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EASL 2014:HFE转录表达调节十二指肠对食物铁的吸收

2014-05-21 佚名 dxy

膳食中的铁对维持人体铁平衡的重要性是毋庸置疑的,HFE蛋白与可对变异体进行选择性剪切的HFE编码基因对可溶性 HFE蛋白的合成非常重要。本研究旨在探讨不同的铁环境中HFE的转录水平。 研究分别在十二指肠、自噬和肝星状细胞中及人体肝脏组织中做了检测,并进一步明确在十二指肠细胞模型中sHFE(可溶性HFE)基因对于铁代谢相关基因表达的影响。 研究检测了holo-T试剂刺激后的HuTu-80细胞、 激活

膳食中的铁对维持人体铁平衡的重要性是毋庸置疑的,HFE蛋白与可对变异体进行选择性剪切的HFE编码基因对可溶性 HFE蛋白的合成非常重要。本研究旨在探讨不同的铁环境中HFE的转录水平。

研究分别在十二指肠、自噬和肝星状细胞中及人体肝脏组织中做了检测,并进一步明确在十二指肠细胞模型中sHFE(可溶性HFE)基因对于铁代谢相关基因表达的影响。

研究检测了holo-T试剂刺激后的HuTu-80细胞、 激活的THP1细胞和HepG2细胞中sHFE 的转录水平,同时也在慢性丙肝病人肝脏组织的RNA中进行检测。使用RT-qPCR检测sHFE 蛋白过表达后铁代谢相关基因的表达。

结果表明,尽管总的HFE水平没有明显变化,但细胞内的铁能够上调 sHFE的转录表达。在慢性丙肝患者的肝脏组织中,外周血中的铁标志物与sHFE没有明显相关性。

内源性全长HFE和sHFE 蛋白能够下调Hephaestin和十二指肠中细胞色素B的表达,外源性sHFE 通过一种依懒性胞吞机制也可以下调hephaestin(希菲斯特)蛋白的水平。

总之,sHFE是一个重要的铁代谢平衡调节因子,其水平的高低与细胞内铁关系密切,它调控着 hephaestin(希菲斯特蛋白)和十二指肠细胞色素B的表达。

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    2014-10-15 mjldent
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    2014-05-23 kord1983
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    2014-05-23 yhy100201
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    2014-05-23 lq1771

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