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Updated: Aug 18, 2026

Establishment of a Simple and Effective Rat Model for Intraoperative Parathyroid Gland Imaging
Published on: August 17, 2022
Secretory granules of prolactin cells of neonatally thyroidectomized female rats
Abstract:
In the anterior pituitary glands of neonatally thyroidectomized female rats sacrificed at 30 days of age, the prolactin granules were small and spherical in shape. The administration of thyroxine to neonatally thyroidectomized rats produced an obvious increase in the number and size of secretory granules in prolactin cells; comparatively large, pleomorphic secretory granules were frequently observed in these cells. These enlarged and pleomorphic granules closely resembled those observed in the prolactin cells of sham-operated control rats. These results may indicate that thyroxine stimulates the basic metabolism or cellular function of prolactin cells of neonatally thyroidectomized rats and leads to the formation of prolactin granules that are similar to those of sham-operated control rats.
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