Morphologic changes in the pineal gland of rats exposed to continuous darkness

@article{Sergina2016MorphologicCI,
  title={Morphologic changes in the pineal gland of rats exposed to continuous darkness},
  author={Svetlana Sergina and Viktor Alexandrovich Ilyukha and L. B. Uzenbaeva and Evgeniy Khizhkin and Ekaterina Antonova},
  journal={Biological Rhythm Research},
  year={2016},
  volume={47},
  pages={691 - 701}
}
Abstract We examined the pineal structure of rats exposed to constant darkness (DD) at light microscopic level. Two groups of rats were exposed to 12:12 light/dark cycle (LD) or DD from their prenatal ontogenesis and then for 3 months after birth. The gland structure of DD rats was observed to have an active appearance. Some of the observed pinealocytes with light nuclei from DD rats were determined to contain double nucleoli. Nuclear area and perimeter of both dark and light types were greater… Expand
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References

SHOWING 1-10 OF 39 REFERENCES
Light and electron microscopic examination of pineal gland in rats exposed to constant light and constant darkness.
TLDR
It was observed that the pinealocyte cell activity of rats exposure to constant darkness was increased but decreased in rats exposed to constant light, while the number of pinealocytes observed was extensive and some of the observed Pinealocytes were determined to contain double nucleoli. Expand
Morphologic changes in the pineal parenchyma cells of rats exposed to continuous light or darkness.
TLDR
Findings suggest that the pineal is an important functional part of the neuroendocrine mechanism regulating the gonads with regard to varying conditions of illumination. Expand
Cytology of the pineal gland: changes produced by various treatments.
  • C. Ralph
  • Medicine
  • Journal of neural transmission. Supplementum
  • 1978
TLDR
The cytological appearance of the pineal body is related to stage of development or age, time of day, exposure to illumination, season of the year, and reproductive state and exposure to stressful influences such as heat or cold. Expand
Postnatal evolution of the rat pineal gland: light microscopy.
TLDR
The postnatal development and morphology of the adult albino rat pineal gland was studied from one day up to ten months of age and there was a progressive increase in the number of connective tissue fibres. Expand
Comparisons of Sizes of Pinealocyte Nuclei and Pinealocytes in Young and Adult Chinese Hamsters (Cricetulus griseus) Under Different Photoperiod Conditions
TLDR
In the Chinese hamster, the relationships between nuclear area and area of pinealocytes with time of day vary, depending on the age of animals as well as different photoperiodic conditions, although they differ only slightly. Expand
Effect of photoperiod on pineal gland volume and pinealocyte size in the Chinese hamster, Cricetulus griseus.
TLDR
The results indicate that the development and differentiation of pinealocytes in both pineal portions may be advanced under long photoperiods and delayed under short photoperperiods, although pineAlocytes in the deep pineal may remain not fully differentiated even in adults. Expand
Time-related changes in size of nuclei of pinealocytes in rats
  • B. Diehl
  • Biology, Medicine
  • Cell and Tissue Research
  • 2004
TLDR
The question discussed is (i) whether or not probable superimposed infradian rhythms may account for the different diurnal patterns, and (ii) whether these patterns in the two regions indicate functional differences between the “cortex” and the ”medulla” of the rat pineal body. Expand
Effects of Long and Short Photoperiod on the Ultrastructure of Pinealocytes of the Cotton Rat (Sigmodon hispidus)
TLDR
The ultrastructure of the pinealocytes of wild‐captured cotton rats (Sigmodon hispidus) housed in either long or short photoperiod was examined to suggest that restricting the amount of light to which animals are exposed activates pineal cells of the cotton rat. Expand
The pinealocytes of the human pineal gland: A light and electron microscopic study.
TLDR
The pinealocytes of the pineal gland of children and adults were studied at both light and electron microscopic levels and a very small cell type with an extremely thin and elongated cell body and nucleus was found. Expand
Effect of Acute Light Exposure Upon Melatonin Content, NAT Activity, and Nuclear Volume in the Gerbil Pineal Complex
TLDR
The deep pineal gland did not demonstrate a response in melatonin content, NAT activity, or pinealocyte nuclear volumes upon exposure of gerbils to light at the time of the nocturnal peak in superficial pineal activity. Expand
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