Harvested MSC-laden HA hydrogel implants after 56 days of subcutaneous implantation in nude mice. Out of 8 samples implanted per group, 1, 3 and 5 samples were recovered from the “MS-T”, “T only” and “MS+T” groups, respectively, scale bar = 2 mm (A). Immunohistochemical staining for chondroitin sulfate (CS), type II (Col 2) and type I (Col 1) collagen on paraffin sections of MSC-laden HA hydrogel constructs after 56 days of implantation, scale bar = 200 μm (B). GAG and total collagen content (C), DNA content (D) and wet weight (E) of the “T only” and “MS+T” group after 56 days of implantation. (“MS-T” was not presented due to limited number of samples recovered, *p<0.05 vs. “T only” (n=3~5)). .