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2014 ; 2
(4
): 490-494
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Effect of benazepril on the transdifferentiation of renal tubular epithelial
cells from diabetic rats
#MMPMID24944793
Peng T
; Wang J
; Zhen J
; Hu Z
; Yang X
Biomed Rep
2014[Jul]; 2
(4
): 490-494
PMID24944793
show ga
The aim of this study was to investigate the effect of benazepril on the
transdifferentiation of renal tubular epithelial cells from diabetic rats. Thirty
male Sprague-Dawley rats were included in the present study. Eight of the 30 rats
were randomly selected and served as the normal control group (N group), while
the remaining 22 rats, injected with streptozotocin (STZ), comprised the diabetic
rat model. Rats with diabetes were randomly divided into the diabetic (DM group)
and benazepril (B group) groups. The total course was conducted over 12 weeks.
Blood glucose, body weight, kidney/body weight, 24-h urinary protein, serum
creatinine and blood urea nitrogen were measured at the start and end of the
study. We observed the tubulointerstitial pathological changes, and applied
immunohistochemistry and western blotting to detect the expression of ?-smooth
muscle actin (?-SMA) in renal tissue. The levels of blood glucose, kidney/body
weight, 24-h urinary protein, serum creatinine, blood urea nitrogen and
tubulointerstitial damage index (TII) in the DM group were significantly higher
than that in the N group (p<0.01). Except for blood glucose and kidney/body
weight, the remaining indices were lower in the B group compared with those in
the DM group (p<0.01). Immunohistochemical staining results revealed the
expression of ?-SMA in renal tubular epithelial cells to be significantly higher
in the DM and B groups compared with the control (N) group (p<0.01). Western blot
analysis revealed that the expression of ?-SMA in diabetic renal tissue increased
3.27-fold compared with that of the N group, while the expression of ?-SMA in the
B group decreased 45% compared with that in the DM group. In conclusion,
benazepril significantly reduced the expression of ?-SMA in renal tubular
epithelial cells obtained from diabetic rats, inhibited the transdifferentiation
of renal tubular epithelial cells and played an important role in kidney
protection.