Abstract
The percentages of cells with different types of cell surface relief were determined in cell suspensions derived from monolayer cultures. Primary cultures of rat embryo fibroblasts (REF) and cell lines REF (LT) and REF-1, immortalized cells of which preserved normal phenotypic characteristics of the initial primary culture REF, as well as morphologically transformed tumorigenic lines REF (LT) ras and REF-2EJ were studied. In REF suspensions the cells with the blebbed type of surface relief were shown to be predominant as compared with those with microvillus relief whereas cell suspensions derived from both immortalized and fully transformed cultures display the reverse ratio of cells with those types of surface relief. Therefore, the pattern of cell surface relief in cell suspensions derived from fibroblastic monolayer cultures may serve as a morphological marker of the initial stage of neoplastic transformation-immortalization when typical morphological signs of cell transformation are not yet manifested in monolayer cultures.
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