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Cells2021; 10(11); doi: 10.3390/cells10112972

Macroscopic, Histologic, and Immunomodulatory Response of Limb Wounds Following Intravenous Allogeneic Cord Blood-Derived Multipotent Mesenchymal Stromal Cell Therapy in Horses.

Abstract: Limb wounds are common in horses and often develop complications. Intravenous multipotent mesenchymal stromal cell (MSC) therapy is promising but has risks associated with intravenous administration and unknown potential to improve cutaneous wound healing. The objectives were to determine the clinical safety of administering large numbers of allogeneic cord blood-derived MSCs intravenously, and if therapy causes clinically adverse reactions, accelerates wound closure, improves histologic healing, and alters mRNA expression of common wound cytokines. Wounds were created on the metacarpus of 12 horses. Treatment horses were administered 1.51-2.46 × 108 cells suspended in 50% HypoThermosol FRS, and control horses were administered 50% HypoThermosol FRS alone. Epithelialization, contraction, and wound closure rates were determined using planimetric analysis. Wounds were biopsied and evaluated for histologic healing characteristics and cytokine mRNA expression. Days until wound closure was also determined. The results indicate that 3/6 of treatment horses and 1/6 of control horses experienced minor transient reactions. Treatment did not accelerate wound closure or improve histologic healing. Treatment decreased wound size and decreased all measured cytokines except transforming growth factor-β3. MSC intravenous therapy has the potential to decrease limb wound size; however, further work is needed to understand the clinical relevance of adverse reactions.
Publication Date: 2021-11-01 PubMed ID: 34831196PubMed Central: PMC8616408DOI: 10.3390/cells10112972Google Scholar: Lookup
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  • Journal Article
  • Randomized Controlled Trial
  • Veterinary
  • 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.

This study assesses the potential of using multipotent mesenchymal stromal cells (MSCs) derived from cord blood, administered intravenously, in treating limb wounds in horses. The results show a potential reduction in wound size, but do not demonstrate improved wound closure or histologic healing. Adverse reactions were also noted, requiring further study.

Study Design and Objectives

  • The research aimed to investigate whether cord blood-derived MSC therapy could enhance healing of limb wounds in horses. This included assessing safety, potential adverse reactions, acceleration of wound closure, histologic healing, and changes in cytokine gene expression.
  • The study involved creating wounds on the metacarpus (part of the front leg) of 12 horses split into two groups: one receiving the MSC therapy, and the other treated with just the carrier solution, HypoThermosol FRS.

Procedure and Outcomes

  • The MSC-treated horses were administered large numbers of allogeneic cord blood-derived MSCs intravenously, while the control horses received only the HypoThermosol FRS.
  • The healing process was monitored regularly: wound closure rates were measured using planimetric analysis, biopsied wound tissue was examined histologically, and cytokine mRNA expression was analyzed.
  • Adverse reactions to the treatment were also recorded and tracked.
  • The study found that three treatment horses and one control horse experienced minor temporary reactions.

Findings and Further Research

  • MSC therapy did not accelerate wound closure or enhance histologic healing.
  • However, the treatment managed to decrease the wound size and reduced the expression of all monitored cytokines, except for transforming growth factor-β3, a molecule involved in cell differentiation and immune response.
  • Despite these encouraging findings, more research needs to be conducted to understand the clinical significance of these effects and to investigate the cause of the observed adverse reactions.

Cite This Article

APA
Mund SJK, MacPhee DJ, Campbell J, Honaramooz A, Wobeser B, Barber SM. (2021). Macroscopic, Histologic, and Immunomodulatory Response of Limb Wounds Following Intravenous Allogeneic Cord Blood-Derived Multipotent Mesenchymal Stromal Cell Therapy in Horses. Cells, 10(11). https://doi.org/10.3390/cells10112972

Publication

ISSN: 2073-4409
NlmUniqueID: 101600052
Country: Switzerland
Language: English
Volume: 10
Issue: 11

Researcher Affiliations

Mund, Suzanne J K
  • Department of Large Animal Clinical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, SK S7N 5B4, Canada.
MacPhee, Daniel J
  • Department of Veterinary Biomedical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, SK S7N 5B4, Canada.
Campbell, John
  • Department of Large Animal Clinical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, SK S7N 5B4, Canada.
Honaramooz, Ali
  • Department of Veterinary Biomedical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, SK S7N 5B4, Canada.
Wobeser, Bruce
  • Department of Veterinary Pathology, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, SK S7N 5B4, Canada.
Barber, Spencer M
  • Department of Large Animal Clinical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, SK S7N 5B4, Canada.

MeSH Terms

  • Administration, Intravenous
  • Animals
  • Cytokines / genetics
  • Cytokines / metabolism
  • Epithelium / pathology
  • Extremities / pathology
  • Female
  • Fetal Blood / cytology
  • Gene Expression Regulation
  • Horses
  • Immunomodulation
  • Mesenchymal Stem Cell Transplantation / veterinary
  • Mesenchymal Stem Cells / cytology
  • RNA, Messenger / genetics
  • RNA, Messenger / metabolism
  • Transplantation, Homologous
  • Wound Healing
  • Wounds and Injuries / immunology
  • Wounds and Injuries / pathology

Grant Funding

  • 417817 / Mark and Pat DuMont Equine Orthopedic Fund
  • 417560 / Townsend Equine Health Research Fund
  • 418751 / Townsend Equine Health Research Fund

Conflict of Interest Statement

The authors declare no conflict of interest related to this report. The funders had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript, or in the decision to publish the results.

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