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Stem cell reviews and reports2015; 12(2); 245-256; doi: 10.1007/s12015-015-9638-0

Canine and Equine Mesenchymal Stem Cells Grown in Serum Free Media Have Altered Immunophenotype.

Abstract: Mesenchymal stem cell (MSC) therapy is being increasingly used to treat dogs and horses with naturally-occurring diseases. However these animals also serve as critical large animal models for ongoing translation of cell therapy products to the human market. MSC manufacture for clinical use mandates improvement in cell culture systems to meet demands for higher MSC numbers and removal of xeno-proteins (i.e. fetal bovine serum, FBS). While serum-free media (SFM) is commercially available, its affects on MSC phenotype and immunomodulatory functions are not fully known. The objective of this study was to determine if specific MSC culture conditions, MSC expansion in HYPERFlasks® or MSC expansion in a commercially available SFM, would alter MSC proliferation, phenotype or immunomodulatory properties in vitro. MSCs cultured in HYPERFlasks® were similar in phenotype, proliferative capacity and immunomodulatory functions to MSCs grown in standard flasks however MSC yield was markedly increased. HYPERFlasks® therefore provide a viable option to generate greater cell numbers in a streamlined manner. Canine and equine MSCs expanded in SFM displayed similar proliferation, surface phenotype and inhibitory effect on lymphocyte proliferation in vitro. However, MSCs cultured in the absence of FBS secreted significantly less PGE2, and were significantly less able to inhibit IFNγ secretion by activated T-cells. Immunomodulatory functions altered by expansion in SFM were species dependent. Unlike equine MSCs, in canine adipose-derived MSCs, the inhibition of lymphocyte proliferation was not principally modulated by PGE2. The removal of FBS from both canine and equine MSC culture systems resulted in altered immunomodulatory properties in vitro and warrants further investigation prior to moving towards FBS-free culture conditions.
Publication Date: 2015-12-08 PubMed ID: 26638159PubMed Central: PMC4841858DOI: 10.1007/s12015-015-9638-0Google Scholar: Lookup
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  • Journal Article

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 research paper discusses the impacts of serum-free media (SFM) on the proliferation, phenotype and immunomodulatory properties of Mesenchymal stem cell (MSC) therapy in dogs and horses. It suggests that while SFM increases cell numbers and eliminates foreign proteins, it may result in inconsistent immunomodulatory functions, which call for further examination before adopting FBS-free culture conditions.

Objective of the Study

  • The research tries to establish if altering specific MSC culture conditions, like their expansion in HYPERFlasks® or different commercially available SFM, will affect their rate of growth, phenotype or immunomodulatory properties. It primarily focuses on the impact of using SFM when culturing MSCs for therapeutic use in canines and equines.

Findings on HYPERFlasks® and Serum-Free Media (SFM)

  • MSCs grown in HYPERFlasks® demonstrated comparable phenotype, proliferative capacity and immunomodulatory functions to those grown in standard flasks, but with a significant increase in cell yield. Therefore, HYPERFlasks® appear to be a viable option to boost MSC numbers in a standardized manner.
  • MSCs cultured in SFM showed similar growth rates, surface phenotype, and inhibitory effects on lymphocyte proliferation, much like the ones grown in the presence of fetal bovine serum (FBS).

Difference in PGE2 Secretion and Inhibition of IFNγ Secretion

  • However, a key variance is found in the degree of PGE2 (prostaglandin E2) secretion and the inhibition of IFNγ (Interferon gamma) secretion by T-cells. MSCs cultured in SFM, compared to those grown with FBS, secreted significantly less PGE2, a lipid compound with immunomodulatory functions, and were less able to hinder IFNγ secretion by activated T-cells.

Species-Specific Differences

  • The observed changes in immunomodulatory functions were dependent on species. Canine adipose-derived MSCs showed a less reliant behaviour on PGE2 for the inhibition of lymphocyte proliferation compared to equine MSCs.

Implication of Findings

  • The study concludes that removing FBS from canine and equine MSC culture systems brings about alterations in their immunomodulatory properties in vitro. This necessitates further research before transitioning entirely to FBS-free culture conditions for MSC growth.

Cite This Article

APA
Clark KC, Kol A, Shahbenderian S, Granick JL, Walker NJ, Borjesson DL. (2015). Canine and Equine Mesenchymal Stem Cells Grown in Serum Free Media Have Altered Immunophenotype. Stem Cell Rev Rep, 12(2), 245-256. https://doi.org/10.1007/s12015-015-9638-0

Publication

ISSN: 2629-3277
NlmUniqueID: 101752767
Country: United States
Language: English
Volume: 12
Issue: 2
Pages: 245-256

Researcher Affiliations

Clark, Kaitlin C
  • Veterinary Clinical Sciences Department, University of Minnesota, Saint Paul, MN, 55108, USA.
Kol, Amir
  • Veterinary Clinical Sciences Department, University of Minnesota, Saint Paul, MN, 55108, USA.
Shahbenderian, Salpi
  • Veterinary Clinical Sciences Department, University of Minnesota, Saint Paul, MN, 55108, USA.
Granick, Jennifer L
  • Veterinary Clinical Sciences Department, University of Minnesota, Saint Paul, MN, 55108, USA.
Walker, Naomi J
  • Veterinary Clinical Sciences Department, University of Minnesota, Saint Paul, MN, 55108, USA.
Borjesson, Dori L
  • Veterinary Clinical Sciences Department, University of Minnesota, Saint Paul, MN, 55108, USA. dlborjesson@ucdavis.edu.

MeSH Terms

  • Adipose Tissue / cytology
  • Adipose Tissue / metabolism
  • Animals
  • Cell Culture Techniques / methods
  • Cell Differentiation / physiology
  • Cell Proliferation / physiology
  • Cell- and Tissue-Based Therapy / methods
  • Cells, Cultured
  • Culture Media, Serum-Free / metabolism
  • Dogs
  • Horses
  • Immunophenotyping / methods
  • Lymphocytes / cytology
  • Lymphocytes / metabolism
  • Mesenchymal Stem Cells / cytology

Grant Funding

  • T32 AI060555 / NIAID NIH HHS

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