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Stem cells and development2014; 23(13); 1515-1523; doi: 10.1089/scd.2013.0461

Generation and characterization of leukemia inhibitory factor-dependent equine induced pluripotent stem cells from adult dermal fibroblasts.

Abstract: In this study we have reprogrammed dermal fibroblasts from an adult female horse into equine induced pluripotent stem cells (equiPSCs). These equiPSCs are dependent only on leukemia inhibitory factor (LIF), placing them in striking contrast to previously derived equiPSCs that have been shown to be co-dependent on both LIF and basic fibroblast growth factor (bFGF). These equiPSCs have a normal karyotype and have been maintained beyond 60 passages. They possess alkaline phosphatase activity and express eqNANOG, eqOCT4, and eqTERT mRNA. Immunocytochemistry confirmed that they produce NANOG, REX1, SSEA4, TRA1-60, and TRA1-81. While our equiPSCs are LIF dependent, bFGF co-stimulates their proliferation via the PI3K/AKT pathway. EquiPSCs lack expression of eqXIST and immunostaining for H3K27me3, suggesting that during reprogramming the inactive X chromosome has likely been reactivated to generate cells that have two active X chromosomes. EquiPSCs form embryoid bodies and in vitro teratomas that contain derivatives of all three germ layers. These LIF-dependent equiPSCs likely reflect a more naive state of pluripotency than equiPSCs that are co-dependent on both LIF and bFGF and so provide a novel resource for understanding pluripotency in the horse.
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Publication Date: 2014-04-01 PubMed ID: 24555755PubMed Central: PMC4066230DOI: 10.1089/scd.2013.0461Google Scholar: Lookup
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  • Journal Article
  • Research Support
  • Non-U.S. Gov't

Summary

This research summary has been generated with artificial intelligence and may contain errors and omissions. Refer to the original study to confirm details provided. Submit correction.

The researchers in this study have managed to create pluripotent stem cells from adult horse skin cells that are dependent only on a factor called leukemia inhibitory factor. This contrasts with previous attempts where two factors were needed. These created stem cells are normal, stable, and can develop into a range of tissue types which might further our understanding of pluripotency in horses.

Creation of equine induced pluripotent stem cells (equiPSCs)

  • The scientists reprogrammed adult female horse skin cells, termed ‘dermal fibroblasts’, into equine pluripotent stem cells.
  • These equiPSCs need only the leukemia inhibitory factor (LIF) to sustain them, a significant shift from prior derived equiPSCs that required both LIF and basic fibroblast growth factor (bFGF).

Characterization of equiPSCs

  • Generated equiPSCs were found to possess a normal karyotype, indicating they have a normal number and arrangement of chromosomes.
  • These cells have been stable and maintained for over 60 cycles of replication.
  • They exhibit alkaline phosphatase activity, a common characteristic of stem cells.
  • They express certain proteins (eqNANOG, eqOCT4, and eqTERT mRNA), evidence of their pluripotent nature.
  • Immunocytochemistry showed that they produce additional proteins (NANOG, REX1, SSEA4, TRA1-60, and TRA1-81) which are related to pluripotency.

Role of basic fibroblast growth factor (bFGF) and X chromosome Reactivation

  • Despite the equiPSCs being maintained just with LIF, the scientists found that bFGF aids their proliferation through a specific biochemical pathway, the PI3K/AKT pathway.
  • The researchers also noted a lack of expression of eqXIST and absence of a certain mark, H3K27me3, suggesting reactivation of the inactive X chromosome during reprogramming. Nothing that cells have two active X chromosomes indicates a more naive state of pluripotency.

Potential of equiPSCs

  • The cells are capable of forming embryoid bodies and in-vitro teratomas, which contain derivatives of all three germ layers, demonstrating their pluripotent nature.
  • This illustrates potential to develop into a wide variety of tissue types.
  • The distinct LIF-dependent equiPSCs offer a new resource for understanding pluripotency in the horse.

Cite This Article

APA
Whitworth DJ, Ovchinnikov DA, Sun J, Fortuna PR, Wolvetang EJ. (2014). Generation and characterization of leukemia inhibitory factor-dependent equine induced pluripotent stem cells from adult dermal fibroblasts. Stem Cells Dev, 23(13), 1515-1523. https://doi.org/10.1089/scd.2013.0461

Publication

Stem cells and development
ISSN: 1557-8534
NlmUniqueID: 101197107
Country: United States
Language: English
Volume: 23
Issue: 13
Pages: 1515-1523

Researcher Affiliations

Whitworth, Deanne J
  • 1 School of Veterinary Science, University of Queensland , Gatton, Queensland, Australia .
Ovchinnikov, Dmitry A
    Sun, Jane
      Fortuna, Patrick R J
        Wolvetang, Ernst J

          MeSH Terms

          • Animals
          • Biomarkers / metabolism
          • Cell Proliferation
          • Coculture Techniques
          • Feeder Cells
          • Female
          • Fibroblast Growth Factors / physiology
          • Fibroblasts / physiology
          • Gene Expression
          • Histones / metabolism
          • Horses
          • Induced Pluripotent Stem Cells / physiology
          • Leukemia Inhibitory Factor / physiology
          • Skin / cytology
          • Transcription Factors / metabolism
          • X Chromosome / genetics

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