MicroRNA-130a is up-regulated in mouse liver by iron deficiency and targets the bone morphogenetic protein (BMP) receptor ALK2 to attenuate BMP signaling and hepcidin transcription.

ABSTRACT: Systemic iron balance is controlled by the liver peptide hormone hepcidin, which is transcriptionally regulated by the bone morphogenetic protein (BMP)-SMAD pathway. In iron deficiency, liver BMP-SMAD signaling and hepcidin are suppressed as a compensatory mechanism to increase iron availability. MicroRNAs are small regulatory RNAs that have an increasingly recognized role in many biologic processes but are only recently implicated in iron homeostasis regulation. Here, we demonstrate that liver expression of the microRNA miR-130a is up-regulated by iron deficiency in mice. We identify the BMP6-SMAD signaling pathway as a functional target of miR-130a in hepatoma-derived Hep3B cells. Although the TGF-β/BMP common mediator SMAD4 was previously reported to be an miR-130a target to inhibit TGF

SUBMITTER: Zumbrennen-Bullough KB 

PROVIDER: S-EPMC4156078 | biostudies-literature | 2014 Aug

REPOSITORIES: biostudies-literature