Silencing of caveolin-1 in fibroblasts as opposed to epithelial tumor cells results in increased tumor growth rate and chemoresistance in a human pancreatic cancer model
| Autor: | Konstantinos Kamposioras, Vasiliki Liakouli, Konstantinos Dimas, Nikolaos Sakellaridis, Argyro Daoukopoulou, Christos Papandreou, Chrysiida Tsimplouli, Gemma Migneco, George Vassilopoulos, Alan Anthoney, Caroline S. Verbeke, Francesco Del Galdo, Spyros P. Potamianos |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
0301 basic medicine
Cancer Research caveolin-1 Stromal cell Cell pancreatic cancer Caveolin 1 Biology 03 medical and health sciences Mice 0302 clinical medicine Downregulation and upregulation Pancreatic cancer Cell Line Tumor medicine stroma Animals Humans Gene Silencing Cell Proliferation Oncogene Cancer chemoresistance Epithelial Cells Articles Cell cycle Fibroblasts medicine.disease Xenograft Model Antitumor Assays Gene Expression Regulation Neoplastic Pancreatic Neoplasms 030104 developmental biology medicine.anatomical_structure xenografts Oncology Drug Resistance Neoplasm 030220 oncology & carcinogenesis Cancer cell Cancer research cardiovascular system |
| Zdroj: | International Journal of Oncology |
| ISSN: | 1791-2423 1019-6439 |
| Popis: | Caveolin-1 (Cav-1) expression has been shown to be associated with tumor growth and resistance to chemotherapy in pancreatic cancer. The primary aim of this study was to explore the significance of Cav-1 expression in pancreatic cancer cells as compared to fibroblasts in relation to cancer cell proliferation and chemoresistance, both in vitro and in vivo, in an immunodeficient mouse model. We also aimed to evaluate the immunohistochemical expression of Cav-1 in the epithelial and stromal component of pancreatic cancer tissue specimens. The immunohistochemical staining of poorly differentiated tissue sections revealed a strong and weak Cav-1 expression in the epithelial tumor cells and stromal fibroblasts, respectively. Conversely, the well-differentiated areas were characterized by a weak epithelial Cav-1 expression. Cav-1 downregulation in cancer cells resulted in an increased proliferation in vitro; however, it had no effect on chemoresistance and growth gain in vivo. By contrast, the decreased expression of Cav-1 in fibroblasts resulted in a growth advantage and the chemo-resistance of cancer cells when they were co-injected into immunodeficient mice to develop mixed fibroblast/cancer cell xenografts. On the whole, the findings of this study suggest that the downregulation of Cav-1 in fibroblasts is associated with an increased tumor proliferation rate in vivo and chemoresistance. Further studies are warranted to explore whether the targeting of Cav-1 in the stroma may represent a novel therapeutic approach in pancreatic cancer. |
| Databáze: | OpenAIRE |
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