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Journal of Cell Science, Vol 8, 673-680, Copyright © 1971 by Company of Biologists

Submitted on September 29, 1970

The Analysis of Malignancy by Cell Fusion

I. Hybrids Between Ehrlich Cells and Normal Diploid Cells

U. BREGULA 1, G. KLEIN 1, and H. HARRIS 2

1 Department of Tumor Biology, Karolinska Institutet 104 01 Stockholm 60, Sweden
2 Sir William Dunn School of Pathology, University of Oxford, Oxford OX1 3 RE, England

When Ehrlich ascites cells were fused with diploid fibroblasts, isolated directly from the animal, the resulting hybrid cells regularly produced progressive tumours. However, an analysis of a range of clonal populations of these hybrid cells, each derived from a separate primary fusion, revealed that the chromosomal constitution of these cells was highly unstable; all cell populations were found to have already undergone substantial chromosome losses by the time enough cells were available to permit chromosomal analysis. Thus, although these hybrid cells were highly tumorigenic, the tumours arising from them were not composed of cells with complete parental chromosome sets, but of cells from which some chromosomes had been eliminated.

Note:
Fellow of the International Agency for Research on Cancer, on leave from the Institute of Oncology, Warsaw, Poland.

Submitted on September 29, 1970




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© The Company of Biologists Ltd 1971