Cited by 778Hematopoietic Stem Cell TransplantationSingle-cell and spatial transcriptomicsGenetics, Aging, and Longevity in Model Organisms

Single-cell RNA-seq reveals changes in cell cycle and differentiation programs upon aging of hematopoietic stem cells

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Kowalczyk, Monika S., Tirosh, Itay, Heckl, Dirk, Rao, Tata Nageswara, Dixit, Atray, Haas, Brian J., Schneider, Rebekka K., Wagers, Amy J. +2 more·2015·Genome Research

Abstract

Both intrinsic cell state changes and variations in the composition of stem cell populations have been implicated as contributors to aging. We used single-cell RNA-seq to dissect variability in hematopoietic stem cell (HSC) and hematopoietic progenitor cell populations from young and old mice from two strains. We found that cell cycle dominates the variability within each population and that there is a lower frequency of cells in the G1 phase among old compared with young long-term HSCs, suggesting that they traverse through G1 faster. Moreover, transcriptional changes in HSCs during aging are inversely related to those upon HSC differentiation, such that old short-term (ST) HSCs resemble young long-term (LT-HSCs), suggesting that they exist in a less differentiated state. Our results indicate both compositional changes and intrinsic, population-wide changes with age and are consistent with a model where a relationship between cell cycle progression and self-renewal versus differentiation of HSCs is affected by aging and may contribute to the functional decline of old HSCs.

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Crossref · 10.1101/gr.192237.115

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  • Our results are conceptually consistent with previous reports of large transcriptional changes with age in some cell identities and more subtle changes in others.

    “Our results are conceptually consistent with previous reports of large transcriptional changes with age in some cell identities and more subtle changes in others (Kowalczyk et al. 2015; Keyes et al. 2016; Davie et al. 2018; Keyes and Fuchs 2018).”
  • Single-cell analysis provides a means of systematically detecting cellular subtypes that cannot be defined by a handful of markers or for which markers are not yet known.

    “Whereas cell types were traditionally defined based on criteria such as morphology, physiology, and marker protein expression, single-cell analysis provides a means of systematically detecting cellular subtypes that cannot be defined by a handful of markers, or for which markers are not yet known102.”
  • Age-associated gene expression changes have been identified at single-cell level in hematopoietic stem and progenitor cells, suggesting that for some tissues, cellular composition changes cannot fully explain age-associated epigenomic dysregulation.

    “age-associated gene expression changes have recently been identified at the single-cell level in hematopoietic stem and progenitor cells (Kowalczyk et al., 2015), suggesting that at least for some tissues, changes in the cellular composition of a tissue with age cannot fully explain age-associated epigenomic dysregulation.”

    From The Aging Epigenome (2016) · cites this paper as Kowalczyk et al., 2015

  • Single cell analyses in the hematopoietic system identified distinct aged and young transcriptional phenotypes and altered cell cycle kinetics.

    “Single cell analyses in the hematopoietic system identified distinct aged and young transcriptional phenotypes (as in the different paths model), and altered cell cycle kinetics (as in the different rates model) (Kowalczyk et al., 2015), suggesting that both models are plausible in the context of myogenic activation.”

    From Aging induces aberrant state transition kinetics in murine muscle stem cells (2020) · cites this paper as Kowalczyk et al., 2015

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Research works printed but not linked: 1

  1. Metcalf D. 1998 Lineage commitment and maturation in hematopoietic cells: the case for extrinsic regulation. Blood 92: 345– 347; discussion 352. 9657727

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Authors
Kowalczyk, M. S., Tirosh, I., Heckl, D., Rao, T. N., Dixit, A., Haas, B. J., Schneider, R. K., Wagers, A. J., Ebert, B. L., & Regev, A.
Affiliations
  • Broad Institute (US)
  • Brigham and Women's Hospital (US)
  • Joslin Diabetes Center (US)
Venue
Genome Research
Published
2015-10-01
Volume
25
Issue
12
Pages
1860-1872
ISSN
  • 1088-9051 (ISSN-L)
  • 1549-5469
OpenAlex
W2184331293
Cited by
778
References
75
Citations by year
2026: 48 · 2025: 86 · 2024: 110 · 2023: 81 · 2022: 93 · 2021: 78 · 2020: 93 · 2019: 69 · 2018: 47 · 2017: 45 · 2016: 25 · 2015: 1 · 2013: 1
Type
posted content
Language
en
Open access
Locations
  • Genome Research (publishedVersion)
  • PubMed Central (publishedVersion, cc-by-nc)
  • PubMed (publishedVersion)
  • DSpace@MIT (Massachusetts Institute of Technology) (submittedVersion, cc-by-nc)
Funders
  • European Hematology Association
  • EMBO Long Term Fellowship
  • HFSP Long Term Fellowship
  • Rothschild Fellowship
  • German Cancer Foundation
  • Leukemia and Lymphoma Society
  • National Institutes of Health (P01 CA066996)
  • HHMI
  • NIH CEGS (1P50HG006193-01)
  • Klarman Family Foundation
  • Howard Hughes Medical Institute
Topics
  • Health Sciences › Medicine › Hematology › Hematopoietic Stem Cell Transplantation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Single-cell and spatial transcriptomics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Aging › Genetics, Aging, and Longevity in Model Organisms
Keywords
hematopoietic stem cells, aging, cell cycle, G1 phase, hematopoietic progenitor cells, HSC differentiation, self-renewal, long-term HSCs, gene expression changes, stem cell heterogeneity, mouse strains
MeSH terms
Age Factors, Animals, Cell Cycle, Cell Differentiation, Female, Gene Expression Regulation, Hematopoietic Stem Cells, Models, Biological, Organ Specificity, Phenotype, Transcription, Genetic, Biomarkers, Cluster Analysis, Cellular Senescence, Sequence Analysis, RNA, Computational Biology, Gene Expression Profiling, Multipotent Stem Cells, Mice, Single-Cell Analysis, High-Throughput Nucleotide Sequencing, Transcriptome

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