Effects of small interfering RNA magnetic nanoparticles combination with external magnetic fields on survivin gene expression of bladder cancer cells and apoptosis / 中华外科杂志
Chinese Journal of Surgery
;
(12): 1248-1251, 2006.
Artigo
em Chinês
| WPRIM
| ID: wpr-288610
ABSTRACT
<p><b>OBJECTIVE</b>To investigate the effects of the small interfering RNA plasmid-dextran magnetic nanoparticles (siRNA-DMN) combination with external magnetic fields on silencing survivin gene expression of bladder cancer cells and apoptosis when DMN used as gene carrier to transfer siRNA-survivin recombinant plasmid in vivo.</p><p><b>METHODS</b>The siRNA-survivin recombinant plasmid specific targeted survivin was synthesized in previous experiment. DMN were prepared by chemical coprecipitation method and used as gene carrier. The siRNA-DMN were constructed by static electricity of polylysine and transferred into human bladder cancer BIU-87 cells with the help of external magnetic fields. The growth inhibiting rate (IR) of BIU-87 cells was observed by 3-[4, 5-dimethylthiazol-2-yl]-2, 5-diphenyl tetrazolium bromide's test and the apoptosis index (AI) was detected by transferase-mediated dUTP nick end labeling method. The relatively transcription levels of survivin mRNA and protein expression were respectively detected by semi-quantitive reverse transcription polymerase chain reaction and Western Blotting techniques.</p><p><b>RESULTS</b>The diameter, effective diameter and saturation magnetization of DMN-siRNA were about 10 - 12 nm, 94.8 nm and 0.19 emu/g, respectively. The IR (39.60%) and AI (28.72%), the relative expression of survivin mRNA and protein of siRNA-DMN combination with external magnetic fields on BIU-87 cells were significantly higher and lower than those in the control group and single siRNA-DMN group, respectively (P < 0.05).</p><p><b>CONCLUSIONS</b>The siRNA-survivin plasmid-DMN combination with external magnetic fields could effectively inhibit survivin expression and induce BIU-87 cells apoptosis which provided experimental basis for the magnetic targeting gene therapy of bladder tumor.</p>
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Patologia
/
Farmacologia
/
Plasmídeos
/
Terapêutica
/
Neoplasias da Bexiga Urinária
/
RNA Mensageiro
/
Transfecção
/
Regulação Neoplásica da Expressão Gênica
/
Apoptose
/
RNA Interferente Pequeno
Limite:
Humanos
Idioma:
Chinês
Revista:
Chinese Journal of Surgery
Ano de publicação:
2006
Tipo de documento:
Artigo
Similares
MEDLINE
...
LILACS
LIS