Allograft integration in a rabbit transgenic model for anterior cruciate ligament reconstruction

Orthopaedics & Traumatology, Surgery & Research : OTSR
Manon BachyDidier Hannouche

Abstract

Tissue engineering strategies include both cell-based and cell homing therapies. Ligamentous tissues are highly specialized and constitute vital components of the musculoskeletal system. Their damage causes significant morbidity and loss in function. The aim of this study is to analyze tendinous graft integration, cell repopulation and ligamentization by using GFP+/- allografts in GFP+/- transgenic New Zealand white (NZW) rabbits. Graft implantation was designed to closely mimic anterior cruciate ligament (ACL) repair surgery. Allografts were implanted in 8 NZW rabbits and assessed at 5 days, 3 weeks and 6 weeks through: (1) arthroCT imaging, (2) morphological analysis of the transplanted allograft, (3) histological analysis, (4) collagen type I immunochemistry, and (5) GFP cell tracking. Collagen remodeling was appreciated at 3 and 6 weeks. Graft repopulation with host cells, chondrocyte-like cells at the tendon-bone interface and graft corticalization in the bone tunnels were noticed at 3 weeks. By contrast we noticed a central necrosis aspect in the allografts intra-articularly at 6 weeks with a cell migration towards the graft edge near the synovium. Our study has served to gain a better understanding of tendinous allograft...Continue Reading

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Citations

Oct 10, 2019·Annals of the New York Academy of Sciences·Yusuke HagiwaraNathaniel A Dyment
Sep 23, 2018·Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA·V CondelloE Kon
Jun 23, 2019·Journal of Orthopaedic Research : Official Publication of the Orthopaedic Research Society·Timur B KamalitdinovNathaniel A Dyment

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