Rab11 regulates E-cadherin expression and induces cell transformation in colorectal carcinoma

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• 作者：Yuan-Chiang Chung ; Wan-Chen Wei ; Shin-Han Huang ; Chi-Min Shih ; Chih-Ping Hsu…
• 关键词：Rab11 ; E ; cadherin ; Colorectal carcinoma ; Vesicle recycling ; Epithelial mesenchymal transition
• 刊名：BMC Cancer
• 出版年：2014
• 出版时间：December 2014
• 年：2014
• 卷：14
• 期：1
• 全文大小：1,949 KB
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• 刊物主题：Cancer Research; Oncology; Stem Cells; Animal Models; Internal Medicine;
• 出版者：BioMed Central
• ISSN：1471-2407

文摘

Background In the process of epithelial mesenchymal transition EMT, the disassembly of junctional adhesion complexes such as E-cadherin is a remarkable sign during changes in cell morphology and polarity. However, E-cadherin expression is dynamic, and is regulated by the cellular endocytic system; it is also involved in cell signaling mechanisms. In this study, we investigated the role of E-cadherin in colorectal tumors and the relationship with recycling endosome protein Rab11 in colon cell transformation. Methods For tissue screening, the expressions of E-cadherin and Rab11 in colorectal tumors were identified by immunohistochemistry in 113 patients with colorectal carcinoma. For the in vitro cell experiment, GFP-tagged Rab11 plasmid was transfected into HT29 colon cells, E-cadherin expression and cell transformation were monitored by Western blot and confocal microscopy. Results In immunohistochemistry, the mean score of E-cadherin in tumor and normal tissues was 1.41?±-.06 and 1.08?±-.06 (p--.05). The mean score of Rab11 in tumor and normal tissues was 0.51?±-.05 and 0.18?±-.02 (p--.05). Synchronous overexpression of E-cadherin and Rab11 was noted in 74 patients (66.5%) with colorectal carcinoma. When GFP-tagged Rab11 plasmid was overexpressed in cultured colon cell line HT-29, the E-cadherin expression was up-regulated, and cell membrane protrusion was induced, which resulted in cell transformation and cell migration. Conclusions This study demonstrated the importance of the overexpression of Rab11 and E-cadherin in colorectal cancer. The results indicated that Rab11 together with E-cadherin might be potential markers for colorectal cancer progression and treatment.