HDAC1 Governs Iron Homeostasis Independent of Histone Deacetylation in Iron-Overload Murine Models.
HDAC1 Governs Iron Homeostasis Independent of Histone Deacetylation in Iron-Overload Murine Models.
复制标题
在铁超载小鼠模型中,HDAC1 独立于组蛋白脱乙酰化控制铁稳态。
DOI:
10.1089/ars.2017.7161
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发表时间:
2017-12
期刊:
影响因子:
--
通讯作者:
Wang Fudi
中科院分区:
文献类型:
--
作者:
Yin Xiangju;Wu Qian;Monga Jitender;Xie Enjun;Wang Hao;Wang Shufen;Zhang Huizhen;Wang Zhan-You;Zhou Tianhua;Shi Yujun;Rogers Jack;Lin Hening;Min Junxia;Wang Fudi
AIMS
Iron-overload disorders are common and could lead to significant morbidity and mortality worldwide. Due to limited treatment options, there is a great need to develop novel strategies to remove the excess body iron. To discover potential epigenetic modulator in hepcidin upregulation and subsequently decreasing iron burden, we performed an epigenetic screen. The in vivo effects of the identified compounds were further tested in iron-overload mouse models, including Hfe-/-, Hjv-/-, and hepatocyte-specific Smad4 knockout (Smad4fl/fl;Alb-Cre+) mice.
RESULTS
Entinostat (MS-275), the clinical used histone deacetylase 1 (HDAC1) inhibitor, was identified the most potent hepcidin agonist. Consistently, Hdac1-deficient mice also presented higher hepcidin levels than wild-type controls. Notably, the long-term treatment with entinostat in Hfe-/- mice significantly alleviated iron overload through upregulating hepcidin transcription. In contrast, entinostat showed no effect on hepcidin expression and iron levels in Smad4fl/fl;Alb-Cre+ mice. Further mechanistic studies revealed that HDAC1 suppressed expression of hepcidin through interacting with SMAD4 rather than deacetylation of SMAD4 or histone-H3 on the hepcidin promoter.
INNOVATION
The findings uncovered HDAC1 as a novel hepcidin suppressor through complexing with SMAD4 but not deacetylation of either histone 3 or SMAD4. In addition, our study suggested a novel implication of entinostat in treating iron-overload disorders.
CONCLUSIONS
Based on our results, we conclude that entinostat strongly activated hepcidin in vivo and in vitro. HDAC1 could serve as a novel hepcidin suppressor by binding to SMAD4, effect of which is independent of BMP/SMAD1/5/8 signaling. Antioxid. Redox Signal. 28, 1224-1237.
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DOI:
--
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期刊:
The EMBO journal
影响因子:
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