Fig. 2.

Endothelium-dependent acetylcholine-induced vascular responses in rat thoracic aorta rings obtained from healthy (open circles) and irradiated (open squares) rats and hMSC treated non-irradiated (closed circles) and post-irradiated (closed squares) animals. hMSC were administered intravenously on the 7th day after irradiation (6 Gy). Relaxations are expressed as percentage decrease in tension evoked by 10 μM arterenol. Asterisks, P < 0.05 compared with control responses to the same ACh concentration