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3 . 2021

Pathogenetic mechanisms for the development of hematological disorders in induced fatty liver disease in Wistar rats and assessment of the regulatory effects of carnosine and α-lipoic acid

Abstract

The study of the relationship between hematopoiesis and metabolism is now particularly relevant in view of the high incidence of alimentary dependent diseases, including non-alcoholic fatty liver disease. In this regard, pathogenetic factors of this disease development are studied actively in order to choose adequate drug therapy and usage of bioactive substances with antioxidant properties.

The aim of the study was to study the pathogenetic relationship of hematological disorders and imbalance of growth factors, leptin and ghrelin in male Wistar rats in the model of the initial stage of non-alcoholic fatty liver disease development and to assess the regulatory effect of minor bioactive substances - carnosine and а-lipoic acid.

Material and methods. The studies were performed on male Wistar rats with initial body weight 150±10 g within 8 weeks. Animals were divided into 5 groups (n=8 in each). Rats of the control group received a complete modified diet AIN93M, in which soybean oil was replaced with sunflower oil and lard (1:1). Rats of the experimental groups consumed high-calorie choline-deficient diet (HCCDD), in which fat content was 45%, fructose content - 20% of the energy value of the diet. Rats of the 2nd group were fed HCCDD without any supplements, the 3rd group - with the addition of carnosine (75 mg/kg body weight), the 4th group - with the addition of α-lipoic acid (75 mg/kg body weight), the 5th group - with the combined addition of carnosine and α-lipoic acid in a total dose of 150 mg/kg body weight. Hematological values were determined on a hematological analyzer. The content of ghrelin and leptin, as well as growth factors GM- CSF and M- CSF in blood plasma and adipose tissue lysates, was determined by multiplex immunoassay using xMAP technology.

Results. Rat intake of HCCDD resulted in decreased hemoglobin levels and red blood cell scores compared to controls. Diet enrichment with carnosine and α-lipoic acid did not have a reliable effect on these indicators. Carnosine intake had a protective effect on erythrocyte volume, a decrease of which was recorded in other experimental groups. HCCDD stimulated the growth of the absolute number of leukocytes in peripheral blood due to granulocytes and mononuclears. The enrichment of HCCDD with carnosine and α-lipoic acid led to a further increase in leukocytosis, the maximum level of which was observed in the group of rats fed HCCDD, simultaneously enriched with carnosine and α-lipoic acid (14.86±1.48×109/l compared to 8.67±1.23×109/l in control). All diets used in the research had no effect on the number of erythrocytes and platelets in the peripheral blood of rats. The use of both HCCDD alone and in combination with carnosine or α-lipoic acid intake had a negative effect on the level of growth factors GM-CSF and M-CSF in blood plasma and adipose tissue. The consumption of HCCDD caused an increase in leptin blood level (8.54±0.69 compared to 2.58±0.37pg/ml in control, р<0.05), which was normalized by enriching the diet with carnosine and α-lipoic acid. Ghrelin blood level significantly decreased in all experimental groups compared to the control: by 30% in rats fed and by almost 50% when carnosine and α-lipoic acid were added to HCCDD. The intake of α-lipoic acid led to hormone level changes in adipose tissue lysates, leptin content decreased (2.31±0.11 vs 2.77±0.15 pg/ml), while ghrelin level significantly increased (0.35±0.14 vs 0.20±0.06 pg/ml), compared with the control group (р<0.05).

Conclusion. The revealed interrelation of parameters of the cellular composition of peripheral blood and hemoglobin content with the changes in the content of GM-CSF, M-CSF, leptin and ghrelin in blood plasma and adipose tissue indicates the mutual influence of the studied CSF, leptin, ghrelin and added antioxidants (carnosine and α-lipoic acid) on the regulatory mechanisms of hematopoiesis in rats fed HCCDD.

Keywords:nonalcoholic fatty liver disease, hematological indices, growth factors, leptin, ghrelin, carnosine, α-lipoic acid, rats

Funding. The research was carried out at the expense of subsidies for the fulfillment of a state task within the framework of the Program of fundamental scientific research (research topic No. 0529-2019-0058).

Conflict of interest. The authors declare no conflict of interest.

For citation: Riger N.A., Trushina E.N., Mustafina O.K., Timonin AN., Aksenov I.V., Guseva G.V., Tutelyan V.A. Pathogenetic mechanisms for the development of hematological disorders in induced fatty liver disease in Wistar rats and assessment of the regulatory effects of carnosine and α-lipoic acid. Voprosy pitaniia [Problems of Nutrition]. 2021; 90 (3): 6-19. DOI: https://doi.org/10.33029/0042-8833-2021-90-3-6-19 (in Russian)

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CHIEF EDITOR
CHIEF EDITOR
Viktor A. Tutelyan
Full Member of the Russian Academy of Sciences, Doctor of Medical Sciences, Professor, Scientific Director of the Federal Research Centre of Nutrition, Biotechnology and Food Safety (Moscow, Russia)

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