Up-regulation of cyclooxygenase-2-derived prostaglandin E2 in colon cancer cells resistant to 5-fluorouracil / 대한외과학회지
Journal of the Korean Surgical Society
; : 115-121, 2011.
Article
em En
| WPRIM
| ID: wpr-127566
Biblioteca responsável:
WPRO
ABSTRACT
PURPOSE: It has been suggested that constitutive up-regulation of cyclooxygenase (COX)-2 is associated with resistance to apoptosis, increased angiogenesis, and increased tumor invasiveness in various cancers including colon cancer. There are many factors involved in the resistance to 5-fluorouracil (5-FU) in colon cancer. However, little is known about the role of COX-2 in acquired resistance to 5-FU in colon cancer. METHODS: Hence we investigated whether COX-2 contribute to acquired resistance to 5-FU in colon cancer cells, using cytotoxicity assay for cell survival, reverse transcription-polymerase chain reaction (RT-PCR) for vascular endothelial growth factor (VEGF), quantitative RT-PCR for COX-1 and COX-2, and enzyme-linked immunosorbent assay for PGE2. RESULTS: The 5-FU resistant colon cancer cells, SNU-C5/5FUR, showed increased expression of COX-2, prostaglandin E2 (PGE2), and VEGF, compared to its parental cell (SNU-C5). By treatment with meloxicam, the expression of PGE2 and VEGF was reduced significantly in the resistant cells, but not in the parent cells. CONCLUSION: These results demonstrate that COX-2 derived PGE2 is up-regulated and COX-2 inhibitor may have an anti-angiogenic effect in the colon cancer cells resistant to 5-FU.
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Índice:
WPRIM
Assunto principal:
Pais
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Tiazinas
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Tiazóis
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Ensaio de Imunoadsorção Enzimática
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Dinoprostona
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Regulação para Cima
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Sobrevivência Celular
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Prostaglandina-Endoperóxido Sintases
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Apoptose
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Colo
Limite:
Humans
Idioma:
En
Revista:
Journal of the Korean Surgical Society
Ano de publicação:
2011
Tipo de documento:
Article