authors: Xu
keywords: 2-Oxoglutarate; Biomarker; Heart failure; Myocardial energy expenditure