Cell-imprinted substrates as biomimetic platforms for osteoarthritis modeling with mesenchymal stem cells

Evidence from laboratory and animal studies provides groundwork for understanding mechanisms and potential before human studies continue.

• Level A · Stronger Clinical Evidence
• Level B · Emerging clinical evidence with positive signals
• Level C · Early human research exploring benefits
• Level D · Scientific groundwork from lab and animal studies
• Emerging · Emerging topic under active research

Abstract (original English)

Introduction The objective of this study is twofold: first, to investigate the relationship between chondrocyte morphology and their own gene and protein expression profiles in healthy and osteoarthritic (OA) cartilage; and second, to assess whether replicating the morphology of OA chondrocytes (OACs) can induce a hypertrophic expression pattern in MSCs. Methods Polydimethylsiloxane (PDMS) substrates were fabricated to replicate the morphologies of human OACs and healthy chondrocytes (HCs). MSCs were cultured on these imprinted substrates, and differentiation was assessed using real-time PCR, immunocytochemistry, Alcian blue/Safranin O staining, and scanning electron microscopy (SEM). Results SEM and optical microscopy revealed that OACs had a larger surface area than HCs. Real-time PCR analysis showed morphology-dependent variations in the expression of cartilage- and OA-related markers, with statistically significant differences observed only for SOX9 . Immunofluorescence analysis of collagen types I and II supported these findings, though visual inspection of the staining did not indicate any significant changes. Conclusion The results show that OACs-imprinted substrates can be effectively combined with other methods to improve in vitro models of OA. This offers a useful tool for exploring disease mechanisms and potential therapies.

Evidence level

Evidence from laboratory and animal studies provides groundwork for understanding mechanisms and potential before human studies continue.

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