Tissues from equine cadaver ligaments up to 72 hours of post-mortem: a promising reservoir of stem cells

Stem Cell Research & Therapy

Nadine Antoine²  Etienne Baise⁵  Delphine Connan⁴  Céline Tonus¹  Olivier Waroux²  Joëlle Piret²  Annick Gabriel³  Mohamad Khir Shikh Alsook³ 

[1] Embryology Unit, FARAH Research Center & Faculty of Veterinary Medicine, University of Liège, Liège, Belgium;Histology Unit, FARAH Research Center & Faculty of Veterinary Medicine, University of Liège, Liège, Belgium;Anatomy Unit, FARAH Research Center & Faculty of Veterinary Medicine, University of Liège, Liège, Belgium;Embryology Unit, GIGA-Development, Stem Cells and Regenerative Medicine and Faculty of Veterinary Medicine, University of Liège, Liège, Belgium;FARAH Research Center & Faculty of Veterinary Medicine, University of Liège, Liège, Belgium

关键词: TEM;    GFAP;    TUJ-1;    SSEA-1;    OCT-4;    Mesenchymal stem cells;    Ligament;    Cadaver;    Equine;   

Others  :  1235193
DOI  :  10.1186/s13287-015-0250-7

 received in 2015-07-25, accepted in 2015-12-01,  发布年份 2015

【 摘 要 】

Background

Mesenchymal stem cells (MSCs) harvested from cadaveric tissues represent a promising approach for regenerative medicine. To date, no study has investigated whether viable MSCs could survive in cadaveric tissues from tendon or ligament up to 72 hours of post-mortem. The purpose of the present work was to find out if viable MSCs could survive in cadaveric tissues from adult equine ligaments up to 72 hours of post-mortem, and to assess their ability (i) to remain in an undifferentiated state and (ii) to divide and proliferate in the absence of any specific stimulus.

Methods

MSCs were isolated from equine cadaver (EC) suspensory ligaments within 48–72 hours of post-mortem. They were evaluated for viability, proliferation, capacity for tri-lineage differentiation, expression of cell surface markers (CD90, CD105, CD73, CD45), pluripotent transcription factor (OCT-4), stage-specific embryonic antigen-1 (SSEA-1), neuron-specific class III beta-tubulin (TUJ-1), and glial fibrillary acidic protein (GFAP). As well, they were characterized by transmission electron microscope (TEM).

Results

EC-MSCs were successfully isolated and maintained for 20 passages with high cell viability and proliferation. Phase contrast microscopy revealed that cells with fibroblast-like appearance were predominant in the culture. Differentiation assays proved that EC-MSCs are able to differentiate towards mesodermal lineages (osteogenic, adipogenic, chondrogenic). Flow cytometry analysis demonstrated that EC-MSCs expressed CD90, CD105, and CD73, while being negative for the leukocyte common antigen CD45. Immunofluorescence analysis showed a high percentage of positive cells for OCT-4 and SSEA-1. Surprisingly, in absence of any stimuli, some adherent cells closely resembling neuronal and glial morphology were also observed. Interestingly, our results revealed that approximately 15 % of the cell populations were TUJ-1 positive, whereas GFAP expression was detected in only a few cells. Furthermore, TEM analysis confirmed the stemness of EC-MSCs and identified some cells with a typical neuronal morphology.

Conclusions

Our findings raise the prospect that the tissues harvested from equine ligaments up to 72 hours of post-mortem represent an available reservoir of specific stem cells. EC-MSCs could be a promising alternative source for tissue engineering and stem cell therapy in equine medicine.

【 授权许可】

   
2015 Shikh Alsook et al.

【 图 表 】

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