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Fine Structure and Peroxidase Activity of the Bovine Mandibular Gland Cells
Author(s) -
Bloom Gunnar D.,
Carlsöö Bengt
Publication year - 1974
Publication title -
anatomia, histologia, embryologia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.34
H-Index - 35
eISSN - 1439-0264
pISSN - 0340-2096
DOI - 10.1111/j.1439-0264.1974.tb00762.x
Subject(s) - myoepithelial cell , bone canaliculus , peroxidase , microbiology and biotechnology , mitochondrion , membrane , chemistry , intracellular , ultrastructure , secretion , electron microscope , biology , biophysics , anatomy , biochemistry , enzyme , immunohistochemistry , immunology , physics , optics
Summary The acini of the bovine mandibular gland consist of mucous and demilunar seromucous cells. The mucous cells contain electron‐lucid mucigen droplets or mucoid masses, only rarely delimited by membranes. The cisternae of the RER communicate freely. Mitochondria are scarce. The seromucous demilunar cells contain considerably more granules, and perigranular membranes are far more common. Many granules have characteristic alternating electron opaque and less electron dense areas. The prominent RER appears to be associated with a peculiar labyrinth of interconnecting tubules. Mitochondria are numerous. Numerous myoepithelial cells are observed. The cuboidal cells of the intercalated ducts lack signs of secretory activity. The columnar cells of the striated ducts have extensive infoldings of the basal plasma membrane, associated with mitochondria. The cell apex contains many granulated vesicles. Endogenous lactoperoxidase activity could be demonstrated only in the demilunar cells, within the secretory granules, the RER, including the perinuclear cisternae, as well as the labyrinth mentioned above. A positive reaction could be observed over acinar lumina and in intercellular canaliculi. The possible role of peroxidase as a component of a bactericidal system of the bovine saliva is discussed.