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Bulyk R. Ye., Yosypenko V. R., Kryvchanska M. I., Vlasova K. V., Lukan Y. R. Age changes in the tigroid substance of neutrons of the lateral preoptic nucleus of hypothalamus under different light modes. Journal of Education, Health and Sport. 2021;11(10):269-274. eISSN 2391-8306. DOI http://dx.doi.org/10.12775/JEHS.2021.11.10.025 https://apcz.umk.pl/JEHS/article/view/JEHS.2021.11.10.025 https://zenodo.org/record/5645806 The journal has had 5 points in Ministry of Science and Higher Education parametric evaluation. § 8. 2) and § 12. 1. 2) 22.02.2019. © The Authors 2021; This article is published with open access at Licensee Open Journal Systems of Nicolaus Copernicus University in Torun, Poland Open Access. This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author (s) and source are credited. This is an open access article licensed under the terms of the Creative Commons Attribution Non commercial license Share alike. (http://creativecommons.org/licenses/by-nc-sa/4.0/) which permits unrestricted, non commercial use, distribution and reproduction in any medium, provided the work is properly cited. The authors declare that there is no conflict of interests regarding the publication of this paper. Received: 30.09.2021. Revised: 12.10.2021. Accepted: 29.10.2021. AGE CHANGES IN THE TIGROID SUBSTANCE OF NEUTRONS OF THE LATERAL PREOPTIC NUCLEUS OF HYPOTHALAMUS UNDER DIFFERENT LIGHT MODES R. Ye. Bulyk, V. R. Yosypenko, M. I. Kryvchanska, K. V. Vlasova, Y. R. Lukan Bukovinian State Medical University, Chernivtsi, Ukraine Bulyk R. Ye., Doctor of Medicine, Professor, Head of the Department of Medical Biology and Genetics, Bukovinian State Medical University, Chernivtsi, Ukraine, Fedkovych str. 15, 58022 Yosypenko V. R., Postgraduate Student of the Department of Medical Biology and Genetics, Bukovinian State Medical University, Chernivtsi, Ukraine, Fedkovych str. 15, 58022 Kryvchanska M.I., PhD, Associate Professor of the Department of Medical Biology and Genetics, Bukovinian State Medical University, Chernivtsi, Ukraine, Fedkovych str. 15, 58022 Vlasova K.V., PhD, Associate Professor of the Department of Medical Biology and Genetics,Bukovinian State Medical University, Chernivtsi, Ukraine, Fedkovych str. 15, 58022 Lukan Y.R., Teacher of the Department of Medical and Pharmaceutical Chemistry, Bukovinian State Medical University, Chernivtsi, Ukraine, Bogomoltsa str. 2, 58022, v.yosypenko@bsmu.edu.ua Abstract The article presents analysis of the results of the original histochemical studies of tigroid substance of neurons of the lateral preoptic nucleus of hypothalamus in mature and old rats under the influence of different light modes. In all observations, the tigroid substance was located in the cytoplasm of neurons of the lateral preoptic nucleus of hypothalamus in the form of individual granular formations of different sizes and shapes. The amount of tigroid substance of neurons of the lateral preoptic nucleus of hypothalamus in mature rats is greater than in older rats. At the same time, it should be noted that different experimental conditions significantly affected the amount of tigroid substance in neurons of the lateral preoptic nucleus of hypothalamus in old rats. In particular, under conditions of light deprivation, the optical density of specific histochemical staining for tigroid substance in neurons of the lateral preoptic nucleus of hypothalamus increased significantly (p Key words: sleep-wake cycle; lateral preoptic nucleus of hypothalamus; circadian rhythms; photoperiod. |
