Clinical significance of miR-221 and its inverse correlation with p27Kip¹ in hepatocellular carcinoma.
Mol Biol Rep
; 38(5): 3029-35, 2011 Jun.
Article
en En
| MEDLINE
| ID: mdl-20146005
ABSTRACT
The aim of the present study is to explore possible role of miR-221 in the pathogenesis of HCC. Matched HCC and adjacent non-cancerous samples were assayed for the expression of miR-221 and three G1/S transition inhibitors p27(Kip1), p21(WAF1/Cip1)and TGF-ß1 by in situ hybridization and immunohistochemistry respectively. p27(Kip1) is one of miR-221's proven targets. Real time qRT-PCR was used to investigate miR-221 and p27(Kip1) transcripts in different clinical stages. Western blotting was used to analyze the expression levels of p27(Kip1) protein in different clinical stages. In result, miR-221 and TGF-ß1 are frequently up-regulated in HCC, while p27(Kip1) and p21(WAF1/Cip1) proteins are frequently down-regulated. Moreover, miR-221 and p27(Kip1)'s expression correlated with metastasis and miR-221's expression also correlated with tumor size. Both of p21(WAF1/Cip1)and TGF-ß1's expression correlated with tumor differentiations. miR-221's upregulation and p27(Kip1)'s downregulation were significantly associated with tumor stages and metastasis. In conclusion, miR-221 is important in tumorigenesis of HCC, possibly by specifically down-regulating p27(Kip1), a cell-cycle inhibitor. These results indicate miR-221 as a new therapeutic target in HCC.
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Carcinoma Hepatocelular
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MicroARNs
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Inhibidor p27 de las Quinasas Dependientes de la Ciclina
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Neoplasias Hepáticas
Límite:
Adult
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Aged
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Female
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Humans
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Male
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Middle aged
Idioma:
En
Revista:
Mol Biol Rep
Año:
2011
Tipo del documento:
Article