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1. Department of Orthopaedics
2. State Key Laboratory of Trauma
3. School of Life Science and Engineering
4. Department of Biochemistry and Molecular Biology
纸质出版日期:2021,
网络出版日期:2021-3-15,
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Ao Xiong, Renping Xiong, Jing Yu, 等. Aquaporin-4 is a potential drug target for traumatic brain injury via aggravating the severity of brain edema[J]. Burns & Trauma, 2021,9(1).
Ao Xiong, Renping Xiong, Jing Yu, Yijia Liu, Ke Liu, Ge Jin, Jianzhong Xu, Jun Yan, Aquaporin-4 is a potential drug target for traumatic brain injury via aggravating the severity of brain edema, Burns & Trauma, Volume 9, 2021, tkaa050, https://doi.org/10.1093/burnst/tkaa050
Ao Xiong, Renping Xiong, Jing Yu, 等. Aquaporin-4 is a potential drug target for traumatic brain injury via aggravating the severity of brain edema[J]. Burns & Trauma, 2021,9(1). DOI: 10.1093/burnst/tkaa050.
Ao Xiong, Renping Xiong, Jing Yu, Yijia Liu, Ke Liu, Ge Jin, Jianzhong Xu, Jun Yan, Aquaporin-4 is a potential drug target for traumatic brain injury via aggravating the severity of brain edema, Burns & Trauma, Volume 9, 2021, tkaa050, https://doi.org/10.1093/burnst/tkaa050 DOI:
BackgroundTraumatic brain edema (TBE) is caused by a specific water channel mediated by membrane aquaporins. Aquaporin-4 (AQP4) plays an especially important role in this process
but the relationship between AQP4 and TBE remains unclear. The purpose of this study was to explore expression of AQP4 in the hippocampus after traumatic brain injury (TBI)
as well as the effect of brain edema on skeletal protein and its function in hippocampal neurons.MethodsThe adult male Wistar rats we divided into a sham group and a TBI group
the latter of which was further divided into 1
3
6
12
24 and 72 hours (h) and 15 days (d) post injury subgroups. A proper TBI model was established
and brain edema was assessed in each group by water content. We measured the abundance of various proteins
including hypoxia inducible factor-1α (HIF-1α)
AQP4
microtubule-associated protein 2 (MAP2)
tau-5 protein
phosphorylated level of TAU
synaptophysin
cyclic adenosine monophosphate response element binding protein (CREB)
phosphorylated CREB and general control nonrepressed 2
in each group. Hippocampal neurons and spatial memory test were analyzed in different time points.ResultsCompared with that in the sham group
the level of AQP4 in hippocampal neurons began to significantly increase at 1 h post TBI and then decreased at 15 d post TBI. During this time frame
AQP4 level peaked at 12 and 72 h
and these peaks were closely correlated with high brain water content. HIF-1α displayed a similar trend. Conversely
levels of MAP2 began to decrease at 1 h post TBI and then increase at 15 d post TBI. In addition
the most severe brain edema in rats was found at 24 h post TBI
with neuronal loss and hippocampal dendritic spine injury. Compared to those in the sham group
rats in the TBI groups had significantly prolonged latency and significantly shortened exploration time.ConclusionsAQP4 level was closely correlated with severity of brain edema
and abnormal levels thereof aggravated such severity after TBI.
Aquaporin-4Brain edemaTraumatic brain injuryHypoxia inducible factor-1αMicrotubule-associated protein 2
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