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Anti-high mobility group box-1 (HMGB1) antibody attenuates kidney damage
following experimental crush injury and the possible role of the tumor necrosis
factor-? and c-Jun N-terminal kinase pathway
#MMPMID28701229
Zhang BF
; Wang PF
; Cong YX
; Lei JL
; Wang H
; Huang H
; Han S
; Zhuang Y
J Orthop Surg Res
2017[Jul]; 12
(1
): 110
PMID28701229
show ga
BACKGROUND: Inflammation plays a crucial role in kidney damage after crush
syndrome (CS). Several researchers report that high mobility group box-1 protein
(HMGB1) may be the vital trigger in kidney damage, and tumor necrosis factor-?
(TNF-?) and c-Jun N-terminal kinase (JNK) are involve in this pathophysiological
process, but their biological roles are unclear. This study aimed to explore the
relationship between HMGB1, JNK, and TNF-? in kidney damage. METHODS: The crush
injury model was established using weight compression. The reliability of the
crush injury model was determined by hematoxylin-eosin (HE) staining. Western
blot was used to detect the expression of HMGB1, JNK, and TNF-?, and TUNEL was
used to mark apoptotic cells in the renal cortex. RESULTS: The results showed
that the highest expression of HMGB1 in muscle was 12 h after CS. JNK and TNF-?
increased and peaked at 1 day after CS in kidneys. Western blot analysis revealed
that anti-HMGB1 antibody could downregulate the expression of JNK and TNF-?.
Anti-TNF-? could downregulate activation of JNK, and SP600125 could downregulate
expression of TNF-? in the kidneys. In addition, anti-HMGB1 antibody, anti-TNF-?
antibody, and SP600125 could reduce cellular apoptosis in the renal cortex.
CONCLUSIONS: It is possible that JNK and TNF-? commonly contribute to kidney
damage by assembling a positive feedback cycle after CS, leading to increased
apoptosis in the renal cortex. HMGB1 from the muscle may be the trigger.