title: Dose- and time-dependent effects of genipin crosslinking on cell viability and tissue mechanics - toward clinical application for tendon repair.
abstract: The crosslinking agent genipin is increasingly invoked for the mechanical augmentation of collagen tissues and implants, and has previously been demonstrated to arrest mechanical damage accumulation in various tissues. This study established an in vitro dose-response baseline for the effects of genipin treatment on tendon cells and their matrix, with a view to in vivo application to the repair of partial tendon tears. Regression models based on a broad range of experimental data were used to delineate the range of concentrations that are likely to achieve functionally effective crosslinking, and predict the corresponding degree of cell loss and diminished metabolic activity that can be expected. On these data, it was concluded that rapid mechanical augmentation of tissue properties can only be achieved by accepting some degree of cytotoxicity, yet that post-treatment cell survival may be adequate to eventually repopulate and stabilize the tissue. On this basis, development of delivery strategies and subsequent in vivo study seems warranted.
authors.affiliation: Department of Orthopedics, Balgrist University Hospital, University of Zurich, Balgrist, Forchstrasse 340, CH-8008 Zurich, Switzerland; Institute for Biomechanics, ETH Zurich, Wolfgang Paulistrasse 10, CH-8092 Zurich, Switzerland.
authors.forename: Gion
authors.initials: G
authors.lastname: Fessel
authors.affiliation: Department of Orthopedics, Balgrist University Hospital, University of Zurich, Balgrist, Forchstrasse 340, CH-8008 Zurich, Switzerland; Institute for Biomechanics, ETH Zurich, Wolfgang Paulistrasse 10, CH-8092 Zurich, Switzerland; Department of Equine Sciences, Faculty of Veterinary Medicine, University of Utrecht, Yalelaan 112, 3584 Utrecht, The Netherlands.
authors.forename: Jennifer
authors.initials: J
authors.lastname: Cadby
authors.affiliation: Department of Orthopedics, Balgrist University Hospital, University of Zurich, Balgrist, Forchstrasse 340, CH-8008 Zurich, Switzerland; Institute for Biomechanics, ETH Zurich, Wolfgang Paulistrasse 10, CH-8092 Zurich, Switzerland.
authors.forename: Stefania
authors.initials: S
authors.lastname: Wunderli
authors.affiliation: Department of Equine Sciences, Faculty of Veterinary Medicine, University of Utrecht, Yalelaan 112, 3584 Utrecht, The Netherlands.
authors.forename: René
authors.initials: R
authors.lastname: van Weeren
authors.affiliation: Department of Orthopedics, Balgrist University Hospital, University of Zurich, Balgrist, Forchstrasse 340, CH-8008 Zurich, Switzerland; Institute for Biomechanics, ETH Zurich, Wolfgang Paulistrasse 10, CH-8092 Zurich, Switzerland. Electronic address: jsnedeker@research.balgrist.ch.
authors.forename: Jess G
authors.initials: JG
authors.lastname: Snedeker
mesh_terms: D000818:Animals; D002152:Calorimetry, Differential Scanning; D002465:Cell Movement / Q000187:drug effects; D002470:Cell Survival / Q000187:drug effects; D003432:Cross-Linking Reagents / Q000494:pharmacology*; D055119:Elastic Modulus / Q000187:drug effects; D005786:Gene Expression Regulation / Q000187:drug effects; D006736:Horses; D039823:Iridoids / Q000494:pharmacology* / Q000633:toxicity; D055595:Mechanical Phenomena / Q000187:drug effects; D011489:Protein Denaturation / Q000187:drug effects; D012015:Reference Standards; D012044:Regression Analysis; D013710:Tendons / Q000187:drug effects / Q000473:pathology*; D013997:Time Factors; D014945:Wound Healing / Q000187:drug effects*
chemical_list: D003432:Cross-Linking Reagents; D039823:Iridoids; C007834:genipin
keywords: Collagen; Cytotoxicity; Tendon injury; Tendon tear; Tenocytes