FIG. 4.

(a) Fluorescence photomicrographs of live (FDA, green) and dead (EB, orange-red) encapsulated hMSCs cultured in vitro in the photocrosslinked ALG and ACR-RGD-ALG hydrogels after 14 and 28 days. The scale bar indicates 200 μm and all photographs were taken at the same magnification. (b) DNA content in the hMSC/hydrogel constructs normalized to dry weight.*p<0.05 compared to 7 days. ^#p<0.05 compared to all ACR-RGD-ALG hydrogels at 14 days. **p<0.05 compared to ACR-RGD-ALG (10 and 20 mg) at 21 days. Values represent mean±standard deviation (N=6–10). Color images available online at www.liebertpub.com/tea