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2016 ; 14
(5
): 4124-4134
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Mechanism of tacrolimus-induced chronic renal fibrosis following transplantation
is regulated by ox-LDL and its receptor, LOX-1
#MMPMID27633115
Deng S
; Jin T
; Zhang L
; Bu H
; Zhang P
Mol Med Rep
2016[Nov]; 14
(5
): 4124-4134
PMID27633115
show ga
Chronic renal allograft dysfunction (CRAD) is the most common cause of graft
failure following renal transplantation. However, the underlying mechanisms
remain to be fully elucidated. Immunosuppressants and hyperlipidemia are
associated with renal fibrosis following long?term use. The present study aimed
to determine the effects of tacrolimus (FK506) and lipid metabolism disorder on
CRAD. In vitro and in vivo models were used for this investigation. Cells of the
mouse proximal renal tubular epithelial cell strain, NRK?52E, were cultured
either with oxidized low?density lipoprotein (ox?LDL), FK506, ox?LDL combined
with FK506, or vehicle, respectively. Changes in cell morphology and changes in
the levels of lectin?like ox?LDL receptor?1 (LOX?1), reactive oxygen species
(ROS), hydrogen peroxide and fibrosis?associated genes were evaluated at 24, 48
and 72 h. In separate experiment, total of 60 Sprague?Dawley rats were divided
randomly into four groups, which included a high?fat group, FK506 group, high?fat
combined with FK506 group, and control group. After 2, 4 and 8 weeks, the serum
lipid levels, the levels of ox?LDL, ROS, and the expression levels of
transforming growth factor (TGF)??1 and connective tissue growth factor were
determined. The in vitro and in vivo models revealed that lipid metabolism
disorder and FK506 caused oxidative stress and a fibrogenic response. In
addition, decreased levels of LOX?1 markedly reduced the levels of TGF??1 in the
in vitro model. Taken together, FK506 and dyslipidemia were found to be
associated with CRAD following transplantation.