Cultured tobacco (Nicotiana tabacum L. cv. Wisconsin 38) cells were found to have altered DNA contents and chromosome numbers after adaptation to NaCl. Cells adapted to 428 mM NaCl were predominately hexaploid compared to the normal tetraploid 2N(2C)=4X=48 chromosome number of unadapted cells. Enric
DNA content and chromosome number of a heteroploid human tumour cell line
β Scribed by F. T. Bosman; F. C. A. Groen; M. Ploeg
- Publisher
- Springer
- Year
- 1979
- Tongue
- English
- Weight
- 667 KB
- Volume
- 60
- Category
- Article
- ISSN
- 1432-119X
No coin nor oath required. For personal study only.
β¦ Synopsis
In this paper investigations concerning the relation between variability of chromosome number and variability of DNA content within the cells of a tumour stemline are reported. A highly heteroploid human tumour cell line was used, which was derived from a chondrosarcoma. Flow cytometrical and scanning cytophotometrical measurements confirmed the heteroploid nature of the original cell line and of several subclones. Measurement of the DNA content per metaphase showed a linear relation between chromosome number and DNA content of heteroploid cells. This finding is discussed with regard to its implications for the mechanism of heteroploidy in tumour cells.
π SIMILAR VOLUMES
Plants regenerated from tobacco (Nicotiana tabacum L. cv. Wisconsin 38) cells that were adapted to 428 mM NaCl were found to have hexaploid or near-hexaploid chromosome numbers compared to the normal tetraploid, 2N(2C)=4X=48 chromosome numbers of plants regenerated from unadapted cells. Even though
Human tumor cells, after x-irradiation during the G2 phase of the cell cycle, show an abnormally high frequency of persistent chromatid breaks and gaps resulting from deficient DNA repair. Addition of a single human chromosome 11 from normal fibroblasts by micro-cell fusion to cell lines from six di
## Loss of heterozygosity (LOH ) of mouse chromosome 7 has been consistently demonstrated in chemically induced murine squamous cell carcinomas (SCCs). The region of this chromosome presenting LOH in the mouse tumors is syntenic to human chromosome segments I I p I 5 and I I q. To determine whethe