Screening and identification of proteins related to gastric cancer metastasis with comparative proteomics / 南方医科大学学报
Journal of Southern Medical University
;
(12): 360-364, 2015.
Artigo
em Chinês
| WPRIM
| ID: wpr-239177
ABSTRACT
<p><b>OBJECTIVE</b>To screen and identify the proteins related with tumor metastasis of gastric cancer in a nude mouse model bearing orthotopic transplanted tumor.</p><p><b>METHODS</b>Zinc finger protein 139 (ZNF139)-specific siRNA was synthesized and transfected into gastric cancer cell line SGC7901, which was then screened by G418. ZNF139-siRNA-transfected cells, negative plasmid-transfected cells and untreated SGC7901 cells were orthotopically transplanted separately on the stomach wall of BALB/c nude mice. The primary tumors and metastatic lymph nodes were harvested to separate the proteins by 2-D fluorescence difference gel electrophoresis (2-D DIGE); after gel digestion, the differential proteins were subjected to liquid chromatography-mass spectrometry (LC-MS) for identification and their functions were analyzed. Western blotting was performed to verify the identified proteins.</p><p><b>RESULTS</b>ZNF139 expression was effectively inhibited in siRNA-transfected SGC7901 cells. ZNF139-siRNA-transfected cells showed obviously suppressed tumor growth with a lowered lymph node metastasis rate in nude mice compared with untreated cells and the negative control cells (P<0.05). Proteomic study with 2-D DIGE showed that fascin and hnRNPA2/B1 were down-regulated while ANXA1 was up-regulated in the primary tumors, and ANXA5 was down-regulated in the metastatic lymph nodes in ZNF139-siRNA-transfected group. Western blotting confirmed the results of proteomic analysis.</p><p><b>CONCLUSION</b>ZNF139 gene may promote lymph node metastasis of gastric cancer by regulating fascin, hnRNPA2/B1, ANXA1, and ANXA5.</p>
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Patologia
/
Neoplasias Gástricas
/
Transfecção
/
Eletroforese em Gel Bidimensional
/
Western Blotting
/
Cromatografia Líquida
/
Anexinas
/
Ribonucleoproteínas Nucleares Heterogêneas Grupo A-B
/
RNA Interferente Pequeno
/
Proteômica
Tipo de estudo:
Estudo diagnóstico
/
Estudo prognóstico
/
Estudo de rastreamento
Limite:
Animais
/
Humanos
Idioma:
Chinês
Revista:
Journal of Southern Medical University
Ano de publicação:
2015
Tipo de documento:
Artigo
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