Duodenal ferroportin is up-regulated in patients with chronic hepatitis C.

Duodenal ferroportin is up-regulated in patients with chronic hepatitis C.
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慢性丙型肝炎患者十二指肠铁转运蛋白上调

DOI:
10.1371/journal.pone.0110658
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发表时间:
2014
期刊:
影响因子:
3.7
通讯作者:
Yang J
Yang J
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Ma L;Zou T;Yuan Y;Lv J;Dong X;Yang G;Zhu Y;Luo J;Zhang Z;Yang J

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丙型肝炎病毒(HCV)感染是肝脏相关死亡的主要原因。慢性丙型肝炎(CHC)经常与铁稳态紊乱有关,血清铁和肝脏铁储备升高。越来越多的证据表明,慢性HCV感染抑制了肝铁调素的表达,铁调素是铁稳态的关键介质,导致铁超载状况。由于铁调素介导膜铁转运蛋白(一种参与细胞释放铁的基底外侧转运蛋白)的降解,因此铁调素表达减少可能导致CHC患者膜铁转运蛋白-1(Fpn 1)上调。在这项研究中,我们确定了十二指肠Fpn 1的蛋白水平,并发现其表达显着上调CHC患者。十二指肠Fpn 1表达与hepcidin mRNA水平呈负相关,与血清铁参数呈正相关。虽然铁是多种致病菌生长的关键因素,但我们的研究结果表明,血液中的铁过载不会增加CHC患者的细菌感染率。
Hepatitis C virus (HCV) infection is a leading cause of liver-related mortality. Chronic hepatitis C (CHC) is frequently associated with disturbances in iron homeostasis, with serum iron and hepatic iron stores being elevated. Accumulating evidence indicates that chronic HCV infection suppresses expression of hepatic hepcidin, a key mediator of iron homeostasis, leading to iron overload conditions. Since hepcidin mediates degradation of ferroportin, a basolateral transporter involved in the release of iron from cells, diminished hepcidin expression probably leads to up-regulation of ferroportin-1 (Fpn1) in patients with CHC. In this study, we determined the protein levels of duodenal Fpn1, and found that its expression was significantly up-regulated in patients with CHC. The expression of duodenal Fpn1 is negatively correlated with mRNA levels of hepcidin, and positively correlated with serum iron parameters. Although iron is a critical factor for growth of a variety of pathogenic bacteria, our results suggest that iron overload in blood does not increase the infection rate of bacteria in patients with CHC.
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