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2016 ; 17
(1
): 60
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Astaxanthin alleviates cerebral edema by modulating NKCC1 and AQP4 expression
after traumatic brain injury in mice
#MMPMID27581370
Zhang M
; Cui Z
; Cui H
; Cao Y
; Zhong C
; Wang Y
BMC Neurosci
2016[Aug]; 17
(1
): 60
PMID27581370
show ga
BACKGROUND: Astaxanthin is a carotenoid pigment that possesses potent
antioxidative, anti-inflammatory, antitumor, and immunomodulatory activities.
Previous studies have demonstrated that astaxanthin displays potential
neuroprotective properties for the treatment of central nervous system diseases,
such as ischemic brain injury and subarachnoid hemorrhage. This study explored
whether astaxanthin is neuroprotective and ameliorates neurological deficits
following traumatic brain injury (TBI). RESULTS: Our results showed that,
following CCI, treatment with astaxanthin compared to vehicle ameliorated
neurologic dysfunctions after day 3 and alleviated cerebral edema and Evans blue
extravasation at 24 h (p < 0.05). Astaxanthin treatment decreased AQP4 and NKCC1
mRNA levels in a dose-dependent manner at 24 h. AQP4 and NKCC1 protein
expressions in the peri-contusional cortex were significantly reduced by
astaxanthin at 24 h (p < 0.05). Furthermore, we also found that bumetanide (BU),
an inhibitor of NKCC1, inhibited trauma-induced AQP4 upregulation (p < 0.05).
CONCLUSIONS: Our data suggest that astaxanthin reduces TBI-related injury in
brain tissue by ameliorating AQP4/NKCC1-mediated cerebral edema and that NKCC1
contributes to the upregulation of AQP4 after TBI.