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SDF-1α/CXCR4通路在大鼠弥漫性轴索损伤中的作用
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SDF-1α/CXCR4通路在大鼠弥漫性轴索损伤中的作用
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Journal Article
SDF-1α/CXCR4通路在大鼠弥漫性轴索损伤中的作用
2015
Overview
目的通过探讨弥漫性轴索损伤（diffuse axonal injury,DAI）后脑组织SDF-1α及CXCR4的表达以及抑制该通路后对外周炎症细胞浸润、轴索损伤和β-APP及MMP-9表达的影响,揭示SDF-1α/CXCR4通路在DAI后炎性损伤中的作用。方法采用大鼠头颅瞬间旋转装置制备大鼠DAI模型,于造模后6、24、48、72h取脑组织,采用Western blot测定脑组织SDF-1α及其受体CXCR4的表达,并且通过给予该通路特异性抑制剂,观察外周炎症细胞浸润后相关蛋白β-APP、MMP-9的表达,及脑脊液中轴索损伤相关蛋白MBP的含量,揭示其在DAI后的炎性损伤中的作用及其机制。结果 DAI模型组皮层SDF-1α及CXCR4的表达量较对照组均显著增加,测定DAI后24h,脑皮层组织中MPO阳性细胞数、β-APP、MMP-9的表达均较对照组显著升高,脑脊液中MBP的水平也较对照组明显升高;给予CXCR4特异性抑制剂AMD3100后,脑皮层组织中MPO阳性细胞数、β-APP、MMP-9的表达较DAI模型组均明显下降,并且脑脊液中MBP水平也较DAI模型组显著下降。结论 SDF-1α/CXCR4通路活化在介导大鼠DAI后脑组织的炎性损伤中具有重要作用。
Publisher
西安交通大学医学院第一附属医院神经外科,陕西西安,710061
Subject
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