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2016 ; 17
(1
): 133
Nephropedia Template TP
gab.com Text
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English Wikipedia
Relationship of clusterin with renal inflammation and fibrosis after the recovery
phase of ischemia-reperfusion injury
#MMPMID27649757
Guo J
; Guan Q
; Liu X
; Wang H
; Gleave ME
; Nguan CY
; Du C
BMC Nephrol
2016[Sep]; 17
(1
): 133
PMID27649757
show ga
BACKGROUND: Long-term outcomes after acute kidney injury (AKI) include
incremental loss of function and progression towards chronic kidney disease
(CKD); however, the pathogenesis of AKI to CKD remains largely unknown. Clusterin
(CLU) is a chaperone-like protein that reduces ischemia-reperfusion injury (IRI)
and enhances tissue repair after IRI in the kidney. This study investigated the
role of CLU in the transition of IRI to renal fibrosis. METHODS: IRI was induced
in the left kidneys of wild type (WT) C57BL/6J (B6) versus CLU knockout (KO) B6
mice by clamping the renal pedicles for 28 min at the body temperature of 32 °C.
Tissue damage was examined by histology, infiltrate phenotypes by flow cytometry
analysis, and fibrosis-related gene expression by PCR array. RESULTS: Reduction
of kidney weight was induced by IRI, but was not affected by CLU KO. Both WT and
KO kidneys had similar function with minimal cellular infiltration and fibrosis
at day 14 of reperfusion. After 30 days, KO kidneys had greater loss in function
than WT, indicated by the higher levels of both serum creatinine and BUN in KO
mice, and exhibited more cellular infiltration (CD8 cells and macrophages), more
tubular damage and more severe tissue fibrosis (glomerulopathy, interstitial
fibrosis and vascular fibrosis). PCR array showed the association of CLU
deficiency with up-regulation of CCL12, Col3a1, MMP9 and TIMP1 and
down-regulation of EGF in these kidneys. CONCLUSION: Our data suggest that CLU
deficiency worsens renal inflammation and tissue fibrosis after IRI in the
kidney, which may be mediated through multiple pathways.