Inhibitory effect of NF-kappaB p65siRNA on human laryngeal carcinoma xenograft model in nude mice / 临床耳鼻咽喉头颈外科杂志

ABSTRACT

OBJECTIVE@#To investigate the inhibitory effect of NF-kappaB p65siRNA on human laryngeal carcinoma xenograft model in nude mice.@*METHOD@#Human laryngeal carcinoma cell line Hep-2 was seeded in the subcutaneous layer of 15 nude mice to build laryngeal carcinoma xenograft model. Then they were randomly divided into three groups. NF-kappaB p65siRNA was given in siRNA group and FAM-Control siRNA was given in negative control group while phosphoric-buffered saline (PBS) was used in normal control group for 3 weeks. Tumor size and body weight of the mice were measured. TUNEL method and immunohistochemical S-P method were used for detecting the expression of NF-kappaB p65 and Bcl-xL protein.@*RESULT@#The volume of tumors in siRNA group was reduced and the average weight of tumors in siRNA group was lower than the other two groups (P < 0.05). In siRNA group, the expression of NF-kappaB p65 and Bcl-xL protein was down-regulated and the apoptotic rate was increased obviously as compared with the negative control group and the normal control group.@*CONCLUSION@#NF-kappaB p65siRNA can significantly inhibit the expression of NF-kappaB p65 and the growth of human laryngeal carcinoma xenograft in nude mice. Its mechanism may be related to inducing the apoptosis in tumor cells by down-regulating the expression of Bcl-xL protein.