MicroRNA-221 controls CDKN1C/P57 expression in human colorectal carcinoma / 中华胃肠外科杂志
Chinese Journal of Gastrointestinal Surgery
; (12): 279-283, 2011.
Article
em Zh
| WPRIM
| ID: wpr-237128
Biblioteca responsável:
WPRO
ABSTRACT
<p><b>OBJECTIVE</b>To investigate the expression of microRNA-221 (miR-221) and CDKN1C/P57 in colorectal carcinoma (CRC) and adjacent non-cancerous tissues. The effect of miR-221-specific inhibitor on cell proliferation and apoptosis in CRC cells was also assessed.</p><p><b>METHODS</b>The expression of miR-221 was detected by real-time RT-PCR. CDKN1C/P57 mRNA and corresponding protein expression pattern were detected by semi-quantitative RT-PCR and Western-blot. The specific 2'-methoxy-modified RNA oligonucleotide of miR-221(miRNA inhibitor,anti-miR-221) was designed, synthesized and transfected into Caco2 cell by liposome. Finally, the status of CRC cell proliferation and apoptosis were detected by MTT assay and flow cytometry.</p><p><b>RESULTS</b>The expression of miR-221 was significantly up-regulated in CRC tissues as compared to the adjacent non-cancerous tissues(2.041±1.401 vs. 0.806±0.341, P<0.01). There was no significant difference in CDKN1C/P57 mRNA expression between CRC and non-cancerous tissues, whereas CDKN1C/P57 protein markedly decreased in CRC (3.019±1.708 vs. 0.972±0.316, P<0.01). miR-221-specific inhibitor significantly enhanced CDKN1C/P57 protein expression, inhibited proliferation of CRC cells and induced apoptosis of CRC cells(P<0.01).</p><p><b>CONCLUSIONS</b>miR-221 inhibits CDKN1C/P57 expression by post-transcriptional gene silencing to promote CRC development and progression. miR-221-specific inhibitor potentially inhibits the growth of CRC cells. Therefore, it may be a new target for the biologic therapy for CRC.</p>
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Índice:
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Assunto principal:
Patologia
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Neoplasias Colorretais
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Apoptose
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Células CACO-2
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MicroRNAs
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Interferência de RNA
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Linhagem Celular Tumoral
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Proliferação de Células
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Inibidor de Quinase Dependente de Ciclina p57
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Genética
Limite:
Adult
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Aged
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Female
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Humans
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Male
Idioma:
Zh
Revista:
Chinese Journal of Gastrointestinal Surgery
Ano de publicação:
2011
Tipo de documento:
Article