title: Implications of dynamic changes in miR-192 expression in ischemic acute kidney injury.
abstract: OBJECTIVE
  Ischemia-reperfusion injury (IRI) is a major cause of acute kidney injury (AKI) with poor outcomes. While many important functions of microRNAs (miRNAs) have been identified in various diseases, few studies reported miRNAs in acute kidney IRI, especially the dynamic changes in their expression and their implications during disease progression.
  
  
  METHODS
  The expression of miR-192, a specific kidney-enriched miRNA, was assessed in both the plasma and kidney of IRI rats at different time points after kidney injury and compared to renal function and kidney histological changes. The results were validated in the plasma of the selected patients with AKI after cardiac surgery compared with those matched patients without AKI. The performance characteristics of miR-192 were summarized using area under the receiver operator characteristic (ROC) curves (AUC-ROC).
  
  
  RESULTS
  MiRNA profiling in plasma led to the identification of 42 differentially expressed miRNAs in the IRI group compared to the sham group. MiR-192 was kidney-enriched and chosen for further validation. Real-time PCR showed that miR-192 levels increased by fourfold in the plasma and decreased by about 40% in the kidney of IRI rats. Plasma miR-192 expression started increasing at 3 h and peaked at 12 h, while kidney miR-192 expression started decreasing at 6 h and remained at a low level for 7 days after reperfusion. Plasma miR-192 level in patients with AKI increased at the time of ICU admission, was stable for 2 h and decreased after 24 h. AUC-ROC was 0.673 (95% CI: 0.540-0.806, p = 0.014).
  
  
  CONCLUSIONS
  Plasma miR-192 expression was induced in a time-dependent manner after IRI in rats and patients with AKI after cardiac surgery, comparably to the kidney injury development and recovery process, and may be useful for the detection of AKI.
authors.affiliation: Department of Nephrology, Molecular Cell Lab for Kidney Disease, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, 160 Pujian Road, Shanghai, 200127, China.
authors.forename: Lulu
authors.initials: L
authors.lastname: Zhang
authors.affiliation: Department of Nephrology, Molecular Cell Lab for Kidney Disease, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, 160 Pujian Road, Shanghai, 200127, China.
authors.forename: Yuan
authors.initials: Y
authors.lastname: Xu
authors.affiliation: Department of Cardiac Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, 160 Pujian Road, Shanghai, 200127, China.
authors.forename: Song
authors.initials: S
authors.lastname: Xue
authors.affiliation: Department of Cardiac Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, 160 Pujian Road, Shanghai, 200127, China.
authors.forename: Xudong
authors.initials: X
authors.lastname: Wang
authors.affiliation: Department of Nephrology, Molecular Cell Lab for Kidney Disease, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, 160 Pujian Road, Shanghai, 200127, China.
authors.forename: Huili
authors.initials: H
authors.lastname: Dai
authors.affiliation: Department of Nephrology, Molecular Cell Lab for Kidney Disease, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, 160 Pujian Road, Shanghai, 200127, China.
authors.forename: Jiaqi
authors.initials: J
authors.lastname: Qian
authors.affiliation: Department of Nephrology, Molecular Cell Lab for Kidney Disease, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, 160 Pujian Road, Shanghai, 200127, China.
authors.forename: Zhaohui
authors.initials: Z
authors.lastname: Ni
authors.affiliation: Department of Nephrology, Molecular Cell Lab for Kidney Disease, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, 160 Pujian Road, Shanghai, 200127, China. yucheng.yan@163.com.
authors.forename: Yucheng
authors.initials: Y
authors.lastname: Yan
mesh_terms: D058186:Acute Kidney Injury / Q000097:blood* / Q000175:diagnosis / Q000209:etiology / Q000378:metabolism; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000818:Animals; D019540:Area Under Curve; D015415:Biomarkers / Q000097:blood; D001806:Blood Urea Nitrogen; D006348:Cardiac Surgical Procedures; D016022:Case-Control Studies; D003404:Creatinine / Q000097:blood; D005260:Female; D006801:Humans; D007668:Kidney / Q000378:metabolism*; D007684:Kidney Tubules / Q000473:pathology; D008297:Male; D035683:MicroRNAs / Q000097:blood* / Q000235:genetics / Q000378:metabolism; D008875:Middle Aged; D012372:ROC Curve; D051381:Rats; D017207:Rats, Sprague-Dawley; D015427:Reperfusion Injury / Q000097:blood* / Q000150:complications*
chemical_list: D015415:Biomarkers; C546783:MIRN192 microRNA, human; D035683:MicroRNAs; D003404:Creatinine
keywords: Acute kidney injury; Cardiac surgery; Ischemia–reperfusion injury; miR-192; microRNAs