Characteristics and multipotency of equine dedifferentiated fat cells

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  • MURATA Daiki
    Department of Veterinary Clinical Science, Joint Faculty of Veterinary Medicine, Kagoshima University, Kagoshima 890-0065, Japan
  • YAMASAKI Atsushi
    Department of Veterinary Clinical Science, Joint Faculty of Veterinary Medicine, Kagoshima University, Kagoshima 890-0065, Japan
  • MATSUZAKI Shouta
    Department of Veterinary Clinical Science, Joint Faculty of Veterinary Medicine, Kagoshima University, Kagoshima 890-0065, Japan
  • SUNAGA Takafumi
    Department of Veterinary Clinical Science, Joint Faculty of Veterinary Medicine, Kagoshima University, Kagoshima 890-0065, Japan
  • FUJIKI Makoto
    Department of Veterinary Clinical Science, Joint Faculty of Veterinary Medicine, Kagoshima University, Kagoshima 890-0065, Japan
  • TOKUNAGA Satoshi
    Department of Veterinary Clinical Science, Joint Faculty of Veterinary Medicine, Kagoshima University, Kagoshima 890-0065, Japan
  • MISUMI Kazuhiro
    Department of Veterinary Clinical Science, Joint Faculty of Veterinary Medicine, Kagoshima University, Kagoshima 890-0065, Japan

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Dedifferentiated fat (DFAT) cells have been shown to be multipotent, similar to mesenchymal stem cells (MSCs). In this study, we aimed to establish and characterize equine DFAT cells. Equine adipocytes were ceiling cultured, and then dedifferentiated into DFAT cells by the seventh day of culture. The number of DFAT cells was increased to over 10 million by the fourth passage. Flow cytometry of DFAT cells showed that the cells were strongly positive for CD44, CD90, and major histocompatibility complex (MHC) class I; moderately positive for CD11a/18, CD105, and MHC class II; and negative for CD34 and CD45. Moreover, DFAT cells were positive for the expression of sex determining region Y-box 2 as a marker of multipotency. Finally, we found that DFAT cells could differentiate into osteogenic, chondrogenic, and adipogenic lineages under specific nutrient conditions. Thus, DFAT cells could have clinical applications in tissue regeneration, similar to MSCs derived from adipose tissue.

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