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Iron distribution in different tissues of homozygous Mask (msk/msk) mice and the effects of oral iron treatments
American Journal of Hematology ( IF 10.1 ) Pub Date : 2021-08-03 , DOI: 10.1002/ajh.26311
Michela Asperti 1 , Elisa Brilli 2 , Andrea Denardo 1 , Magdalena Gryzik 1 , Francesca Pagani 1 , Fabiana Busti 3 , Germano Tarantino 2 , Paolo Arosio 1 , Domenico Girelli 3, 4 , Maura Poli 1
Affiliation  

Iron-refractory iron deficiency anemia (IRIDA) is an autosomal recessive disorder caused by genetic mutations on TMPRSS6 gene which encodes Matriptase2 (MT2). An altered MT2 cannot appropriately suppress hepatic BMP6/SMAD signaling in case of low iron, hence hepcidin excess blocks dietary iron absorption, leading to a form of anemia resistant to oral iron supplementation. In this study, using the IRIDA mouse model Mask, we characterized homozygous (msk/msk) compared to asymptomatic heterozygous (msk/wt) mice, assessing the major parameters of iron status in different organs, at different ages in both sexes. The effect of carbonyl iron diet was analyzed as control iron supplementation being used for many studies in mice. It resulted effective in both anemic control and msk/msk mice, as expected, even if there is no information about its mechanism of absorption. Then, we mainly compared two forms of oral iron supplement, largely used for humans: ferrous sulfate and Sucrosomial iron. In anemic control mice, the two oral formulations corrected hemoglobin levels from 11.40 ± 0.60 to 15.38 ± 1.71 g/dl in 2–4 weeks. Interestingly, in msk/msk mice, ferrous sulfate did not increase hemoglobin likely due to ferroportin/hepcidin-dependent absorption, whereas Sucrosomial iron increased it from 11.50 ± 0.60 to 13.53 ± 0.64 g/dl mainly in the first week followed by a minor increase at 4 weeks with a stable level of 13.30 ± 0.80 g/dl, probably because of alternative absorption. Thus, Sucrosomial iron, already used in other conditions of iron deficiency, may represent a promising option for oral iron supplementation in IRIDA patients.

中文翻译:

纯合子Mask(msk/msk)小鼠不同组织中铁的分布及口服铁剂治疗的效果

难治性缺铁性贫血 (IRIDA) 是一种由TMPRSS6基因突变引起的常染色体隐性遗传病编码Matriptase2(MT2)的基因。在铁含量低的情况下,改变的 MT2 不能适当地抑制肝脏 BMP6/SMAD 信号传导,因此过量的铁调素会阻碍膳食铁的吸收,导致一种对口服补铁有抵抗力的贫血症。在这项研究中,我们使用 IRIDA 小鼠模型 Mask,与无症状杂合子 (msk/wt) 小鼠相比,对纯合子 (msk/msk) 进行了表征,评估了两性在不同年龄、不同器官中铁状态的主要参数。分析了羰基铁饮食的影响,作为用于许多小鼠研究的对照铁补充剂。正如预期的那样,它对贫血控制和 msk/msk 小鼠都有效,即使没有关于其吸收机制的信息。然后,我们主要比较了两种主要用于人类的口服铁补充剂:硫酸亚铁和蔗糖体铁。在贫血对照小鼠中,两种口服制剂在 2-4 周内将血红蛋白水平从 11.40 ± 0.60 校正到 15.38 ± 1.71 g/dl。有趣的是,在 msk/msk 小鼠中,硫酸亚铁不会增加血红蛋白,这可能是由于 ferroportin/hepcidin 依赖性吸收,而 Sucrosomial 铁主要在第一周将血红蛋白从 11.50 ± 0.60 增加到 13.53 ± 0.64 g/dl,随后略有增加4 周时稳定在 13.30 ± 0.80 g/dl,可能是因为其他吸收。因此,已经用于其他缺铁情况的蔗糖体铁可能是 IRIDA 患者口服补铁的一种有希望的选择。在 msk/msk 小鼠中,硫酸亚铁不会增加血红蛋白,可能是由于铁转运蛋白/铁调素依赖性吸收,而 Sucrosomial 铁主要在第一周将血红蛋白从 11.50 ± 0.60 增加到 13.53 ± 0.64 g/dl,随后在 4 周时略有增加周,稳定水平为 13.30 ± 0.80 g/dl,可能是因为替代吸收。因此,已经用于其他缺铁情况的蔗糖体铁可能是 IRIDA 患者口服补铁的一种有希望的选择。在 msk/msk 小鼠中,硫酸亚铁不会增加血红蛋白,可能是由于铁转运蛋白/铁调素依赖性吸收,而 Sucrosomial 铁主要在第一周将血红蛋白从 11.50 ± 0.60 增加到 13.53 ± 0.64 g/dl,随后在 4 周时略有增加周,稳定水平为 13.30 ± 0.80 g/dl,可能是因为替代吸收。因此,已经用于其他缺铁情况的蔗糖体铁可能是 IRIDA 患者口服补铁的一种有希望的选择。
更新日期:2021-09-08
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