## Abstract The effect of EGF on the soft agar colonyβforming ability of fresh human tumor cells was assessed in 40 specimens obtained from various types of carcinoma including those of the breast, endometrium, ovary, and other sites. Cells from four established human tumor cell lines (three breast
The effect of calcium on the initiation and growth of human epidermal cells
β Scribed by P. J. Dykes; L. A. Jenner; R. Marks
- Book ID
- 104762062
- Publisher
- Springer-Verlag
- Year
- 1982
- Tongue
- English
- Weight
- 349 KB
- Volume
- 273-273
- Category
- Article
- ISSN
- 0340-3696
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β¦ Synopsis
The effect of the concentration of Ca 2 + in the medium on the plating efficiency of human epidermal cells has been investigated. Primary cultures plated onto lethally irradiated mouse embryo fibroblasts showed not only increased colony formation at lowered (0.2 mM) Ca 2 + levels but also increased growth rate as indicated by greater colony size. On the other hand, secondary cultures showed little variation in plating efficiency and only small differences in colony size were apparent over the range 0.2-1.64 mM Ca 2+. Epidermal growth factor had no effect on the Ca 2 + dependence of primary or the Ca 2 + independence of secondary cultures.
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## Abstract Confluent, quiescent Swiss 3T3 cells in culture can be stimulated to initiate DNA synthesis and divide by addition of growth factors to the culture medium. Here we show that hydrocortisone and other steroids which have glucocorticoid activity inhibit the stimulation of these cells by ep
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