Abstract
This article reports the establishment of variant cell lines with high and low metastatic potential by repeated selection and the dilution plating technique. Five clones with high metastatic potential, Lu‐2, Lu‐7, Lu‐4, Lu‐1 and Lu‐5, and four clones with low metastatic potential, 3S, 7S, 8S and 13S, were established from PC‐14 human lung adenocarcinoma. The high‐metastatic cell lines produced enhanced lung metastases, but the low‐metastatic cell lines did not produce lung metastasis by injection into the tail vein of 5‐week‐old BALB/c nude mice. The high‐metastatic cell lines produced enhanced tumors on both visceral and parietal pleurae, and enhanced metastases to the mediastinum and contralateral pleural cavity. The low‐metastatic cell lines produced reduced tumors on both visceral and parietal pleurae and reduced metastases to the mediastinum and contralateral pleural cavity after injection into the left preceral cavity of the nude mice. When the nine variant cell lines and original PC‐14 cells were embedded in collagen gels, the PC‐14 cells and the low‐metastatic cell lines gave rise to colonies with a dendritic morphology, and cells were tightly associated. The high‐metastatic cell lines were more loosely associated and scattered into three‐dimensional colonies. These nine cloned cell lines originated from heterogeneous populations of the parental PC‐14 cells should be useful tools for studying the process of metastasis of lung cancer.
Keywords: Human lung adenocarcinoma PC‐14, Establishment of cell lines, Metastasis
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References
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