Fig. 6

Comparison of β-GAL expression and proliferation capacity of SHED and TERT-SHED at different passages. a TERT-SHED showed low β-GAL expression at a late passage (40th passage; P40), whereas SHED P20 showed senescence as indicated by remarkably high β-GAL expression. b TERT-SHED at late passages (20th and 40th passages; P20 and P40) showed a significantly stronger capacity for proliferation than SHED at the fourth passage (P4). *P < 0.05. OD optical density, SHED stem cells from human exfoliated deciduous teeth, TERT telomerase reverse transcriptase