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2015 ; 12
(ä): 155
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Osthole confers neuroprotection against cortical stab wound injury and attenuates
secondary brain injury
#MMPMID26337552
Xia Y
; Kong L
; Yao Y
; Jiao Y
; Song J
; Tao Z
; You Z
; Yang J
J Neuroinflammation
2015[Sep]; 12
(ä): 155
PMID26337552
show ga
BACKGROUND: Neuroendoscopy is an innovative technique for neurosurgery that can
nonetheless result in traumatic brain injury. The accompanying neuroinflammation
may lead to secondary tissue damage, which is the major cause of delayed neuronal
death after surgery. The present study investigated the capacity of osthole to
prevent secondary brain injury and the underlying mechanism of action in a mouse
model of stab wound injury. METHODS: A mouse model of cortical stab wound injury
was established by inserting a needle into the cerebral cortex for 20 min to
mimic neuroendoscopy. Mice received an intraperitoneal injection of osthole 30
min after surgery and continued for 14 days. Neurological severity was evaluated
12 h and up to 21 days after the trauma. Brains were collected 3-21 days
post-injury for histological analysis, immunocytochemistry, quantitative
real-time PCR, and terminal deoxynucleotidyl transferase dUTP nick end labeling
(TUNEL) and enzyme-linked immunosorbent assays. RESULTS: Neurological function
improved in mice treated with osthole and was accompanied by reduced brain water
content and accelerated wound closure relative to untreated mice. Osthole
treatment reduced the number of macrophages/microglia and peripheral infiltrating
of neutrophils and lowered the level of the proinflammatory cytokines
interleukin-6 and tumor necrosis factor ? in the lesioned cortex. Osthole-treated
mice had fewer TUNEL+ apoptotic neurons surrounding the lesion than controls,
indicating increased neuronal survival. CONCLUSIONS: Osthole reduced secondary
brain damage by suppressing inflammation and apoptosis in a mouse model of stab
wound injury. These results suggest a new strategy for promoting neuronal
survival and function after neurosurgery to improve long-term patient outcome.