title: Role of microRNA-146a in normal and malignant hematopoietic stem cell function.
abstract: Regulation of hematopoiesis is controlled by microRNAs (miRNAs). In this review, we focus on miR-146a, and its role in regulating normal and malignant hematopoiesis. miR-146a is a negative regulator of immune cell activation by repressing two targets, TRAF6 and IRAK1. Genetic deletion of miR-146a confirmed a role of miR-146a during innate immune signaling as well as for hematopoietic stem cell function. miR-146a is also implicated in the pathogenesis of human myelodysplastic syndromes (MDSs) as it is located within a commonly deleted region on chromosome 5, and miR-146a-deficient mice exhibit features of an MDS-like disease. With new insight into miR-146a through genetic and expression analyses, we highlight and discuss the recent advances in the understanding of miR-146a in physiological hematopoiesis during steady-state and inflammation, as well as in MDS.
authors: Division of Biology and Biological Engineering, California Institute of Technology Pasadena, CA, USA ; David Geffen School of Medicine, University of California Los Angeles, CA, USA.
authors: Jimmy L
authors: JL
authors: Zhao
authors: Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital Medical Center Cincinnati, OH, USA ; Department of Cancer Biology, University of Cincinnati Cincinnati, OH, USA.
authors: Daniel T
authors: DT
authors: Starczynowski
keywords: NF-kappa B; hematopoietic stem cells; immune system; microRNA; myelodysplastic syndromes