Osteopontin expression in nasopharyngeal carcinoma: its relevance to the clinical stage of the disease.
J Cancer Res Ther
; 7(2): 138-42, 2011.
Article
en En
| MEDLINE
| ID: mdl-21768699
ABSTRACT
PURPOSE:
To investigate osteopontin (OPN) expression in human nasopharyngeal carcinoma (NPC) and evaluate its clinical significance in the disease. MATERIALS ANDMETHODS:
The expression of OPN mRNA in 44 frozen NPC tissue and 15 normal nasopharyngeal epithelium tissue (NNET) samples was examined by semi-quantitative reverse transcriptase polymerase chain reaction (qRT-PCR). OPN protein expression in 67 paraffin-embedded NPC tissue and 21 NNET samples was detected by immunohistochemistry (IHC). In addition, OPN expression was investigated in 12 paired NPC and para-carcinoma tissue (PCT) samples by western blotting (WB). The association between the expression of OPN and the clinicopathologic parameters of NPC was evaluated.RESULTS:
Three different methods all showed that the expression of OPN mRNA or protein in NPC was significantly higher than in NNET or PCT (P = 0.000, 0.001, 0.000, respectively). After an examination by IHC, 88.1% (59/67) of NPC samples showed strong or moderate positive OPN staining and 28.6% (6/21) of NNET samples displayed a weak positive OPN staining. The staining of OPN in tumor cells was mainly localized to the cytoplasm. OPN expression in NPC was not related to patient age or sex (P > 0.05), but was significantly related to tumor size, regional lymph nodal metastasis, and NPC clinical stages (P < 0.05).CONCLUSIONS:
Our study demonstrated that OPN mRNA and protein overexpression in NPC may be important in the pathogenesis of the disease. It was strongly related to T stage, N stage and clinical stages of NPC, suggesting that OPN may be involved in NPC metastasis and progression.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Neoplasias Nasofaríngeas
/
Osteopontina
Tipo de estudio:
Observational_studies
/
Risk_factors_studies
Límite:
Adult
/
Female
/
Humans
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Male
/
Middle aged
Idioma:
En
Revista:
J Cancer Res Ther
Asunto de la revista:
NEOPLASIAS
/
TERAPEUTICA
Año:
2011
Tipo del documento:
Article
País de afiliación:
China