COMPARATIVE STEREOLOGICAL STUDY OF THE STRIATED AND GRANULAR DUCTS IN MOUSE AND RAT MANDIBULAR GLANDS
Abstract
The mandibular gland in rodents presents a distinct type of ducts, granular, which are not encountered in other mammal species. Our aim was to conduct a stereological study in order to compare the number of striated and granular ducts on the section surface, and also the total surface occupied by each type of duct in part, between albino laboratory mouse and Wistar rat. Thus, we utilized 5 adult males from each species, harvested the mandibular glands and processed them for histological examination. The counts and measurements were performed with the aid of AmScope program, on a surface of 1699510 µm2 for each subject in part and for the statistical analysis we used GraphPad Prism 6.01 software. The results showed that both species contain striated and granular ducts, but differently represented. The albino laboratory mouse presented a significantly smaller number of striated ducts in comparison to Wistar rat, and the surface occupied by these was significantly more reduced. Concerning the granular ducts from mouse mandibular gland, they were significantly better represented in albino laboratory mouse than in Wistar rat, occupying a significantly extended surface. The study highlights the importance of the secretion of granular ducts from albino laboratory mouse and Wistar rat mandibular glands.
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