Chromosome studies on a human liposarcoma cell line

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Abstract
Numerical and structural chromosome analysis of a human retroperitoneal liposarcoma cell line maintained under standard cell culture conditions revealed a very stable hypodiploid mode. If the cells were not trypsinized for several generations, a near-triploid stemline, which was generally a duplication of the hypodiploid mode, emerged. Some chromosomes appeared to be relatively stable pairs (1, 2, 7, 9, and 12), but most had “lost” one homolog or both (4 and 21) or were rearranged into “new” marker chromosomes. Quantitation of the genetic material showed a loss of 12.0 ± 3.7% per spread. Only one characteristically long marker chromosome, which is present in every cell, could be identified with certainty as a translocation between chromosomes 4 and 11. Several of the marker chromosomes showed interstitial negatively staining regions with the trypsin-Giemsa method.

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