Blood:红细胞铁蛋白缺乏会导致血清铁不足,并促进氧化应激导致的溶血

2018-09-14 MedSci MedSci原创

中心点:红细胞上的FPN对血液的铁含量至关重要。FPN缺陷易导致红细胞氧化损伤。摘要:铁蛋白(FPN),是目前唯一已知的脊柱动物的铁出口,将铁从肠道、脾和肝血细胞转运至血液,为机体的其他组织和细胞提供铁。大部分循环铁被红细胞用来合成血红蛋白。De-Liang Zhang等人发现红细胞不仅会消耗大部分的铁,还可向血液返回大量的铁。特异性敲除有核红细胞Fpn的小鼠(Fpn KO)表现为血清铁水平低、组

中心点:

红细胞上的FPN对血液的铁含量至关重要。

FPN缺陷易导致红细胞氧化损伤。

摘要:

铁蛋白(FPN),是目前唯一已知的脊柱动物的铁出口,将铁从肠道、脾和肝血细胞转运至血液,为机体的其他组织和细胞提供铁。大部分循环铁被红细胞用来合成血红蛋白。

De-Liang Zhang等人发现红细胞不仅会消耗大部分的铁,还可向血液返回大量的铁。特异性敲除有核红细胞Fpn的小鼠(Fpn KO)表现为血清铁水平低、组织铁过负荷,脾肝FPN表达量增加,但无铁调素水平改变。研究人员还发现有中度溶血性贫血的Fpn KO小鼠对苯肼诱导的氧化应激敏感,但暴露于低铁饮食和放血时,可耐受铁缺乏,提示Fpn KO小鼠的贫血是由红细胞铁过负荷和氧化损伤导致的,而不是RBC生成缺陷。

此外,研究人员还发现携带功能获得性FPN突变的患者的平均红细胞容积(MCV)评估与血清铁蛋白饱和度正相关,但功能丧失性FPN突变患者的MCVs无此现象,提示有核红细胞是通过FPN将铁转运至血液。

总而言之,本研究表明红细胞的FPN在维持系统铁稳态和保护RBCs免受氧化损伤过程中发挥至关重要的作用,加深了我们对FPN疾病的病理生理的了解。



原始出处:

De-Liang Zhang, et al.Ferroportin deficiency in erythroid cells causes serum iron deficiency and promotes hemolysis due to oxidative stress. Blood  2018  :blood-2018-04-842997;  doi: https://doi.org/10.1182/blood-2018-04-842997

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    2019-04-20 mnda
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    2018-09-16 liumin1987

    嗯嗯,学习学习。

    0

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    2018-09-15 kafei

    学习了谢谢

    0

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    2018-09-14 医者仁心5538

    学习了

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