The IRP1-HIF-2α axis coordinates iron and oxygen sensing with erythropoiesis and iron absorption.
The IRP1-HIF-2α axis coordinates iron and oxygen sensing with erythropoiesis and iron absorption.
复制标题
DOI:
10.1016/j.cmet.2013.01.007
复制
发表时间:
2013-02-05
期刊:
影响因子:
29
通讯作者:
Eisenstein RS
中科院分区:
文献类型:
--
作者:
Anderson SA;Nizzi CP;Chang YI;Deck KM;Schmidt PJ;Galy B;Damnernsawad A;Broman AT;Kendziorski C;Hentze MW;Fleming MD;Zhang J;Eisenstein RS
Red blood cell production is a finely tuned process that requires coordinated oxygen- and iron-dependent regulation of cell differentiation and iron metabolism. Here we show that translational regulation of HIF-2α synthesis by IRP1 is critical for controlling erythrocyte number. IRP1 null mice (Irp1−/−) display a marked transient polycythemia. HIF-2α mRNA is derepressed in kidney of Irp1−/− but not Irp2−/− mice leading to increased renal erythropoietin (Epo) mRNA and inappropriately elevated serum Epo levels. Expression of the iron transport genes DCytb, DMT1 and ferroportin as well as other HIF-2α targets is enhanced in IRP1−/− duodenum. Analysis of mRNA translation state in liver revealed IRP1-dependent dysregulation of HIF-2α mRNA translation while IRP2 deficiency derepressed translation of all other known 5′ IRE-containing mRNAs expressed in liver. These results uncover separable physiological roles of each IRP and identify IRP1 as a therapeutic target for manipulating HIF-2α action in hematologic, oncologic and other disorders.
登录
查看更多内容
影响因子:
29
作者:
Shah YM;Matsubara T;Ito S;Yim SH;Gonzalez FJ
通讯作者:
Gonzalez FJ
影响因子:
20.3
作者:
Peslak, Scott A.;Wenger, Jesse;Palis, James
通讯作者:
Palis, James
影响因子:
20.3
作者:
Galy, B;Ferring, D;Hentze, MW
通讯作者:
Hentze, MW
影响因子:
20.3
作者:
Schmidt, Paul J.;Andrews, Nancy C.;Fleming, Mark D.
通讯作者:
Fleming, Mark D.
影响因子:
20.3
作者:
Scortegagna, M;Ding, K;Garcia, JA
通讯作者:
Garcia, JA