ArticlebioRxiv : the preprint server for biology2026
Bioorthogonal Tuning of Hydrogel Stiffness Promotes Zonal Redifferentiation of Passaged Chondrocytes.
Article in bioRxiv : the preprint server for biology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Generating bioengineered cartilage that recapitulates the depth-dependent phenotype, structure, and function of native articular cartilage remains a challenge. While cartilage is rich in aggrecan and type II collagen, proper function depends on depth-dependent protein expression. Superficial zone chondrocytes (SZCs) secrete proteoglycan-4 (PRG4) to lubricate the cartilage surface. Deep zone chondrocytes produce type X collagen (COLX) to support compressive loading and load transfer to subchondral bone. We previously demonstrated that passaged full-thickness chondrocytes (FTCs) and zonal chondrocytes can re-express cartilage and zone-specific markers following scaffold-free three-dimensional (3D) culture in redifferentiation media. However, in the absence of an instructive matrix, cells expressed low levels of zone-specific proteins and exhibited limited depth-dependent organization.
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