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Transplantation of autologous synovial mesenchymal stem cells promotes meniscus regeneration in aged primates
Author(s) -
Kondo Shimpei,
Muneta Takeshi,
Nakagawa Yusuke,
Koga Hideyuki,
Watanabe Toshifumi,
Tsuji Kunikazu,
Sotome Shinichi,
Okawa Atsushi,
Kiuchi Shinji,
Ono Hideo,
Mizuno Mitsuru,
Sekiya Ichiro
Publication year - 2017
Publication title -
journal of orthopaedic research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.041
H-Index - 155
eISSN - 1554-527X
pISSN - 0736-0266
DOI - 10.1002/jor.23211
Subject(s) - meniscus , cartilage , mesenchymal stem cell , regeneration (biology) , transplantation , medial meniscus , anatomy , medicine , fibrocartilage , knee joint , surgery , pathology , osteoarthritis , articular cartilage , biology , microbiology and biotechnology , physics , alternative medicine , incidence (geometry) , optics
Transplantation of aggregates of synovial mesenchymal stem cells (MSCs) enhanced meniscus regeneration in rats. Anatomy and biological properties of the meniscus depend on animal species. To apply this technique clinically, it is valuable to investigate the use of animals genetically close to humans. We investigated whether transplantation of aggregates of autologous synovial MSCs promoted meniscal regeneration in aged primates. Chynomolgus primates between 12 and 13 years old were used. After the anterior halves of the medial menisci in both knees were removed, an average of 14 aggregates consisting of 250,000 synovial MSCs were transplanted onto the meniscus defect. No aggregates were transplanted to the opposite knee for the control. Meniscus and articular cartilage were analyzed macroscopically, histologically, and by MRI T1rho mapping at 8 ( n = 3) and 16 weeks ( n = 4). The medial meniscus was larger and the modified Pauli's histological score for the regenerated meniscus was better in the MSC group than in the control group in each primate at 8 and 16 weeks. Mankin's score for the medial femoral condyle cartilage was better in the MSC group than in the control group in all primates at 16 weeks. T1rho value for both the regenerated meniscus and adjacent articular cartilage in the MSC group was closer to the normal meniscus than in the control group in all primates at 16 weeks. Transplantation of aggregates of autologous synovial MSCs promoted meniscus regeneration and delayed progression of degeneration of articular cartilage in aged primates. This is the first report dealing with meniscus regeneration in primates. © 2017 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 35:1274–1282, 2017.