Fig. 2

Expansion of Ir-MSCs. (a–e) BM-MSCs (lots A–E) were exposed to (Ir-MSCs, dotted lines) or not exposed to (non-Ir-MSCs, solid lines) 0.1 Gy γ-radiation on day 0. They were then cultured until confluent. The number of viable cells was counted weekly after γ-irradiation using 0.5% trypan blue. Data are mean values ± SD. n = 5 per group (a–c) or n = 3 per group (d, e). *, p < 0.05