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KMID : 0376219850220030517
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Chonnam Medical Journal
1985 Volume.22 No. 3 p.517 ~ p.522
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The Fine Structure of Adenohypophysis of the Mongolian Gerbils
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Abstract
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The fine structure of each type of adenohypophysial cells in Mongolian gerbils was studied by electron microscopy. Based on the size, shape and internal structure of secretory granules and on the ultrastructural characteristics seven cell types were classified.
Somatotrophs were spherical or polygonal in shape and contained spherical secretory granules averaging 350~500nm in diameter. Some somatotrophs and other neighboring cells were joined by junctional complex. Mammotrophs were generally spherical or polygonal in shape with secretory granules 600-800nm in diameter. These granules were the largest in all cells in the pars anterior.
Two types of gonadotrophs, follicle-stimulating hormone cells and luteinizing hormone cells contained granules averaging 200~300nm in diameter. Folliclestimulating hormone cells were characterized by numerous oval vacuoles and well developed Golgi apparatus, while luteinizing hormone cells contained irregularly shaped nuclei and inconspicuous Golgi apparatus. Adrenocorticotrophs were stellateshaped with long cytoplasmic processes and contained secretory granules averaging 150~200nm in diameter. The granules scattered throughout the cytoplasm. Thyrotrophs were polygonal in shape with secretory granule about 150nm in diameter. Junctional complex existed between the thyrotrophs and neighboring cell of other types. Follicular cells were typically stiletto with long cytoplasmic processes extending between other cells of glandular parenchyma. In the cytoplasm, the follicular cells contained a few mitochondria and free ribosome.
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