Influence of constant lightning on liver health: an experimental study.

Autor: Areshidze DA; A.P. Avtsyn Research Institute of Human Morphology, Moscow, Russian Federation., Kozlova MA; A.P. Avtsyn Research Institute of Human Morphology, Moscow, Russian Federation., Makartseva LA; A.P. Avtsyn Research Institute of Human Morphology, Moscow, Russian Federation., Chernov IA; Tyumen State Medical University, Tyumen, Russian Federation., Sinelnikov MY; A.P. Avtsyn Research Institute of Human Morphology, Moscow, Russian Federation. mikhail.y.sinelnikov@gmail.com.; Sechenov University, Moscow, Russian Federation. mikhail.y.sinelnikov@gmail.com., Kirillov YA; A.P. Avtsyn Research Institute of Human Morphology, Moscow, Russian Federation.
Jazyk: angličtina
Zdroj: Environmental science and pollution research international [Environ Sci Pollut Res Int] 2022 Nov; Vol. 29 (55), pp. 83686-83697. Date of Electronic Publication: 2022 Jun 30.
DOI: 10.1007/s11356-022-21655-3
Abstrakt: Light pollution has become a serious problem in many urbanized areas of the world. The impact of prolonged exposure to light and consequent disruption of natural circadian rhythms has significant health implications. The current study was undertaken to evaluate the effect of prolonged exposure to light, simulating urban light pollution, on liver health. In order to evaluate the effect of prolonged exposure to light, we examined the morphofunctional state, immunohistochemical and micromorphometric parameters of rat liver in normal conditions and following prolonged lighting exposure. Our results show that nocturnal light disruption triggers a cell death in the liver within 3 weeks (necrosis and apoptosis of hepatocytes) and stimulates a change in normal cellular karyometric parameters. At the same time, intracellular regeneration takes place within the organ, which manifests through hepatocyte hypertrophy. Under the influence of constant illumination, the circadian rhythms (CRs) of the size of hepatocytes and their nuclei are restructured, and the rhythm of the nuclear-cytoplasmic ratio is destroyed. The destruction of the CR of expression of p53 and Ki-67 also occurs against the background of the rearrangement of the daily rhythmicity of Per2 and Bmal1. The revealed changes in the morphofunctional state of the liver under the influence of light pollution indicate that a violation of normal illumination regimes is a potent factor leading to significant structural changes in the liver.
(© 2022. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)
Databáze: MEDLINE
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