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2017 ; 15
(3
): 1229-1235
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Urinary kidney injury molecule?1 as an early diagnostic biomarker of obstructive
acute kidney injury and development of a rapid detection method
#MMPMID28075469
Jin Y
; Shao X
; Sun B
; Miao C
; Li Z
; Shi Y
Mol Med Rep
2017[Mar]; 15
(3
): 1229-1235
PMID28075469
show ga
The aim of the present study was to investigate whether urinary kidney injury
molecule?1 (KIM?1) presents a suitable early diagnostic biomarker of obstructive
nephropathy?induced acute kidney injury (AKI), and to develop a rapid detection
method for urinary KIM?1. Obstructive AKI was induced in an experimental rat
model by a unilateral ureteral obstruction (UUO) operation. Macro? and
micromorphological kidney alterations were determined by visual observation and
hematoxylin and eosin (HE) staining, respectively. Kidney functions were
evaluated by detecting urea nitrogen and creatinine levels in rat urine and
blood. Urinary KIM?1 levels were measured using an enzyme?linked immunosorbent
assay, and the protein expression levels of KIM?1, ??smooth muscle actin (??SMA)
and vimentin in kidney tissues were detected using immunohistochemical assays. In
order to measure KIM?1 levels, colloidal gold immunochromatographic strips were
developed based on the colloidal gold immunochromatographic assay. The results
indicated that KIM?1 levels were significantly higher in the UUO group when
compared with the Sham group. KIM?1 levels in the urine and kidney tissues
exhibited a time?dependent increase, together with increasing obstructive AKI in
the UUO group. In addition, KIM?1 levels were demonstrated to be a more sensitive
biomarker of early obstructive AKI, when compared with ??SMA and vimentin. A
colloidal gold?based immunochromatographic strip was developed, whereby the
detection of urinary KIM?1 could be completed within 5?10 min. In conclusion,
results of the present study demonstrated that urinary KIM?1 may be a valuable
biomarker for the early diagnosis of obstructive AKI, and the use of a colloidal
gold immunochromatographic strip may be a promising method for the rapid
detection of urinary KIM?1.