Silencing of signal transducer and activator of transcription 3 expression by RNA interference suppresses growth of human hepatocellular carcinoma in tumor-bearing nude mice

Figure 8 Detection of apoptosis with TUNEL assay in tumor tissues of tumor-bearing nude mice in different treated groups (× 400). A: Mock-treated group; B: pSH1Si-Scramble group; C: pSH1Si-STAT3 group, black arrow points to positive cells, in which the nuclei were stained brown.