Infradian Rhythm of the Content of Secretory Granules in Pinealocyte Cytoplasm in Mice and Rats

The numerical density of secretory granules dense-core vesicles (DCV) in the cytoplasm of pinealocytes of the pineal gland was estimated by transmission electron microscopy in male white mice and Wistar rats. The 3-day biorhythm and lunaphase changes in the DCV content in the perikaryon and the proc...

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Bibliographic Details
Published in:Bulletin of experimental biology and medicine 2018-06, Vol.165 (2), p.276-279
Main Authors: Gerasimov, A. V., Kostyuchenko, V. P., Potapov, A. V., Varakuta, E. Yu, Karpova, M. R., Sukhanova, G. A., Logvinov, S. V.
Format: Article
Language:English
Subjects:
Animals
Biomedical and Life Sciences
Biomedicine
Cell Biology
Cytoplasm - metabolism
Cytoplasm - ultrastructure
Infradian Rhythm - physiology
Internal Medicine
Laboratory Medicine
Male
Mice
Morphology and Pathomorphology
Pathology
Photoperiod
Pineal Gland - cytology
Pineal Gland - metabolism
Rats
Rats, Wistar
Seasons
Secretory Vesicles - metabolism
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Summary:The numerical density of secretory granules dense-core vesicles (DCV) in the cytoplasm of pinealocytes of the pineal gland was estimated by transmission electron microscopy in male white mice and Wistar rats. The 3-day biorhythm and lunaphase changes in the DCV content in the perikaryon and the processes of pinealocytes, which are manifested significantly in different seasons of the year, are established. The three-day biorhythm in adult male mice in comparison with younger male rats is not expressed uniformly in different phases of the moon. The in-phase manifestation of infradian biorhythms in different species of animals during the year with an unchanged daily photophase indicates the existence of common external synchronizers for mammals of these biorhythms that are not associated with the light/dark cycle.
ISSN:0007-4888
1573-8221
DOI:10.1007/s10517-018-4147-1