Expression of nm23-H1 gene and Sialyl Lewis X antigen in breast cancer

Oncology
A YamaguchiG Nakagawara

Abstract

The nm23 gene has been proposed as a candidate tumor metastasis suppressor in some human cancers. Sialyl Lewis X (sLex) has been demonstrated to play an important role in the adhesion of human cancer cells to human vascular endothelium, inducing metastasis. Little information has been reported about the correlation between the expression of nm23 and sialylated carbohydrate antigens. In the present study, 102 surgically resected primary breast cancer tissues were sectioned and stained with antibody against nm23-H1 and sLex. Of the 102 cases, 39 (38.2%) cases with a reduced expression of nm23-H1 were observed, and the numbers of sLex-positive cases were 61 (59.8%), respectively. The reduced expression of nm23-H1 and the positive expression of sLex were significantly associated with lymph node involvement. Among the 100 patients who underwent curative surgery, the disease-free survival rate was significantly correlated to both the nm23-H1 and sLex expressions. No interrelated expressions were found between nm23-H1 and sLex. In multivariate analysis using Cox regression model, combination assay of nm23-H1 and sLex expression emerged as independent significant prognostic factors. These results suggest that nm23-H 1 gene and sLex may...Continue Reading

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