Effect of radiation on tumor cell migration as assessed by the Boyden chamber migration assay.

<p>Representative images are shown of migrating C6 glioma cells exposed to conditioned medium from cultures of <b>A</b>. unirradiated or heavy ion-irradiated, or <b>B</b>. unirradiated or X-ray-irradiated glioma cells. <b>C</b>. Quantification of the number of migratory glioma cells is expressed as means ± standard error of the mean from three independent experiments, in which treatments were performed in triplicate.*P<0.05, ***P<0.001 vs. controls (0 Gy).