A murine embryonal carcinoma cell line (F9) was used to examine the effect of a pulsed electromagnetic field on the growth and differentiation of malignant cells. The cells can be induced to differentiate into parietal endodermal cells by treatment with retinoic acid. The pulsed electromagnetic field (1 Gauss and 10 Gauss) promoted the growth of embryonal carcinoma cells in both the presence and absence of retinoic acid. The pulsed electromagnetic field was also found to inhibit retinoic acid-induced differentiation, when the degree of differentiation was based on morphological criteria or on the production of plasminogen activator.
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Akamine et al. (1985) studied this question.
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