Mitochondrial contributions to hematopoietic stem cell aging

Claudia Morganti, Keisuke Ito

Research output: Contribution to journalReview articlepeer-review

Abstract

Mitochondrial dysfunction and stem cell exhaustion are two hallmarks of aging. In the hematopoietic system, aging is linked to imbalanced immune response and reduced regenerative capacity in hematopoietic stem cells (HSCs), as well as an increased predisposition to a spectrum of diseases, including myelodysplastic syndrome and acute myeloid leukemia. Myeloid-biased differentiation and loss of polarity are distinct features of aged HSCs, which generally exhibit enhanced mitochondrial oxidative phosphorylation and increased production of reactive oxygen species (ROS), suggesting a direct role for mitochondria in the degenerative process. Here, we provide an overview of current knowledge of the mitochondrial mechanisms that contribute to age-related phenotypes in HSCs. These include mitochondrial ROS production, alteration/activation of mitochondrial metabolism, the quality control pathway of mitochondria, and inflammation. Greater understanding of the key machineries of HSC aging will allow us to identify new therapeutic targets for preventing, delaying, or even reversing aspects of this process.

Original languageEnglish (US)
Article number11117
JournalInternational Journal of Molecular Sciences
Volume22
Issue number20
DOIs
StatePublished - Oct 2 2021

Keywords

  • Aging
  • Hematopoiesis
  • Hematopoietic stem cell
  • Inflammation
  • Mitochondrial metabolism
  • ROS
  • Stem cell exhaustion

ASJC Scopus subject areas

  • Catalysis
  • Molecular Biology
  • Spectroscopy
  • Computer Science Applications
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry

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