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Original Articles
- Expression of nm23 Protein in Breast Carcinoma: An immunohistochemical study.
- Sang Yong Song, Je G Chi, Se Hwan Han, Kuk Jin Choe
- Korean J Pathol. 1995;29(4):469-477.
- 1,813 View
- 11 Download
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Abstract
PDF - To elucidate a possible prognostic factor, we studied 91 cases of breast carcinoma for the expression of n-tn23 protein using an immunohistochemical method, and compared these results with the known prognostic parameters of the breast carcinoma. The mn23 protein was intensely stained in the cytoplasm and/or the nucleus of carcinoma cells in 82 cases(90.1%). There were two patterns of cytoplasmic staining; heterogeneous pattern and homogeneous pattern. Among the positive cases, 43 cases(47.2%) were heterogeneous while 39 cases(42.8%) were homogeneous. Axillary lymph node metastases(p<0.005) was found more frequently in the heterogeneous pattern group(79.0%) than in the homogeneous pattern group(41.0%). There was no significant correlation between nm23 protein expression and other parameters such as patient age, tumor size, estrogen receptor, histopathologic grade, and p53 overexpression. Although axillary lymph node metastasis was correlated with the disease free status(p<0.0005) and patient survival (p<0.05), they showed no correlation with nin23 expression. Multivariate analysis showed that axillary lymph node metastasis was the only prognostic indicator(p<0.05), and the expression of nm23 protein was of borderline significance. The results suggest that the homogeneous and/or granular cytoplasmic expression of mn23 protein plays a role in the suppression of nodal metastasis in breast carcinoma and might contribute in predicting patient survival.
- Expression of nm23 Protein in Human Gastric Carcinoma: correlation between nm23 expression with the development and metastasis of gastric carcinoma.
- Jin Hee Sohn, Hye Rym Park, Young Oui Park
- Korean J Pathol. 1996;30(6):487-494.
- 1,469 View
- 12 Download
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Abstract
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- Gene expression of nm23 has been investigated in many kinds of tumors, including breast cancers, colon cancers, hepatocellular carcinomas, papillary carcinomas of the thyroid and malignant melanomas since the nm23 was dislovered by Dr. Steeg as a tumor metastatic suppressor gene. Reduced expression of nm23 gene implicated in high metastatic potential in a variety of malignancies. However, there have been only a few reports on genetic alteration and expression of nm23 in human gastric carcinomas even though gastric carcinoma is a leading malignancy in Korea. In this study, we examined the expression of nm23 protein by immunohistochemistry in advanced and early gastric carcinomas, adenomas, matching normal mucosa to elucidate the role of nm23 in the development, progression and metastasis of human gastric carcinomas. The results are as follows; 1) Nm23 was expressed in 39 cases(69.6%) of 56 advanced gastric carcinomas. Among them, strong positive cases(grade 3) were 26(46.4%) and weak positive cases(grade 2) were 13(23.2%). 2) Nm23 expression was significantly different (P<0.05) depending on the site of the neoplasm. Antral carcinomas showed grade3 positivity in the 22/37 cases(60%), but carcinomas of the body showed negative (grade 1) result in about half(42.1%). 3) Nm23 expression was more intense in the neoplasm than normal mucosa.(67.9%) 4) Nm23 expression was not significantly related to the lymph node metastasis, invasion of lymphatics or veins and depth of invasion. 5) In the well differentiated carcinomas, grade3 were more common(64.0%). But in cases of signet ring cell carcinoma, many cases were negative(50.0%). 6) Nm23 expression rate and intensity was significantly increased from the normal mucosa to the gastric adenomas, early gastric carcinomas and advanced gastric carcinomas.
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