Fine Structure of the Parotid and Mandibular Glands of the Cotton Rat (Sigmodon hispidus)

Abstract

Abstract:The parotid and mandibular glands of the cotton rat were examined by light and transmission electron microscopy. Parotid gland: Acinar cells were serous in nature, and contained electron-dense granules. Intercalated duct cells contained electron-dense granules. Striated duct cells had small granules of moderate and high electron densities. Mandibular gland: Acinar cells were seromucous in nature, and contained granules of low and moderate electron densities. Intercalated duct cells contained granules of moderate and high electron densities. Striated ducts were comprised of two portions -a secretory portion and a striated portion without granules. The secretory portion had many electrondense granules. A sexual dimorphism was obserbed in these granules, which were smaller and fewer in females than in males.

Ultrastructural study of the adult albino rat parotid gland with special reference to the role of stromal telocytes

“…The nucleus and parallel arrays of endoplasmic reticulum occupied the basal portion in the acinar cells whereas the electron-dense secretory granules, as well as other cytoplasmic organelles such as the mitochondria, filled much of the rest of the cytoplasmic space. These results are in agreement with those reported by many authors [17,19].…”

“…All the elements were colored carefully using Adobe Photoshop software using aWacom digital tablet (Wacom Europe GmbH, Krefeld, Germany) to avoid any software mismatches [11]. stroma (Figs 11,12,16,(18)(19)(20). These cells appeared as solitary spindle-shaped cells with euchromatic nuclei and with specific very long and thin moniliform prolongations (telopodes).…”

“…The telocytes with their long telopodes were outside the acinar and ductal basal lamina. Telocytes created a network, especially by branching of their long telopodes that came in contact with the blood and lymphatic capillaries (Figs 11,16,19,and 20). Elements of this telocyte network were interacting with each other (Fig.…”

Ultrastructure of Acinar Secretory Granules of Submandibular and Parotid Salivary Gland in the Korean Striped Field Mouse,Apodemus agrarius(Rodentia, Murinae)

“…The mucous acinar granules of the submandibular gland had a moderately dense matrix without a substructure and were clustered together as a result of indistinct boundaries between the granules. Although the matrix of the acinar secretory granules in the submandibular and parotid glands were similar to those of species of Rodentia (Suzuki et al, 1983(Suzuki et al, , 1986(Suzuki et al, , 2003 and did not have the characteristic substructure in a matrix as previously reported for bats and Korean Soricidae spp. (Carson & Rose, 1993;Jeong et al, , 2012 Philips & Tandler, 1987;Tandler et al, 1988Tandler et al, , 1990, there were differences in the form and size of the granules.…”

“…More recently, interspecies studies on ultrastructural differences between homologous cells and secretory granules in salivary glands have been conducted for various wild species of bats and Insectivora (Carson & Rose, 1993;Jeong et al, , 2012Lobo-da-Cunha et al, 2009;Mineda, 1981;Phillips & Tandler, 1987;Phillips et al, 1987a;Suzuki et al, 2003;Tandler et al, 1988Tandler et al, , 1990) and these studies have been focused on the aspect of mammalian systematics in natural populations (Phillips & Tandler, 1987). There are few studies on the ultrastructure of acinar cells and secretory granules in the salivary glands of Rodentia (Suzuki et al, 1983(Suzuki et al, , 1986(Suzuki et al, , 2003. Although these comparative ultrastructural studies are relatively few, investigation of ultrastructural differences between homologous cells in salivary gland cells is ideal for providing a foundation for molecular comparisons of genetic relationships (Philips & Tandler, 1987;Tandler et al, 1990).…”