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2016 ; 6
(ä): 27945
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Urinary miR-16 transactivated by C/EBP? reduces kidney function after
ischemia/reperfusion-induced injury
#MMPMID27297958
Chen HH
; Lan YF
; Li HF
; Cheng CF
; Lai PF
; Li WH
; Lin H
Sci Rep
2016[Jun]; 6
(ä): 27945
PMID27297958
show ga
Ischemia-reperfusion (I/R) induced acute kidney injury (AKI) is regulated by
transcriptional factors and microRNAs (miRs). However, modulation of miRs by
transcriptional factors has not been characterized in AKI. Here, we found that
urinary miR-16 was 100-fold higher in AKI patients. MiR-16 was detected earlier
than creatinine in mouse after I/R. Using TargetScan, the 3'UTR of B-cell
lymphoma 2 (BCL-2) was found complementary to miR-16 to decrease the fluorescent
reporter activity. Overexpression of miR-16 in mice significantly attenuated
renal function and increased TUNEL activity in epithelium tubule cells. The CCAAT
enhancer binding protein beta (C/EBP-?) increased the expression of miR-16 after
I/R injury. The ChIP and luciferase promoter assay indicated that about -1.0?kb
to -0.5?kb upstream of miR-16 genome promoter region containing C/EBP-? binding
motif transcriptionally regulated miR-16 expression. Meanwhile, the level of
pri-miR-16 was higher in mice infected with lentivirus containing C/EBP-?
compared with wild-type (WT) mice and overexpression of C/EBP-? in the kidney of
WT mice reduced kidney function, increased kidney apoptosis, and elevated urinary
miR-16 level. Our results indicated that miR-16 was transactivated by C/EBP-?
resulting in aggravated I/R induced AKI and that urinary miR-16 may serve as a
potential biomarker for AKI.