Epidermal growth factor, renin, and protease in hormonally responsive duct cells of the mouse sublingual gland

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Abstract
In the striated ducts of the sublingual glands of normal adult male, but not female, Swiss-Webster mice a few scattered cells have apical secretion granules. These sublingual duct cells resemble the granular convoluted tubule (GCT) cells of the submandibular glands of adult female mice, in that they are smaller than submandibular GCT cells of adult males, and contain fewer apical granules, and prominent basal striations. These cells stain immunocytochemically for epidermal growth factor (EGF), renin, and protease A. Such granular striated duct cells could be induced in the sublingual glands of adult female mice by treatment with either testosterone propionate or thyroxine; the two hormones give simultaneously acted synergistically in this induction.