Figure 2From: An in vitrostudy investigating the survival and phenotype of mesenchymal stem cells following injection into nucleus pulposus tissueCell viability/metabolic activity of injected mesenchymal stem cells. Photomicrographs representative of caspase 3 immunopositivity and polyA-mRNA staining in mesenchymal stem cells injected into tissue explants at 48 hours, 1 week, 2 weeks and 4 weeks post injection. Scale bar = 570 μm.Back to article page