Knockdown of peroxisome proliferator-activated receptor-[beta] induces less differentiation and enhances cell-fibronectin adhesion of colon cancer cells
The role of peroxisome proliferator-activated receptor-beta/delta (PPAR-beta/delta) in the pathogenesis of colon cancer remains highly controversial. This study specifically silenced the PPAR-beta expression in three colon cancer cell lines with different metastatic potentials. Although PPAR-beta kn...
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| Veröffentlicht in: | Oncogene 2010-01, Vol.29 (4), p.516 |
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| creator | Yang, L Olsson, B Pfeifer, D Jönsson, J -i Zhou, Z -g Jiang, X Fredriksson, B -a Zhang, H Sun, X -f |
| description | The role of peroxisome proliferator-activated receptor-beta/delta (PPAR-beta/delta) in the pathogenesis of colon cancer remains highly controversial. This study specifically silenced the PPAR-beta expression in three colon cancer cell lines with different metastatic potentials. Although PPAR-beta knockdown resulted in more malignant morphological changes, bigger colony sizes and lower carcinoembryonic antigen (CEA) secretion, and enhanced the cell-fibronectin adhesion, cell invasion and migration were unaffected. These effects were stronger in poorly metastatic cell lines compared with highly metastatic ones. Simultaneously, PPAR-beta knockdown decreased the mRNAs encoding adipocyte differentiation-related protein and liver fatty acid binding protein, and increased the mRNA of ILK, whereas the mRNAs encoding integrin-beta1 and angiopoietin-like 4 were unchanged. Using immunohistochemistry, we determined that the intensity of PPAR-beta expression was stronger in rectal cancers with better differentiation than in those with poor differentiation, and was stronger in early-stage tumors than in advanced ones. Together, these findings consistently indicate that PPAR-beta may facilitate differentiation and inhibit the cell-fibronectin adhesion of colon cancer, having a role as an inhibitor in the carcinogenesis and progression of colorectal cancer. Interestingly, PPAR-beta seems to have a more important role in poorly metastatic cells than in highly metastatic ones. [PUBLICATION ABSTRACT] |
| doi_str_mv | 10.1038/onc.2009.370 |
| format | Article |
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This study specifically silenced the PPAR-beta expression in three colon cancer cell lines with different metastatic potentials. Although PPAR-beta knockdown resulted in more malignant morphological changes, bigger colony sizes and lower carcinoembryonic antigen (CEA) secretion, and enhanced the cell-fibronectin adhesion, cell invasion and migration were unaffected. These effects were stronger in poorly metastatic cell lines compared with highly metastatic ones. Simultaneously, PPAR-beta knockdown decreased the mRNAs encoding adipocyte differentiation-related protein and liver fatty acid binding protein, and increased the mRNA of ILK, whereas the mRNAs encoding integrin-beta1 and angiopoietin-like 4 were unchanged. Using immunohistochemistry, we determined that the intensity of PPAR-beta expression was stronger in rectal cancers with better differentiation than in those with poor differentiation, and was stronger in early-stage tumors than in advanced ones. Together, these findings consistently indicate that PPAR-beta may facilitate differentiation and inhibit the cell-fibronectin adhesion of colon cancer, having a role as an inhibitor in the carcinogenesis and progression of colorectal cancer. Interestingly, PPAR-beta seems to have a more important role in poorly metastatic cells than in highly metastatic ones. 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This study specifically silenced the PPAR-beta expression in three colon cancer cell lines with different metastatic potentials. Although PPAR-beta knockdown resulted in more malignant morphological changes, bigger colony sizes and lower carcinoembryonic antigen (CEA) secretion, and enhanced the cell-fibronectin adhesion, cell invasion and migration were unaffected. These effects were stronger in poorly metastatic cell lines compared with highly metastatic ones. Simultaneously, PPAR-beta knockdown decreased the mRNAs encoding adipocyte differentiation-related protein and liver fatty acid binding protein, and increased the mRNA of ILK, whereas the mRNAs encoding integrin-beta1 and angiopoietin-like 4 were unchanged. Using immunohistochemistry, we determined that the intensity of PPAR-beta expression was stronger in rectal cancers with better differentiation than in those with poor differentiation, and was stronger in early-stage tumors than in advanced ones. Together, these findings consistently indicate that PPAR-beta may facilitate differentiation and inhibit the cell-fibronectin adhesion of colon cancer, having a role as an inhibitor in the carcinogenesis and progression of colorectal cancer. Interestingly, PPAR-beta seems to have a more important role in poorly metastatic cells than in highly metastatic ones. 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This study specifically silenced the PPAR-beta expression in three colon cancer cell lines with different metastatic potentials. Although PPAR-beta knockdown resulted in more malignant morphological changes, bigger colony sizes and lower carcinoembryonic antigen (CEA) secretion, and enhanced the cell-fibronectin adhesion, cell invasion and migration were unaffected. These effects were stronger in poorly metastatic cell lines compared with highly metastatic ones. Simultaneously, PPAR-beta knockdown decreased the mRNAs encoding adipocyte differentiation-related protein and liver fatty acid binding protein, and increased the mRNA of ILK, whereas the mRNAs encoding integrin-beta1 and angiopoietin-like 4 were unchanged. Using immunohistochemistry, we determined that the intensity of PPAR-beta expression was stronger in rectal cancers with better differentiation than in those with poor differentiation, and was stronger in early-stage tumors than in advanced ones. Together, these findings consistently indicate that PPAR-beta may facilitate differentiation and inhibit the cell-fibronectin adhesion of colon cancer, having a role as an inhibitor in the carcinogenesis and progression of colorectal cancer. Interestingly, PPAR-beta seems to have a more important role in poorly metastatic cells than in highly metastatic ones. [PUBLICATION ABSTRACT]</abstract><cop>New York</cop><pub>Nature Publishing Group</pub><doi>10.1038/onc.2009.370</doi></addata></record> |
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| subjects | Cell adhesion & migration Cellular biology Colorectal cancer Fatty acids Gene expression |
| title | Knockdown of peroxisome proliferator-activated receptor-[beta] induces less differentiation and enhances cell-fibronectin adhesion of colon cancer cells |
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