Figure 6From: IGF-1 enhances cell proliferation and survival during early differentiation of mesenchymal stem cells to neural progenitor-like cellsApoptosis assay. Immunostaining revealed that transdifferentiation is associated with apoptotic activities. (A) SYTOX Blue nuclei staining, (B) FITC-conjugated Annexin V, (C) propidium iodide (PI), and (D) overlay image. All images are viewed at 40× magnification under a confocal microscope.Back to article page