Somatotropes, lactotropes and corticotropes of adult male mice were identified with immunohistochemistry in the adenohypophysis fixed by Os04 alone. Somatotropes were classified into type I somatotropes that contain large (350 nm in diameter) round secretory granules and type II somatotropes that contain small (100–200 nm in diameter) round secretory granules. Most somatotropes were type I somatotropes. Lactotropes were also classified into type I lactotropes that contain irregularly shaped secretory granules and type II lactotropes containing small (100–200 nm in diameter) round secretory granules. Corticotropes are irregular stellate or slender cells with little cytoplasm. They contain round solid secretory granules in various densities along the cell periphery. Most of these are low-density granules (200–300 nm in diameter) and a few are high-density granules (200–250 nm in diameter).These data were compared with the classical data of mouse adenohypophysial cells that were fixed in Os04 alone and identified only by conventional electron microscopy.

Keywords:
Somatotropes, Lactotropes, Corticotropes, Adenohypophysis, Immunohistochemistry, Mouse
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© 1989 S. Karger AG, Basel
1989
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