Identification of chromosome aberrations in esophageal cancer cell line KYSE180 by multicolor fluorescence in situ hybridization

Analysis of chromosomal changes in esophageal squamous cell carcinoma (ESCC) can illuminate the molecular mechanisms underlying the development and progression of this cancer, which is among the 10 most common malignant tumors. Cell lines are better suited than surgical samples for chromosome analysis in this cancer. This study used multicolor fluorescence in situ hybridization (M-FISH) to characterize the molecular cytogenetics of ESCC in cell line KYSE180. Two pools of 12-color whole-chromosome painting probes were designed, and two rounds of FISH were performed on the same metaphase spreads. Loss of DNA copy number was observed at 4p, 5q, 6q, 9, 10p, 12p, 13, 14p, 15p, 18p, 18q, 20, 22, and Y. Chromosomal gains and translocations occurred at the entire or part of 1, 2p, 3, 4p, 5p, 5q, 6p, 7, 8, 10q, 11, 12q, 14q, 16, 17q, 19, and Xp. Seven derivative chromosomes (5, 8, 12, 14, 14, 14, and 17) presented complex translocations, each involving three or four chromosomes. No chromosomes 9, 13, or Y were detected. These results add significant information to the existing karyotype description of KYSE180 and provide detailed cytogenetic background data for appropriate use of the cell line.