モルモット (Cavia cobaya) 口蓋腺の超微細形態的ならびに組織化学的研究

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The palatal glands of the guinea pig, Cavia cobaya, were examined by means of electron microscopy and histochemistry. The results are summarized as follows : 1. These glands are pure mucous in nature and consisted of at least three parts, the acinus, the intercalated and the excretory ducts. 2. Mucous cells composing the terminal portion of the gland contain secretory granules which show positive reaction to mucicarmine, PAS and alcian blue stainings. These reaction products are also seen in the lumen of the excretory duct. 3. The mucous cell contains a nucleus located near the cell base, well developed granular endoplasmic reticulum in the perinuclear region, prominent Golgi complexes in the supranuclear area and secretory granules in the upper half of the cell. Mitochondria are also the frequent component of the cell. The mucous cell contacts with the adjacent cells by junctional complexes and gap junctions. It seems that the secretory granules are discharged from the mucous cells by an irregular apocrine process. 4. Two to three myoepithelial cells are recognized on each terminal portion. They show positive reaction to alkaline phosphatase staining. Myoepithelial cell contacts with the mucous cell by well developed desmosomes, and the basal lamina by half-desmosomes. 5. The intercalated duct is poorly developed. The epithelial cells of the excretory duct are cuboidal in shape and contain well developed Golgi complexes, abundant mitochondria and lysosomes. The lateral borders of the neighboring cells are conjoined with the junctional complex near the lumen and interdigitate near the base. The basal cell of the excretory duct having single cilium is observed occasionally. 6. Many nerve fibers having beaded varicosity distribute in the interacinar connective tissue. The nerve fiber contains dense-cored vesicles of about 120nm in diameter and small clear vesicles of about 60nm in diameter. The intra-acinar nerve endings are also observed frequently.
九州歯科学会の論文
1983-10-25

モルモット (Cavia cobaya) 口蓋腺の超微細形態的ならびに組織化学的研究

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