title: Metabolic plasticity and hematopoietic stem cell biology.
abstract: OBJECTIVE
  Hematopoietic stem cells (HSCs) residing in the hypoxic niches can both self-renew and give rise to progeny. Multiple regulatory mechanisms for these cellular processes have been identified. Emerging evidence has revealed that metabolism and bioenergetics play important roles in determining stem cell fate in concert with other regulatory networks. In this review, we will discuss recent advances in this field.
  
  
  RESULTS
  Recent studies have helped define and redefine metabolic regulation of HSCs. Resting quiescent stem cells use primarily anaerobic glycolysis for energy production and this metabolic program is required to maintain a functional quiescent state. However, when they exit this state and rapidly proliferate and differentiate into different blood cell types, a robust up-regulation of energy metabolism is expected to meet the quickly rising energy demand. Dysregulation of metabolism in HSCs results in various blood disorders, including leukemia.
  
  
  CONCLUSIONS
  Energy metabolism and HSC activity influence and interlink each other in a highly sophisticated and orchestrated manner. Understanding metabolic regulation of HSC function has significant implications for HSC-based therapies and leukemogenesis research.
authors.affiliation: Department of Medicine, Division of Hematology and Oncology, Center for Stem Cell and Regenerative Medicine, Case Comprehensive Cancer Center, Case Western Reserve University, Cleveland, Ohio 44106, USA.
authors.forename: Peter
authors.initials: P
authors.lastname: Hsu
authors.forename: Cheng-Kui
authors.initials: CK
authors.lastname: Qu
mesh_terms: D002454:Cell Differentiation / Q000502:physiology; D049109:Cell Proliferation; D004734:Energy Metabolism / Q000502:physiology*; D006412:Hematopoietic Stem Cells / Q000502:physiology*; D006801:Humans; D015398:Signal Transduction / Q000502:physiology