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KMID : 0356720120280050253
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Journal of the Korean Society of Coloproctology
2012 Volume.28 No. 5 p.253 ~ p.258
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Prognostic Implication of 15-Hydroxyprostaglandin Dehydrogenase Down-Regulation in Patients with Colorectal Cancer
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Kang Pil-Sung
Kim Jin-Ha
Moon Ok-In
Lim Sung-Chul
Kim Kyung-Jong
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Abstract
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Purpose: Prostaglandin (PG) E2 is known to be closely related to cancer progression and is inactivated by 15-hydroxyprostaglandin dehydrogenase (PGDH). 15-PGDH is shown to have tumor suppressor activity and to be down-regulated in various cancers, including colorectal cancer (CRC). Therefore, we evaluated the expression of 15-PGDH and its prognostic effect in patients with CRC.
Methods: 15-PGDH expression was examined by using immunohistochemistry in 77 patients with CRC. Its prognostic significance was statistically evaluated.
Results: Negative 15-PGDH expression was noted in 55.8% of the 77 cases of CRC. 15-PGDH expression showed no correlation with any of the various clinicopathologic parameters. The status of lymph node metastasis, tumor-node-metastasis stages, and pre-operative carcinoembryonic antigen levels showed significant prognostic effect. However, univariate analysis revealed down-regulation of 15-PGDH not to be a predictor of poor survival. The 5-year overall survival rate was 71.7% in the group with positive expression of 15-PGDH and 67.1% in the group with negative expression of 15-PGDH, but this difference was not statistically significant (P = 0.751).
Conclusion: 15-PGDH was down-regulated in 55.8% of the colorectal cancer patients. However, down-regulation of 15-PGDH showed no prognostic value in patients with CRC. Further larger scale or prospective studies are needed to clarify the prognostic effect of 15-PGDH down-regulation in patients with colorectal cancer.
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KEYWORD
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Colorectal neoplasms, 15-hydroxyprostaglandin dehydrogenase, Down-regulation, Immunohistochemistry, Prognosis
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