Fig. 6

Tumorigenicity evaluation of canine AD-MSCs in passage 5. a No tumor formation was observed in the AD-MSCs group within 40 d after subcutaneous injection in mice (arrow: visible tumor in Hela cells group). b Histopathological examination of hematoxylin and eosin staining in injection sites. No cell mass formation was observed in the AD-MSCs group. However, the HeLa cells injection site showed a subcutaneous mass. Scale bars, 100 µm