title: Evaluation of mesenchymal stem cell migration after equine tendonitis therapy.
abstract: BACKGROUND
  Mesenchymal stem cells (MSCs) have been used to treat equine tendonitis with promising results; however, little is known about the potential migration of these cells.
  
  
  OBJECTIVE
  To assess the possible migration of MSCs from an implantation site in the superficial digital flexor tendon (SDFT) to a lesion in the SDFT of the contralateral limb.
  
  
  METHODS
  In vivo experimental study.
  
  
  METHODS
  Adipose-derived MSCs were isolated from 4 healthy horses. Lesions were induced in the SDFTs of both forelimbs, followed by intralesional implantation of autologous adipose-derived MSCs labelled with nanocrystals into one of the limbs. Flow cytometry of the peripheral blood mononuclear cells and fluorescence microscopy of biopsies of the SDFT lesions were used to search for the labelled cells.
  
  
  RESULTS
  Labelled cells were detected among the peripheral blood mononuclear cells in all animals, but labelled cells were present only in the SDFTs that were treated with the intralesional implants.
  
  
  CONCLUSIONS
  Nanocrystals were a valuable in vivo marker of MSCs to be used for tendonitis treatment. Although migration of MSCs to the bloodstream was observed, it was not possible to identify the labelled cells in the untreated tendons.
authors.affiliation: UNESP - São Paulo State University, School of Veterinary Medicine and Animal Science, Botucatu, Brazil.
authors.forename: A M
authors.initials: AM
authors.lastname: Carvalho
authors.forename: A L M
authors.initials: AL
authors.lastname: Yamada
authors.forename: M A
authors.initials: MA
authors.lastname: Golim
authors.forename: L E C
authors.initials: LE
authors.lastname: Álvarez
authors.forename: C A
authors.initials: CA
authors.lastname: Hussni
authors.forename: A L G
authors.initials: AL
authors.lastname: Alves
mesh_terms: D000273:Adipose Tissue / Q000166:cytology; D000818:Animals; D002465:Cell Movement / Q000502:physiology*; D002478:Cells, Cultured; D005260:Female; D006734:Horse Diseases / Q000628:therapy*; D006736:Horses; D008297:Male; D045164:Mesenchymal Stem Cell Transplantation / Q000662:veterinary*; D059630:Mesenchymal Stem Cells / Q000166:cytology / Q000502:physiology*; D052256:Tendinopathy / Q000628:therapy / Q000662:veterinary*
keywords: horse; mesenchymal stem cell; migration; nanocrystal; tendonitis