THE SIGNIFICANCE OF CLAUDIN-1 AND S100A4 EXPRESSION IN PRIMARY COLORECTAL CARCINOMA | ||||
| Zagazig University Medical Journal | ||||
| Article 1, Volume 22, Issue 1, January 2016, Page 1-14 PDF (1.39 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/zumj.2016.4587 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| Randa Kaf; Essam Saba; Wafaa Refaat; Amira Bahgat | ||||
| Pathology Department, Faculty of Medicine, Zagazig University, Egypt | ||||
| Abstract | ||||
| Background: Metastasis is a major cause of death in colorectal carcinoma (CRC). Epithelial to mesenchymal transition (EMT) plays a role in promoting carcinoma invasion and metastasis. Many molecules are crucial in EMT, including claudin-1 and S100A4. Aim of work: The aim of this study is to assess the pattern of expression and the prognostic significance of claudin-1 and S100A4 in primary colorectal carcinoma. Methods: Claudin-1 and S100A4 expressions were retrospectively analysed by immunohistochemistry in 55 paraffin-embedded specimens of patients with primary colorectal carcinoma. The expressions were correlated with clinicopathological variables, Dukes staging and lymph node metastasis. Results: Normal colonic and rectal mucosa exhibited diffuse, strong circumferential linear membranous pattern of claudin-1 staining (score 0). Twenty six cases (65%) of primary colorectal carcinomas showed decreased claudin1 expression compared to normal mucosa and 14 cases (35%) showed similar claudin1 expression (score 0). None of the studied cases showed increased claudin1 expression. A highly statistically significant relationship was found between claudin1 expression and Lymphovascular invasion (p=0.003), degree of lymphocytic infiltration, peritumoral budding, lymph node ratio, lymph node metastasis and Dukes staging (p<0.001). Fourteen cases (35%) showed negative S100A4 expression (score 0-2), 10 cases (25%) showed mild positive S100A4 expression (score 3), 9 cases (22.5%) showed moderate positive S100A4 expression (score 4-5) and 7 cases (17.5%) showed marked positive S100A4 expression (score 6). A highly statistically significant relationship was found between S100A4 expression and grade of differentiation, lymphovascular invasion (p=0.002), lymphocytic infiltration, peritumoral budding, lymph node metastasis, lymph node ratio and Dukes staging (p<0.001). By Pearson's correlation coefficient (r) method, there is a strong inverse correlation between claudin1 and S100A4 expression. Conclusions: Loss of tight junctions represented by decreased claudin1 expression and acquisition of mesenchymal properties represented by S100A4 overexpression are important in primary colorectal carcinoma progression and metastasis. | ||||
| Keywords | ||||
| Primary colorectal carcinoma; S100A4; Claudin-1; EMT | ||||
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