Cyclooxygenase-2 expression is a predictive marker for late recurrence in colorectal cancer

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Abstract

Introduction. Cyclooxygenase-2 (COX-2) expression is elevated in colorectal cancer (CRC). However, data about the relation between COX-2 expression and the impact on the biologic behavior of recurrent disease are inconclusive as yet. The aim of this study is to investigate the relationship between the status of COX-2 expression in the primary CRC and the characteristics of recurrence after curative resection of stage I to III CRC. Materials and Methods. Ninety-eight patients with recurrence in 376 CRC patients, who underwent curative surgery between January 1991 and August 2001, were retrospectively assessed. Immunohistochemical staining, performed for the presence of COX-2 on tissue microarrays, was analyzed. Results. Forty-six patients showed elevated COX-2 expression, and 52 patients did not. The mean time to recurrence was significantly longer in the positive group than in the negative group (34.1 months ± 30.0 versus 21.9 months ± 17.4; P = 0 019). Positive COX-2 expression was correlated with late recurrence (>3 years after surgery) [43.5% versus 13.5%; P = 0 001]. In multivariate analysis, COX-2 expression was an independent factor associated with late recurrence (OR 4.656; 95% CI, 1.696 to 12.779; P = 0 003). Recurrence pattern and postrecurrence survival were not different between the two groups. Conclusions. Elevated COX-2 expression in itself is not a prognostic factor, but COX-2 expression in tumor tissue may be an independent predictive marker of late recurrence for patients with stage I to III CRC.

Original languageEnglish
Article number7968149
JournalGastroenterology Research and Practice
Volume2018
DOIs
StatePublished - 2018 Jan 1

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Cyclooxygenase 2
Colorectal Neoplasms
Recurrence
Multivariate Analysis
Staining and Labeling
Survival

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@article{d91ff25bead54d888066a0be19b86979,
title = "Cyclooxygenase-2 expression is a predictive marker for late recurrence in colorectal cancer",
abstract = "Introduction. Cyclooxygenase-2 (COX-2) expression is elevated in colorectal cancer (CRC). However, data about the relation between COX-2 expression and the impact on the biologic behavior of recurrent disease are inconclusive as yet. The aim of this study is to investigate the relationship between the status of COX-2 expression in the primary CRC and the characteristics of recurrence after curative resection of stage I to III CRC. Materials and Methods. Ninety-eight patients with recurrence in 376 CRC patients, who underwent curative surgery between January 1991 and August 2001, were retrospectively assessed. Immunohistochemical staining, performed for the presence of COX-2 on tissue microarrays, was analyzed. Results. Forty-six patients showed elevated COX-2 expression, and 52 patients did not. The mean time to recurrence was significantly longer in the positive group than in the negative group (34.1 months ± 30.0 versus 21.9 months ± 17.4; P = 0 019). Positive COX-2 expression was correlated with late recurrence (>3 years after surgery) [43.5{\%} versus 13.5{\%}; P = 0 001]. In multivariate analysis, COX-2 expression was an independent factor associated with late recurrence (OR 4.656; 95{\%} CI, 1.696 to 12.779; P = 0 003). Recurrence pattern and postrecurrence survival were not different between the two groups. Conclusions. Elevated COX-2 expression in itself is not a prognostic factor, but COX-2 expression in tumor tissue may be an independent predictive marker of late recurrence for patients with stage I to III CRC.",
author = "Kim, {Sung Hoo} and Byungkyu Ahn and Paik, {Seung Sam} and Lee, {Kang Hong}",
year = "2018",
month = "1",
day = "1",
doi = "10.1155/2018/7968149",
language = "English",
volume = "2018",
journal = "Gastroenterology Research and Practice",
issn = "1687-6121",

}

TY - JOUR

T1 - Cyclooxygenase-2 expression is a predictive marker for late recurrence in colorectal cancer

AU - Kim, Sung Hoo

AU - Ahn, Byungkyu

AU - Paik, Seung Sam

AU - Lee, Kang Hong

PY - 2018/1/1

Y1 - 2018/1/1

N2 - Introduction. Cyclooxygenase-2 (COX-2) expression is elevated in colorectal cancer (CRC). However, data about the relation between COX-2 expression and the impact on the biologic behavior of recurrent disease are inconclusive as yet. The aim of this study is to investigate the relationship between the status of COX-2 expression in the primary CRC and the characteristics of recurrence after curative resection of stage I to III CRC. Materials and Methods. Ninety-eight patients with recurrence in 376 CRC patients, who underwent curative surgery between January 1991 and August 2001, were retrospectively assessed. Immunohistochemical staining, performed for the presence of COX-2 on tissue microarrays, was analyzed. Results. Forty-six patients showed elevated COX-2 expression, and 52 patients did not. The mean time to recurrence was significantly longer in the positive group than in the negative group (34.1 months ± 30.0 versus 21.9 months ± 17.4; P = 0 019). Positive COX-2 expression was correlated with late recurrence (>3 years after surgery) [43.5% versus 13.5%; P = 0 001]. In multivariate analysis, COX-2 expression was an independent factor associated with late recurrence (OR 4.656; 95% CI, 1.696 to 12.779; P = 0 003). Recurrence pattern and postrecurrence survival were not different between the two groups. Conclusions. Elevated COX-2 expression in itself is not a prognostic factor, but COX-2 expression in tumor tissue may be an independent predictive marker of late recurrence for patients with stage I to III CRC.

AB - Introduction. Cyclooxygenase-2 (COX-2) expression is elevated in colorectal cancer (CRC). However, data about the relation between COX-2 expression and the impact on the biologic behavior of recurrent disease are inconclusive as yet. The aim of this study is to investigate the relationship between the status of COX-2 expression in the primary CRC and the characteristics of recurrence after curative resection of stage I to III CRC. Materials and Methods. Ninety-eight patients with recurrence in 376 CRC patients, who underwent curative surgery between January 1991 and August 2001, were retrospectively assessed. Immunohistochemical staining, performed for the presence of COX-2 on tissue microarrays, was analyzed. Results. Forty-six patients showed elevated COX-2 expression, and 52 patients did not. The mean time to recurrence was significantly longer in the positive group than in the negative group (34.1 months ± 30.0 versus 21.9 months ± 17.4; P = 0 019). Positive COX-2 expression was correlated with late recurrence (>3 years after surgery) [43.5% versus 13.5%; P = 0 001]. In multivariate analysis, COX-2 expression was an independent factor associated with late recurrence (OR 4.656; 95% CI, 1.696 to 12.779; P = 0 003). Recurrence pattern and postrecurrence survival were not different between the two groups. Conclusions. Elevated COX-2 expression in itself is not a prognostic factor, but COX-2 expression in tumor tissue may be an independent predictive marker of late recurrence for patients with stage I to III CRC.

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