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Int J Med Sci 2015; 12(2):92-99. doi:10.7150/ijms.10497

Research Paper

Syndecan-1 Expression Is Associated with Tumor Size and EGFR Expression in Colorectal Carcinoma: A Clinicopathological Study of 230 Cases

Su Young Kim1, Eun Ji Choi1, Jeong A Yun1, Eun Sun Jung2, Seung Taek Oh3, Jun Gi Kim3, Won Kyung Kang3, Sung Hak Lee2✉

1. Department of Pathology, The Catholic University of Korea, School of Medicine, Seocho-gu Banpodaero 222, Seoul 137-701, South Korea.
2. Department of Hospital Pathology, The Catholic University of Korea, School of Medicine, Seocho-gu Banpodaero 222, Seoul 137-701, South Korea.
3. Department of Surgery, The Catholic University of Korea, School of Medicine, Seocho-gu Banpodaero 222, Seoul 137-701, South Korea.

Abstract

Background: Syndecan-1 (SDC1) is reported to modulate several key processes of tumorigenesis and has variable expression in many cancers. To date, the cause of altered expression has not been elucidated. In this study, we compared SDC1 expression with various clinicopathological parameters and molecular markers to evaluate its clinical significance in colorectal carcinoma.

Methods: We screened for SDC1 expression using immunohistochemistry in 230 surgical specimens of primary colorectal carcinoma from patients consecutively treated between 2008 and 2011 at Seoul St. Mary's Hospital, The Catholic University of Korea. The relationship between SDC1 expression and various clinicopathological parameters and molecular markers was analyzed.

Results: The tumors were principally located in the left colon (71.3%) and rectum (33.5%). There were 216 (93.9%) adenocarcinomas, 10 (4.3%) mucinous adenocarcinomas, and 4 other tumors. Most of the carcinomas were pT3 (68.3%) and pT4 (22.2%). There was regional lymph node metastasis in 140 patients. SDC1 expression was identified in the cancer cells of 212 (96.8%) colon cancer cases. Of the SDC1-positive cases, 131 showed predominantly membranous immunopositivity, and 81 showed a predominantly cytoplasmic staining pattern. Mixed membranous and cytoplasmic staining was observed in 154 cases. In 93 cases, stromal SDC1 reactivity was noted. Epithelial SDC1 immunopositivity was significantly associated with tumor size (p = 0.016) and epidermal growth factor receptor expression (p = 0.006). However, it was not significantly correlated with lymph node metastasis, distant metastasis, lymphatic or vascular invasion, or KRAS mutation. In addition, stromal SDC1 immunopositivity was significantly associated with the male sex (p = 0.018).

Conclusions: The expression profile of SDC1 may be of clinical value in colorectal cancer and may help in identifying aggressive forms of colorectal carcinoma. Further studies are needed in order to better understand the role of SDC1 in the progression and invasiveness of colorectal carcinoma.

Keywords: Syndecan-1, Expression, Colorectal cancer, Immunohistochemistry, Biomarkers

This is an open access article distributed under the terms of the Creative Commons Attribution (CC BY-NC) License. See http://ivyspring.com/terms for full terms and conditions.
How to cite this article:
Kim SY, Choi EJ, Yun JA, Jung ES, Oh ST, Kim JG, Kang WK, Lee SH. Syndecan-1 Expression Is Associated with Tumor Size and EGFR Expression in Colorectal Carcinoma: A Clinicopathological Study of 230 Cases. Int J Med Sci 2015; 12(2):92-99. doi:10.7150/ijms.10497. Available from http://www.medsci.org/v12p0092.htm