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In vitro cellular & developmental biology. Animal2023; doi: 10.1007/s11626-023-00800-3

Equine induced pluripotent stem cells are responsive to inflammatory cytokines before and after differentiation into musculoskeletal cell types.

Abstract: Persistent inflammation is associated with the poor regeneration of musculoskeletal tissues. Embryonic stem cells (ESCs) have an attenuated response to inflammatory cytokines, but there are mixed reports on the response of induced pluripotent stem cells (iPSCs) to inflammation. Horses provide a relevant large animal model for studying musculoskeletal tissue diseases and the testing of novel therapies. The aim of this study was to determine if equine iPSCs are responsive to the inflammatory cytokines IL-1β, TNFα and IFN-γ in their undifferentiated state, or following differentiation into tendon and cartilage-like cells. We demonstrated that in undifferentiated iPSCs, the cytokines induce NF-κB P65 and STAT1 nuclear translocation which leads to cell death, decreased OCT4 expression and increased expression of inflammatory genes. Following differentiation towards cartilage-like cells exposure to the cytokines resulted in STAT1 nuclear translocation, changes in cartilage gene expression and increased expression of matrix metalloproteinases (MMPs) and inflammatory genes. Exposure of iPSC-derived tendon-like cells to the cytokines resulted nuclear translocation of NF-κB P65 and STAT1, altered tendon gene expression, increased MMP expression and increased expression of inflammatory genes. Equine iPSCs are therefore capable of responding to inflammatory stimulation and this may have relevance for their future clinical application.
Publication Date: 2023-08-15 PubMed ID: 37582999PubMed Central: 2195860DOI: 10.1007/s11626-023-00800-3Google Scholar: Lookup
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  • Journal Article

Summary

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The study reveals that horse-derived pluripotent stem cells are sensitive to inflammation both in their raw and derived state into musculoskeletal cell types. This becomes significant in the context of inflammatory diseases affecting musculoskeletal structures and could provide important insights for future regenerative therapies.

Research Purpose and Context

  • The article presents research in the field of regenerative medicine, specifically focusing on induced pluripotent stem cells (iPSCs) derived from horses. Horses are considered a useful large animal model in studying musculoskeletal disorders and related therapies.
  • Persistent inflammation is known to hinder the regeneration of musculoskeletal tissues, and the researchers aim to study the response of iPSCs to inflammatory cytokines before and after these cells have differentiated into tendon and cartilage-like cells.

Methodology

  • The research focuses on how equine iPSCs respond to pro-inflammatory cytokines, specifically IL-1β, TNFα, and IFN-γ.
  • These interactions were studied in their undifferentiated state (raw stem cells) and in differentiated states as tendon and cartilage-like cells.
  • The induced changes including nuclear translocation of NF-κB P65 and STAT1, cell death, altered gene expression, and increased expression of matrix metalloproteinases (MMPs) and inflammatory genes were also examined.

Key Findings

  • The researchers found that these inflammatory cytokines induce changes in undifferentiated iPSCs, marked by nuclear translocation of NF-κB P65 and STAT1, leading to cell death, decreased OCT4 expression, and heightened expression of inflammatory genes.
  • When iPSCs were differentiated into cartilage-like cells and exposed to these cytokines, the observed changes included STAT1 nuclear translocation and altered cartilage gene and MMP expression.
  • The same cytokines induced the nuclear translocation of NF-κB P65 and STAT1 and increased inflammatory gene expression in the iPSC-derived tendon-like cells.

Implications of the Research

  • The results demonstrate that equine iPSCs, in both their undifferentiated state and when differentiated into musculoskeletal cell types, are capable of responding to inflammatory cytokines.
  • This has potential implications for future use of these cells in a clinical setting, particularly in the treatment of inflammatory-related musculoskeletal disorders, as these cells can react and potentially exacerbate the inflammatory condition.
  • Moving forward, this could influence how stem cells are used in regenerative therapy and may pave the way for developing measures to modify such responses to inflammation.

Cite This Article

APA
Palomino Lago E, Jelbert ER, Baird A, Lam PY, Guest DJ. (2023). Equine induced pluripotent stem cells are responsive to inflammatory cytokines before and after differentiation into musculoskeletal cell types. In Vitro Cell Dev Biol Anim. https://doi.org/10.1007/s11626-023-00800-3

Publication

ISSN: 1543-706X
NlmUniqueID: 9418515
Country: Germany
Language: English

Researcher Affiliations

Palomino Lago, Esther
  • Department of Clinical Sciences and Services, The Royal Veterinary College, Hawkshead Lane, North Mymms, Hatfield, AL9 7TA, Herts, UK.
Jelbert, Elizabeth R
  • Department of Clinical Sciences and Services, The Royal Veterinary College, Hawkshead Lane, North Mymms, Hatfield, AL9 7TA, Herts, UK.
Baird, Arabella
  • Animal Health Trust, Lanwades Park, Kentford, Newmarket, CB8 7UU, UK.
Lam, Pak Y
  • Department of Clinical Sciences and Services, The Royal Veterinary College, Hawkshead Lane, North Mymms, Hatfield, AL9 7TA, Herts, UK.
Guest, Deborah J
  • Department of Clinical Sciences and Services, The Royal Veterinary College, Hawkshead Lane, North Mymms, Hatfield, AL9 7TA, Herts, UK. djguest@rvc.ac.uk.

Grant Funding

  • S21-1022-1061 / Petplan Charitable Trust
  • vet/prj/792 / Horserace Betting Levy Board

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