The regenerative potential of young versus senescent rabbit adipose-derived mesenchymal stem cells and their impact on the treatment of intervertebral disc degeneration.

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)

Background context Implantation of mesenchymal stem cells (MSCs) appears to be a promising choice for intervertebral disc (IVD) regeneration. Among MSCs, adipose-derived MSCs (ADSCs) have shown stronger differentiation ability towards a nucleus pulposus (NP)-like phenotype. Purpose The aim of the current study was to assess the IVD regenerative potential of rabbit ADSCs (rADSCs) in vitro and in vivo. Given that preceding propagation by serial in vitro subculturing is often required to achieve high numbers of viable cells necessary for tissue regeneration applications (which could result in senescence induction), we explored the effect of senescence on rADCSs' molecular profile and function in vitro, as well as its direct effect on the final outcome of IVD tissue quality for the first time, when injected intradiscally in a rabbit model. Study design The molecular profile of isolated young and senescent rADSCs was assessed in vitro, before their delivery into rabbit lumbar IVDs to explore differences regarding their effect on IVD tissue quality. Methods Alcian Blue, Oil Red O and Alizarin Red S staining procedures were performed for the in vitro determination of young and senescent rADSCs' chondrogenic, adipogenic and osteogenic capacity, respectively. Assessment of rADSCs' viability, cell cycle progression and activation of selected biochemical pathways after hyperosmotic treatm

Evidence level

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

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