Table 1. Radiosensitivity of MSC.

The table shows the percentage of cycling (Ki67+), apoptotic and senescent cells six hours after X-ray treatment (40, 160, 640 and 2000 mGy). Table reports also clonogenic property of MSC, that was evaluated 15 days post-irradiation with CFU assay. Data are expressed with standard deviation (n = 3, *p < 0.05, **p < 0.01).

	Ki67+	Apoptotic	Senescent	CFU
0 mGy	28.8 ± 4.3%	3.6 ± 0.5%	16.8 ± 2.1%	360 ± 25
40 mGy	20.3 ± 2.8%	6.9 ± 0.9% *	25.6 ± 3.2% *	218 ± 10 *
160 mGy	23.6 ± 3.3%	5.2 ± 0.7% *	31.1 ± 4.3% *	206 ± 11 *
640 mGy	19.6 ± 3.5%	6.8 ± 0.8% *	36.3 ± 4.7%**	225 ± 13 *
2000 mGy	21.9 ± 3.7%	6.8 ± 0.9% *	40.0 ± 5.6% **	100 ± 4 **