15-Hydroxyprostaglandin dehydrogenase as a marker in colon carcinogenesis: analysis of the prostaglandin pathway in human colonic tissue
Intestinal Research
; : 75-82, 2017.
Article
em En
| WPRIM
| ID: wpr-47077
Biblioteca responsável:
WPRO
ABSTRACT
BACKGROUND/AIMS: Cyclooxygenase-2 (COX-2), 15-hydroxyprostaglandin dehydrogenase (15-PGDH), and microsomal prostaglandin E synthase-1 (mPGEs-1) regulate prostaglandin E₂ (PGE₂) expression and are involved in colon carcinogenesis. We investigated the expression of PGE₂ and its regulating genes in sporadic human colon tumors and matched normal tissues. METHODS: Twenty colonic adenomas and 27 colonic adenocarcinomas were evaluated. COX-2 and 15-PGDH expression was quantified by real-time polymerase chain reaction. The expression of PGE₂ and mPGEs-1 was measured using enzyme-linked immunosorbent assay and Western blotting, respectively. RESULTS: The expression of COX-2, mPGEs-1, and PGE₂ did not differ between the adenomas and matched distant normal tissues. 15-PGDH expression was lower in adenomas than in the matched normal colonic tissues (P<0.001). In adenocarcinomas, mPGEs-1 and PGE₂ expression was significantly higher (P<0.001 and P=0.020, respectively), and COX-2 expression did not differ from that in normal tissues (P=0.207). 15-PGDH expression was significantly lower in the normal colonic mucosa from adenocarcinoma patients than in the normal mucosa from adenoma patients (P=0.018). CONCLUSIONS: Early inactivation of 15-PGDH, followed by activation of COX-2 and mPGEs-1, contributes to PGE₂ production, leading to colon carcinogenesis. 15-PGDH might be a novel candidate marker for early detection of field defects in colon carcinogenesis.
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Texto completo:
1
Índice:
WPRIM
Assunto principal:
Oxirredutases
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Ensaio de Imunoadsorção Enzimática
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Adenocarcinoma
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Adenoma
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Western Blotting
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Colo
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Ciclo-Oxigenase 2
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Reação em Cadeia da Polimerase em Tempo Real
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Carcinogênese
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Mucosa
Tipo de estudo:
Screening_studies
Limite:
Humans
Idioma:
En
Revista:
Intestinal Research
Ano de publicação:
2017
Tipo de documento:
Article