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- W2012507614 abstract "A major obstacle to obtaining more detailed insights into the diversity of phenotypic and molecular changes occurring in colon cancer cells is the lack of low-passage colon cancer cell lines, which would still closely reflect the phenotype of the colon cancer cells in vivo. Here, we characterize eight novel, low passage number human colon carcinoma cell lines, originating from colorectal cancers extensively characterized in the clinics. All cell lines closely resemble the original tumors with respect to phenotype, markers and detectable genetic changes. Cell morphology and marker expression is highly variable, ranging from fully polarized cells correctly expressing all basolateral epithelial markers, to cells with mesenchymal characteristics and a complete loss of polarity due to delocalization or loss of junction complex proteins. The alterations in phenotype and epithelial marker expression correspond to changes already detectable in the primary tumor in vivo. Seven of the cell lines show chromosomal instability, while one cell line is characterized by microsatellite instability. p53 associated with K-ras mutations were detected in three cell lines. Hitherto non-described E-cadherin mutations were found at both alleles in one cell line whereas in another cell line the E-cadherin protein was down-regulated. A stabilizing beta-catenin mutation (S45F) appears in the same cell line that carried the mutated E-cadherin gene. Six cell lines carried APC mutations, which in five of the lines led to an activated beta-catenin/Tcf/LEF signaling pathway. In accordance with beta-catenin/Tcf/LEF activation, the cell lines show increased migration and invasiveness. Our results show that the characterized, low-passage cell lines mirror the diversity of the individual tumors from which they were derived. Through molecular analyses of these cell lines we demonstrate that tumorgenicity events are much more diverse in human colon cancer than expected, despite the common origin of the tumors from a small patient group with similar tumor grading and clinical prognosis." @default.
- W2012507614 created "2016-06-24" @default.
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- W2012507614 date "2002-07-05" @default.
- W2012507614 modified "2023-10-10" @default.
- W2012507614 title "Novel colon cancer cell lines leading to better understanding of the diversity of respective primary cancers" @default.
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- W2012507614 doi "https://doi.org/10.1038/sj.onc.1205577" @default.
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