Blood:EREE通过隔离BMP2/6与1型BMP受体ALK3结合下调铁调素

2019-12-09 QQY MedSci原创

中心点:Erythroferrone和促红细胞生成素抑制铁调素需要I型BMP受体ALK3的参与。Erythroferrone可结合通过ALK3调节铁调素的BMP2/6异二聚体。摘要:Erythroferrone (ERFE) 对于通过促红细胞生成素驱动来抑制铁调素以确保足够的铁供应至关重要。但过度抑制铁调素会导致β-地中海贫血患者铁过载。ERFE通过干扰骨形态发生蛋白(BMP)-SMAD信号来抑制

中心点:

Erythroferrone和促红细胞生成素抑制铁调素需要I型BMP受体ALK3的参与。

Erythroferrone可结合通过ALK3调节铁调素的BMP2/6异二聚体。

摘要:

Erythroferrone (ERFE) 对于通过促红细胞生成素驱动来抑制铁调素以确保足够的铁供应至关重要。但过度抑制铁调素会导致β-地中海贫血患者铁过载。ERFE通过干扰骨形态发生蛋白(BMP)-SMAD信号来抑制铁调素。

为了明确BMP受体是否参与ERFE对铁调素的抑制,研究人员检测了用siRNA敲低或敲除肝细胞BMP受体,在有无BMP配体存在的情况下,对ERFE或促红细胞生成素(EPO)介导的铁调素抑制的影响。

无论是在体外和小鼠体内,敲低或敲除I型BMP受体ALK3,均可抑制ERFE-和EPO-介导的铁调素抑制。敲低ALK3还可抑制BMP2诱导的铁调素,但不影响BMP6诱导的铁调素;然而,EREE仅抑制BMP6,并不抑制BMP2。

为了解析上述差异,研究人员进一步检测了敲低I型受体和EREE对异二聚体BMP2/6配体诱导的铁调素的影响。BMP2/6优先利用ALK3刺激铁调素,可被EREE抑制。而且,EREE是与BMP2/6或BMP6直接结合,而非BMP2或ALK3。

上述数据表明,BMP2和BMP6作为体内异二聚配体,优先利用ALK3调节铁调素,并在促红细胞生成素驱动下通过直接与ERFE结合而被抑制。

原始出处:

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    2020-11-14 HNYYM
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    2020-05-01 30397604
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    2020-04-18 xlysu
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    2020-09-26 piaojinhua
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    2020-09-08 heli0118
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