Stable quantitative differences of antigen expression in human melanoma cells isolated by flow cytometric cell sorting.

Abstract:

:The stability of expression of a membrane antigen on human FME melanoma cells was investigated by means of flow cytometric cell sorting and analysis. The melanoma-associated 250 kd antigen was strongly expressed on all cells, as recognized by binding of the monoclonal antibody 9.2.27. By flow cytometric cell sorting, cells of high and low antigen expression were isolated, and the difference in antigen expression between the two populations was examined as a function of time in culture. Immediately after sorting, the median fluorescence intensities of the two populations differed by a factor of 2.7. After the first few days in culture, much of the range in antigen expression of the parent population was regenerated. However, a lasting difference in antigen expression was established, corresponding to 50% higher density of antigen on the cells sorted for high fluorescence intensity, compared to those sorted for low intensity. After trypsin treatment, which removed the antigen from the cell surface, normal antigen expression was regained after 2-3 days in culture, with the same difference between the two populations as before the trypsin treatment. The stability of the established difference in antigen expression between the two sorted subpopulations indicates that expression of this antigen is a precisely controlled, heritable characteristic of the FME melanoma cells.

journal_name

Int J Cancer

authors

Lindmo T,Davies C,Fodstad O,Morgan AC

doi

10.1002/ijc.2910340413

subject

Has Abstract

pub_date

1984-10-15 00:00:00

pages

507-12

issue

4

eissn

0020-7136

issn

1097-0215

journal_volume

34

pub_type

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