A Comparative Ultrastructural Study of the Parotid Gland Acinar Cells of Nine Wild Ruminant Species (Mammalia, Artiodactyla)

1996 ◽  
Vol 34 (2) ◽  
pp. 79-86 ◽  
Author(s):  
S Ito ◽  
M Stolte
Keyword(s):  
Parotid Gland ◽  
Ultrastructural Study ◽  
Acinar Cells ◽  
Wild Ruminant ◽  
Ruminant Species

Ultrastructure of the Parotid Gland of the Nine-Banded Armadillo

1977 ◽  
Vol 35 ◽  
pp. 640-641
Author(s):  
J. R. Ruby
Keyword(s):  
Endoplasmic Reticulum ◽  
Parotid Gland ◽  
Periodic Acid ◽  
Acinar Cells ◽  
Duct System ◽  
Parotid Glands ◽  
Dasypus Novemcinctus ◽  
Anterior Portion ◽  
Periodic Acid Schiff ◽  
Thin Sections

Parotid glands were obtained from five adult (four male and one female) armadillos (Dasypus novemcinctus) which were perfusion-fixed. The glands were located in a position similar to that of most mammals. They extended interiorly to the anterior portion of the submandibular gland.In the light microscope, it was noted that the acini were relatively small and stained strongly positive with the periodic acid-Schiff (PAS) and alcian blue techniques, confirming the earlier results of Shackleford (1). Based on these qualities and other structural criteria, these cells have been classified as seromucous (2). The duct system was well developed. There were numerous intercalated ducts and intralobular striated ducts. The striated duct cells contained large amounts of PAS-positive substance.Thin sections revealed that the acinar cells were pyramidal in shape and contained a basally placed, slightly flattened nucleus (Fig. 1). The rough endoplasmic reticulum was also at the base of the cell.

scholarly journals Babesia spp. in European wild ruminant species: parasite diversity and risk factors for infection

2014 ◽  
Vol 45 (1) ◽  
pp. 65 ◽  
Author(s):  
Adam O Michel ◽  
Alexander Mathis ◽  
Marie-Pierre Ryser-Degiorgis
Keyword(s):  
Risk Factors ◽  
Parasite Diversity ◽  
Wild Ruminant ◽  
Ruminant Species ◽  
Babesia Spp

scholarly journals Myoepithelioma of the Parotid Gland: A Case Report with Review of the Literature and Classic Histopathology

2017 ◽  
Vol 2017 ◽  
pp. 1-4 ◽  
Author(s):  
Mark Weitzel ◽  
Jason E. Cohn ◽  
Harvey Spector
Keyword(s):  
Salivary Gland ◽  
Parotid Gland ◽  
Benign Tumor ◽  
Clinical Presentation ◽  
Acinar Cells ◽  
Salivary Gland Neoplasm ◽  
Minor Salivary Glands ◽  
Review Of The Literature ◽  
Basal Plasma Membrane ◽  
Basal Plasma

Myoepithelioma is a rare salivary gland neoplasm. They most commonly affect the major and minor salivary glands with the parotid gland being the most common, approximately 40%. Only 1% of all salivary gland neoplasms are myoepitheliomas. Myoepithelioma is usually a benign tumor arising from neoplastic myoepithelial or basket cells which are found between the basement membrane and the basal plasma membrane of acinar cells. They also contain multiple cellular elements. We present a case of a 73-year-old female with myoepithelioma of the parotid gland, an extremely rare neoplasm. There have been approximately 42 cases reported through 1985 and fewer than 100 cases through 1993. We will discuss the clinical presentation, pathophysiology, diagnosis, and treatment of such neoplasms.

scholarly journals Ticks associated with the three largest wild ruminant species in Southern Africa

2007 ◽  
Vol 74 (3) ◽  
Author(s):  
I.G. Horak ◽  
H. Golezardy ◽  
A.C. Uys
Keyword(s):  
Ixodid Tick ◽  
Rhipicephalus Appendiculatus ◽  
Ixodid Ticks ◽  
Amblyomma Hebraeum ◽  
Wild Ruminant ◽  
Ruminant Species ◽  
Boophilus Decoloratus ◽  
Ixodes Rubicundus ◽  
Rhipicephalus Evertsi Evertsi ◽  
Host Status

The objective of this study was to assess the host status of the three largest southern African wild ruminants, namely giraffes, Giraffa camelopardalis, African buffaloes, Syncerus caffer, and eland, Taurotragus oryx for ixodid ticks. To this end recently acquired unpublished data are added here to already published findings on the tick burdens of these animals, and the total numbers and species of ticks recorded on 12 giraffes, 18 buffaloes and 36 eland are summarized and discussed. Twenty-eight ixodid tick species were recovered. All stages of development of ten species, namely Amblyomma hebraeum, Rhipicephalus (Boophilus) decoloratus, Haemaphysalis silacea, Ixodes pilosus group, Margaropus winthemi, Rhipicephalus appendiculatus, Rhipicephalus evertsi evertsi, Rhipicephalus glabroscutatum, Rhipicephalus maculates and Rhipicephalus muehlensi were collected. The adults of 13 species, of which the immature stages use small mammals as hosts, namely Haemaphysalis aciculifer, Hyalomma glabrum, Hyalomma marginatum rufipes, Hyalomma truncatum, Ixodes rubicundus, Rhipicephalus capensis, Rhipicephalus exophthalmos, Rhipicephalus follis, Rhipicephalus gertrudae, Rhipicephalus lounsburyi, Rhipicephalus lunulatus, Rhipicephalus pravus group and Rhipicephalus simus, were also collected.

scholarly journals Lithium-induced reduction in intracellular inositol supply in cholinergically stimulated parotid gland

1986 ◽  
Vol 234 (1) ◽  
pp. 199-204 ◽  
Author(s):  
C P Downes ◽  
M A Stone
Keyword(s):  
Parotid Gland ◽  
Acinar Cells ◽  
Phospholipid Metabolism ◽  
Cholinergic Stimulation ◽  
Inositol Phosphatase ◽  
Agonist Stimulation ◽  
Rat Parotid Gland ◽  
Inositol Phospholipid ◽  
Rat Parotid ◽  
Phosphatidylinositol 4

The effects of lithium and cholinergic stimulation on inositol phospholipid metabolism have been assessed using rat parotid gland slices and isolated acinar cells labelled with 32Pi. Cholinergic stimulation using carbachol caused substantial breakdown of phosphatidylinositol 4,5-bisphosphate (PtdInsP2) and enhanced labelling of phosphatidate (PA) and phosphatidylinositol (PtdIns). Lithium alone had little effect upon 32Pi incorporation, but in combination with carbachol it greatly reduced the PtdIns labelling response to the agonist. Instead the label accumulated in a lipid identified as cytidine monophosphorylphosphatidate. There was also an enhancement of the PA labelling response to carbachol. These lithium-induced alterations in agonist-stimulated phospholipid metabolism were reversed if 10-30 mM-inositol was included in the incubation medium. Despite reduced PtdIns synthesis, lithium had relatively little effect on polyphosphoinositide labelling in stimulated cells. Resynthesis of polyphosphoinositides was monitored in acinar cells that had been stimulated with carbachol and then treated with atropine to block muscarinic receptors. Treatment with lithium during the carbachol-stimulation phase reduced the rate of phosphatidylinositol 4-phosphate synthesis, but had no significant effect upon PtdInsP2. The results suggest that an active inositol phosphatase pathway is essential to maintain intracellular inositol levels, but that PtdInsP2 synthesis is not markedly reduced by a substantial fall in intracellular inositol. This implies a close control over the rates of PtdInsP2 breakdown and resynthesis during agonist stimulation.

scholarly journals Homer2 Protein Regulates Plasma Membrane Ca2+-ATPase-mediated Ca2+Signaling in Mouse Parotid Gland Acinar Cells

2014 ◽  
Vol 289 (36) ◽  
pp. 24971-24979 ◽  
Author(s):  
Yu-Mi Yang ◽  
Jiae Lee ◽  
Hae Jo ◽  
Soonhong Park ◽  
Inik Chang ◽  
...  
Keyword(s):  
Plasma Membrane ◽  
Parotid Gland ◽  
Acinar Cells
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