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Synovial fibroblasts support vascular function in an acute injury-on-a-chip model | bioRxiv

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Most patients who sustain an acute joint injury develop degenerative joint disease, or osteoarthritis (OA). Animal models have informed the design of OA therapeutics; however, no disease-modifying therapy has successfully translated to human patients. Thus, there is a strong motivation to develop humanized in vitro platforms to fill a critical gap in knowledge of disease progression post-injury. Here, we develop an acute injury-on-a-chip model of the synovium, a vascularized, joint-lining tissue that has been implicated in OA progression and as a key driver of joint disease. We apply this chip-based system to investigate crosstalk between endothelial cells, lining an engineered vessel, and synovial fibroblasts, embedded within an extracellular matrix hydrogel. Our data indicate that synovial fibroblasts, rather than initiating disease, attempt to support and maintain vascular function in the presence of acute inflammation (i.e., interleukin-1β). Such knowledge may provide new targets f

New Results , Declan N. Goddard, Christopher J. Calo, View ORCID ProfileAbhishek P. Dhand, Matthew D. Davidson, Aina Solsona-Pujol, View ORCID ProfileHannah K. Weppner, Melissa Wong, View ORCID ProfileCarla R. Scanzello, View ORCID ProfileLaurel E. Hind, View ORCID ProfileJason A. Burdick doi: https://doi.org/10.1101/2025.07.12.664530 Abstract Most patients who sustain an acute joint injury develop degenerative joint disease, or osteoarthritis (OA). Animal models have informed the design of OA therapeutics; however, no disease-modifying therapy has successfully translated to human…

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