Pflüger E, Lang E, Benke R, Heckl-Ostreicher B, Altevogt P, Schirrmacher V. Generation of adhesive tumor variants: chromosomal changes, reduction in malignancy and increased expression of a distinct membrane glycoprotein.
Clin Exp Metastasis 1988;
6:485-99. [PMID:
3044658 DOI:
10.1007/bf01784379]
[Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Tumor cell variants which grow adherent to a plastic surface could be isolated in a reproducible way from the high metastatic tumor cell line ESb which grows in a suspension culture. This occurred when starting selection from the uncloned parental line as well as from a freshly derived non-adhesive subclone. The variants showed changes in their karyotype. These were quantitative (tetraploidization) and qualitative (single chromosome aberrations involving the chromosomes 12 and 17 and a marker MX-7). Phenotypic cell surface changes were documented in vitro by immunofluorescence using a monoclonal antibody (mAb 12-15) directed against a distinct plasma membrane glycoprotein of 60-69kD (gp 60-69). The expression of gp 60-69 increased with time of selection for adherence to plastic surface. The adherent cells showed in all cases a greatly reduced overall malignancy as seen by a prolonged survival time of respective tumor bearing animals compared with the suspension growing parental cells.
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