Fig. 7

Cross section at tumor tissue. The tumor cross sections were stained with hematoxylin/eosin, and the number of the intratumor blood vessels was counted as well as extent of apoptosis/necrosis. a, b Tumor tissue excised from untreated animals, the pictures were captured at 4 × and 20 × magnifications, respectively. The extents of the apoptotic/necrotic areas were less than in the treated groups. c Tissue excised from animals treated with MBA 200 mg/kg (at 10x). d Tumor specimen from animals treated with 400 mg/kg (at 10 x). (V) refers to viable tumor cells, and (N) refers to necrotic/apoptotic tumor cells