Figure 2From: Ultrasound-targeted microbubble destruction mediated herpes simplex virus-thymidine kinase gene treats hepatoma in miceApoptosis expression in four groups of mice liver cancer tissues (original magification × 400). Terminal deoxyuridine nick end-labeling results showed that cells stained brown in nuclei were apoptotic cells. The tumor cells in two groups appear apoptosis in varying degree. (a. HSV-TK+US group, b. HSV-TK+US+MB).Back to article page