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World J Gastroenterol. 2007 Jul 7;13(25):3466-71.

COX-2 expression in gastric cancer and its relationship with angiogenesis using tissue microarray.

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1
Department of Oncology, Sheng Jing Hospital, China Medical University, Shenyang 110022, Liaoning Province, China.

Abstract

AIM:

To explore the expression and clinicopathological significance of cyclooxygenase-2 (COX-2) and microvessel density (MVD) in gastric carcinogenesis, and to investigate their roles in the invasion and the relationship between biological behaviors and prognosis of gastric cancer.

METHODS:

Using Envision immunohistochemistry, COX-2 and CD34 expressions in gastric cancer tissue array were examined. MVD was counted and the relationship between the biological behaviors and prognosis was analyzed.

RESULTS:

The expression of COX-2 in gastric cancer tissue was significantly higher than that in normal mucosa (c2 = 12.191, P < 0.05). The over-expression of COX-2 in gastric cancer was obviously related to metastasis and depth of invasion (c2 = 6.315, P < 0.05), but not related to the histological type and Borrmann type (c2 = 5.391 and c2 = 2.228, respectively). Moreover, MVD in gastric cancer tissues was significantly higher than that in the normal mucosa (65.49 +/- 20.64 vs 36.21 +/- 18.47, t/F = 7.53, P < 0. 05). MVD was related to the histologic type and metastasis (t/F = 3.68 and t/F = 4.214, respectively, P < 0. 05), but not related to the depth of invasion and Borrmann type (t/F = 0.583 and t/F = 0.459, respectively). MVD in COX-2-positive tissues was markedly higher compared to COX-2-negative tissues, indicating a positive correlation between COX-2 expression and MVD (t = 13.12, P < 0. 05).

CONCLUSION:

Tissue microarray (TMA) is a powerful tool for rapid identification of the molecular alterations in gastric cancer. COX-2 expression, via inducing angiogenesis, may play an important role in gastric carcinogenesis. It could be served as a determinant factor for clinical prognosis and curative effect.

PMID:
17659693
PMCID:
PMC4146782
[Indexed for MEDLINE]
Free PMC Article
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