Liver condition in rats during the toxigenic period of polychlorinated biphenyl intoxication
- Authors: Gainullina A.A.1, Gabdulkhakova I.R.1, Kayumova A.F.1, Ziyakaeva K.R.1, Samokhodova O.V.1
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Affiliations:
- Bashkir State Medical University
- Issue: Vol 106, No 1 (2025)
- Pages: 70-78
- Section: Experimental medicine
- URL: https://bakhtiniada.ru/kazanmedj/article/view/286127
- DOI: https://doi.org/10.17816/KMJ627352
- ID: 286127
Cite item
Abstract
BACKGROUND: Polychlorinated biphenyls (PCBs) exert diverse toxic effects on humans and animals, leading to disruption of the liver barrier function.
AIM: This study aimed to investigate the dynamics of relative liver mass and liver tissue morphology in experimental rats during the toxigenic period following PCB subacute administration.
METHODS: PCB intoxication was modeled in male Wistar rats (n = 60) weighing 200 ± 15 g and aged 3–4 months. The experimental groups were categorized as follows: Day 1 (n = 10), Day 28 (n = 10), and Day 56 (n = 10). Each experimental group had a corresponding control group (n = 10). The experimental rats (n = 30) received a daily oral administration of oil suspension of PCBs at a dose of 300 mg/kg body weight for 28 days, whereas the control rats received sunflower oil. Liver tissue samples were collected on days 1, 28, and 56 of the experiment for morphological analysis. The relative liver mass and the percentage of normal, abnormal, and degenerative hepatocytes were assessed. Descriptive statistics were applied, including the median Me (Q1 25%, Q3 75%), and the Mann–Whitney U test was used for non-parametric samples. Differences were considered statistically significant at p < 0.05.
RESULTS: On day 1 of the toxigenic period, the relative liver mass of the experimental rats increased by 1.2 times (p = 0.0496) compared with that of the control rats. By day 28, the relative liver mass of the experimental rats significantly decreased by 1.2 times (p = 0.0152) compared with that of the control rats. At the end of the experiment, by day 56, the relative liver mass significantly increased by 1.5 times (p = 0.0049) compared with the control values and by 1.8 times compared with that by day 28 (p = 0.0036). Morphological analysis of the liver tissue in experimental rats revealed abnormally enlarged hepatocytes (14%) on day 1 following the cessation of PCB administration. During the toxigenic period, the number of these cells increased to 35% on day 28 (p = 0.0002) and 47% on day 56 (p = 0.0002). At the end of the study, necrotically altered hepatocytes accounted for 22% of the total hepatocytes. Lymphoid cells were diffusely distributed along the intralobular sinusoidal capillaries and were present in the interlobular loose connective tissue within the portal zones of the liver.
CONCLUSION: In experimental animals with subacute PCB intoxication, inflammatory and destructive histomorphological changes were observed in the liver, along with an increase in the relative liver mass.
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##article.viewOnOriginalSite##About the authors
Aigul A. Gainullina
Bashkir State Medical University
Email: Gainullina@mail.ru
ORCID iD: 0009-0009-6351-8943
SPIN-code: 8416-1510
Senior Lecturer, Depart. of Normal Physiology
Russian Federation, 3 Lenin street, 450008, UfaIrina R. Gabdulkhakova
Bashkir State Medical University
Email: sabirova.i@mail.ru
ORCID iD: 0000-0002-8416-0719
SPIN-code: 9320-8161
MD, Cand. Sci (Med.), Assistant Prof., Depart. of Normal Physiology
Russian Federation, 3 Lenin street, 450008, UfaAliya F. Kayumova
Bashkir State Medical University
Email: annikachka@mail.ru
ORCID iD: 0000-0003-1983-1392
SPIN-code: 3949-6591
MD, Dr. Sci. (Med.), Prof., Head of the Depart. of Normal Physiology
Russian Federation, 3 Lenin street, 450008, UfaKlara R. Ziyakaeva
Bashkir State Medical University
Author for correspondence.
Email: krziyak@yandex.ru
ORCID iD: 0000-0002-3923-2736
SPIN-code: 3834-5307
Cand. Sci (Bio.), Assistant Prof., Depart. of Normal Physiology
Russian Federation, 3 Lenin street, 450008, UfaOksana V. Samokhodova
Bashkir State Medical University
Email: oksamohodova@yandex.ru
ORCID iD: 0009-0002-8954-4401
SPIN-code: 4277-6990
MD, Cand. Sci (Med.), Assistant Prof., Depart. of Normal Physiology
Russian Federation, 3 Lenin street, 450008References
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