去铁酮对脑缺血再灌注大鼠海马区铁跨膜转运蛋白表达的影响
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(湖南中医药大学中西医结合心脑疾病防治湖南省重点实验室,湖南省长沙市 410208)

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廖君,博士,副教授,研究方向为心脑血管疾病的中西医结合防治,E-mail为84085006@qq.com。

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国家自然科学基金面上项目(81774174和81774033);国家自然科学基金青年项目(81303078);湖南省科技厅重点项目(2014SK2007);湖南省教育厅优秀博士学位论文获得者科研项目(YB2016B030);湖南省研究生科研创新项目(CX2015B331)


Effect of deferiprone on expression of iron transmembrane transport protein in hippocampus of cerebral ischemia-reperfusion rats
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Key Laboratory of Hunan Province for Integrated Traditional Chinese and Western Medicine on Prevention and Treatment of Cardio-Cerebral Diseases, Hunan University of Chinese Medicine, Changsha, Hunan 410208, China)

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    摘要:

    目的 研究大鼠脑缺血再灌注后去铁酮(DFP)对铁跨膜转运蛋白包括铁跨膜转入蛋白和铁跨膜转出蛋白表达的影响。方法 将48只大鼠随机分为假手术组、脑缺血再灌注组(I/R组)和去铁酮(DFP)+脑缺血再灌注组(DFP+I/R组)。各组大鼠术前1 h预处理灌胃,再行大脑中动脉线栓法脑缺血再灌注模型制备术,术后连续灌胃给药2天。术后72 h采用Longa神经行为学评分标准记录大鼠活动;普鲁士蓝染色检测海马区铁聚集情况;Western blot检测各组大鼠海马组织铁跨膜转运蛋白的表达,包括铁跨膜转入蛋白:转铁蛋白受体(TFR)和二价金属离子转运体1(DMT1);铁跨膜转出蛋白:膜铁转运蛋白(Fpn)、膜铁转运辅助蛋白(Heph)、人类猫白血病C亚类病毒受体(FLVCR)和胸腺癌抵抗蛋白(BCRP)。结果 与I/R组比较,DFP+I/R组神经行为学评分显著下降(P<0.01),神经元内铁聚集颗粒明显减少,TFR和DMT1蛋白表达明显减少(P<0.05或P<0.01),Heph、FLCVR和BCRP蛋白表达明显增加(P<0.05或P<0.01)。结论 去铁酮可以下调铁跨膜转入蛋白TFR和DMT1的表达,上调铁跨膜转出蛋白Heph、FLVCR和BCRP的表达,促进血红素铁和非血红素铁外排,降低脑铁沉积,从而减轻脑缺血再灌注后神经损伤,改善疾病预后。

    Abstract:

    Aim To investigate the effects of deferiprone (DFP) on expressions of iron transmembrane transport proteins concluding iron influx and efflux system in the hippocampus of cerebral ischemia-reperfusion rats. Methods The rats (n=48) were randomly divided into sham operation group, cerebral ischemia-reperfusion group (I/R group) and DFP+I/R group. All rats were pretreated by intragastric administration (ig) 1 h before the middle cerebral artery occlusion method for preparing cerebral ischemia-reperfusion model. After the operation, continuous ig administration was performed for days. After cerebral ischemia-reperfusion for 72 hours, the behavioral activity of rat was recorded by Longa's neurobehavioral score standard. Iron accumulation in the hippocampus was measured by DAB-intensified Perl's histochemical staining. Western blot was used to detect the expressions of iron transmembrane transport protein in hippocampus of rats in each group, including iron importin:transferrin receptor (TFR) and divalent metal ion transporter 1 (DMT1), iron exportin:ferroportin (Fpn), hephaestin (Heph), feline leukemia virus subgroup C receptor (FLVCR) and breast cancer resistance protein (BCRP). Results Compared with I/R group, the Longa's neurobehavioral score was significantly decreased (P<0.01), the number of aggregated iron particles was reduced, the protein expressions of TFR and DMT1 were significantly decreased (P<0.05 or P<0.01), and the protein expressions of Heph, FLCVR and BCRP were up-regulated (P<0.05 or P<0.01), in the DFP+I/R group. Conclusions Deferiprone can reduce the expressions of iron importin TFR and DMT1, increase the expressions of iron exportin Heph, FLVCR and BCRP, promote the efflux of heme iron and non-heme iron and reduce brain iron deposition. Thus it can decrease nerve damage after cerebral ischemia-reperfusion and improve the disease prognosis.

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廖君,黄娟,石咏梅,余清平,吴万丰,王国佐,葛金文.去铁酮对脑缺血再灌注大鼠海马区铁跨膜转运蛋白表达的影响[J].中国动脉硬化杂志,2018,26(6):577~582.

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  • 收稿日期:2017-10-23
  • 最后修改日期:2018-02-11
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  • 在线发布日期: 2018-07-10