Journal of Pathology and Translational Medicine

Original Articles

Validation of Gene Expression Changes of Osteopontin and MMP-1 in Primary and Metastatic Colorectal Carcinomas.: Junjeong Choi, Sangkyum Kim, Jeon Han Park, Nam Kyu Kim, Hoguen Kim; Korean J Pathol. 2010;44(3):225-233.; DOI: https://doi.org/10.4132/KoreanJPathol.2010.44.3.225

Abstract PDF: BACKGROUND
Metastasis is one of the most important characteristics of cancer in terms of its impact on patient survival. Unfortunately, identification of altered genes during tumor metastasis is limited.
METHODS
Using high-throughput microarrays containing 19K spotted human oligonucleotides, gene expression of primary and matched metastatic colon cancer were compared in previous study. Although DNA microarray analysis did not demonstrate complete classification of primary and metastatic carcinoma, 80 differentially expressed genes were identified. Among these, expression of osteopontin, matrix metalloproteinase-1 (MMP-1) and serpin A1 was assessed using immunohistochemistry in a validation set containing 43 pairs from tissue microarrays.
RESULTS
The expression of osteopontin was significantly higher in metastatic carcinoma than in primary carcinoma, as indicated by mRNA expression. The expression of MMP-1 was significantly lower in metastatic carcinoma. Expression of serpin A1 was not correlated with the microarray results.
CONCLUSIONS
Osteopontin and MMP-1 expression successfully classified primary and metastatic colorectal carcinomas and further studies on their clinical application is encouraged.

CD44 and MMP14 Expression Associated with WHO Grade of the Astrocytoma and the Prognostic Implications.: Jaekyung Myung, Bogun Jang, Heae Surng Park, Woongjae Yon, Hyun Ju Lee, Sung Hye Park; Korean J Pathol. 2010;44(1):35-41.; DOI: https://doi.org/10.4132/KoreanJPathol.2010.44.1.35

Abstract PDF: BACKGROUND
CD44 is a cell surface receptor that has been implicated in tumor cell invasion and metastasis in a range of tumors of various organs, including breast, ovary, colon, lung, and brain. CD44 stimulates the invasive ability by interacting with matrix metalloproteinase 14 (MMP14). The expression of MMP14 on the cell surface is thought to trigger multiple proteinase cascades and to stimulate cell migration.
METHODS
A total 54 astrocytoma patients were eligible for this study. We performed a retrospective clinicopathological review and CD44 and MMP14 immunohistochemistry.
RESULTS
The expressions of CD44 and MMP14 were significantly correlated with the World Health Organization (WHO) grade. On univariate analysis, the WHO grade and the expression of CD44 were the significant prognostic factors affecting overall survival (OS) and disease progression free survival (DPFS). On the multivariate analysis by the Cox regression model, the only WHO grade was shown to be a significant independent prognostic factor for predicting the DPFS and OS.
CONCLUSIONS
In this study, the CD44 and MMP14 expressions were related to the WHO grade of astrocytoma. The CD44 expression status was a prognostic factor for DPFS and OS on univariate analysis, but it was not an independent prognostic factor on the multivariate analysis.

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