Meniscus-Derived Matrix Scaffolds Promote the Integrative Repair of Meniscal Defects.
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Meniscal tears have a poor healing capacity, and damage to the meniscus is associated with significant pain, disability, and progressive degenerative changes in the knee joint that lead to osteoarthritis. Therefore, strategies to promote meniscus repair and improve meniscus function are needed. The objective of this study was to generate porcine meniscus-derived matrix (MDM) scaffolds and test their effectiveness in promoting meniscus repair via migration of endogenous meniscus cells from the surrounding meniscus or exogenously seeded human bone marrow-derived mesenchymal stem cells (MSCs). Both endogenous meniscal cells and MSCs infiltrated the MDM scaffolds. In the absence of exogenous cells, the 8% MDM scaffolds promoted the integrative repair of an in vitro meniscal defect. Dehydrothermal crosslinking and concentration of the MDM influenced the biochemical content and shear strength of repair, demonstrating that the MDM can be tailored to promote tissue repair. These findings indicate that native meniscus cells can enhance meniscus healing if a scaffold is provided that promotes cellular infiltration and tissue growth. The high affinity of cells for the MDM and the ability to remodel the scaffold reveals the potential of MDM to integrate with native meniscal tissue to promote long-term repair without necessarily requiring exogenous cells.
Published Version (Please cite this version)10.1038/s41598-019-44855-3
Publication InfoWeinberg, Joe; McNulty, Amy; Ruprecht, Jacob C; Waanders, Taylor D; Rowland, Christopher R; Nishimuta, James F; ... Guilak, Farshid (2019). Meniscus-Derived Matrix Scaffolds Promote the Integrative Repair of Meniscal Defects. Scientific reports, 9(1). pp. 8719. 10.1038/s41598-019-44855-3. Retrieved from https://hdl.handle.net/10161/19046.
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Associate Professor in Orthopaedic Surgery
The long term goals of the McNulty lab are to develop strategies to prevent osteoarthritis and to promote tissue repair and regeneration following joint injury. In order to achieve these goals, we need to understand the mechanisms necessary for tissue repair and regeneration and how they are altered with aging and joint injury. Specifically, we are working to enhance the integrative repair of meniscus to restore meniscal function and decrease the risk of osteoarthritis development. &
Professor of Medicine
Dr. Weinberg is a board-certified hematologist and medical oncologist who serves as Professor of Medicine and Immunology and Associate Professor of Obstetrics and Gynecology at the Duke University Medical Center, and staff physician in hematology-oncology at the Durham V.A. Medical Center. His clinical interests are in hematology and oncology, and his research focuses on blood cells, nitric oxide (NO), and leukemia. The work includes studies of resistance to infection, pathways of inflamm
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