The hamster harderian gland : a combined scanning and transmission electron microscopic investigation

Scanning electron microscopy of the epithelial cells of the female hamster harderian gland reveals a range of surface features. Some cells exhibit a uniform covering of microvilli while others, often with swollen apices, are relatively devoid of microvilli. Surface pitting is frequent for all cells;...

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Bibliographic Details
Published in:Journal of anatomy 1992-02, Vol.180 (Pt 1), p.127-136
Main Authors: MCGADEY, J, JOHNSTON, H. S, PAYNE, A. P
Format: Article
Language:English
Subjects:
Animals
Biological and medical sciences
Cell Membrane - ultrastructure
Cricetinae
Epithelium - ultrastructure
Female
Fundamental and applied biological sciences. Psychology
Harderian Gland - ultrastructure
Male
Mesocricetus - anatomy & histology
Microscopy, Electron
Microscopy, Electron, Scanning
Microvilli - ultrastructure
Motor control and motor pathways. Reflexes. Control centers of vegetative functions. Vestibular system and equilibration
Vertebrates: nervous system and sense organs
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Summary:Scanning electron microscopy of the epithelial cells of the female hamster harderian gland reveals a range of surface features. Some cells exhibit a uniform covering of microvilli while others, often with swollen apices, are relatively devoid of microvilli. Surface pitting is frequent for all cells; pits represent regions of exocytotic lipid vacuole release. A similar range of surface appearances occurs in the male gland but here cells with uniform microvilli represent type I cells (characterised by small lipid vacuoles) while swollen cells with sparse microvilli are type II cells (characterised by large lipid vacuoles). It is suggested that different cell forms represent a single cell type in varying activity states. Luminal debris is often marked, consisting chiefly of lipids. Solid porphyrin accretions, sometimes surrounded by neutrophils, are numerous in female (but not male) glands. Interstitial mast cells are also numerous in the female gland. The gland contains fenestrated capillaries and extensive lymphatics. The duct of the gland, which has received little attention, possesses ciliated cells, nonciliated cells and basal cells. Ciliated cells possess kinocilia and relatively tall thin microvilli, as well as some lipid vacuoles. Nonciliated cells bear shorter microvilli, apically located mucoid granules, and lamellar formations of smooth endoplasmic reticulum. The basal cells are squat and pyramidal; their lateral walls, which interdigitate with the main duct cell types, show pronounced folding.
ISSN:0021-8782
1469-7580