A new human breast carcinoma cell line (PMC42) with stem cell characteristics. II. Characterization of cells growing as organoids
- PMID: 6606728
A new human breast carcinoma cell line (PMC42) with stem cell characteristics. II. Characterization of cells growing as organoids
Abstract
A new human breast carcinoma cell line (PMC42) has been further characterized. The cells can grow either as monolayers or as floating cords of cells. The cords grow in suspension for long periods but may spontaneously attach and grow out to form a typical PMC42 monolayer. Ultrastructurally, the cells resemble breast ductal cells in many respects. Both epidermal growth factor (EGF) and prolactin induce ultrastructural changes, and lipid production is stimulated markedly by both factors. EGF also promoted the attachment of the floating cords and the growth of cells from these cords as monolayer cultures. The karyotype of the cord cells is different from that previously described for the monolayer cultures. Cord cells are hypodiploid (mode 39), whereas the monolayer cultures are subtriploid (mode 66). Although the ploidy is different, the karyotypes are related with 9 marker chromosomes being common to both populations. In addition, cultures in which cords have attached and in which cells are growing out as monolayers are bimodal with 10-20% of the cells becoming pseudotetraploid with a mode of 77.
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