Fig. 4From: In the presence of TGF-β1, Asperosaponin VI promotes human mesenchymal stem cell differentiation into nucleus pulposus like- cellsThe expression levels of aggrecan and PAX1 genes were verified by immunostaining. The immunofluorescence signals were stronger (green staining) in the experimentally treated cells than in the controls (scale bar: 200 μm)Back to article page