Cytogenetic analysis of human renal carcinoma cell lines of common origin (NC 65).

Cytogenetic analyses were performed on 3 clonal cell lines derived from a human renal cell carcinoma and its lymph node metastasis, two long-term tissue culture cell lines (NC 65-Sp and NC 65-R) and a serially transplantable tumor line growing on nude mice and brought into culture at the fifth animal passage (NC 65-V). Karyotype were established using banding techniques. Most of the marker chromosomes could be identified and were derived by deletion, inversion, translocation, or isochromosome formation of Chromosomes 1, 3, 4, 5, 8, 9, and 17. These markers were different from HeLa markers. NC 65-Sp had a near diploid chromosome number, NC 65-R a hypotetraploid number, and NC 65-V had a bimodal chromosome number, and NC 65-V had a bimodal chromosome number. Three chromosome markers were shared by the three cell lines; NC 65-R and NC 65-V shared an additional set of four markers. Markers specific to each line were also observed; they demonstrated the independent derivation of the lines and eliminated laboratory cross-contamination. Common markers between the lines confirmed their common tumoral origin.