Figure 2.

DT3 protected human CD34⁺ cells (in vitro) from radiation damage. DT3 (2 μM) was added 24 h before irradiation. Following irradiation (0, 2, or 4 Gy), cell expansion (A) and colony formation (B) assays were performed. Total cell numbers from each group (N=3) were counted 3 days after irradiation, and colonies were counted 14 days later. Results are from a total of three experiments and each experiment was performed in triplicate. Means±SD. *P<0.05, **P<0.01, DT3 versus control culture.