Abstract
After hypophysectomy, the parotid gland of the rat loses weight and its acinar epithelial cells become smaller and depleted of zymogenic granules and amylolytic activity. That the adrenal cortex and ovaries have little influence over the parotid gland is indicated by failure of the following procedures to reduce the weight or alter the cytology of the gland: adrenalectomy, gonadectomy, or suppression of the pituitary secretion of corticotropin and gonadotropins due to treatment with 6α-methyl-17α-hydroxyprogesterone. Full restoration of the gland may be effected in hypophysectomized rats by therapy with somatotropin, thyroxine and corticosterone (STC). These observations, in addition to the significant degree of involution which follows thyroidectomy, indicate that the thyroid and pituitary glands are of major importance in modulating the parotid gland.
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