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Beerts C, Brondeel C, Pauwelyn G, Depuydt E, Tack L, Duchateau L, Xu Y, Saunders JH, Peremans K, Spaas JH. Scintigraphic tracking of 99mTechnetium-labelled equine peripheral blood-derived mesenchymal stem cells after intravenous, intramuscular, and subcutaneous injection in healthy dogs. Stem Cell Res Ther 2021; 12:393. [PMID: 34256833 PMCID: PMC8278733 DOI: 10.1186/s13287-021-02457-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Accepted: 06/14/2021] [Indexed: 01/02/2023] Open
Abstract
Background Mesenchymal stem cell treatments in dogs have been investigated as a potential innovative alternative to current conventional therapies for a variety of conditions. So far, the precise mode of action of the MSCs has yet to be determined. The aim of this study was to gain more insights into the pharmacokinetics of MSCs by evaluating their biodistribution in healthy dogs after different injection routes. Methods Three different studies were performed in healthy dogs to evaluate the biodistribution pattern of radiolabelled equine peripheral blood-derived mesenchymal stem cells following intravenous, intramuscular and subcutaneous administration in comparison with free 99mTechnetium. The labelling of the equine peripheral blood-derived mesenchymal stem cells was performed using stannous chloride as a reducing agent. Whole-body scans were obtained using a gamma camera during a 24-h follow-up. Results The labelling efficiency ranged between 59.58 and 83.82%. Free 99mTechnetium accumulation was predominantly observed in the stomach, thyroid, bladder and salivary glands, while following intravenous injection, the 99mTechnetium-labelled equine peripheral blood-derived mesenchymal stem cells majorly accumulated in the liver throughout the follow-up period. After intramuscular and subcutaneous injection, the injected dose percentage remained very high at the injection site. Conclusions A distinct difference was noted in the biodistribution pattern of the radiolabelled equine peripheral blood-derived mesenchymal stem cells compared to free 99mTechnetium indicating equine peripheral blood-derived mesenchymal stem cells have a specific pharmacokinetic pattern after systemic administration in healthy dogs. Furthermore, the biodistribution pattern of the used xenogeneic equine peripheral blood-derived mesenchymal stem cells appeared to be different from previously reported experiments using different sources of mesenchymal stem cells.
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Affiliation(s)
- Charlotte Beerts
- Global Stem cell Technology NV, Noorwegenstraat 4, 9940, Evergem, Belgium.,Department of Medical Imaging and Orthopedics of Domestic Animals, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820, Merelbeke, Belgium
| | - Carlien Brondeel
- Department of Medical Imaging and Orthopedics of Domestic Animals, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820, Merelbeke, Belgium
| | - Glenn Pauwelyn
- Global Stem cell Technology NV, Noorwegenstraat 4, 9940, Evergem, Belgium
| | - Eva Depuydt
- Global Stem cell Technology NV, Noorwegenstraat 4, 9940, Evergem, Belgium
| | - Liesa Tack
- Global Stem cell Technology NV, Noorwegenstraat 4, 9940, Evergem, Belgium
| | - Luc Duchateau
- Biometrics Research Center, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820, Merelbeke, Belgium
| | - Yangfeng Xu
- Department of Medical Imaging and Orthopedics of Domestic Animals, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820, Merelbeke, Belgium
| | - Jimmy H Saunders
- Department of Medical Imaging and Orthopedics of Domestic Animals, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820, Merelbeke, Belgium
| | - Kathelijne Peremans
- Department of Medical Imaging and Orthopedics of Domestic Animals, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820, Merelbeke, Belgium
| | - Jan H Spaas
- Global Stem cell Technology NV, Noorwegenstraat 4, 9940, Evergem, Belgium. .,Department of Medical Imaging and Orthopedics of Domestic Animals, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820, Merelbeke, Belgium.
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