Figure 2. MRI and histopathologic assessment of HNSCC response to combination treatment.
(A) Panel of images represent axial T2-weighted images of mice showing subcutaneous FaDu tumors from control, VDA alone (DMXAA 25 mg/kg, i.p.), chemotherapy alone (CPT-11 50 mg/kg, i.p.) and combination groups (n=6 tumors per group). Images were acquired 48 hours post 2nd dose of treatment. (B) Bar graph shows tumor volumes calculated from multislice T2-weighted images of animals in all four groups (*p<0.05, ***p<0.001). (C) Panel of images represents photomicrographs of hematoxylin & eosin (H&E) and Ki67 stained sections of tumors from control and treatment groups (n = 3 per group). Whole tumor sections are also shown adjacent to the 10x magnified images. Quantitative estimates of necrosis (D) and Ki67 staining (E) showed increased necrosis and decreased in tumor proliferation following combination treatment compared to controls and either monotherapy (*p<0.05, **p<0.01***p<0.001).


