[Ultrastructural features of the gastric parietal cells of a hibernating rodent at different seasons of the year].
The structure of the parietal cells of the suslik Citellus erythrogenys Br. is similar to those in other animals and man and is determined by their localization along the gland. Hibernation, when active secretion of hydrochloric acid is absent, results in decreasing size of these cells, in sharply diminishing development of secretory structures and in alterations of the organoid structure; the number of lysosomes in the parietal cells also does not increase. After awakening, in the parietal cells a great amount of polysomes and cisterns of the granular cytoplasmic network is observed; they secure production of albuminous components in the cell structure. During 3-4 days the size of the cells increases considerably, as well as the level of development of tubulovesicles and intracellular secretory canaliculi. By the end of the first week after awakening, ultrastructure of the parietal cell is nearly identical to that of the animal in active state. Thus, seasonable changes in the ultrastructure of the parietal cells correspond to alterations occuring in the organism's vital activity.
D000818:Animals; D005753:Gastric Mucosa / Q000166:cytology* / Q000648:ultrastructure; D006605:Hibernation; D008247:Lysosomes / Q000648:ultrastructure; D008854:Microscopy, Electron; D008871:Microvilli / Q000648:ultrastructure; D008928:Mitochondria / Q000648:ultrastructure; D009940:Organoids / Q000648:ultrastructure; D012377:Rodentia / Q000033:anatomy & histology*; D012589:Sciuridae / Q000033:anatomy & histology*; D012621:Seasons
Osobennosti ul'trastruktury obkladochnykh kletok zheludka zimnespiashchego gryzuna v razlichnye sezony goda.