Abstract
Early changes in the cardiovascular system of young Wistar rats were studied in modeling metabolic syndrome by a fructose load. It was found that despite some weight loss in rats fed a fructose diet, as compared to control animals, these animals showed the signs of metabolic syndrome: hyperglycemia, insulin resistance, dyslipidemia, increased activity of the sympathetic nervous system, arterial hypertension. Changes in the mesenteric arteries included an increase in the reactivity to phenylephrine and a decrease in acetylcholine-induced dilation due to decreased NO production by the endothelium, which is to a certain extent compensated by an increased production of the endothelium-derived hyperpolarizing factor realizing its effects through the activation of intermediate-conductance Ca2+-activated K+-channels. Fructose load led to the inhibition of soluble guanylate cyclase in arterial smooth muscle cells. In the skin microcirculatory bed of fructose-loaded rats, perfusion remained at the level typical for control animals, while skin microvessels showed an increase in neurogenic tone and an attenuation of endothelium-dependent tone. A decreased endothelial NO production was found in microcirculatory vessels, which was compensated by the synthesis of other endothelium-derived vasodilating factors.
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This study was supported by the program entitled “Basic Scientific Research for the Long-Term Development and Competitiveness of the Society and State” (47_110_LTDaC, 64.1)
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Conceptualization and experimental design, editing of the manuscript (G.I.L.); literature review, data collection and analysis, writing of the manuscript (I.A.Ts., G.T.I.).
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Translated by A. Polyanovsky
Russian Text © The Author(s), 2022, published in Rossiiskii Fiziologicheskii Zhurnal imeni I.M. Sechenova, 2022, Vol. 108, No. 9, pp. 1134–1147https://doi.org/10.31857/S0869813922090084.
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Tsareva, I.A., Ivanova, G.T. & Lobov, G.I. Early Functional Changes in Rat Arteries and Microcirculatory Vessels while Modeling Metabolic Syndrome. J Evol Biochem Phys 58, 1471–1481 (2022). https://doi.org/10.1134/S0022093022050179
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DOI: https://doi.org/10.1134/S0022093022050179