Silencing PI3K by siRNA activated FoxO3a gene and inhibited the growth of xenografted breast carcinoma in nude mice / 肿瘤
Tumor
;
(12): 310-312, 2008.
Artigo
em Chinês
| WPRIM
| ID: wpr-849388
ABSTRACT
Objective:
To investigate the effect of silencing PI3K by small interfering RNA (siRNA) on the expression of FOXO3a in human breast cancer MCF-7 cells and the growth of xenografted breast carcinoma in nude mice.Methods:
Plasmids of siRNA for PI3K gene (Psilencer1.0-U6-PI3K) were constructed and xenografted tumor model was established in nude mice by subcutaneous inoculation of MCF-7 cells. Twenty-seven nude mice with xenografted tumor were divided randomly into 3 groups. Group 1 was intratumorally administered by Psilencer1.0-U6-PI3K plasmid. Group 2 and group 3 were intratumorally given Psilencer10-U6 plasmid and physiological saline (group 1), respectively. The tumor volume and survival time of nude mice were recorded. The expressions of PI3K and FOXO3a was measured by Western blotting.Results:
The tumor size was significantly decreased and the average survival time was significantly enlongated in Psilencer1.0-U6-PI3K-treated group (P <0.01). Western blotting analysis showed that the protein expression of PI3K in xenografted tumor was markedly decreased and FOXO3a was significantly elevated compared with control groups (P <0.05).Conclusion:
Psilencer1.0-U6-PI3K markedly silenced the expression of PI3K gene, up-regulated the expression of tumor suppressor gene FOXO3a, inhibited the growth of xenografted tumor, finally prolonged the survival time of nude mice bearing human breast carcinoma.
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Idioma:
Chinês
Revista:
Tumor
Ano de publicação:
2008
Tipo de documento:
Artigo
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