Abstract
Intragastric administration of melatonin in physiological doses (1 mg/kg body weight) for 14 days to C57BL/6 mice with light-induced functional pinealectomy model (24-h lighting for 14 days) results in an increase in the LYVE-1 expression area by 2.4 times and a significant increase in receptor concentration (1.6% decrease in staining brightness) in liver sinusoidal endothelial cells in comparison with animals kept under continuous lighting and not treated with the hormone, which indicates the formation of stability of the endothelial barrier in the organ. Melatonin treatment also enhanced lymphatic drainage in all it links (including interstitial non-vascular pathways and lymphatic vessels) and improved structural and functional parameters of blood circulation and lymph flow in the organ, which created conditions for reducing metabolic load on structural elements of the liver.
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