期刊
NATURE MEDICINE
卷 20, 期 4, 页码 398-+出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/nm.3468
关键词
-
资金
- Agence Nationale de la Recherche [ANR-10-JCJC-1108, ANR-12-BSV1-0039, ANR-11-LABX-0051, ANR-10-BLAN-1109]
- Assistance Publique Hopitaux de Paris-CNRS Contrats Hospitaliers de Recherche Translationnelle
- Institut National du Cancer
- Canceropole Ile-de-France
- Fondation pour la Recherche Medicale
- Fondation de France
- Association Laurette Fugain
- Association pour la Recherche sur le Cancer
- French National Research Agency [ANR-10-IAHU-01, ANR-11-IDEX-0005-02]
- Agence Nationale de la Recherche (ANR) [ANR-10-BLAN-1109, ANR-10-JCJC-1108] Funding Source: Agence Nationale de la Recherche (ANR)
The pathophysiology of ineffective erythropoiesis in beta-thalassemia is poorly understood. We report that RAP-011, an activin receptor IIA (ActRIIA) ligand trap, improved ineffective erythropoiesis, corrected anemia and limited iron overload in a mouse model of beta-thalassemia intermedia. Expression of growth differentiation factor 11 (GDF11), an ActRIIA ligand, was increased in splenic erythroblasts from thalassemic mice and in erythroblasts and sera from subjects with beta-thalassemia. Inactivation of GDF11 decreased oxidative stress and the amount of alpha-globin membrane precipitates, resulting in increased terminal erythroid differentiation. Abnormal GDF11 expression was dependent on reactive oxygen species, suggesting the existence of an autocrine amplification loop in beta-thalassemia. GDF11 inactivation also corrected the abnormal ratio of immature/mature erythroblasts by inducing apoptosis of immature erythroblasts through the Fas-Fas ligand pathway. Taken together, these observations suggest that ActRIIA ligand traps may have therapeutic relevance in beta-thalassemia by suppressing the deleterious effects of GDF11, a cytokine which blocks terminal erythroid maturation through an autocrine amplification loop involving oxidative stress and alpha-globin precipitation.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据