Abstract
The effect of 30-day dark deprivation (light-dark cycle 24/0 h, artificial illumination 300 Lux) on the morphofunctional state of the testes was studied using morphological and morphometric analysis of histological preparations of white mongrel male rats 4 months of age. The level of follicle-stimulating hormone in blood serum was assessed by enzyme immunoassay. It was found that 30-day dark deprivation increases the level of follicle-stimulating hormone in the blood serum. Morphological changes in the testes were characterized by a decrease in the area of Sertoli cells and their nuclei, the thickness of the spermatogenic epithelium. The hormonal background and morphofunctional state of the testes were corrected by the administration of exogenous melatonin for 14 days.
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