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 6 Detection of p-STAT3 protein expression by immunohistochemical assay of tumor tissues in nude mice in different treated groups (streptavidin biotin complex, × 400). A: Mock-treated group; B: pSH1Si-Scramble group; C: pSH1Si-STAT3 group. Black arrows point to positive cells, which were stained brown in the nucleus, using antibodies to p-STAT3.