Potentiation of radiation-induced growth inhibition by letrozole measured by cell-count assay

<p><b>Copyright information:</b></p><p>Taken from "Letrozole sensitizes breast cancer cells to ionizing radiation"</p><p>Breast Cancer Research 2004;7(1):R156-R163.</p><p>Published online 7 Dec 2004</p><p>PMCID:PMC1064115.</p><p>Copyright © 2004 Azria et al., licensee BioMed Central Ltd.</p> Growth of MCF-7CA cells, measured for 18 days after treatment, was inhibited to a 76% greater extent with letrozole plus 4 Gy radiation after 12 days, and to an 85% greater extent after 18 days, compared with radiation alone. Solid lines, ■ and ◆ represent radiation alone at 2 Gy and 4 Gy, respectively; dotted lines, ■ and ◆ represent combination of radiation plus letrozole (0.7 μM) at 2 Gy and 4 Gy, respectively

Potentiation of radiation-induced growth inhibition by letrozole measured by clonogenic assay

<p><b>Copyright information:</b></p><p>Taken from "Letrozole sensitizes breast cancer cells to ionizing radiation"</p><p>Breast Cancer Research 2004;7(1):R156-R163.</p><p>Published online 7 Dec 2004</p><p>PMCID:PMC1064115.</p><p>Copyright © 2004 Azria et al., licensee BioMed Central Ltd.</p> With radiation alone the MCF-7CA cell survival fraction decreased in a dose-dependent manner, which was significantly potentiated by the addition of 0.7 μM letrozole. For 2 Gy radiation, the surviving fraction was 0.66 with radiation alone and was 0.46 with the addition of letrozole (= 0.02). For 3 Gy radiation, the corresponding surviving fractions were 0.4 and 0.18, respectively (= 0.02)

Potentiation of radiation-induced growth inhibition by letrozole measured by the MTT assay

<p><b>Copyright information:</b></p><p>Taken from "Letrozole sensitizes breast cancer cells to ionizing radiation"</p><p>Breast Cancer Research 2004;7(1):R156-R163.</p><p>Published online 7 Dec 2004</p><p>PMCID:PMC1064115.</p><p>Copyright © 2004 Azria et al., licensee BioMed Central Ltd.</p> Growth of MCF-7CA cells, measured 6 days after treatment, was inhibited to a 40% greater extent with letrozole plus 2 Gy radiation, and to a 76% greater extent with letrozole plus 4 Gy radiation, compared with radiation alone