Attenuated Salmonella carrying pGRIM-19-si-survivin co-expression plas-mid inhibits growth of prostate cancer subcutaneous xenografts in vivo
10.3969/j.issn.1000-4718.2014.06.001
- VernacularTitle:携带 pGRIM-19-si-survivin 共表达质粒的减毒沙门菌对前列腺癌移植瘤的体内抑制作用
- Author:
Xiaohui ZHAO
;
Lili LU
;
He GE
;
Bing LI
;
Xuejian ZHAO
;
Yanbo LIU
- Publication Type:Journal Article
- Keywords:
RNA interference;
Survivin;
GRIM-19;
Prostatic neoplasms;
Attenuated Salmonella
- From:
Chinese Journal of Pathophysiology
2014;(6):961-967
- CountryChina
- Language:Chinese
-
Abstract:
AIM:To explore the effects of pGRIM-19-si-survivin co-expression plasmid carried by human at-tenuated Salmonella on prostate cancer subcutaneous xenograft growth in nude mice .METHODS: Prostate cancer xeno-graft model was established in nude mice .Co-expression plasmids carried by attenuated Salmonella were introduced by in-traperitoneal injection .The xenograft volumes were monitored timely .Immunohistochemical staining , RT-PCR and TUNEL assay were applied to investigate the related mechanisms that pGRIM-19-si-survivin inhibited tumor growth in vivo.RE-SULTS:Compared with psi-survivin and pGRIM-19 carried by attenuated Salmonella ( control groups ) , the tumor volumes were reduced markedly in pGRIM-19-si-survivin plasmid group .The mean shrinkage rates were 2.36 and 3.02 times. pGRIM-19-si-survivin co-expression plasmid carried by attenuated Salmonella inhibited survivin expression but strengthened GRIM-19 expression obviously (P<0.05).The mRNA expression of apoptosis-related proteins such as Bcl-xL, Stat3, cy-clin D1 and c-Myc was inhibited , and the vascular endothelial growth factor ( VEGF) mRNA and Ki67 protein were also in-hibited, but the caspase-3 mRNA expression was up-regulated ( P<0.05 ) with significant cell apoptosis .CONCLU-SION:pGRIM-19-si-survivin co-expression plasmid carried by human attenuated Salmonella inhibits the growth of prostate cancer subcutaneous xenografts in nude mice by promoting cell apoptosis and inhibiting prostatic cancer proliferation .
