XB-ART-24425
J Exp Zool
1991 Nov 01;2602:165-9. doi: 10.1002/jez.1402600205.
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Calcium regulation of epidermal cell differentiation in the frog Xenopus laevis.
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Adult frogs have a stratified epidermis with a keratinized stratum corneum. Since the extracellular calcium concentration is known to regulate differentiation of mammalian epidermal cells in vitro, we studied the effects of calcium on the terminal differentiation of frog epidermal cells. Exposure of the epidermal cells to a high concentration of calcium (greater than 0.2 mM) induced cornification and the synthesis of a 51 Kd acidic keratin. These data are very similar to the results from mammalian epidermal cell cultures, suggesting that the mechanism of terminal differentiation is conserved throughout the evolution of terrestrial vertebrates.
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