Blood:抗ERFE抗体可阻断铁调素抑制,减轻地中海贫血

2020-01-04 QQY MedSci原创

中心点:在体内,ERFE的N末端以纳米级亲和力与BMP6结合,可有效抑制BMP信号和铁调素。抗ERFE N-末端抗体可抑制Wpo诱导的铁调素抑制,减轻贫血小鼠的铁积累和贫血。摘要:Erythroferrone(ERFR)是有核红细胞受促红细胞生成素(EPO)刺激后分泌的一种糖蛋白类激素,作用于肝脏,可防止BMP6刺激铁调素。铁调素抑制会允许将铁动员到骨髓以合成红细胞。应力性红细胞生成条件下,如β地

中心点:

在体内,ERFE的N末端以纳米级亲和力与BMP6结合,可有效抑制BMP信号和铁调素。

抗ERFE N-末端抗体可抑制Wpo诱导的铁调素抑制,减轻贫血小鼠的铁积累和贫血。

摘要:

Erythroferrone(ERFR)是有核红细胞受促红细胞生成素(EPO)刺激后分泌的一种糖蛋白类激素,作用于肝脏,可防止BMP6刺激铁调素。铁调素抑制会允许将铁动员到骨髓以合成红细胞。

应力性红细胞生成条件下,如β地中海贫血的患者,异常高循环ERFE可促进组织铁积累,导致这些患者的发病率增加。

Arezes等人开发了一种抗ERFE的抗体,可阻止铁调素抑制,并纠正β地中海贫血(Hbb[th3/+])小鼠模型的铁负荷表型;以这些抗体为工具还可进一步解析ERFE的作用机制。

研究人员发现ERFE与BMP6结合,亲和力为纳米级,而与BMP2和BMP4结合的亲和力就稍弱一些。BMP6与ERFE的N末端结构域结合,可有效抑制Huh7肝细胞和野生型小鼠的铁调素抑制。抗ERFE抗体,靶向其N末端结构域,可阻止ERFE处理的Huh7细胞和EPO处理的小鼠的铁调素抑制。

最后,研究人员还发现抗ERFE处理的Hbb(th3/+)小鼠脾肿大缩小、血清和肝铁含量下降,同时红细胞和血红蛋白水平升高,网状细胞计数下降。

总而言之,本研究表明ERFE与BMP6直接结合,且具有很高的亲和力,靶向ERFE N末端结构域的抗体可阻止ERFE-BMP6相互作用,为铁负荷的贫血患者提供了一种潜在的治疗方案。

原始出处:

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    2020-11-30 zhs3882
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