Table 4.

Relative numbers [% of the control value] of the pulmonary L1 sarcoma or Lewis Lung Carcinoma cell colonies in BALB/c or C57BL/6 mice, respectively, exposed to repeated WBI at 0.01. 0.02. and 0.1 Gy X-rays.

Group	BALB/c mice	C57BL/6 mice
Control	100.0 ± 25.0	100.0 ± 22.4
10x 0.01 Gy	60.2*± 14.4	82.5* ± 25.7
10x 0.02 Gy	50.4*± 12.9	73.9* ± 21.3
10x 0.1 Gy	54.7*± 15.1	65.9* ± 18.3

Control - sham-exposed mice; 10 × 0.01 Gy - mice exposed to ten fractions of 0.01 Gy X-rays; 10 × 0.02 Gy - mice exposed to ten fractions of 0.02 Gy X-rays; 10 × 0.1 Gy - mice exposed to ten fractions of 0.1 Gy X-rays. Mean values obtained from two independent experiments are presented; in each experiment experimental groups consisted of 24 mice each.

^*indicates statistically significant (p<0.05) difference from the control group.