Figure 2. Deletion of Atm in endothelial cells does not affect tumor growth or vascular development of primary soft tissue sarcomas.
(A) Time for sarcomas to reach 200 mm3 after intramuscular injection of adeno-FlpO in KPFRTVAtmfl/+ and KPFRTVAtmfl/fl mice (n = 25 per group). (B) Tumor growth curves and (C) time to tripling for unirradiated sarcomas in KPFRTVAtmfl/+ and KPFRTVAtmfl/fl mice (n = 10 per group). (D and E) Immunofluorescence (D) and quantification (E) of endothelial cell marker CD31 in sarcomas from KPFRTVAtmfl/+ and KPFRTVAtmfl/fl mice (n = 10 per group). (F and G) Immunofluorescence (F) and quantification (G) of hypoxia marker EF5 in sarcomas from KPFRTVAtmfl/+ and KPFRTVAtmfl/fl mice (n = 10 per group). Regions of low and high hypoxia are shown for both genotypes. All data are mean ± SEM. Scale bars: 100 μm (D and F).