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Human keratinocytes convert 25(OH)D(3) to hormonally active 1alpha,25(OH)(2)D(3) and respond to its antiproliferative/prodifferentiating action in vitro and in vivo. Levels and activity of 1alpha,25(OH)(2)D(3) are short-lived. 1alpha,25(OH)(2)D(3) induces 24-hydroxylase (CYP24) that rapidly metabolizes the hormone, yielding a cascade of side-chain oxidized(More)
Ca(2+) influx controls essential epidermal functions, including proliferation, differentiation, cell migration, itch, and barrier homeostasis. The Orai1 ion channel allows capacitive Ca(2+) influx after Ca(2+) release from the endoplasmic reticulum, and it has now been shown to modulate epidermal atrophy. These findings reveal new interactions among various(More)
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